CN102703086A - Inorganic soil curing agent and preparation method thereof - Google Patents

Inorganic soil curing agent and preparation method thereof Download PDF

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Publication number
CN102703086A
CN102703086A CN201210157819XA CN201210157819A CN102703086A CN 102703086 A CN102703086 A CN 102703086A CN 201210157819X A CN201210157819X A CN 201210157819XA CN 201210157819 A CN201210157819 A CN 201210157819A CN 102703086 A CN102703086 A CN 102703086A
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soil
curing agent
agent
solidified
preparation
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CN201210157819XA
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丁毅
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Shenyang University
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Shenyang University
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Abstract

The invention relates to an inorganic soil curing agent and a preparation method thereof, relating to soil curing agents for building and a preparation method thereof; the curing agent comprises 28-45% of cement clinker, 30-45% of two-grade or more than two-grade coal ash, 10-15% of slag, 12-15% of quicklime, 1-3% of ardealite and 2% of alkali activator; the preparation method comprises the following steps: transporting raw materials to a ball mill, grinding the raw materials for 12-15 minutes; stirring evenly so as to form gray powder material, wherein a specific surface area is 280-300m<2>/kg; sieve residue is not more than 4% through a square hole screen of 80 microns; mixing 6-15% of the soil curing agent with loosened soil in a construction procedure; and grinding under condition of a best moisture content of soil, and obtaining a product after a conservation period. According to the invention, the inorganic soil curing agent can be mixed with material prepared by mixing soil, garbage, and industrial waste through methods of regulating curing agent component proportion, dosage and the like, and is suitable for the inorganic soil curing agent of various soil textures.

