Channel side slope cast in situ concrete composite additive and preparation method thereof

A technology of concrete and additives, applied in the field of building materials, can solve the problems of low early strength, large leakage loss, poor impermeability, etc., and achieve the effects of improving early strength, reducing water-cement ratio, and improving strength

Inactive Publication Date: 2016-01-20
广西壮族自治区水利科学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems existing in the channel slope cast-in-place ordinary concrete and concrete additives in the prior art, and provide a method that can improve the construction quality of the channel slope concrete and avoid the unevenness and unevenness after the channel slope concrete is poured. Composite additive with low early strength, easy cracking, poor impermeability and large leakage loss and preparation method thereof

Method used

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  • Channel side slope cast in situ concrete composite additive and preparation method thereof
  • Channel side slope cast in situ concrete composite additive and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A composite additive for cast-in-place concrete on channel slopes is composed of the following raw materials: by weight, 40 parts of calcium lignosulfonate water reducing agent, 10 parts of naphthalene series, 1 part of dodecylbenzenesulfonic acid 5 parts of thickener carboxymethyl cellulose, 5 parts of early strength agent methanol and 60 parts of tap water.

[0027] Preparation method: turn on the electric mixer, control the speed of 60r / min, and mix the raw materials in the following order by weight: 50 parts of water reducing agent, 1 part of air-entraining agent, 5 parts of thickener, 5 parts of early strength agent, and 60 parts of tap water in order Put it into the mixer and stir continuously for 40 minutes to get the composite additive for cast-in-place concrete on channel slope.

Embodiment 2

[0029] A compound additive for cast-in-place concrete on channel slopes is composed of the following raw materials: 40 parts by weight of naphthalene water reducing agent, 2 parts of air-entraining agent dodecylbenzenesulfonic acid and 3 parts of triterpene saponins Mixing, 10 parts of thickener polyacrylamide, 10 parts of early strength agent methanol, 5 parts of ethanol and 45 parts of tap water.

[0030] Preparation method: turn on the electric mixer, control the speed of 80r / min, and mix the raw materials in the following order by weight: 40 parts of water reducing agent, 5 parts of air-entraining agent, 10 parts of thickener, 15 parts of early strength agent, and 45 parts of tap water in order Put it into the mixer and stir continuously for 25 minutes to get the composite additive for cast-in-place concrete on channel slope.

Embodiment 3

[0032] A compound additive for cast-in-place concrete on channel slopes is composed of the following raw materials: 30 parts by weight of water reducing agent sulfamate, 2 parts of air-entraining agent rosin thermopolymer, and 10 parts of thickener sodium polyacrylate 15 parts and 2 parts of carboxymethyl cellulose, 15 parts of early strengthening agent triethanolamine and 40 parts of tap water.

[0033] Preparation method: turn on the electric mixer, control the speed of 70r / min, and mix the raw materials in the following order by weight: 30 parts of water reducer, 2 parts of air-entraining agent, 12 parts of thickener, 15 parts of early strength agent, and 40 parts of tap water in order Put it into the mixer and stir continuously for 30 minutes to get the composite additive for cast-in-place concrete on channel slope.

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Abstract

The invention discloses a channel side slope cast in situ concrete composite additive, and a preparation method thereof. The channel side slope cast in situ concrete composite additive comprises, by weight, 25 to 50 parts of a water reducing agent, 1 to 5 parts of an air entraining agent, 5 to 15 parts of a thickening agent, 4 to 20 parts of an early strength agent, and 20 to 60 parts of water. The channel side slope cast in situ concrete composite additive obvious water reducing effect, air entraining effect, thickening effect, and early strength effect, is capable of increasing strength, compactibility, impermeability, and crack resistance of channel side slope concrete greatly, improving construction quality, and prolonging project service life. According to application processes of the channel side slope cast in situ concrete composite additive in channel side slope cast in situ concrete, the admixing amount of the channel side slope cast in situ concrete composite additive only accounts for 0.5 to 1.5% of the total mass of cement in the concrete; cost is relatively low; economic benefit is excellent; and the channel side slope cast in situ concrete composite additive is suitable for large-scale popularization.

Description

technical field [0001] The technical field of building materials of the present invention is specifically a composite additive for cast-in-place concrete on channel slopes and a preparation method thereof. Background technique [0002] Continuing construction of irrigation districts and water-saving reconstruction projects have the largest amount of work and the most impact on project efficiency is the anti-seepage lining of canals. Concrete is the most used material for anti-seepage linings of canals. Due to the special slope structure of the canal, the slope ratio of the canal slope It often reaches 1:1 or even greater. It is a big problem to pour concrete on such a steep slope and ensure the quality of the concrete. [0003] Ordinary concrete is poured on the side slope of the channel. Due to the difficulty in controlling the fluidity, consistency, and compactness of the concrete, and the construction of the channel project is greatly affected by the seasons, most of whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B24/26C04B24/20
Inventor 陈建国郭晋川彭华娟刘鲁强周立新王忠民陈树亮李达春蒋巧玲曾宏杨建坤满志强黄小兵
Owner 广西壮族自治区水利科学研究院
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