Low-permeability cement-based grouting material suitable for chloride ions

A low-permeability, cement-based technology, applied in the field of cement-based grouting materials, can solve the problems of shortening the service life of buildings or equipment, low resistance to chloride ion penetration, and failure to meet requirements, so as to improve the performance of resistance to chloride ion penetration and improve Strength and construction performance, widely used effect

Inactive Publication Date: 2017-06-23
NANTONG VOCATIONAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the rapid development of the coastal economy, super high-rise buildings and large-scale equipment emerge in endlessly, especially the prevalence of prefabricated buildings, but these buildings or equipment have been damaged by the penetration of chloride ions

Method used

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  • Low-permeability cement-based grouting material suitable for chloride ions

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 40.7% of 42.5R ordinary Portland cement, 40.7% of river sand with a maximum particle size of 2.36mm, 3.3% of Class I fly ash, 2.0% of silica fume, 0.28% of polycarboxylic acid superplasticizer, tartaric acid retarder 0.04%, CMA high-performance expansion agent 3.28%, add 9.7% water and mix, and mix well with a mortar mixer.

Embodiment 2

[0027] 40.4% of 42.5R ordinary Portland cement, 40.4% of river sand with a maximum particle size of 2.36mm, 3.2% of Class I fly ash, 2.0% of silica fume, 0.28% of polycarboxylic acid superplasticizer, tartaric acid retarder 0.04%, CMA high-performance expansion agent 3.28%, add 10.4% water and mix, and mix well with a mortar mixer.

Embodiment 3

[0029] 40% of 42.5R ordinary Portland cement, 40% of river sand with a maximum particle size of 2.36mm, 3.2% of Class I fly ash, 2.0% of silica fume, 0.28% of polycarboxylate superplasticizer, tartaric acid retarder 0.04%, CMA high-performance expansion agent 3.18%, add 11.3% water and mix, and mix well with a mortar mixer.

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Abstract

The invention discloses a low-permeability cement-based grouting material suitable for chloride ions. The low-permeability cement-based grouting material is prepared from the following raw materials by percentages: 39.7-40.7% of 42.5R ordinary portland cement, 39.7-40.7% of river sand, 3.2-3.3% of fly ashes, 2% of silica fume, 0.28% of a water reducing agent, 0.04% of a retarder, 3.18-3.28% of an expanding agent and 9.7-11.9% of water. According to the cement-based grouting material, admixtures such as the river sand, the fly ashes and the silica fume are optimized and combined on the basis of the ordinary portland cement, and supplemented by additives such as the water reducing agent, the retarder and the expanding agent, so that the cement-based grouting material has the advantages of high early strength, high long-term strength, good workability, micro-expansion and no bleeding through a reasonable water-cement ratio, and also has the characteristics of low total chloride ion content, a low electric flux value and high chloride penetration resistance.

Description

technical field [0001] The invention belongs to the field of cement-based grouting materials, and in particular relates to a cement-based grouting material with low chloride ion permeability. Background technique [0002] Cement-based grouting material is a dry mixture mixed with cement, admixtures (water reducer, expansion agent, retarder, etc.), aggregates and mineral admixtures. After mixing with water, it has high strength and workability. Good, micro-expansion, non-bleeding, etc., and this type of grouting material is non-toxic, harmless, and low in price. It is mostly used in secondary grouting for mechanical equipment installation, anchoring of anchor bolts, reconstruction and reinforcement of concrete structures, and prefabricated buildings. The grout connection and other fields. [0003] With the rapid development of the coastal economy, super high-rise buildings and large-scale equipment emerge in endlessly, especially the prevalence of prefabricated buildings, bu...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/24C04B111/70
CPCC04B28/04C04B2111/24C04B2111/70C04B2201/50C04B2201/52C04B14/06C04B18/08C04B14/062C04B2103/302C04B24/06C04B2103/0068
Inventor 朱燕陈佳佳宋玲徐广舒宋健王伟
Owner NANTONG VOCATIONAL COLLEGE
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