Concrete anti-bleeding inhibitor with water reducing function and preparation method thereof

An anti-bleeding and concrete technology, applied in the field of concrete admixtures, can solve the problems of poor workability, poor water retention and water absorption, prone to bleeding, and bottom grasping, etc., and achieves improved interaction, strong anti-bleeding and long-term effects The effect of slump retention

Active Publication Date: 2019-03-01
SICHUAN TONGZHOU CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a concrete anti-bleeding inhibitor with water-reducing function and a preparation method thereof, through which a concrete anti-bleeding inhibitor with water-reducing function can be prepared at a normal temperature of 15-30°C. Concrete anti-bleeding inhibitor, the anti-bleeding inhibitor can effectively solve the existing polycarboxylate superplasticizers with poor water retention and water absorption performance, poor workability, and prone to bleeding and bottoming problems

Method used

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  • Concrete anti-bleeding inhibitor with water reducing function and preparation method thereof

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Embodiment 1

[0027] A concrete anti-bleeding inhibitor with water reducing function, comprising the following raw materials in parts by mass: 300 parts of isopentenol polyoxyethylene ether, 68 parts of acrylic acid, 21 parts of acrylamide, 2-acrylamide-2-methanol 5.7 parts of propanesulfonic acid, 0.72 parts of N,N-methylenebisacrylamide, 2.4 parts of hydrogen peroxide, 2.1 parts of potassium persulfate, 0.35 parts of vitamin C, 0.25 parts of sodium bisulfite, 1.2 parts of mercaptopropionic acid, 465 parts of ionic water; unsaturated polyether macromonomer, unsaturated carboxylic acid, unsaturated amide, unsaturated sulfonic acid or its salt and crosslinking agent, the ratio of their substances is: 1.0:7.55:2.33:0.22 :0.037.

[0028] The preparation method of the above-mentioned concrete anti-bleeding inhibitor with water reducing function comprises the following steps:

[0029] (1) 300g of isopentenol polyoxyethylene ether with a molecular weight of 2400, 21g of acrylamide, 5.7g of 2-acr...

Embodiment 2

[0033]A concrete anti-bleeding inhibitor with water reducing function, comprising the following raw materials in parts by mass: 360 parts of isopentenol polyoxyethylene ether, 95 parts of methacrylic acid, 30 parts of methacrylamide, methacryl sulfonate 6 parts of sodium thiosulfate, 3.2 parts of polyethylene glycol 400 diacrylate, 2.4 parts of hydrogen peroxide, 2.4 parts of ammonium persulfate, 0.55 parts of vitamin C, 0.35 parts of sodium thiosulfate, 0.72 parts of thioglycolic acid, 0.6 parts of mercaptopropionic acid, 480 parts of deionized water; Unsaturated polyether macromonomer, unsaturated carboxylic acid, unsaturated amide, unsaturated sulfonic acid or its salt and linking agent, the ratio of their amount of substance is: 1.0:7.36:2.35: 0.25:0.042.

[0034] The preparation method of the above-mentioned concrete anti-bleeding inhibitor with water reducing function comprises the following steps:

[0035] (1) 360g molecular weight is 2400 prenol polyoxyethylene ether,...

Embodiment 3

[0039] A concrete anti-bleeding inhibitor with water reducing function, comprising the following raw materials in parts by mass: 330 parts of isopentenol polyoxyethylene ether, 55 parts of acrylic acid, 20 parts of methacrylic acid, 20 parts of acrylamide, N, 5 parts of N-dimethylacrylamide, 6.5 parts of sodium p-styrene sulfonate, 3.6 parts of polyethylene glycol 400 bismaleate, 2.1 parts of hydrogen peroxide, 3 parts of sodium persulfate, 1.2 parts of diaobai block, mercaptopropane 1.45 parts of acid, 470 parts of deionized water; Unsaturated polyether macromonomer, unsaturated carboxylic acid, unsaturated amide, unsaturated sulfonic acid or its salt and linking agent, the ratio of their amount of substance is: 1.0: 7.24:2.41:0.23:0.044.

[0040] The preparation method of the above-mentioned concrete anti-bleeding inhibitor with water reducing function comprises the following steps:

[0041] (1) 330g of isopentenol polyoxyethylene ether with a molecular weight of 2400, 20g ...

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Abstract

The invention discloses a concrete anti-bleeding inhibitor with a water reducing function and a preparation method thereof. The anti-bleeding inhibitor is mainly prepared by subjecting polyether largemonomer, unsaturated carboxylic acid, unsaturated amide, unsaturated sulfonic acid or sulfonate, a cross-linking agent, an oxidizing agent, a reducing agent, a chain transfer agent and deionized water to free radical polymerization at 15-30 DEG C through an aqueous solution, adding a sodium hydroxide solution to adjust a pH value and then supplementing water. According to the preparation method,production is conducted at normal temperature, no heat sources are needed, the equipment is simple, no pollution is generated, the production efficiency is high, and the anti-bleeding inhibitor can effectively solve the problems that existing polycarboxylic acid water reducers are poor in water retention and water absorption performance and workability, and bleeding and bottom holding are easy tooccur; the inhibitor has excellent thickening and water retention performance, and the degree of construction difficulty can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a concrete anti-bleeding inhibitor with water-reducing function and a preparation method thereof. Background technique [0002] Polycarboxylate high-performance water-reducing agent has a series of excellent properties such as high water-reducing rate, low dosage, strong adaptability, small loss, and environmental protection. It has been widely used in real estate construction, railways, highways, bridges, water conservancy and hydropower, etc. In the field of engineering, its appearance is replacing other products and gradually becoming the most widely used concrete admixture in China, adapting to the development of high-performance concrete. [0003] Although the excellent water-reducing performance of polycarboxylate superplasticizers has been widely recognized by the industry, due to changes in cement, coal ash and other silty materials, and poor aggregate gradati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F222/02C08F220/56C08F220/54C08F220/58C08F228/02C08F212/14C08F222/38C04B24/16C04B103/30
CPCC04B24/165C08F283/065C04B2103/302C08F220/585C08F212/14C08F220/58
Inventor 万甜明舒豆豆罗率何年赵元松李义
Owner SICHUAN TONGZHOU CHEM TECH
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