CN104805826A - Method for preparing solidified soil in use of soil stabilizer - Google Patents
Method for preparing solidified soil in use of soil stabilizer Download PDFInfo
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- CN104805826A CN104805826A CN201510162761.1A CN201510162761A CN104805826A CN 104805826 A CN104805826 A CN 104805826A CN 201510162761 A CN201510162761 A CN 201510162761A CN 104805826 A CN104805826 A CN 104805826A
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Abstract
The invention provides a method for preparing solidified soil in use of a soil stabilizer. The method comprises the steps: (1) providing the soil stabilizer and diluting the soil stabilizer with water, thereby obtaining a solution containing the soil stabilizer, wherein the soil stabilizer is Lubang ion soil stabilizer; (2) uniformly mixing soil and the solution containing the soil stabilizer, thereby obtaining a mixed material, wherein the mass ratio of the soil stabilizer and the soil in the solution containing the soil stabilizer is 1: 10000 to 2: 10000 and the soil is red clay in the middle region of Zhejiang province in China; (3) grinding the mixed material, thereby obtaining the solidified soil with compactness of 96-98%.
Description
Technical field
The present invention relates to foundation technology field, particularly relate to a kind of preparation method of solidified earth.
Background technology
Along with developing rapidly of China's road infrastructure building size, the traffic volume and heavy-duty vehicle grow with each passing day, and propose requirements at the higher level to the functional performance of the road structure of each grade road.In order to ensure highway engineering quality and reduce construction costs, select efficient road materials most important.Traditional basic unit's road materials generally adopts natural sand building stones, sandy gravel etc., but this kind of resource is fewer and feweri, and construction cost is also high, also larger with pollution to environmental disruption.
In Zhejiang, the geology soil layer in area mostly is by rhyolite, tuff breccia Weathering-residual and the admaic earth that formed.Admaic earth has the physics different from normally depositing adhesive soil and mechanical characteristics, it is obvious that it shows as reticulate pattern feature, clay content is high, density is low, Atterberg Limit is high, compactibility is poor, thus many engineering harms can be caused in engineer applied, as dry temperature contract cause shrinkage crack, meet soft of soil and easily run off, form differential settlement etc.Generally adopt the conventional soil curing materials such as cement, lime, flyash in existing highway engineering, but this exists, and is mainly manifested in: solidified earth strength derived value is slow, and early strength is low, affects construction speed significantly not enough; Solidified earth drying shrinkage is large, easy to crack, water stability is poor; Solidified earth is comparatively large by soil class restriction, and clay, organic soil and the salinized soil solidification effect high to index of plasticity are poor, even do not have solidification, is thus difficult to meet the needs of regional engineering construction development in Zhejiang.
Summary of the invention
In view of this, necessary to provide in a kind of applicable Zhejiang area, the soil of construction ground can be utilized to prepare the method for solidified earth, the method has that energy conservation, cost are lower, advantage to environmental disruption and less pollution, can meet the needs of engineering construction development.
The invention provides a kind of method utilizing soil-solidified-agent to prepare solidified earth, it comprises the following steps:
(1) provide soil-solidified-agent, and described soil-solidified-agent dilute with water is obtained the solution containing soil-solidified-agent, described soil-solidified-agent is road nation ion soil curing compound;
(2) the described solution containing soil-solidified-agent is mixed with soil, obtain compound, wherein, described in the described solution containing soil-solidified-agent, the mass ratio of soil-solidified-agent and described soil is 1:10000 ~ 2:10000, and described soil is the admaic earth in area in Zhejiang; And
(3) described compound is rolled, obtain the solidified earth that degree of compaction is 96% ~ 98%.
Wherein, described in the described solution containing soil-solidified-agent, the mass ratio of soil-solidified-agent and described soil is 1.2:10000 ~ 1.6:10000.
Wherein, described in the described solution containing soil-solidified-agent, the mass ratio of soil-solidified-agent and described soil is 1.4:10000.
Wherein, described soil-solidified-agent is road nation EN-1 ion soil curing compound.
Wherein, described in the described solution containing soil-solidified-agent, the volume ratio of soil-solidified-agent and water is 1:100 ~ 1:400.
Wherein, described in the described solution containing soil-solidified-agent, the volume ratio of soil-solidified-agent and water is 1:300.
