Compound curing agent of high cement slurry

A composite curing agent and mud technology, which is applied in the field of civil engineering and building materials, can solve the problems that cement cannot effectively bond cohesive soil, cement slurry curing effect is poor, hinder cement hydration reaction, etc., so as to achieve improved curing effect and good economic benefits. and social benefits, the effect of promoting recycling

Active Publication Date: 2009-12-23
WENZHOU UNIVERSITY
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Problems solved by technology

Due to the slow setting and hardening of ordinary cement and lime, they will partially settle before setting in the case of high water-solid ratio, and the mud usually contains more organic substances, which will hinder the hydration reaction of cement and cause the cement to fail. Effectively bonds cohesive soils, so grout curing is often poor or impossible
Cured strength is lower when lime is used for curing
In addition, the use of ordinary cement as the mud curing agent requires a cement mixing ratio of about 10%, which is expensive and causes a huge waste of resources

Method used

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  • Compound curing agent of high cement slurry
  • Compound curing agent of high cement slurry
  • Compound curing agent of high cement slurry

Examples

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Embodiment 1

[0016] The conventional size of the mortar test is adopted, and the sample size is 70.7mm×70.7mm×70.7mm. The mud to be solidified is the mud for bored piles at a construction site, with a moisture content of 200% and a density of 1.36g / cm 3 . Mix the curing agent and the mud evenly and pour it into the test mold, insert and tamp it manually so that the mud surface is 3-5mm higher than the test mold, lift one end of the test mold and vibrate 5-10 times, then lift the other end of the test mold to vibrate 5-10 times , to smooth the surface. After the test block was formed, it was cured at 20°C for 24 hours to be demoulded, and then placed in a standard curing room for curing. The unconfined compressive strength of the mud solidified body was measured at the age of 7 days. The raw materials for curing agent preparation are: the cement used is ordinary portland cement with the label of 425; the fine sand used is sand with a fineness modulus of 1.7; the lime used is slaked lime ...

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Abstract

The invention relates to a compound type slurry curing agent for conducting curing treatment on waste slurry generated in geotechnical engineering (for example, investigation drilling, cast-in-place pile, anchorage engineering, trenchless construction and the like), as well as the sludge at the bottom of reservoirs, ditches, ponds, pools and the like. In the invention, the compound type slurry curing agent is prepared by adding and mixing fine sand, lime, industrial waste gypsum, fly ash and super absorbent resin in cement curing agent evenly according to a certain proportion. The slurry curing agent greatly improves the curing effect of slurry, reduces the use amount of cement and lowers the cost. Besides, by doping industrial wastes such as waste gypsum, fly ash and the like in cement, the pollution to the environment is abated, the recycle of wastes is promoted and favorable economic and social benefits are available.

Description

technical field [0001] The invention relates to a high-cement slurry composite curing agent, which is suitable for waste mud produced in geotechnical engineering (such as survey drilling, pouring pile and anchoring engineering, non-excavation construction, etc.), as well as reservoirs, canals, ponds, pools, etc. The solidification treatment of bottom sludge belongs to the technical field of civil engineering materials. Background technique [0002] A large amount of waste mud produced in geotechnical engineering construction (such as survey drilling, cast-in-situ pile and anchoring engineering, trenchless construction, etc.) is mainly a suspension composed of clay, sewage, dirty oil, drilling cuttings and mud treatment agent and The mixture of colloidal solutions will pollute the environment and have a negative impact on construction. The specific manifestations are: the waste mud produced by the project construction is difficult to degrade in the natural state, causing soi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B14/06C04B18/08
CPCC04B28/14Y02W30/91C04B7/00C04B14/06C04B18/08C04B22/064C04B24/24
Inventor 王军蔡袁强丁光亚孙林柱
Owner WENZHOU UNIVERSITY
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