CN100497483C - High-polymer modified pitch, its water-proof roll material and use thereof - Google Patents
High-polymer modified pitch, its water-proof roll material and use thereof Download PDFInfo
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- CN100497483C CN100497483C CNB2007101176932A CN200710117693A CN100497483C CN 100497483 C CN100497483 C CN 100497483C CN B2007101176932 A CNB2007101176932 A CN B2007101176932A CN 200710117693 A CN200710117693 A CN 200710117693A CN 100497483 C CN100497483 C CN 100497483C
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Abstract
The invention provides a polymer modified asphalt, and the weight of the components comprising as follows :45-55% matrix asphalt, 4 - 8% blend oil, 12 - 14% of SBS ,5-9 % APAO, 2-7% of High-temperature improvement and 15-20% filler. It also offers polymer modified asphalt, which made of waterproof membrane and the railway bridge, highway bridge deck waterproofing project applications. The invention of these waterproofing membrane have a high standard of waterproof function, it can withstand high intensity of railway bridge and particularly high stress dynamic load .It also have excellent performance on water-resistance, high and low temperature resistance, adhesion, crack resistance, fatigue resistance and other aspects .it can be used for railway bridge and the road deck waterproofing works.
Description
Technical field
The present invention relates to a kind of modifying asphalt, specifically, relate to a kind of high-polymer modified pitch, its waterproof roll and application thereof.
Background technology
Between the roofing, body of wall, lavatory that the high-polymer modified pitch coiled material is widely used in various building structure bathed, the waterproof of engineerings such as vault, freezer, pond, underground pipeline.Since 1991, modified bituminous pitch coiled material was applied in the highway bridge waterproofing work, and nineteen ninety-five is tending towards ripe and in line with international standards on selection, way.Once adopting the exhausted modified bituminous pitch coiled material has common glass fiber blank SBS modified bituminous pitch coiled material, PE film tire modified bituminous pitch coiled material and polyester blank APP modified bituminous pitch coiled material, has occurred the high heat-resisting APP modified bituminous pitch coiled material of highway bridge special use subsequently.
Common high-polymer modified pitch coiled material one is to being produced by building materials department, and its technological standard always is definite according to the requirement of roofing, underground works, does not consider the construction of special engineerings such as road surface, bridge floor and the needs in the use.In process of deployment, the heated bitumen temperature is up to more than 100 degree, must bear its high temperature and do not damage as the asphalt felt of handling partitioning slot; Places such as road surface, bridge floor, parking lot often have the vehicle of several tons even tens tons weights to grind simultaneously, this just requires asphalt felt and basic unit's bonding firmly, puncture, anti-pressing against brokenly property are good etc., and general polymer modified bituminous waterproof sheet material can not satisfy the needs of highway bridge special engineering.At present, developed the high heat-resisting APP modified asphalt waterproof coiled material of highway bridge special use both at home and abroad, has higher thermotolerance, can adapt to bituminous concrete high temperature to greatest extent and lay requirement, and has a higher high temperature resistance to shear, having adapted to the driving requirement when paving bituminous concrete preferably, is the water-proof material of present vehicular bridge waterproof whole structure the best, is used widely.
What the waterproof layer that China railways bridges and culverts engineering is used used at first is the heated bitumen waterproof layer, commonly three oily two cloth, i.e. two layers of burlap way of three layers of heated bitumen.China Ministry of Railways issued once in nineteen fifty-three that pitch burlap waterproof layer was a railway concrete bridge waterproof technique standard.The heated bitumen waterproof layer used for four more than ten years in China, but its high-temperature service, pitch volatile matter harm workers ' health, contaminate environment poisons air.In addition, temperature was very high when pitch boiled, and operated dangerous.Embrittlement when on waterproof quality, existing low temperature again, the drum that trickled during high temperature, aging cracking, the drawback of the seepage of rotting.
The nineties begins to adopt the chlorinatedpolyethylene polymer membranes as the railroad bridge water-proof material.The Ministry of Railways issued railroad industry standard (TB/T 2965-1999) " railway concrete bridge floor TQF-1 type waterproof layer technical qualification " in 1999, and regulation adopts polyurethane water-proof paint to paste chlorinated polyethylene waterproof roll as the railroad bridge waterproof layer.The chlorinatedpolyethylene polymer membranes begins to be used widely in the railway bridge waterproofing work.But this material construction reliability is poor, and antifatigue, ageing resistance can satisfy the railroad bridge waterproof requirement fully.