Compared with prior art, the method utilizing soil-solidified-agent to prepare solidified earth of the present invention has the following advantages: because soil-solidified-agent has " hydrophilic head " and " hydrophobic tail ", and select the mass ratio of described soil-solidified-agent and soil to be this specific mass ratio of 1:10000 ~ 2:10000, thus the cation generation ion-exchange reactions that can adsorb with most clay particle surface in admaic earth of described soil-solidified-agent, reduce the fixed bed on soil particle surface and the general thickness of diffusion layer, make particle surface thinning in conjunction with moisture film, thus cause the gravitation between clay particle to increase, repulsion reduces, and then impel clay particle to assemble, condense and form larger particle, therefore, solidified earth becomes more closely knit, the mechanical strength of solidified earth improves.In this course, clay mineral lattice structure does not have disintegration and failure.Soil can be obtained the solidified earth of the requirement meeting engineering by the method fast after the process of soil-solidified-agent, and efficiency is higher, also has that energy conservation, cost are lower, advantage to environmental disruption and less pollution, and can meet the needs of engineering construction development.
Because the volume ratio of soil-solidified-agent and water is 1:100 ~ 1:400, the described solution containing soil-solidified-agent is made to have suitable viscosity, can preferably to diffusion inside and the infiltration of soil.
Preferably, described in the described solution containing soil-solidified-agent, the mass ratio of soil-solidified-agent and described soil is 1.2:10000 ~ 1.6:10000.Preferred, described in the described solution containing soil-solidified-agent, the mass ratio of soil-solidified-agent and described soil is 1.4:10000, and now, the index of plasticity of the solidified earth obtained is down to minimum, and unconfined compression strength reaches maximum.
Accompanying drawing explanation
Fig. 1 is the test result (wherein, abscissa soil-solidified-agent volume refers to the mass ratio of soil-solidified-agent and soil) of the index of plasticity of compound under the mass ratio of different soils curing compound and soil.
Fig. 2 is the unconfined compression strength test result (wherein, abscissa soil-solidified-agent volume refers to the mass ratio of soil-solidified-agent and soil) of solidified earth under the mass ratio of different soils curing compound and soil.
The mass ratio that Fig. 3 A to 3G is followed successively by soil-solidified-agent and soil is the stereoscan photograph (multiplication factor is 10000 times) of the solidified earth of 1:10000,1.2:10000,1.4:10000,1.6:10000,1.8:10000,2:10000.
Fig. 4 is the X-ray diffracting spectrum (wherein curve a is the soil of former state, and the mass ratio that curve b to g is corresponding in turn in soil-solidified-agent and soil is 1:10000,1.2:10000,1.4:10000,1.6:10000,1.8:10000,2:10000) of solidified earth under the mass ratio of different soils curing compound and soil.
Fig. 5 is the compound of contrast groups 1 and the 3rd group obtains solidified earth intensity test result with different degree of compaction.
Following specific embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Detailed description of the invention
Below with reference to accompanying drawing, the method utilizing soil-solidified-agent to prepare solidified earth provided by the invention is described further.
The invention provides a kind of method utilizing soil-solidified-agent to prepare solidified earth; The method comprises the following steps:
(1) provide soil-solidified-agent, and described soil-solidified-agent dilute with water is obtained the solution containing soil-solidified-agent, described soil-solidified-agent is road nation ion soil curing compound;
(2) the described solution containing soil-solidified-agent is mixed with soil, obtain compound, wherein, described in the described solution containing soil-solidified-agent, the mass ratio of soil-solidified-agent and described soil is 1:10000 ~ 2:10000, and described soil is the admaic earth in area in Zhejiang; And
(3) described compound is rolled, obtain the solidified earth that degree of compaction is 96% ~ 98%.
