Low-heat high-strength micro-expansion cement-based grouting material

A grouting material and micro-expansion technology, applied in the field of cement grouting materials, can solve the problems of hardened cement slurry cracks, poor durability, and cement slurry temperature rise, so as to reduce hydration heat and hydration temperature rise, reduce slurry Loss of fluidity, effects of increasing density and strength

Inactive Publication Date: 2019-07-09
63653 FORCES PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when conventional cement grouting materials are used for high-reliability dense filling of large-volume structures in underground engineering, there is often an excessive heat of hydration, which causes the temperature rise of the cement slurry to be too high, which in turn leads to cracks inside the hardened cement slurry. Affects the sealing reliability of the f

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Weigh 20 parts of 425# ordinary Portland cement, 32.5 parts of fly ash, 30 parts of granulated blast furnace slag, 7.5 parts of limestone powder, 1.9 parts of zeolite powder and 10 parts of expansion agent Put it into the mixer and stir continuously at low speed for 0.5~1 min until the powder is uniform; add 25 parts of purified water and 1.5 parts of water reducing agent into the mixer and continue stirring for 3~5 min until a uniform high flow is formed sexual paste. Put the above slurry into a 16cm×4cm×4cm mold to test its compressive strength at different ages under standard curing conditions; use GBT 8077-2012 "Concrete Admixture Homogeneity Test Method" to test the fluidity of the grouting material ; Use JC 313 / 96 "Expansion Cement Expansion Rate Test Method" to test the expansion rate of the grouting material; use a self-made semi-adiabatic temperature rise test device to test the maximum temperature rise of the material. The fluidity of the above gro...

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PUM

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Abstract

The invention belongs to the field of building materials, and discloses a low-heat high-strength micro-expansion cement-based grouting material, which is prepared from the following raw materials in parts by weight: 15-25 parts of Portland cement, 20-40 parts of fly ash, 20-40 parts of granulated blast furnace slag powder, 5-15 parts of limestone powder, 1-3 parts of zeolite powder, 8-12 parts ofexpanding agent, 1.2-1.8 parts of water reducing agent and 20-30 parts of water. High-reliability dense filling and plugging of a large-size building structure in underground engineering can be achieved.

Description

technical field [0001] The invention belongs to the field of building materials, and relates to a cement grouting material with low heat of hydration, high strength and micro-expansion, which is mainly used for high-reliability dense filling of large-volume building structures in underground engineering, and plays the role of anti-seepage and plugging role. Background technique [0002] Grouting refers to making high-fluidity slurry from materials with filling and gelling effects, and injecting it into formations or fractures through pressure-feeding equipment to make it gel or solidify, so as to play the role of reinforcement or anti-seepage plugging. Grouting materials are mainly divided into cement grouting materials and chemical grouting materials. Cement grouting material has a wide range of applications due to its advantages of abundant raw material sources, low price and high strength of hardened slurry. However, when conventional cement grouting materials are used ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/70
CPCC04B28/04C04B2111/70C04B2201/50C04B18/08C04B18/142C04B14/28C04B14/047C04B2103/0068C04B24/24
Inventor 不公告发明人
Owner 63653 FORCES PLA
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