Novel cement-based anti-impact paste slurry and preparation method thereof

Abstract

The invention discloses novel cement-based anti-impact paste slurry. The novel cement-based anti-impact paste slurry is prepared from the following components: in a plain cement slurry system with a water cement ratio of 0.48-0.51, 1wt% of cationic polyacrylamide, 2wt% of hydroxyethyl cellulose ether, and 1wt% of a SN-7 accelerator; the SN-7 accelerator is prepared from the following chemical components in percentage by weight: 2% of a water reducer, 81% of sodium metaaluminate, 12% of calcium silicate and 5% of sodium aluminoferrite, wherein a water cement ratio is preferably 0.5 to 1. The invention further discloses a preparation method for the paste slurry. A taguchi method is adopted to design a three-factor three-level orthogonal test program, and yield stress and plastic viscosity ofthe test sample are mainly observed; a multi-factor variance analysis and grey relational degree assessment method is utilized to refine the novel cement-based anti-impact paste slurry formula whichmeets the yield stress and the plastic viscosity optimizing index.

Description

technical field [0001] The invention relates to the technical field of cement-based paste, in particular to a novel cement-based anti-shock paste and a preparation method thereof. Background technique [0002] With the continuous development of social economy, the construction of large-scale water conservancy and hydropower projects is booming, but the leakage problems of dam foundations or cofferdams occur from time to time, and grouting is one of the effective methods to solve such problems. Grouting is to inject materials with filling and cementing properties into the cracks or holes in the formation through equipment, and wait for the grout to solidify and harden to form a "slurry stone body" with high strength, good impermeability, and good durability. [1,2] , in order to achieve the purpose of filling reinforcement, seepage prevention and plugging. [0003] In the past, there were two main types of grouting materials involved in foundation reinforcement and plugging c...

AI Technical Summary

Problems solved by technology

Compared with the traditional cement-based paste, the newly released admixture has greatly improved the performance of the cement in the case of single use [10] However, engineering practice shows that the loss rate of cement-based paste with a single additive is as high as 60% in the plugging treatment of faults, fissures, and caves with a water gushing pressure of 6MPa. [11] , the technical and economic effects are difficult to meet the engineering requirements

[0005] Generally speaking, a single additive is difficult to meet the situation of large flow water flushing. At the same time, if a compound slurry with multiple additives is used, which additives to use, the amount of addition, and the effect of additive compounding still need to be systematically tested and practiced.

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