CN111072339A - Silt composite curing agent and silt curing method - Google Patents
Silt composite curing agent and silt curing method Download PDFInfo
- Publication number
- CN111072339A CN111072339A CN201911199254.XA CN201911199254A CN111072339A CN 111072339 A CN111072339 A CN 111072339A CN 201911199254 A CN201911199254 A CN 201911199254A CN 111072339 A CN111072339 A CN 111072339A
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- Prior art keywords
- silt
- curing agent
- cement
- composite curing
- water
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/08—Slag cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a silt composite curing agent and a silt curing method, and belongs to the field of road engineering. The silt composite curing agent is prepared by mixing high-molecular emulsion and cement in a specific ratio. Compared with the prior art, the silt composite curing agent can greatly improve the silt curing strength and the water stability, and has good popularization and application values.
Description
Technical Field
The invention relates to the field of road engineering, and particularly provides a silt composite curing agent and a silt curing method.
Background
China, the eastern Henan, the northern Anhui, the northern Jiangsu and the southwest Shandong belong to the yellow pan region, and a large amount of yellow river silt is deposited in the regions. The silt has special engineering properties, generally more than 70 percent of particle groups are powder particles and fine sand particles, the specific surface area is small, the capillary phenomenon is prominent, the silt has the pseudoplastic characteristic, the silt with different causes has different physical and mechanical properties, the structure is poor, and the liquefaction phenomenon is easy to occur under the action of dynamic load. Due to the special physical and mechanical properties, the stability of silt in road engineering is always a problem which is difficult to solve.
Since the last century, the research on the stability of low liquid limit sandy silt of the yellow river alluvial plain by scientific research personnel has not been interrupted, an effective solution is not provided, and the silt stabilization is carried out by adopting an inorganic cementing material and a curing agent, and the respective limitations are realized. The powdered soil is almost composed of primary mineral powder, has poor plasticity, less active SiO2 and Al2O3 components and poor gradation, and the amount of solidified aggregates generated by the reaction of lime and soil is small, so the early and later strength of the powdered soil is low, and the water and frost resistance is poor. Due to poor gradation, the filling and cementation of cement cannot be fully exerted; and the silt is few, the dissolution of active components is little, and the cement soil system has little calcium silicate hydrate or calcium aluminum silicate cement which is generated by exciting the soil, so the cementing effect on the soil is poor, and the strength is not obviously improved.
A large number of engineering practices prove that single externally-doped and simple re-doped stable silt exposes more problems, the actual engineering requirements are difficult to meet, the problems are mainly reflected in the problems of poor early strength, large shrinkage, easiness in cracking, poor stability (water stability, frost resistance and thermal stability) and the like, and the problems are more prominent particularly in silt areas.
Because of the particularity of the silt, the stability of the inorganic material alone causes difficulty in molding in the test, and the inorganic material is directly destroyed during demolding, which is an apparent result of poor structure of the silt.
The applicant disclosed in patent document No. CN107285694A a method for solidifying silty soil by compounding emulsified asphalt. The method takes the emulsified asphalt, the cement and the silty soil as raw materials, can realize an available pavement material, and still has a larger space for improving the processing technology, the production cost, the strength of the prepared pavement material, the water stability, the freezing resistance and other properties.
Disclosure of Invention
The invention provides a silt composite curing agent which can greatly improve the silt curing strength and the water stability aiming at the problems of silt forming difficulty and poor strength and water stability.
A further technical task of the present invention is to provide a silt curing method.
The technical scheme adopted by the invention for solving the technical problems is as follows: the silt composite curing agent is prepared from the following raw materials in parts by weight:
5-15 parts of high-molecular emulsion;
1-5 parts of cement.
The preferable weight ratio of the raw materials is as follows:
10-15 parts of high-molecular emulsion;
2-4 parts of cement.
The polymer emulsion is preferably cationic SBR latex and/or cationic SBS latex. The mass percentage of the high molecular substances (SBR and SBS) in the high molecular emulsion is 15-30%. When a commercially available latex product with high solid content is adopted, the latex is diluted by purified water according to the solid content until the solid content is 15-30%.
The cement is portland cement, such as ordinary portland cement, portland slag cement, portland pozzolan cement or portland fly ash cement. The cement strength is preferably p.o32.5 or p.o42.5.
The silt curing method is characterized in that when the curing agent is used for curing silt, the curing agent and the silt are uniformly mixed. The weight ratio of the polymer emulsion, cement and silt is preferably (5-15): 1-5): 80-95, and the optimal weight ratio is (10-15): 2-4): 90-95.