Description

A kind of mineral-type soil-solidified-agent and preparation method thereof
Technical field
The present invention relates to a kind of soil-solidified-agent for building and preparation method thereof, particularly relate to a kind of mineral-type soil-solidified-agent and preparation method thereof.
Background technology
The used traditional technology in road basis is to use the method for cement Stability Gravel.Increasing along with the expanding economy and the volume of traffic, Road construction has got into the stage of a fast development.The road-making material that adapts to engineering demand is also well sold and in short supply thereupon.In recent years, this builds the road sandstone and the important natural resource of building a large amount of needs day by day reduces, and some area is near exhausted.Particularly in the improvement project of old road, the old soil on former road is transported outward, and the long from afar distance of the sandstone on new road is transported to the scene, and construction costs greatly improves thus.Simultaneously, the exploitation of sandstone also brings a series of problems such as vegetation minimizing, soil erosion, environmental degradation.Therefore, press for novel material and new technology and replaced original material and technology.
Soil-solidified-agent is the admixture that in soil, adds; Make it a series of physical-chemical reactions to take place with soil; Thereby reach the physico-mechanical properties that improves soil; Improve the engineering properties of soil, reduce the water sensitivity and the water stability that improves soil of soil, make soil become the purpose of firm persistent solidified earth.The patent of research of domestic all kinds of solidifying agent in recent years and relevant soil-solidified-agent increases gradually; Wherein the mineral-type soil-solidified-agent existing several, but because of its starting material source and the difference formed, most of soils solidifying agent cost is higher; And compatibility has certain restriction; Particularly for loose aleuritic texture soil, solidification effect is undesirable, has influenced promotion and application.
Summary of the invention
The object of the present invention is to provide a kind of mineral-type soil-solidified-agent and preparation method thereof; Through means such as adjustment curing agent component ratio and volumes; The performance of control solidified earth, the material mixing after can stirring with earth, rubbish, trade waste is cured processing; The mineral-type soil-solidified-agent that is fit to multiple soil property is to satisfy the needs of road and foundation works.
The objective of the invention is to realize through following technical scheme:
A kind of mineral-type soil-solidified-agent, the component of this solidifying agent and weight ratio are:
Cement clinker: 28%~45%;
The above flyash of secondary or secondary: 30%~45%;
Slag: 10%~15%;
Unslaked lime: 12%~15%;
Phosphogypsum: 1%~3%;
Alkali-activator: 2;
The above-mentioned raw materials summation is 100%.
A kind of preparation method of mineral-type soil-solidified-agent, its said method comprises following process:
Starting material are transported in the ball mill, grind 12-15min, and mix to evenly, form the grey dusty material, and specific surface area is 280-300 m2/kg, and screen over-size is no more than 4 % behind the 80 μ m square hole sieves excessively;
During construction, the cleaning roadbed, behind the smooth roadbed, with the above-mentioned soil-solidified-agent of 6%-15% with loosen the soil mixing, stir repeatedly until uniformity, roll milling forming under the soil optimum moisture content reaches degree of compactness>93 requirement, after preserving period, get final product.
Advantage of the present invention and effect are:
1, the present invention is applicable to multiple soil property.Use solidifying agent of the present invention, silty soil, cohesive soil (low liquid limit clay, middle liquid limit clay), sandy soil (river sand, gravel, weathering sand) etc. can successfully solidify (corruption plant matter content surpass 10% soil and sour earth should not use).Through means such as adjustment each component proportions of solidifying agent and volumes, can control the performance of solidified earth easily, make it to be used for the road basis of different grades.Material mixing after the present invention can also stir with earth, rubbish, trade waste is cured processing, or utilizes its principle of solidification that objectionable impurities is carried out effective closure.
2, the present invention is with low cost, and is economical and practical.Soil-solidified-agent involved in the present invention adopts a large amount of industrial residues and domestic cement industry starting material commonly used as raw material; Chemical ingredients is simple, rich material resources, and production technique and required machinery are easy; Equipment that cement mill capable of using is ready-made and processes production, so price comparison is cheap.When application the present invention constructs, need not handle surflaes and carrying and use novel material, suit measures to local conditions; Gather materials on the spot; Practice thrift ample resources and trucking costs, only this item just can reduce construction costs greatly; Particularly overhaul, have the ideal result of use in the regeneration of area construction of no sandstone and outmoded road.
3, products solidifying of the present invention is effective.As road basement material, performance satisfies request for utilization with Stabilized Soil of the present invention.Soil property forms plate body after solidifying, intensity rises appreciably with increasing the length of time, and later strength is very high and do not receive freezing and pyritous influences, and scientificlly and effectively prolongs the road surface life cycle, reduces maintenance cost.This specific character just is being fit to the needs of highway communication construction development and various civil workss.
4. the present invention helps environment protection.This solidifying agent does not use harmful additive without exception, does not have pollution in production process and the application process.Can sharply not generate heat when water and reaction, high hot dust not occur, environment is not had any detrimentally affect.Transport, take care of identical with cement, safe and reliable with treatment process.The solidifying agent raw material utilizes the water-granulated slag of power plant's waste and Iron And Steel Plant in a large number, has reduced environmental pollution, can practice thrift a large amount of gravel resources simultaneously, has avoided the destruction Of resources, has the meaning of environmental protection.
Embodiment
Embodiment 1:
Soil-solidified-agent of the present invention, its component and weight ratio are:
Cement clinker: 39%, the above flyash of secondary or secondary: 35%, slag: 10%, unslaked lime: 12%, dihydrate gypsum: 2%, alkali-activator 2%, the above-mentioned raw materials summation is 100%.