Summary of the invention
The purpose of this invention is to provide a kind of railway bridges and culverts high-polymer modified pitch that is used for, it has stronger resistance to elevated temperatures, fatigue performance, anti-shear performance.
Another object of the present invention provides a kind of preparation method who is used for railway bridges and culverts high-polymer modified pitch.
An also purpose of the present invention provides a kind of polymer modified bituminous waterproof sheet material that is used for the railway bridges and culverts, water-proof function with higher standard, can bear extra high stress, have the performance more excellent more at aspects such as water tolerance, resistant of high or low temperature, cohesiveness, anti-fragility, resistance to fatigues, satisfy the waterproof requirement under railway bridge high strength and the dynamic loads environment fully than highway bridge waterproof layer.
Another purpose of the present invention provides a kind of preparation method who is used for the polymer modified bituminous waterproof sheet material of railway bridges and culverts.
A further object of the present invention provides the application of waterproof roll in railway bridges and culverts, highway bridge waterproofing work of high-polymer modified pitch.
In order to realize the object of the invention, high-polymer modified pitch of the present invention is made up of following component and weight content thereof: 45～55% matrix pitches, 4～8% mixed oils, 12～14%SBS, 5～9%APAO, 2～7% high temperature activators and 15～20% stopping composition.
Described matrix pitch is 90
#～140
#Pitch.
Described mixed oil is the decompression third fractional oil.
The Chinese of SBS be benzene second rare-butadiene block copolymer, (Chinese of melt index 0.3～1.0g/10min) is a randompoly-to APAO.
Described high temperature activator is polypropylene, polyethylene or polystyrene etc.
Described stopping composition is inorganicss such as fine particle calcium carbonate, stone flour, ground dolomite or coal dust ash.
High-polymer modified pitch of the present invention can adopt the preparation of direct consolute method, is about to properties-correcting agent such as SBS and adds deployed and be heated in 180～200 ℃ the pitch, mixes under high temperature and high shear forces.
Concrete preparation process is:
1) adds matrix pitch and mixed oil by proportioning, be warming up to 170～180 ℃;
2) add formula ratio SBS;
3) be warming up to 180～185 ℃, behind swelling 1～2h, adopt colloidal mill to grind 2～3h, till the visible small-particle of no naked eyes;
4) add APAO and high temperature activator, under 190～195 ℃, mix 2～3h;
5) add filler at last, high-speed stirring 30～60min.
Can be made into waterproof roll by high-polymer modified pitch of the present invention, this waterproof roll is the tire base with long polyester felt, SBS with low temperature performance excellent is main properties-correcting agent, and add to strengthen high-temperature behavior, the formulated high-polymer modified pitch of multiple auxiliary modifier that improves antifatigue, anti-shear performance is coating material, makes the made sheet water-proof material that can curl of surperficial isolated material with fine sand.
A kind of polymer modified bituminous waterproof sheet material of the present invention comprises a tire basic unit, described tire basic unit double-sided adhesive modified asphalt layer, and the two-sided sealing coat that is covered with of described modified asphalt layer.
Described tire basic unit adopts polyester non-woven fabric, is preferably long polyester non-woven fabrics.
Described sealing coat can adopt fine sand to make, and is preferably 60～80 order fine sands.
Polymer modified bituminous waterproof sheet material of the present invention can be produced on the automatization coil production line.This production line comprises the equipment of preparation, heat-conducting oil heating system, water cooling system and the environment friendly system of coiled material moulding linkage production line, modified asphalt layer.Production process mainly comprises the preparation and the coiled material moulding two big operations of modifying asphalt.
The basic process of production of polymer modified bituminous waterproof sheet material of the present invention is included as successively: the uncoiling of tire basic unit, the oven dry of tire basic unit, tire basic unit flood modifying asphalt, dual coating modified asphalt layer, cover isolated material, draw compacting, cooling and shaping, coiled material.
Wherein, described bake out temperature is 160～180 ℃; Dipping temperature is 190～200 ℃; Being coated with modification brea bed temperature is 185～195 ℃; Cooling temperature is 30～40 ℃, and the speed of a motor vehicle is 20～28m/min.
Polymer modified bituminous waterproof sheet material of the present invention, has high-level water-proof function, can bear the extra high stress that railway bridge high strength and dynamic loads produce, have excellent performance at aspects such as water tolerance, resistant of high or low temperature, cohesiveness, anti-fragility, resistance to fatigues, can be used for the waterproofing work of railway bridges and culverts, highway bridge.