Preferably, a proper amount of additional water can be added in the mixing process of the polymer emulsion, the cement and the silt.
The dosage of the external water is calculated by subtracting the water amount in the polymer emulsion from the optimal water content, and the optimal water content is obtained by a compaction test of soil.
When the indoor experiment is carried out, the dried silt is preferably adopted, and the drying procedure is not required to be added in the actual construction process.
Compared with the prior art, the silt composite curing agent has the following outstanding beneficial effects:
firstly, high molecular substances in the high molecular emulsion can quickly bond discrete particles in the silt, so that the initial forming and the initial strength of the silt are guaranteed;
and (II) by utilizing the physical bonding of the high-molecular latex and the hydration gelation of low-dose cement, the unconfined strength of the silt in the later 7 days is improved, and the water stability is improved. The curing effect is better than that of the existing single inorganic curing agent;
and thirdly, the silt solidified by the curing agent has high strength, large water stability coefficient and excellent wear resistance, and can be widely applied to simple pavement laying in rural areas.
Detailed Description
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.
Unless otherwise specified, the contents of the respective components used below are weight percent contents.
The first embodiment is as follows:
curing the silt by using SBR latex with 20 percent of solid content and ordinary portland cement as a composite curing agent.
The weight ratio of SBR latex, ordinary portland cement, silt and external water is 10: 3: 95: 4. wherein the SBR latex is cation SBR latex produced by Shandong Yinyuan scientific and technological company, the solid content is 40 percent, and the SBR latex is diluted by purified water to be 20 percent and then used.
Fully mixing the dried soil and cement, adding water and SBR latex, fully and uniformly mixing, and molding a test piece according to the compaction degree of 95%, wherein the test piece is smoothly demoulded without damage; bagging and maintaining for 7 days at room temperature, and then carrying out an unconfined compressive strength test to obtain unconfined compressive strength of 1.011MPa and a water stability coefficient of 0.414.
Example two:
the raw materials of the curing agent and the forming method of the test piece are the same as those in the first embodiment, and the differences are that the weight ratio of SBR latex, ordinary portland cement, silt and externally added water is 12: 3: 95: 3.
the test piece is smoothly demoulded without damage; bagging and maintaining for 7 days at room temperature, and then carrying out an unconfined compressive strength test to obtain unconfined compressive strength of 1.167MPa and a water stability coefficient of 0.451.
Example three:
the raw materials of the curing agent and the forming method of the test piece are the same as those in the first embodiment, and the differences are that the weight ratio of SBR latex, ordinary portland cement, silt and externally added water is 14: 3: 95: 2.
the test piece is smoothly demoulded without damage; bagging and maintaining for 7 days at room temperature, and then carrying out an unconfined compressive strength test to obtain unconfined compressive strength of 1.029MPa and a water stability coefficient of 0.630.
Example four:
the raw materials of the curing agent and the forming method of the test piece are the same as those in the first embodiment, and the differences are that the weight ratio of SBR latex, ordinary portland cement, silt and externally added water is 14: 3: 90: 2.
the test piece is smoothly demoulded without damage; bagging and maintaining for 7 days at room temperature, and then carrying out an unconfined compressive strength test to obtain unconfined compressive strength of 1.014 and a water stability coefficient of 0.647.
Example five:
the SBS latex with the solid content of 30 percent and the ordinary Portland cement are used as composite curing agents to cure the silt.
The weight ratio of SBS latex, common silicate cement, silt and external water is 14: 3: 93: 6. the SBS latex is cation SBS latex produced by Shandong Dashan road and bridge company, the solid content is 50%, and the SBS latex is diluted by purified water until the solid content is 30% and then used.
Fully mixing the dried soil and cement, adding water and SBS latex, fully and uniformly mixing, and molding a test piece according to 95% compactness, wherein the test piece is smoothly demoulded without damage; bagging and maintaining for 7 days at room temperature, and then carrying out an unconfined compressive strength test to obtain the unconfined compressive strength of 1.132MPa and the water stability coefficient of 0.708.
The silt curing method of the first to fifth embodiments can obviously increase the curing strength of silt, and the strength is suitable for strength standards of base courses and sub-base courses of various highways through testing and determination of unconfined compressive strength.
The above-described embodiments are merely preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.
Claims (9)
1. The silt composite curing agent is characterized by being prepared from the following raw materials in parts by weight:
5-15 parts of high-molecular emulsion;
1-5 parts of cement.
2. The silt composite curing agent according to claim 1, wherein the weight ratio of the raw materials is as follows:
10-15 parts of high-molecular emulsion;
2-4 parts of cement.