Embodiment 2: soil-solidified-agent of the present invention, and its its component and weight ratio are:
Cement clinker: 34%, the above flyash of secondary or secondary: 35%, slag: 15%, unslaked lime: 12%, dihydrate gypsum: 2%, alkali-activator 2%, the above-mentioned raw materials summation is 100%.
Embodiment 3: soil-solidified-agent of the present invention, and its component and weight ratio are:
Cement clinker: 40%, the above flyash of secondary or secondary: 30%, slag: 15%, unslaked lime: 12%, phosphogypsum: 3%, the above-mentioned raw materials summation is 100%.
Embodiment 4: soil-solidified-agent of the present invention, and its component and weight ratio are:
Cement clinker: 32.5%, the above flyash of secondary or secondary: 40%, slag: 10.5%, unslaked lime: 13%, phosphogypsum: 2.5%, alkali-activator 1.5%, the above-mentioned raw materials summation is 100%.
The principle of solidification of soil-solidified-agent of the present invention:
The present invention adopts the composite soil solidifying agent of inorganic materials such as cement clinker and flyash, lime combination, can be summed up as two big effects to the consolidation effect of soil, i.e. plural gel effect and filling effect.The structure of solidified earth is constituted by the cementing properties hydrate wraps up binder soil particle and cementing properties or swelling property hydrate filling pore, and hole is filled, and gain in strength plays an important role to solidified earth.
Cement clinker is met water generation hydration reaction and is generated C-S-H and CH, and C-S-H provides early strength; Activity excitant in CH and the solidifying agent excites the octahedral activity of silica hexahedron, silica in the vitreum and the soil body in the flyash jointly, generates hydrated calcium silicate and drated calcium aluminate, has gelling ability.Solidify material particle and soil particle are filled each other, form the closestpacking structure, make the soil solidification system form the certainly tight state of thin sight level; Through the overlap joint of hydrated product, produce strong " micro-aggregate filling " and " skeleton support " effect between soil and the hydrated product, strengthened the intensity of solidified earth system.Because this reaction is what continue to take place, therefore, the intensity of the agent solidified system that is cured is in time and increases progressively trend.
The chemical reaction that relates generally to has:
Ca?(?O?H)2+nH2O→Ca?(OH)2·nH2O
X Ca (O H) 2+S,iO2 ten mH 2O → xCaOSiO2 (x+m) H2O
y?Ca?(?O?H)2+Al2O3+mH2O→yCaO.?Al2O3·?(y+m)?H2O
Ca2++?2?O?H-→Ca?(?O?H)2
2C3S?+?6H2O→?Ca·2?SiO·?3?H2O+3?Ca?(?O?H)2
Water-granulated slag is the waste residue of iron work, and the essential mineral composition is Dicalcium Phosphate (Feed Grade), tricalcium aluminate, and main chemical compositions is SiO2 (about 37.28%), CaO (about 39.2), Al2O3 (about 12. 77).Hydrated product after slag is excited also generates HS, insoluble zeolite minerals except the cementing properties C-S-H gel identical with silicate.The trickle crystal of these compounds has very high intensity, and is not only very stable on thermodynamics, and is the material that the utmost point is insoluble in water.Be spiked in the solidifying agent, both can have served as and gather materials, slag can be participated in the intensity structure of consolidated earth mass again in hydration process.
The expansile hydrate that plays filling effect in the solidified earth mainly is that aquation calcium sulphoaluminate (3CaOA 12033 CaSO4. 32H20) is an ettringite.Gypsum can generate the swelling property material, plays the filling pore effect.
Add alkali-activator in the solidifying agent, can effectively excite the lateral reactivity of flyash, slag and clay mineral, quicken pozzolanic reaction, improve the technical feature of soil.Its concrete mode of action can have three kinds: one provides effective hydroxide ion, forms stronger alkaline environment, impels active SiO2, Al2O3 corrosion, thereby improves the speed of pozzolanic reaction; Two provide stronger alkali, participate in reaction directly, accelerate the glued generation that produces of basic volcanical ash; It three provides acid ion, and can with the CA2+.Mg2+ ionization, directly generate other cementing material.
Test-results:
To different soil properties, the ratio of each component of soil-solidified-agent adjustment of the present invention's design, and adopt different volumes, carried out repeatedly unconfined compressive strenght test respectively.
Method: test specimen is φ 10 * 10cm.Test specimen is hydrostatic profile under the condition of optimum moisture content and maximum dry density; Packing into after the demoulding seals in the plastics bag, places the indoor health of normal curing 6 days or 27 days, soaks after 1 day; Measure ultimate compression strength with the pavement material intensity tester, average as test result.
Test-results is as shown in table 1.Wherein A1~A4 is the different components of solidifying agent in the previous embodiment, and B, C, D, E are respectively the soil sample of silt, clay, sand, mountain skin soil, and F is the composite soil of silt and clay.
Table 1 unconfined compression strength test result
Test-results shows:
(1) solidification effect of solidifying agent is relevant with soil property.The solidifying agent of same sample ingredient, same volume, the granulometric composition of original soil is different with chemical ingredients, and the intensity difference is very big.Under the same terms, seven days unconfined compression strengths of mountain skin soil and clay, silt differ about three times.
(2) in existing trial stretch, solidified earth intensity is directly proportional with the volume of solidifying agent.
(3) solidified earth intensity is relevant with the length of time.The 7d unconfined compression strength is between 0.8-3.27MPa, and reason is that the curing reaction speed of flyash and lime is comparatively slow.But test result shows, even early strength about 0.8MPa, the sustainable growth all the time of the later strength of test specimen, 90d all reaches more than the 2MPa, can satisfy the needs of villages and small towns road.
Use soil-solidified-agent construction point of the present invention:
(1) confirm local soil property type through experiment, and definite optimum moisture content and maximum dry density.
(2), confirm the incorporation of every square metre of solidifying agent according to the design thickness of category of roads and requirement of strength and soil type, roadbase.Intensity obviously improves with the increase of solidifying agent volume.For road in the village of rural area, volume 8%-10% can meet the demands.
(3) behind smooth roadbed, the ratio of solidifying agent in 6%-15% is spread on the subgrade soils of scarifying.
(4) be stirred to repeatedly evenly with road ripper or rotovator.
(5) spread water, continue to stir, reach optimum moisture content gradually.
(6) roll milling forming reaches the degree of compactness requirement.
(7) maintenance is seven days.With the prolongation of curing time, the ultimate compression strength of solidified earth constantly increases.
(8) lay surface layer.