After testing, all by detecting, the physical performance index of this waterproof roll sees Table 1 for every performance of polymer modified bituminous waterproof sheet material of the present invention and railway bridge application performance and endurance quality.Following method for testing performance all adopts national standard.
The physicals of table 1 polymer modified bituminous waterproof sheet material of the present invention
Of the present inventionly be used for railway bridges and culverts high-polymer modified pitch and waterproof roll has the following advantages:
1. excellent in water resistance.The tire base of waterproof roll of the present invention is long polyester non-woven fabrics, is that robust water immersion performance that do not absorb water and long-term is unattenuated; Pitch does not all absorb water with the rubber, the resin that are used for modification, so coiled material does not absorb water.Performance can not decay yet under water surrounding for a long time, while coiled material tensile strength height, so under pressure water action, can not penetrated yet, hydrodynamic impermeability test 0.4MPa pressure water keeps 24h waterproof down, and some have only extension not have the material of intensity, can not bear pressure water, the SBS/APP modified bituminous pitch coiled material of polyester blank and heat construction thereof are uniquely can be used to have the pressure underground works separately in German DIN18195 standard.In addition, some carcass material is suction as short fiber polyester felt tackiness agent, the big lossy of performance behind the high-alkali glass felt chance water.
2. You Yi splitting resistance.This be by the high tensile strength of coiled material, elongation at break is big, thickness is big and the caoutchouc elasticity of composition polymer modifying asphalt, extensibility (〉 980%) and the result of over-all properties effect such as toughness.Wherein thickness plays an important role to the excellent resistance to cleavage of modified bituminous pitch coiled material greatly.Waterproof layer is thick more, is beneficial to the extension area expansion, helps resisting the crack more and occurs.Some macromolecular material unit elongation is very big though Here it is, and thickness only has 1mm, and the width that the waterproof layer participation was extended when the crack occurred is few.According to the pertinent data introduction, 1.2mm the EPDM membrane maximum is born, and the wide 4.4mm in crack, 1.2mm chlorinatedpolyethylene maximum bear the wide 2.0mm in crack, 1.2mm chlorinatedpolyethylene 603 (chlorinatedpolyethylene of woven fiber glass reinforcement) maximum is born the loose 0.05mm in crack, the PVC maximum of 2mm is born the wide 3.7mm in crack, and SBS/APP modified bituminous pitch coiled material thickness 4mm maximum is born the wide 6.9mm in crack.
3. You Yi cohesiveness.1. this at first depends on resin and the colloid that contains in the chemical constitution of petroleum pitch about 70%, and these two kinds of compositions are all had an adhesive property, are exactly a kind of matrix material commonly used since ancient times.Having injected resins such as SBS rubber and APAO again through in the pitch of modification, all is the starting material of producing matrix material, so high-polymer modified pitch self tool adhesive property is apodeictic.2. also show the adhesion test that no matter adopts " 8 " type matrix from the adhesive property test to the modifying asphalt coating material of railway bridge waterproof roll special formulation and after making coiled material, still adopt the cohesive strength instrument to test its pull strength, its result is all more than 0.7Mpa; 3. the adhesive property that has waterproof layer under stress by fatigue test proof railway bridge waterproof roll.The fatigue test of girder is a waterproof layer at 2,000,000 50HZ frequencies tack coat no change under pressure and the pulling force effect repeatedly.The fatigue test of crossbeam is that waterproof layer coiled material and basic unit bonding under 8,000,000 (50HZ frequency) load stress effects is still firm, and no wrinkling and cracking is included in former crack and locates the agglutinating coiled material.4. engineering experiment proof high-polymer modified pitch coiled material hot melt sticks on the decking waterproof matrix, and waterproof layer does not have the disengagement phenomenon through using for many years, shows its agglutinating weather resistance.
4. You Yi high and low temperature resistance, plastic zone and use temperature interval are wide, and this is owing to mixed SBS elastomerics and APAO resin and superpolymer damping plastic material in the pitch, and the characteristic of promptly giving asphalt rubber is had the resin high-temperature stability again.Coiled material does not split-35 ℃ of following bendings, reaches the flexibility of polymer coiled material.Under-60 ℃, still can keep function, all can make suitablely at the high temperature extremely frigid zones, coiled material be placed-20 ℃ of following low temperature, the flawless when coiled material of rolling launches.