3. The silt composite curing agent according to claim 1 or 2, wherein: the polymer emulsion is cation SBR latex and/or cation SBS latex.
4. The silt composite curing agent according to claim 3, wherein: the mass percentage of the high molecular substance in the high molecular emulsion is 15-30%.
5. The silt composite curing agent according to claim 1 or 2, wherein: the cement is portland cement.
6. The silt composite curing agent according to claim 5, wherein: the cement strength is P.O32.5 or P.O42.5.
7. The silt curing method is characterized by comprising the following steps: the curing agent of claim 1 is used to cure silt, and the weight ratio of the polymer emulsion, cement and silt is (5-15): (1-5): (80-95).
8. The silt curing method according to claim 7, wherein: proper amount of water is added during the mixing process of the polymer emulsion, the cement and the silt.
9. The silt curing method according to claim 8, wherein: the dosage of the external water is calculated by subtracting the water amount in the polymer emulsion from the optimal water content, and the optimal water content is obtained by a compaction test of soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911199254.XA CN111072339B (en) | 2019-11-29 | 2019-11-29 | Silt composite curing agent and silt curing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911199254.XA CN111072339B (en) | 2019-11-29 | 2019-11-29 | Silt composite curing agent and silt curing method |
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| Publication Number | Publication Date |
|---|---|
| CN111072339A true CN111072339A (en) | 2020-04-28 |
| CN111072339B CN111072339B (en) | 2023-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911199254.XA Active CN111072339B (en) | 2019-11-29 | 2019-11-29 | Silt composite curing agent and silt curing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112456918A (en) * | 2020-12-11 | 2021-03-09 | 山东京博石油化工有限公司 | Silt curing material and silt curing method |
| CN114772878A (en) * | 2022-04-05 | 2022-07-22 | 浙江华东工程建设管理有限公司 | Rapid curing agent for pipe-jacking construction slurry and rapid curing method |
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| TW201020224A (en) * | 2008-11-21 | 2010-06-01 | Techom Technology Co Ltd | Construction materials containing the modified soil |
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| CN104818027A (en) * | 2015-03-27 | 2015-08-05 | 孙海军 | Curing agent for silt subgrade |
| CN105419815A (en) * | 2015-12-29 | 2016-03-23 | 吕贵松 | High-molecular soil curing agent |
| CN106278023A (en) * | 2016-08-09 | 2017-01-04 | 甘肃省公路管理局 | A kind of collapsible loess subgrade reinforcement material and preparation method and application |
| CN110143800A (en) * | 2019-06-10 | 2019-08-20 | 广西大学 | A kind of silt modification method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101080479A (en) * | 2004-12-15 | 2007-11-28 | 瓦克聚合系统两合公司 | Process for the stabilization of dusting surfaces |
| TW201020224A (en) * | 2008-11-21 | 2010-06-01 | Techom Technology Co Ltd | Construction materials containing the modified soil |
| US20120063845A1 (en) * | 2009-03-31 | 2012-03-15 | Midwest Industrial Supply, Inc. | Method and composition for modifying soil and dust control |
| CN102211914A (en) * | 2011-03-15 | 2011-10-12 | 武汉广益工程咨询有限公司 | Tough road surface base layer material solidifying agent and preparation method thereof |
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| CN105419815A (en) * | 2015-12-29 | 2016-03-23 | 吕贵松 | High-molecular soil curing agent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112456918A (en) * | 2020-12-11 | 2021-03-09 | 山东京博石油化工有限公司 | Silt curing material and silt curing method |
| CN114772878A (en) * | 2022-04-05 | 2022-07-22 | 浙江华东工程建设管理有限公司 | Rapid curing agent for pipe-jacking construction slurry and rapid curing method |
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| Publication number | Publication date |
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| CN111072339B (en) | 2023-04-14 |
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Inventor after: Li Yongzhen Inventor after: Wei Hui Inventor after: Hou Jialin Inventor after: Jiang Feng Inventor after: Fan Liang Inventor after: Wang Lin Inventor after: Ma Shijie Inventor after: Lin Jiangtao Inventor after: Bi Fei Inventor after: Zhou Shengjie Inventor after: Zhang Yan Inventor after: Liang Hao Inventor before: Fan Liang Inventor before: Wang Lin Inventor before: Ma Shijie Inventor before: Zhang Yan Inventor before: Li Yongzhen Inventor before: Hou Jialin Inventor before: Zhou Shengjie Inventor before: Liang Hao Inventor before: Lin Jiangtao Inventor before: Wei Hui Inventor before: Jiang Feng Inventor before: Bi Fei |
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