Step (1) in, described soil-solidified-agent is commercially available road nation ion soil curing compound.This road nation ion soil curing compound is anionic surfactant.Concrete, described soil-solidified-agent is a kind of sulfonated oil resin, and it is by a kind of organic compound (RSO of sulfonic acid
3h) " hydrophilic head " and one are made up of former molecular " hydrophobic tail " of carbon and hydrogen.Described soil-solidified-agent is soluble in water, dissociation can go out positively charged cation (as Ca in water
2+, Mg
2+, Na
+, K
+deng) and anion (as Cl
-, SO
4 2-, NO
3 -deng).The volume ratio of this soil-solidified-agent and water can be 1:100 ~ 1:400, makes the described solution containing soil-solidified-agent have suitable viscosity on the one hand, can preferably to diffusion inside and the infiltration of soil; On the other hand also conveniently step (2) in get the appropriate solution containing soil-solidified-agent.Preferably, the volume ratio of soil-solidified-agent and water is 1:300, thus this solution containing soil-solidified-agent obtained has best viscosity, to avoid when the concentration of soil-solidified-agent is too low, dissociation cationic quantity not sufficient out causes ion-exchange reactions insufficient, and the effect of reinforcing soil is poor; And when the excessive concentration of soil-solidified-agent, viscosity is comparatively large and diffusion and infiltration in the clay particle time is longer, slows down the situation of job scheduling.In the present invention, the Shi Lu nation EN-1 ion soil curing compound of employing, the volume ratio of this soil-solidified-agent and water is 1:300.
Step (2) in, when the described solution containing soil-solidified-agent mixes with soil, the volume of the described solution containing soil-solidified-agent is determined according to the quality of described soil and the described concentration containing soil-solidified-agent in the solution of soil-solidified-agent, as long as make the mass ratio of soil-solidified-agent and described soil be 1:10000 ~ 2:10000, to ensure the soil-solidified-agent of q.s and the cation generation ion-exchange reactions can adsorbed with most clay particle surface.Concrete, when described soil-solidified-agent is scattered in water, " hydrophilic head " (RSO
3h) there is dissociation and produce [a SO in this part
3]
2-ion, as [SO
3]
2-oxygen atom when combining with the metal cation on clay particle, soil-solidified-agent just occupies a cation vacancy in clay particle surface; Driven the partial cation be adsorbed on clay particle diffusion layer surface away, now soil-solidified-agent is attracted to clay particle surface.In addition, " hydrophilic head " is also by [SO
3]
2-middle sulphur atom is attached on " hydrophobic tail " of molecule afterbody, " hydrophobic tail " of soil-solidified-agent defines an oiliness layer round clay particle surface, " hydrophobic tail " has certain exclusion effect to the water in clay particle surface, and namely soil-solidified-agent has the ability of the thickness in conjunction with moisture film reducing particle surface.Under the acting in conjunction of above-mentioned two kinds of factors, adding of described soil-solidified-agent reduces the fixed bed of clay particle surface and the general thickness of diffusion layer, make particle surface thinning in conjunction with moisture film, thus cause the gravitation between clay particle to increase, repulsion reduces, so impel clay particle to assemble, condensation and form larger particle, therefore, solidified earth becomes more closely knit, and the mechanical strength of solidified earth improves.
Be control group 1 by the soil of former state; And be the 1 to 6 group by the soil adding soil-solidified-agent, wherein the mass ratio of soil-solidified-agent and soil is followed successively by 1:10000,1.2:10000,1.4:10000,1.6:10000,1.8:10000,2:10000.Concrete, the solution containing soil-solidified-agent is spilled in soil, obtains compound after uniform mixing and contain in polybag, in a loose state sealed maintenance 24 hours.Its liquid limit, plastic limit and index of plasticity are tested respectively to the soil of the former state of control group 1 and the compound of 1st ~ 6 groups.Result refers to following table 1 and Fig. 1.
The liquid limit of the soil of the compound that table 1 is 1st ~ 6 groups and control group 1 former state, plastic limit and index of plasticity test result (tell somebody what one's real intentions are middle table 4-5)
By table 1 and Fig. 1, visible, (I) soil is after adding soil-solidified-agent, its liquid limit, plastic limit and index of plasticity have change in various degree, and index of plasticity all decreases, for contrast groups 1, when the mass ratio of soil-solidified-agent and soil is 1.4:10000, namely the 3rd retable sex index declines the most obvious, and compared with control group 1, now index of plasticity reduces 10.8%; The volume of (II) soil-solidified-agent is not more high better, after the mass ratio of soil-solidified-agent and soil is greater than 1.4:10000, not only the 4 to 6 group index of plasticity but also increase; (III), for contrast groups 1, the reduction of the index of plasticity of the 1 to 3 group solidified earth, shows that soil-solidified-agent can effectively reduce the thickness in conjunction with moisture film, and the spacing of clay particle is reduced, and the adhesion between clay particle strengthens.