5. excellent size stability, this performance is to guaranteeing coil waterproof layer dimensional stabilizing when high temperature and low temperature change repeatedly, this also is the advantage of polyester blank modified bituminous pitch coiled material than polymer coiled material, railway bridge waterproof roll dimensional change after heating 24h thermal treatment under 80 ℃ has only 0.2%, and the polymer coiled material is all about 2%, that is to say under the 10m long paper material waterproof layer low temperature and will shrink 20cm that this is a no small size.Coiled material is subjected to the effect of tensile stress during contraction, and butt seam produces and threatens, and the coiled material of thin portion also can be peeled off with basic unit.
6. ageing-resistant.Coiled material tire base is polyester non-woven fabric (man-made fiber), has resistant to chemical media corrosive performance, and upper and lower two surfaces of tire base scribble thick high-polymer modified pitch.The composition of pitch and SBS rubber, resin has determined the performance of material resistance to chemical attack.Property retention after dip test in acid, alkali, salt medium is about 90%, and the property retention after the thermal treatment is also 90%.Data show coiled material for a long time under the chemical mediator environment performance still keep.Weather condition such as the ageing-resistant performance of coiled material is promptly fast light, hot, ultraviolet ray, this is the enough volumes and advanced modifying asphalt preparation system decision of superpolymer in the high-polymer modified pitch prescription.The SBS volume was at 12% o'clock in research and the production test proof pitch, the SBS particle passes through swelling in heated bitumen after high shear colloid mill is ground, SBS becomes molecule and is dispersed in the pitch, properties-correcting agent such as auxiliary APAO also dissolve mixing wherein simultaneously, superpolymer material such as SBS is successive and forms the cross network structure in this moment modifying asphalt, pitch is wrapped up by high polymer material, so modifying asphalt has the anti-aging property of superpolymer properties-correcting agent materials such as SBS fully.
7. modifying asphalt of the present invention has high strength and hardness, the centre accompanies long polyester non-woven fabrics, the thickness that has minimum 3.5mm is simultaneously given characteristics such as coiled material is anti-ly pressed against wound, anti-pierced through, strong shock resistance, can bear piercing through of vehicle pass-through in the construction process, spreading and ballast aggregate.
8. through the examination of fatigue test, waterproof roll has unusual resistance to fatigue.The formation condition of this performance is the long polyester non-woven fabrics of T032 type 1., grammes per square metre 270g/m
2, high tensile (greater than 850N/50mm), and tool snappiness, extensibility, the resistance to fatigue (foreign data is introduced 60000 fibers of alternating bending and do not ruptured) of self.Rubber properties such as high strength, height extend, stiffness is big, thickness is big simultaneously, thus 2,000,000 waterproof layer no changes of fatigue performance test girder, 2,000 ten thousand safe no changes of waterproof layer of the fatigue test of crossbeam.This coiled material of evidence has excellent fatigue performance, can bear railroad bridge load and stress fully.
9. good application property.Water-proof material is a kind of starting material for waterproofing work, need be routed on the waterproof matrix.For railroad bridge, coil waterproof layer must be firm with basic unit and coiled material and the permanent bonding of coiled material, can not peel off under any stress being subjected to.Waterproof roll adopts hot melt process that coiled material is sticked at basic unit, and with flame baking coiled material bottom surface brea bed the time, the asphalt temperature of trickling is pasted immediately and guaranteed that bonding firmly about 250 ℃.And self bond, seam is durable, reliable, strong 10000 tensile stresss circulation of non-deformability is not broken; Hot-melt application is strong to the suitable property of basic unit's condition, all can bond with various materials.The hot melt process construction is strong to the acclimatization ability, no matter still all can construct throughout the year in the hot-zone in high and cold district.Operating practice also shows easy construction, quick, through engineering approaches level, reliable in quality degree height.
Polymer modified bituminous waterproof sheet material of the present invention has the incomparable comprehensive superiority of a series of other materials, and all properties of chlorinatedpolyethylene coiled material except that unit elongation that uses at present all is inferior to waterproof roll of the present invention greatly.
Description of drawings
Fig. 1 is the structural representation of polymer modified bituminous waterproof sheet material of the present invention;
Displacement time curve when Fig. 2 detects waterproof roll seam deformability for the present invention.
