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High performance no-contraction cement base grouting material and its preparing method

A grouting material and cement-based technology, applied in the field of high-performance cement-based grouting materials, can solve problems affecting grouting quality, poor grout stability, groutability limitations, etc., to improve grout stability, meet rapid repair, set time controllable effect

Inactive Publication Date: 2003-11-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary cement-based grouting materials have coarse particles, poor stability of the slurry, easy precipitation and water, and volume shrinkage when hardened; for fine rock mass cracks below 0.2mm, medium and fine sand layers and large concentrated seepage The anti-seepage treatment, its groutability is limited, prone to adverse phenomena such as dehydration, thickening and corrosion, which affect the quality of grouting
At the same time, after the foundation is strengthened and grouted, the slurry has a certain shrinkage and is easy to crack again

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] High-performance non-shrinkage grouting material, composed of Portland cement, high-alumina clinker, bentonite, sodium methylnaphthalenesulfonate condensate, defoamer, cellulose ether, and quartz sand. According to the environmental conditions of the application, the material with the required performance can be obtained by properly adjusting the proportion of the components. Embodiment 1, the weight proportion of each component is:

[0031] Portland cement 100

[0032] Sulphoaluminate clinker 15

[0033] Bentonite 10

[0034] Sodium methylnaphthalene sulfonate condensate 3

[0035] Defoamer 1

[0036] Cellulose ether 0.01

[0037] Quartz sand 0.

[0038] The particle size of the above-mentioned raw materials after blending and grinding is controlled at d 95 ≤10μm, the obtained cement-based grouting material has high permeability and slurry stability, and can be poured into ultra-fine cracks. Embodiment 2, the weight proportion of each component is:

Embodiment 2

[0038] The particle size of the above-mentioned raw materials after blending and grinding is controlled at d 95 ≤10μm, the obtained cement-based grouting material has high permeability and slurry stability, and can be poured into ultra-fine cracks. Embodiment 2, the weight proportion of each component is:

[0039] Portland cement 100

[0040] Sulphoaluminate clinker 20

[0041] Bentonite 12

[0042] Sodium methylnaphthalene sulfonate condensate 4

[0043] Antifoam 2

[0044] Cellulose ether 0.02

[0045] Quartz sand 0.

[0046] The particle size of the above-mentioned raw materials after blending and grinding is controlled at d 95 ≤10μm, the obtained cement-based grouting material has excellent properties such as no shrinkage, high stone strength, high permeability, slurry stability, and can be poured into ultra-fine cracks. Embodiment 3, the weight proportion of each component is:

Embodiment 3

[0046] The particle size of the above-mentioned raw materials after blending and grinding is controlled at d 95 ≤10μm, the obtained cement-based grouting material has excellent properties such as no shrinkage, high stone strength, high permeability, slurry stability, and can be poured into ultra-fine cracks. Embodiment 3, the weight proportion of each component is:

[0047] Portland cement 100

[0048] Sulphoaluminate clinker 35

[0049] Bentonite 10

[0050] Sodium methylnaphthalene sulfonate condensate 4

[0051] Antifoam 3

[0052] Cellulose ether 0.01

[0053] Quartz sand 60

[0054] (of which 1.25mm-2.5mm 18

[0055] <1.25mm 42 The average particle size of the above-mentioned raw materials blended and ground, except quartz sand, is controlled at about 20 μm, and the obtained cement-based grouting material has large fluidity, high strength, early strength, no shrinkage, and high volume stability Excellent properties such as durability and high durability.

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Abstract

The high-performance no-contraction cement-base grouting material consists of portland cement, sulphoaluminate clinker, bentonite, sodium methyl naphthalenesulfonate condensate, defoaming agent, quartzite, etc. in certain proportion. The grouting material has controllable solidification time, excellent flowability, excellent grouting performance, relatively high volume stability and no contraction. The present invention may be used widely in the repair and construction of various concrete engineering.

Description

technical field [0001] The invention relates to a high-performance cement-based grouting material for engineering repair and reinforcement. Specifically, it relates to a high-performance cement-based grouting material for repair and reinforcement in water conservancy, hydropower, road, underground, foundation and other projects. Background technique [0002] Due to its high brittleness, concrete structures often crack inevitably in engineering applications. Cracking of the concrete structure leads to the decrease of water tightness and leakage of the concrete structure, which affects the service life of the project and even cannot be used normally. Therefore, in the construction and use stages, many projects such as water conservancy, railways, highways, bridges, subways, etc. inevitably need grouting materials to repair and reinforce cracks. Dam foundations in water conservancy projects also often require grouting and anti-seepage reinforcement. The installation of many ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B14/10C04B24/22C04B24/38C04B28/04
Inventor 蒋正武孙振平
Owner TONGJI UNIV
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