Further, also prepare with the compound of the soil of the former state of control group 1 and 1st ~ 5 groups the solidified earth that degree of compaction is respectively 96% and 98% respectively, and measure solidified earth 7 days unconfined compression strengths, the results are shown in Table 2 and Fig. 2.
The unconfined compression strength test result (tell somebody what one's real intentions are middle show 4-6) of solidified earth under the mass ratio of table 2 different soils curing compound and soil
From table 2 and Fig. 2, (I) soil is after adding soil-solidified-agent, degree of compaction is 96%, the unconfined compression strength of the solidified earth of 98% is all significantly improved, the wherein unconfined compression strength of degree of compaction to be the unconfined compression strength of the solidified earth of 98% apparently higher than degree of compaction the be solidified earth of 96%, namely, soil-solidified-agent serves solidification effect to soil, increase with degree of compaction, solidification effect is more obvious, simultaneously along with the increase of the volume (i.e. the mass ratio of soil-solidified-agent and soil) of soil-solidified-agent, its unconfined compression strength first increases rear reduction, (II) is when the mass ratio of soil-solidified-agent and soil is 1.4:10000,3rd group of degree of compaction obtained be 98% unconfined compression strength of solidified soil reach maximum value 1.85MPa, improve 20.92% than 7 days unconfined compression strengths of control group 1 under same degree of compaction, and then show that the mass ratio of soil-solidified-agent and soil be 1.4:10000 is optimal value.
Refer to Fig. 3 A, the soil of control group 1 former state is based on the stacked structure of aggregate or granule, and hole is larger; Refer to Fig. 3 B to 3G, after the 1 to 5 group adds soil-solidified-agent, aggregate obviously increases, and hole reduces greatly, and the Cementation Characteristics of surperficial cement is more obvious, and with the contact of the form in face-face closely, structure becomes tightr to clay particle.Wherein, the mass ratio of the 3rd group of soil-solidified-agent and soil is that the Cementation Characteristics of surperficial cement in the solidified earth of 1.4:10000 is the most obvious, and clearly can see clay and form aggregate structure, seldom occur with crumb form, hole reduces.Think: the appearance of cement feature is owing to containing the binding materials such as free iron oxide, silicon, aluminium in admaic earth, after soil-solidified-agent process, different skeleton particle is bonded together by this binding material, form the stacked structure with certain structures join power, gravitation between clay particle is increased, thus make clay particle tightr with the contact of the form in face-face, cause the structure of admaic earth and hole to have greatly changed.
To sum up, more preferably, described in the described solution containing soil-solidified-agent, the mass ratio of soil-solidified-agent and described soil is 1.2:10000 ~ 1.6:10000.Preferred, described in the described solution containing soil-solidified-agent, the mass ratio of soil-solidified-agent and described soil is 1.4:10000, and now, the index of plasticity of the solidified earth obtained is down to minimum, and unconfined compression strength reaches maximum.In addition, the consumption of described soil-solidified-agent is less, thus reduces cost.It should be noted that, described soil refers to dry soil, specifically refers to that water content is the soil of 10% ~ 25%.
Refer to Fig. 4, with the soil of former state (curve a) compared with, after adding soil-solidified-agent, curve b to g overlaps with curve a all substantially, do not occur new diffraction maximum, this illustrates soil not new mineral generation after soil-solidified-agent process, when this also demonstrates soil-solidified-agent and soil interaction further, the cation only adsorbed with clay particle surface produces exchange interaction, but does not destroy original clay mineral lattice structure.
Step (3) in, described compound is rolled, and makes the solidified earth obtained have certain degree of compaction.The condition being 90%, 92%, 94%, 96% and 98% with degree of compaction respectively by the compound of above-mentioned contrast groups 1 and the 3rd group obtains solidified earth, and then carry out intensity test to solidified earth, result refers to Fig. 5.As seen from Figure 5, the solidified earth obtained after adding soil-solidified-agent, when degree of compaction is 96% ~ 98%, unconfined compression strength value is higher, illustrates that this degree of compaction is that the solidification of 96% ~ 98% time described soil-solidified-agent is more obvious.