Among the figure:
1 tire basic unit, 2,4 modified asphalt layer
3,5 sealing coats
Embodiment
Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
The present embodiment high-polymer modified pitch is made up of following component: 510kg matrix pitch, 70kg mixed oil, 140kgSBS, 90kgAPAO, 40kgIPP (polypropylene), 150kg stone flour (200 order).
Matrix pitch selects the 90# pitch of Qinhuangdao from the difficult to understand sharp crude oil processing of Venezuela's import, SBS selects the Yanshan Petrochemical 4402 type trades mark for use, APAO (melt index 0.3g/10min) selects for use Liaoyang the Liao Dynastyization to reach very that chemical industry limited liability company limited produces, IPP selects Yanshan Petrochemical polypropylene 9020 for use, and mixed oil is selected Liaohe River decompression third fractional oil (density 0.94g/ml) for use.
The preparation process of high-polymer modified pitch is as follows:
1) adds 510kg matrix pitch and 70kg mixed oil earlier, be warming up to 180 ℃;
2) add 140kg SBS then therein;
3) be warming up in 185 ℃, swelling 1h starts colloidal mill afterwards and grinds 2h, till the visible small-particle of no naked eyes;
4) add 90kg APAO and 40kg IPP again, controlled temperature mixes 2h at 195 ℃;
5) add 150kg stone flour, high-speed stirring 30min at last;
6) detect, squeeze into hold-up vessel after qualified to prepare to reach the standard grade production.
At this moment, high-polymer modified pitch is made waterproof roll, comprise tire basic unit 1, tire basic unit 1 double-sided adhesive modified asphalt layer 2 and 4 adopts acrylic resin as binding agent, is covered with sealing coat 3 on the modified asphalt layer 2, is covered with sealing coat 5 on the modified asphalt layer 4.As shown in Figure 1.
Tire basic unit 1 is T032 type 270g/m
2Long polyester non-woven fabrics, produce by the limited company of the non-manufacturing cloth of Jia Simaiwei (Shanghai).Sealing coat 3 and 5 is 80 order fine sands.
Polymer modified bituminous waterproof sheet material is produced on the automatization coil production line of U.S. A Di company.Production process is included as successively: the uncoiling of tire basic unit, the oven dry of tire basic unit, tire basic unit flood modifying asphalt, dual coating modified asphalt layer, cover isolated material, draw compacting, cooling and shaping, coiled material.
Wherein, bake out temperature is controlled at 160 ℃; Dipping temperature is 190 ℃; Being coated with modification brea bed temperature is 195 ℃; Cooling temperature is 30 ℃, and the speed of a motor vehicle of production line is 28m/min.The thickness of polymer modified bituminous waterproof sheet material is 4.0mm.
Substantially with embodiment 1, different is that high-polymer modified pitch is made up of following component: 450kg matrix pitch (140# pitch), 80kg mixed oil, 130kgSBS, 70kgAPAO (melt index 1.0g/10min), 70kg polyethylene, 200kg ground dolomite (300 order).
The preparation process of high-polymer modified pitch is as follows:
1) adds 450kg matrix pitch and 80kg mixed oil earlier, be warming up to 170 ℃;
2) add 130kg SBS then therein;
3) be warming up in 180 ℃, swelling 2h starts colloidal mill afterwards and grinds 3h, till the visible small-particle of no naked eyes;
4) add 70kg APAO and 70kg polyethylene again, controlled temperature mixes 3h at 190 ℃;
5) add 200kg ground dolomite, high-speed stirring 50min at last;
6) detect, squeeze into hold-up vessel after qualified to prepare to reach the standard grade production.
The waterproof roll structure of being made by high-polymer modified pitch is with embodiment 1, comprise tire basic unit 1, tire basic unit 1 double-sided adhesive modified asphalt layer 2 and 4 adopts acrylic resin as binding agent, be covered with sealing coat 3 on the modified asphalt layer 2, be covered with sealing coat 5 on the modified asphalt layer 4.Sealing coat 3 and 5 is 40 order fine sands.
The production process of polymer modified bituminous waterproof sheet material is with embodiment 1, and processing parameter is: bake out temperature is controlled at 170 ℃; Dipping temperature is 195 ℃; Being coated with modification brea bed temperature is 190 ℃; Cooling temperature is 40 ℃, and the speed of a motor vehicle of production line is 30m/min.The thickness of polymer modified bituminous waterproof sheet material is 4.5mm.
