Method for preparing air entraining agent for concrete

An air-entraining agent and concrete technology, applied in the field of concrete engineering, can solve the problems of ineffective uniform dispersion, strong bubble accumulation, large resistance, etc., and achieve the effects of wide applicability, high bubble stability and small pore size

Active Publication Date: 2009-11-18
安徽海螺材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the air-entraining agents of the saponin soaps produce thicker bubble walls, higher strength, stronger accumulation of bubbles, and greater mutual resistance, so they cannot be effectively and evenly dispersed into the concrete, thereby making it effective in improving concrete. The workability, pumpability and bleeding reduction of the mixture are inferior to those of rosin thermal polymer air-entraining agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1, the concrete air-entraining agent of the present invention is formulated into a 30 ± 1% aqueous solution by weight of 100 parts of sodium lauroyl sarcosinate, 6 parts of cocoic acid diethanolamide, 5 parts of polyethylene glycol and 6 parts of bone glue, Compared with the reference concrete (concrete with the same mix ratio without adding the air-entraining agent, the same below), adding the air-entraining agent accounting for 0.04% of the cement mass can make the air content of the concrete reach 3.0%, and the water reducing rate reach 5.0% %, the bleeding rate is reduced by 45%, and the compressive strength ratios of 7d and 28d are both above 98%.

Embodiment 2

[0041] Embodiment 2, the concrete air-entraining agent of the present invention is formulated into a 30 ± 1% aqueous solution by weight of 100 parts of sodium lauroyl sarcosinate, 12 parts of cocoic acid diethanolamide, 13 parts of polyethylene glycol and 14 parts of bone glue. Compared with the reference concrete, adding the air-entraining agent accounting for 0.04% of the cement mass can make the air content of the concrete reach 3.2%, the water reduction rate reach 5.0%, and the bleeding rate decrease by 48%. All above 95%.

Embodiment 3

[0042] Embodiment 3, the concrete air-entraining agent of the present invention is formulated into a 30 ± 1% aqueous solution by weight of 100 parts of sodium lauroyl sarcosinate, 6 parts of cocoic acid diethanolamide, 13 parts of polyethylene glycol and 14 parts of bone glue. Compared with the reference concrete, adding the air-entraining agent accounting for 0.04% of the cement mass can make the air content of the concrete reach 3.0%, the water reduction rate reach 4.0%, and the bleeding rate decrease by 46%. All above 98%.

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Abstract

The invention belongs to the field of construction industry and particularly relates to an air entraining agent for concrete. The air entraining agent for concrete of the invention consists of sodium lauroyl sarcosine, lauric acid, diethanolamide, polyglycol and bone glue. The prepared air entraining agent has the characteristics of good foaming effect, uniform air bubbles and stable foam and has the functions of improving the workability and pumpability of concrete and reducing bleeding. The air entraining agent can be widely used in concrete projects such as reinforced concrete, civil structure, highway, bridge and building construction.

Description

technical field [0001] The technical invention relates to a preparation method of a concrete air-entraining agent, which belongs to the field of construction industry and is mainly used in concrete engineering. technical background [0002] Careful use of a certain amount of air-entraining agent in concrete engineering can produce a certain amount of fine round closed air cells in fresh concrete, which can improve the fluidity and workability of concrete and reduce segregation and bleeding of the mixture. , It is very beneficial to improve the uniformity and durability of concrete (impermeability, frost resistance). It also reduces the cost of admixtures and concrete. The research and application of excellent air-entraining agents is an inevitable trend in the development of concrete and its admixtures in my country. [0003] At present, there are mainly three kinds of air-entraining agents used in my country: namely, dodecylbenzenesulfonic acid, tripartite saponins and ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12C04B24/02C04B103/30
Inventor 朱化雨赵洪义魏树林陈新中朱孔赞
Owner 安徽海螺材料科技股份有限公司
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