High-performance environment-friendly soft soil curing agent and preparation method thereof

A curing agent, high-performance technology, used in chemical instruments and methods, soil conditioning materials, organic fertilizers, etc., can solve the problems of high risk of shrinkage cracking, limited application scope, up to hundreds of dollars, etc., to speed up the curing reaction rate. , Improve crack resistance, good fiber reinforcement effect

Active Publication Date: 2020-04-07
SHANGHAI MUNICIPAL ENG DESIGN INST GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its representative products include South African ISS curing agent, American Magic series and Pansai series products, but they have problems such as poor water stability. For example, the 7d saturated unconfined compressive strength of Magic products is less than 0.3Mpa, while the Pansai series is only 0.09 Mpa, so the range of application is limited
For example, the relatively mature Parma liquid soil reinforcement technology in foreign countries currently sells for hundreds of dollars per gallon (about 3.7kg), which is much higher than cement, lime and other materials of several hundred yuan per ton, and it is mainly suitable for Fine-grained soil with high clay content, and there are problems such as strength decrease after soaking in water
[0006] Aiming at the problems of slow early strength development, high risk of shrinkage and cracking, poor water stability and high price of common curing agent products, the invention discloses a high-performance environment-friendly soft soil curing agent and its preparation method, which has the advantages of simple preparation process, The product has the advantages of good performance and environmental protection, and can be used for the reinforcement of various soft soils, with broad application prospects

Method used

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  • High-performance environment-friendly soft soil curing agent and preparation method thereof
  • High-performance environment-friendly soft soil curing agent and preparation method thereof
  • High-performance environment-friendly soft soil curing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]Example 1, a high-performance environment-friendly soft soil curing agent and its preparation method, according to the weight ratio of raw materials: desulfurization gypsum 100, α-hemihydrate gypsum 5, slag powder (S95:S105=60:40) 110, construction waste slag 80 , sodium hydroxide 1.5, inorganic salts (CaCl 2 : FeCl 3 =70:30) 1.5, cellulose ether 0.1, polypropylene fiber (10mm in length) 0.5, sodium stearate 4 Weigh the raw materials, first add slag powder, construction waste residue, sodium hydroxide and inorganic salts into the ball mill for powder Grinding modification, after grinding for 15 minutes, adding desulfurized gypsum and α-hemihydrate gypsum to the ball mill, grinding for 3 minutes, finally adding cellulose ether, polypropylene fiber and sodium stearate to the ball mill, grinding for 2 minutes, and obtaining The product of the present invention is denoted as S-1.

Embodiment 2

[0038] Example 2, a high-performance environment-friendly soft soil curing agent and its preparation method, according to the weight ratio of raw materials: desulfurization gypsum 100, α-hemihydrate gypsum 15, slag powder (S95:S105=70:30) 140, construction waste slag 60 , sodium hydroxide 2.5, inorganic salts (CaCl 2 : FeCl 3 =60:40) 2.0, cellulose ether 0.15, polypropylene fiber (8mm in length) 0.9, calcium stearate 5.5 Weigh the raw materials, first add slag powder, construction waste residue, sodium hydroxide and inorganic salts into the ball mill for powder Grinding modification, after grinding for 17 minutes, adding desulfurized gypsum and α-hemihydrate gypsum to the ball mill, grinding for 4 minutes, finally adding cellulose ether, polypropylene fiber and sodium stearate to the ball mill, grinding for 2 minutes, and obtaining The product of the present invention is denoted as S-2.

Embodiment 3

[0039] Example 3, a high-performance environment-friendly soft soil curing agent and its preparation method, according to the weight ratio of raw materials: desulfurization gypsum 100, β-hemihydrate gypsum 25, slag powder (S95:S105=80:20) 155, construction waste slag 45 , sodium hydroxide 3.0, inorganic salts (CaCl 2 : FeCl 3 =55:45) 2.5, cellulose ether 0.3, polypropylene fiber (8mm in length) 1.6, zinc stearate 6.5 Weigh the raw materials, first add slag powder, construction waste residue, sodium hydroxide and inorganic salt into the ball mill for powder Grinding modification, after grinding for 18 minutes, add desulfurized gypsum and β-hemihydrate gypsum to the ball mill, grind for 5 minutes, finally add cellulose ether, polypropylene fiber and sodium stearate to the ball mill, grind for 3 minutes, and obtain The product of the present invention is denoted as S-3.

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Abstract

The invention belongs to the technical field of advanced civil engineering materials, and particularly relates to a high-performance environment-friendly soft soil curing agent and a preparation method thereof. Adopted raw materials comprise desulfurized gypsum, building gypsum, slag powder, building waste residue, sodium hydroxide, inorganic salt, cellulose ether, polypropylene fiber and stearate. The preparation method comprises the steps: grinding and modifying the slag powder, building waste residues, sodium hydroxide and inorganic salt in a ball mill; followed by adding the desulfurized gypsum and building gypsum, grinding finely and mixing; and finally adding the cellulose ether, polypropylene fibers and stearate to finish mixing, and thus obtaining the product. According to the invention, the building and industrial wastes are reused by utilizing a grinding modification and activity excitation technology, and the product has the excellent performances, such as fast early strength development, small shrinkage distortion, good water stability and the like, is suitable for reinforcing various soft soil bodies, and has wide application fields.

Description

technical field [0001] The invention belongs to the technical field of advanced civil engineering materials, and in particular relates to a high-performance environment-friendly soft soil curing agent and a preparation method thereof. Background technique [0002] With the rapid development of economic construction, the total amount of construction waste generated in the process of engineering construction has also increased sharply, and has become an important environmental problem restricting the sustainable development of cities. Among them, crushing and screening are often used to obtain recycled aggregates for waste concrete, and they are used. However, the construction waste generated during the crushing process is difficult to use due to its low strength. , also has adverse effects on the soil due to its alkaline filtrate. In addition, with the increase of engineering excavation, the proportion of engineering spoils in construction waste is also increasing, and it is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K103/00
CPCC09K17/40C09K2103/00
Inventor 水亮亮郑晓光吴立报陈亚杰徐弯弯
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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