Embodiment 3
Substantially with embodiment 1, different is that high-polymer modified pitch is made up of following component: 550kg matrix pitch (100# pitch), 40kg mixed oil, 120kgSBS, 90kgAPAO (melt index 0.6g/10min), 20kg polystyrene, 180kg light calcium carbonate powder (150 order).
The preparation process of high-polymer modified pitch is as follows:
1) adds 550kg matrix pitch and 40kg mixed oil earlier, be warming up to 175 ℃;
2) add 120kg SBS then therein;
3) be warming up in 185 ℃, swelling 1h starts colloidal mill afterwards and grinds 2h, till the visible small-particle of no naked eyes;
4) add 90kg APAO and 20kg polystyrene again, controlled temperature mixes 2h at 195 ℃;
5) add 180kg light calcium carbonate powder, high-speed stirring 60min at last;
6) detect, squeeze into hold-up vessel after qualified to prepare to reach the standard grade production.
High-polymer modified pitch is made waterproof roll, comprises tire basic unit 1, and tire basic unit 1 double-sided adhesive modified asphalt layer 2 and 4 is covered with sealing coat 3 on the modified asphalt layer 2, be covered with sealing coat 5 on the modified asphalt layer 4.As shown in Figure 1.
Tire basic unit 1 is T032 type 300g/m
2Long polyester non-woven fabrics, produce by the limited company of the non-manufacturing cloth of Jia Simaiwei (Shanghai).Sealing coat 3 and 5 is 50 order fine sands.
The production process of polymer modified bituminous waterproof sheet material is with embodiment 1, and processing parameter is: bake out temperature is controlled at 180 ℃; Dipping temperature is 200 ℃; Being coated with modification brea bed temperature is 185 ℃; Cooling temperature is 35 ℃, and the speed of a motor vehicle of production line is 30m/min.The thickness of polymer modified bituminous waterproof sheet material is 3.5mm.
Experimental example 1
This experimental example carries out conventional physicals test at the waterproof roll of embodiment 1-3.The results are shown in Table 2.
The conventional physicals test result of table 2
Conclusion: every physicals of the waterproof roll of embodiment 1-3 all meets quality index, every excellent performance.
Experimental example 2
This experimental example is to study the application performance and the endurance quality of waterproof roll of the present invention.
In order further to investigate the application reliability and the weather resistance of waterproof roll of the present invention and water-proof material thereof, carried out application performance (comprising adhesive property, resistance to cleavage), environmental stability (comprising the mechanical property under uvioresistant, the high low temperature) and stressed under tests such as anti-fatigue performance.
1. resistance to cleavage detects
1.1 testing method
In order to investigate the ability that waterproof roll bears base course crack, the present invention has designed following splitting resistance testing method:
Fragility test specimen substrate preparation: cement and sand are made sand-cement slurry by 1:3, and therebetween layer of steel wire net is made three of ferro-cement plates that are of a size of 200mm * 100mm * 10mm, and is at room temperature standby behind the maintenance 28d.
One side both sides on substrate, brushing pitch are base treatment agent (claiming adhesive bitumen primer again), and every limit brushing area is 200mm * 30mm.After treating the base treatment agent drying, the baking of the coiled material test specimen of embodiment 1 is bonded at the substrate surface of brushing base treatment agent, pastes firmly.Place 24h under the room temperature.
The test specimen coiled material towards last, is placed on the position frame of splitting resistance determinator, adjusts the bottom screw rod triangle blade is contacted with test specimen bottom one-tenth vertical direction, the handle of rotating screw bolt slowly cracks cement briquette gradually then.
1.2 detected result
The results showed that the cement briquette crackle reaches 3～4mm, coiled material still remains intact, not cracking.
2. the seam deformability detects
2.1 testing method
Prepare the cement concrete test specimen of strength grade C30 by JGJ/T55-1996 (detection of seam deformability) design of common concrete proportioning rules, size 400 * 200 * 50mm, maintenance 21 days is standby.Remove surperficial laitance, brushing pitch is base treatment agent (claiming adhesive bitumen primer again), and hot melt process construction coiled material is adopted in dry back on the test specimen surface, then the anti-24h that puts under standard conditions.Set up a separatist regime by force of arms concrete substrate below, form groove, the crack above the kerf produces with the deformation test machine.
Test specimen is installed on the deformation test machine, and the power F of warranty test machine is in the same plane of the waterproof system of test.Test is carried out at 23 ℃ ± 2 ℃.