Claims (2)

1. a mineral-type soil-solidified-agent is characterized in that, the component of this solidifying agent and weight ratio are:
Cement clinker: 28%~45%;
The above flyash of secondary or secondary: 30%~45%;
Slag: 10%~15%;
Unslaked lime: 12%~15%;
Phosphogypsum: 1%~3%;
Alkali-activator: 2;
The above-mentioned raw materials summation is 100%.
2. the preparation method of a mineral-type soil-solidified-agent is characterized in that, said method comprises following process:
Starting material are transported in the ball mill, grind 12-15min, and mix to evenly, form the grey dusty material, and specific surface area is 280-300 m2/kg, and screen over-size is no more than 4 % behind the 80 μ m square hole sieves excessively;
During construction, the cleaning roadbed, behind the smooth roadbed, with the above-mentioned soil-solidified-agent of 6%-15% with loosen the soil mixing, stir repeatedly until uniformity, roll milling forming under the soil optimum moisture content reaches degree of compactness>93 requirement, after preserving period, get final product.
CN201210157819XA 2012-05-21 2012-05-21 Inorganic soil curing agent and preparation method thereof Pending CN102703086A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Publication Number Publication Date
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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103553375A (en) * 2013-09-29 2014-02-05 南京工业大学 Composite soil solidifying agent, and preparation and application thereof
CN103774516A (en) * 2014-02-20 2014-05-07 坤泽科技连云港有限公司 Subbase course stabilizing treatment method for soft foundation excavation roadbed
CN103771786A (en) * 2014-01-23 2014-05-07 上海雅乐市政实业有限公司 Rapidly hardening mixture for road base and using method thereof
CN103848582A (en) * 2012-12-04 2014-06-11 浙江大学宁波理工学院 Gelled material for soil solidification
CN103896541A (en) * 2014-03-03 2014-07-02 福建省建筑工程质量检测中心有限公司 Soil curing agent
CN103965918A (en) * 2014-04-22 2014-08-06 江苏工大伟业新材料有限公司 Curing agent for water quenching manganese slag mollisol
CN105778923A (en) * 2016-04-14 2016-07-20 吉林中路新材料有限责任公司 Soil stabilizer and preparation method thereof
CN106284294A (en) * 2016-08-08 2017-01-04 上海强劲地基工程股份有限公司 A kind of weak soil strengthens curing
CN106939165A (en) * 2017-02-10 2017-07-11 上海强劲地基工程股份有限公司 A kind of soil body curing agent and its preparation method and its gunnite method
CN107117916A (en) * 2017-03-23 2017-09-01 广东省建筑科学研究院集团股份有限公司 A kind of powder soil solidification additive for roadbase
CN107117915A (en) * 2017-03-23 2017-09-01 广东省建筑科学研究院集团股份有限公司 A kind of powder soil solidification additive for being used to handle the remaining body refuse soil of building
CN107265970A (en) * 2017-06-01 2017-10-20 上海勘测设计研究院有限公司 Natural levee bank protection soil-solidified-agent and its preparation method and application
CN107602004A (en) * 2017-11-06 2018-01-19 安宁兴固环保科技有限公司 A kind of multi-element, inorganic composite granule soil solidification additive
CN109294594A (en) * 2018-11-09 2019-02-01 西南科技大学城市学院 A kind of silty soil modifying agent and its application in silty soil improvement
CN110078325A (en) * 2019-05-06 2019-08-02 广东水电二局股份有限公司 A kind of curing agent and the preparation method and application thereof for Silty soft foundation
CN111101417A (en) * 2020-01-07 2020-05-05 大庆市达盛井下作业技术服务有限公司 Soil for road paving and method for paving road by using same
CN113136213A (en) * 2021-04-22 2021-07-20 河南省交通规划设计研究院股份有限公司 Soil stabilizer prepared from bauxite tailings

