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Concrete anti-dispersing agent and application thereof in concrete

An anti-dispersant, concrete technology, applied in the field of concrete anti-dispersant, can solve the problems of poor pumpability, low strength, chloride ion impermeability, poor frost resistance, etc., to ensure quality, convenient construction, good anti-dispersion. and durable performance

Active Publication Date: 2022-04-12
THE FOURTH ENGIENERING OF CHINA RAILWAY18 BUREAU GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the existing anti-dispersion agents are applied to concrete, there are still problems such as anti-dispersion, poor fluidity, chloride ion impermeability, poor frost resistance, poor pumpability and low strength.
Especially in the water environment where the water depth exceeds 80 meters and the water velocity is relatively high (over 1m / s), the anti-dispersion performance of the anti-dispersion agent needs to be improved

Method used

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  • Concrete anti-dispersing agent and application thereof in concrete
  • Concrete anti-dispersing agent and application thereof in concrete
  • Concrete anti-dispersing agent and application thereof in concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A concrete anti-dispersion agent, comprising the following components in parts by weight:

[0045] 2 parts of polyacrylamide; 10 parts of hydroxypropyl methylcellulose; 12 parts of polycarboxylate superplasticizer; 30 parts of silica fume; 120 parts of fly ash and 0.2 parts of early strengthening agent calcium formate.

[0046]The above-mentioned components are mixed to obtain the concrete anti-dispersion agent.

Embodiment 2

[0048] A concrete anti-dispersion agent, comprising the following components in parts by weight: 4 parts of polyacrylamide; 8 parts of hydroxypropyl methylcellulose; 18 parts of polycarboxylate superplasticizer; 70 parts of silica fume; Ash 80 parts and early strengthening agent calcium formate 0.8 parts.

[0049] The above-mentioned components are mixed to obtain the concrete anti-dispersion agent.

Embodiment 3

[0051] A concrete anti-dispersion agent, comprising the following components in parts by weight: 3.5 parts of polyacrylamide; 8.5 parts of hydroxypropyl methylcellulose; 14 parts of polycarboxylate superplasticizer; 60 parts of silica fume; Ash 90 parts and early strengthening agent calcium formate 0.6 parts.

[0052] The above-mentioned components are mixed to obtain the concrete anti-dispersion agent.

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Abstract

The invention discloses a concrete anti-dispersing agent which is characterized by comprising the following components in parts by weight: 2-4 parts of polyacrylamide; 8 to 10 parts of hydroxypropyl methyl cellulose; 12 to 18 parts of a water reducing agent; 30 to 70 parts of silica fume; 80 to 120 parts of fly ash; and 0.2 to 0.8 part of early strength agent. The anti-dispersing agent has good adaptability to concrete, the prepared concrete has good fluidity, pumpability, chloride ion impermeability, freezing resistance and anti-dispersing performance (no dispersion and no segregation), and the compressive strength of the concrete reaches 40MPa in 28d underwater with the water flow velocity exceeding 1m / s, which all meet the national standard requirements.

Description

technical field [0001] The invention relates to the technical field of concrete anti-dispersion agent, in particular to a concrete anti-dispersion agent and its application in concrete. Background technique [0002] As the most widely used material in the construction of underwater projects, concrete is quite different from the concrete used in construction in ordinary environments. In the underwater construction, the concrete mixture is directly placed in the water, because the water will wash away the concrete mixture, the cement and aggregate will be separated and will not stick together, some will be washed away, and some will remain in suspension for a long time , thus losing the ability to cement the aggregate, which cannot meet the needs of the project, pollute the waters, and do not meet the requirements of green construction. [0003] The anti-dispersion agent for underwater non-dispersible concrete is a new type of concrete admixture, which can greatly increase th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B28/02
CPCY02W30/91
Inventor 马骏
Owner THE FOURTH ENGIENERING OF CHINA RAILWAY18 BUREAU GROUP