In 60s produces 0.5mm in the time crack, begin the circulation change fracture width then earlier, change frequency 1Hz, amplitude △ w=0.25mm, average crack width are Wm=0.50mm, the relation curve of time and displacement is seen Fig. 2, uses formula
Expression.
2.2 detected result
Through carrying out 10000 round-robin tests, waterproof system does not have destruction, shows excellent opposing basic unit distortion and basic unit's vibrations fatigue characteristic.
3. detect with concrete base layer bonding pull strength
3.1 testing method
Adopt the multi-functional strength tester of SHJ-40 type to carry out pull-out test, by 3 reaction supportings the coiled material that hot melt sticks on the concrete base layer is produced pulling force during detection, utilize the pulling out method principle to measure to extract used power to calculate coiled material and concrete bonding stripping strength.
3.2 detected result
Adopt present method the waterproof roll of embodiment 1-3 to be carried out 8 bondings of every sample of test pull-out test point of bonding pull strength.Test-results sees Table 3.
Table 3 drawing cohesive strength test result
Conclusion: waterproof roll hot melt 1. of the present invention sticks on the concrete base layer, all test point of its cohesive strength all cohesive strength value 2. average more than the 0.60MPa all more than 0MPa72MPa and no significant difference 3. show the reliability of waterproof roll hot melting cohesion of the present invention.
4. the detection of the elongation at break under pulling force and the maximum pull in-20 ℃～+ 60 ℃ scopes
4.1 testing method
With the long polyester non-woven fabrics of the T032 type waterproof roll (is example with embodiment 1) that is the tire base, the test test specimen of thickness 3.5mm and two kinds of specifications of 4.5mm is placed on constant temperature 1h under-20 ℃ ,-10 ℃, 23 ℃ standard test conditions, 60 ℃ of four kinds of test temperatures, and carries out Erichsen test under uniform temp.
4.2 test-results
Tensile property the results are shown in Table 4 after testing.
Coiled material pulling force characteristic under the table 4 all temps environment
Show by last watch test data, with the long polyester felt of T032 type is the tire base, modifying asphalt is that the waterproof roll of modified asphalt layer tensile strength under 60 ℃ of high temperature satisfies the standard value of JC/T974 standard SBS coiled material also more than 800N, at-10 ℃ of following elongation at breaks also more than 40%.Satisfy the requirement of JC/T974 standard 40%, though at-20 ℃ of following elongation at breaks also more than 35%.Show that waterproof roll of the present invention is good to the adaptability of temperature.
5. artificial accelerated aging Performance Detection
5.1 testing method
What cause organic materials agingly has chemical mediator and a climatope; the resistant to chemical media of waterproof roll excellence of the present invention and the performance of thermal ageing show in traditional performance detects; though waterproof roll is being to be laid under the protective layer on the railroad bridge; consider that ageing resistance is the inner quality of reaction material, carried out artificial accelerated aging test so replenish.
Carry out illumination 1000h (the about 2000MJ/m of accumulative total quantity of radiant energy by GB1824 (architectural waterproof material aging testing method) standard the 4th joint
2) after the processing, test specimen is placed 24h under standard conditions, test its pulling force, elongation at break and low-temperature bending performance.
5.2 detected result
After testing, under the situation of artificial accelerated aging, pulling force, elongation at break and low-temperature bending results of property see Table 5.
Table 5 coiled material artificial accelerated aging test result
Conclusion: polymer modified bituminous waterproof sheet material ageing-resistant performance of the present invention is good.
6. the waterproof roll fatigue property detects
On traditional performance and all satisfactory basis of above additional properties test, also carried out the fatigue test of bridge deck water-proof coiled material, railway institute of institute of iron section specialized designs has for this reason made two beams, the fatigue lifetives of waterproof roll under examination difference respectively is stressed.
6.1 Steel Concrete girder
Beam length 6m, wide 0.2m, high m.Two equal hot melts in plane up and down at beam are pasted waterproof roll (3.5mm is thick).Load back upper surface waterproof roll pressurized, and lower surface waterproof roll tension, investigate effect repeatedly down coiled material and basic unit's cohesiveness or when beam cracks adhesive surface whether distortion is arranged.
Test-results shows: under the test conditions of vibrational frequency 50HZ, act on 2,000,000 times the waterproof roll of upper and lower two faces and the equal no change of the adhesive surface of basic unit repeatedly.