Compared with prior art, the method utilizing soil-solidified-agent to prepare solidified earth of the present invention has the following advantages: because soil-solidified-agent has " hydrophilic head " and " hydrophobic tail ", and select the mass ratio of described soil-solidified-agent and soil to be this specific mass ratio of 1:10000 ~ 2:10000, thus the cation generation ion-exchange reactions that can adsorb with most clay particle surface in admaic earth of described soil-solidified-agent, reduce the fixed bed on soil particle surface and the general thickness of diffusion layer, make particle surface thinning in conjunction with moisture film, thus cause the gravitation between clay particle to increase, repulsion reduces, and then impel clay particle to assemble, condense and form larger particle, therefore, solidified earth becomes more closely knit, the mechanical strength of solidified earth improves.In this course, clay mineral lattice structure does not have disintegration and failure.Soil can be obtained the solidified earth of the requirement meeting engineering by the method fast after the process of soil-solidified-agent, and efficiency is higher, also has that energy conservation, cost are lower, advantage to environmental disruption and less pollution, and can meet the needs of engineering construction development.
In addition, those skilled in the art also can do other changes in spirit of the present invention, and these changes done according to the present invention's spirit, all should be included in the present invention's scope required for protection certainly.
Claims (6)
1. utilize soil-solidified-agent to prepare a method for solidified earth, it is characterized in that, it comprises the following steps:
(1) provide soil-solidified-agent, and described soil-solidified-agent dilute with water is obtained the solution containing soil-solidified-agent, described soil-solidified-agent is road nation ion soil curing compound;
(2) the described solution containing soil-solidified-agent is mixed with soil, obtain compound, wherein, described in the described solution containing soil-solidified-agent, the mass ratio of soil-solidified-agent and described soil is 1:10000 ~ 2:10000, and described soil is the admaic earth in area in Zhejiang; And
(3) described compound is rolled, obtain the solidified earth that degree of compaction is 96% ~ 98%.
2. utilize soil-solidified-agent to prepare the method for solidified earth as claimed in claim 1, it is characterized in that, described in the described solution containing soil-solidified-agent, the mass ratio of soil-solidified-agent and described soil is 1.2:10000 ~ 1.6:10000.
3. utilize soil-solidified-agent to prepare the method for solidified earth as claimed in claim 2, described in the described solution containing soil-solidified-agent, the mass ratio of soil-solidified-agent and described soil is 1.4:10000.
4. utilize soil-solidified-agent to prepare the method for solidified earth as claimed in claim 1, it is characterized in that, described soil-solidified-agent is road nation EN-1 ion soil curing compound.
5. utilize soil-solidified-agent to prepare the method for solidified earth as claimed in claim 1, it is characterized in that, described in the described solution containing soil-solidified-agent, the volume ratio of soil-solidified-agent and water is 1:100 ~ 1:400.
6. utilize soil-solidified-agent to prepare the method for solidified earth as claimed in claim 5, it is characterized in that, described in the described solution containing soil-solidified-agent, the volume ratio of soil-solidified-agent and water is 1:300.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105367010A (en) * | 2015-10-30 | 2016-03-02 | 郑卫忠 | Hardening agent for road and roadbed hardening method |
| CN105442409A (en) * | 2015-12-31 | 2016-03-30 | 中城建第五工程局集团有限公司 | Waterborne epoxy stabilized soil, application thereof and stabilized soil road surface |
| CN110577392A (en) * | 2019-10-23 | 2019-12-17 | 中南大学 | Soil curing agent for high liquid limit soft soil roadbed |
| CN113652239A (en) * | 2021-08-10 | 2021-11-16 | 中建三局第二建设工程有限责任公司 | Special curing agent for tropical desert soil and use method thereof |
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| US5824725A (en) * | 1995-04-03 | 1998-10-20 | King Fahd University Of Petroleum And Minerals Research Institute | Method and composition for stabilizing soil and process for making the same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105367010A (en) * | 2015-10-30 | 2016-03-02 | 郑卫忠 | Hardening agent for road and roadbed hardening method |
| CN105442409A (en) * | 2015-12-31 | 2016-03-30 | 中城建第五工程局集团有限公司 | Waterborne epoxy stabilized soil, application thereof and stabilized soil road surface |
| CN110577392A (en) * | 2019-10-23 | 2019-12-17 | 中南大学 | Soil curing agent for high liquid limit soft soil roadbed |
| CN113652239A (en) * | 2021-08-10 | 2021-11-16 | 中建三局第二建设工程有限责任公司 | Special curing agent for tropical desert soil and use method thereof |
| CN113652239B (en) * | 2021-08-10 | 2022-07-26 | 中建三局第二建设工程有限责任公司 | Special curing agent for tropical desert soil and use method thereof |
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