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
丁毅: "《土壤固化及其应用》", 30 June 2009, 中国大地出版社 *

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103848582A (en) * 2012-12-04 2014-06-11 浙江大学宁波理工学院 Gelled material for soil solidification
CN103848582B (en) * 2012-12-04 2015-09-09 浙江大学宁波理工学院 The gelling material of soil solidification
CN103553375B (en) * 2013-09-29 2016-06-01 南京工业大学 A kind of combined soil solidifying agent and Synthesis and applications thereof
CN103553375A (en) * 2013-09-29 2014-02-05 南京工业大学 Composite soil solidifying agent, and preparation and application thereof
CN103771786A (en) * 2014-01-23 2014-05-07 上海雅乐市政实业有限公司 Rapidly hardening mixture for road base and using method thereof
CN103771786B (en) * 2014-01-23 2015-08-19 上海雅乐市政实业有限公司 A kind of fast rigid roadbase compound and using method thereof
CN103774516B (en) * 2014-02-20 2016-08-10 坤泽科技连云港有限公司 The underlayment stabilized treatment method of soft base cut subgrade
CN103774516A (en) * 2014-02-20 2014-05-07 坤泽科技连云港有限公司 Subbase course stabilizing treatment method for soft foundation excavation roadbed
CN103896541A (en) * 2014-03-03 2014-07-02 福建省建筑工程质量检测中心有限公司 Soil curing agent
CN103896541B (en) * 2014-03-03 2016-06-22 福建省建筑工程质量检测中心有限公司 A kind of soil-solidified-agent
CN103965918A (en) * 2014-04-22 2014-08-06 江苏工大伟业新材料有限公司 Curing agent for water quenching manganese slag mollisol
CN105778923A (en) * 2016-04-14 2016-07-20 吉林中路新材料有限责任公司 Soil stabilizer and preparation method thereof
CN106284294A (en) * 2016-08-08 2017-01-04 上海强劲地基工程股份有限公司 A kind of weak soil strengthens curing
CN106939165A (en) * 2017-02-10 2017-07-11 上海强劲地基工程股份有限公司 A kind of soil body curing agent and its preparation method and its gunnite method
CN107117916A (en) * 2017-03-23 2017-09-01 广东省建筑科学研究院集团股份有限公司 A kind of powder soil solidification additive for roadbase
CN107117915A (en) * 2017-03-23 2017-09-01 广东省建筑科学研究院集团股份有限公司 A kind of powder soil solidification additive for being used to handle the remaining body refuse soil of building
CN107265970A (en) * 2017-06-01 2017-10-20 上海勘测设计研究院有限公司 Natural levee bank protection soil-solidified-agent and its preparation method and application
CN107602004A (en) * 2017-11-06 2018-01-19 安宁兴固环保科技有限公司 A kind of multi-element, inorganic composite granule soil solidification additive
CN109294594A (en) * 2018-11-09 2019-02-01 西南科技大学城市学院 A kind of silty soil modifying agent and its application in silty soil improvement
CN110078325A (en) * 2019-05-06 2019-08-02 广东水电二局股份有限公司 A kind of curing agent and the preparation method and application thereof for Silty soft foundation
CN111101417A (en) * 2020-01-07 2020-05-05 大庆市达盛井下作业技术服务有限公司 Soil for road paving and method for paving road by using same
CN113136213A (en) * 2021-04-22 2021-07-20 河南省交通规划设计研究院股份有限公司 Soil stabilizer prepared from bauxite tailings

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Application publication date: 20121003