6.2 concrete shearing branching beam fatigue test
In the girder experiment on fatigue properties, carry out the fatigue test of concrete crossbeam, test be the paving of waterproof roll hot melt in brushing base treatment agent and exsiccant through beam substrate surface, stressed fulcrum is in the beam middle part.This test objective is an examination beam when vibrating under being subjected to load, and that whether fulcrum advancing side coil waterproof layer occurs is wrinkling, throw off, and whether coiled material crackle occurs during concrete compression.
Test-results shows, under the effect repeatedly of 50HZ frequency vibration 2,000 ten thousand times, waterproof roll and tack coat do not have any variation.
6.3 fatigability at concrete shearing branching beam location of cracks examination coil waterproof layer
Paste coiled materials at three of precast beam existing fissured positions, two wide all about 1cm of planar seam, about the 2mm of crack, side, test shows and acts on 2,000 ten thousand times repeatedly that observation location of cracks waterproof layer has no change.
Show after testing, act on location of cracks waterproof layer no change repeatedly 2,000 ten thousand times.
Conclusion: from the traditional performance of waterproof roll of the present invention and the tests such as slip resistance, drawing cohesive strength, aging resistance and fatigue test that replenish, waterproof roll of the present invention has high-level water-proof function, can bear the extra high stress that railway bridge high strength and dynamic loads produce, have excellent performance at aspects such as water tolerance, resistant of high or low temperature, cohesiveness, anti-fragility, resistance to fatigues, can be used for the waterproofing work of railway bridges and culverts, highway bridge.
Though above the present invention is described in detail with a general description of the specific embodiments, on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, these modifications or improvements all belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.
Claims (8)
1. high-polymer modified pitch, it is characterized in that it is made up of following component and weight content thereof: 45～55% matrix pitches, 4～8% mixed oils, 12～14%SBS, 5～9% randompoly-s, 2～7% high temperature activators and 15～20% stopping composition; Described mixed oil is the decompression third fractional oil; Described high temperature activator is polypropylene, polyethylene or polystyrene; Described stopping composition is fine particle calcium carbonate, stone flour or coal dust ash.
2. high-polymer modified pitch according to claim 1 is characterized in that, described stone flour is a ground dolomite.
3. high-polymer modified pitch according to claim 1 and 2 is characterized in that, described matrix pitch is 90
#～140
#Pitch.
4. prepare the method for any described high-polymer modified pitch of claim 1-3, it is characterized in that, comprise the steps:
1) proportioning by claim 1 adds matrix pitch and mixed oil, is warming up to 170～180 ℃, and described mixed oil is the decompression third fractional oil;
2) add proportional quantity SBS;
3) be warming up to 180～185 ℃, behind swelling 1～2h, adopt colloidal mill to grind 2～3h;
4) add APAO and high temperature activator, mix 2～3h under 190～195 ℃, described high temperature activator is polypropylene, polyethylene or polystyrene;
5) add stopping composition at last, high-speed stirring 30～60min, described stopping composition are fine particle calcium carbonate, stone flour or coal dust ash.
5. by any waterproof roll that described high-polymer modified pitch is made of claim 1-3, it is characterized in that, comprise one deck tire basic unit, described tire basic unit double-sided adhesive modified asphalt layer, and the two-sided sealing coat that is covered with of described modified asphalt layer.
6. waterproof roll according to claim 5 is characterized in that, described tire basic unit adopts polyester non-woven fabric, and described sealing coat adopts 60～80 order fine sands.
7. the method for preparing the waterproof roll of claim 5 or 6, it is characterized in that, in turn include the following steps: on production line, carry out the uncoiling of tire basic unit, the oven dry of tire basic unit, tire basic unit dipping modifying asphalt, dual coating modified asphalt layer, cover sealing coat, traction compacting, cooling and shaping and coiled material, wherein, described bake out temperature is 160～180 ℃; Dipping temperature is 190～200 ℃; Being coated with modification brea bed temperature is 185～195 ℃; Cooling temperature is 30～40 ℃, and the speed of a motor vehicle of production line is 20～28m/min.
8. claim 5 or 6 the application of waterproof roll in railway bridges and culverts, highway bridge waterproofing work.
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| CNB2007101176932A CN100497483C (en) | 2007-06-21 | 2007-06-21 | High-polymer modified pitch, its water-proof roll material and use thereof |
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| CNB2007101176932A CN100497483C (en) | 2007-06-21 | 2007-06-21 | High-polymer modified pitch, its water-proof roll material and use thereof |
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| CN100497483C true CN100497483C (en) | 2009-06-10 |
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