Modified polycarboxylate water reducer capable of improving strength of concrete

A technology of concrete strength and polycarboxylic acid, which is applied in the field of concrete admixtures, can solve the problems that affect the use of water reducers, prone to bleeding, and cracks, etc., to achieve excellent work performance, reduce bleeding, and improve early and late stages. The effect of intensity

Inactive Publication Date: 2016-10-05
ANHUI XINRUN NEW MATERIALS
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Problems solved by technology

However, problems such as bleeding, segregation, low strength, and cracks are prone to occur during the production of concrete, which affects the use of water reducing agents. These shortcomings are not explained in the article, and further modification is required.

Method used

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Embodiment Construction

[0014] A modified polycarboxylate water-reducer capable of improving concrete strength, prepared from the following raw materials in parts by weight (kg): isopentenol polyoxyethylene ether 240, acrylic acid 25.2, ammonium persulfate 1.6, thioglycolic acid 0.53 , lignin 13, a concentration of 10wt% sodium hydroxide solution in an appropriate amount, deionized water in an appropriate amount, graphene oxide 26, sodium pyrophosphate 2.5, water-based epoxy resin 2, nano-alumina 8, carbide slag 5, microcrystalline paraffin 2 , Sodium citrate 3.

[0015] Described a kind of modified polycarboxylate superplasticizer that can improve concrete strength is made by following specific steps:

[0016] (1) Add 4 times the amount of deionized water to the graphene oxide, put it into an ultrasonic oscillator for 30 minutes until the dispersion is uniform, then heat the graphene oxide dispersion in a water bath at 60°C, and slowly add lignin , stir and disperse evenly to form a mixture for use...

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Abstract

The invention discloses a modified polycarboxylate water reducer capable of improving strength of concrete. The modified polycarboxylate water reducer is prepared from, by weight, 240-250 parts of TPEG, 25.2-26.0 parts of acrylic acid, 1.6-1.65 parts of ammonium persuflate, 0.53-0.55 parts of thioglycolic acid, 13-14 parts of lignin, proper amounts of sodium hydroxide solution of 10wt% in concentration and deionized water, 26-28 parts of grapheme oxide, 2.5-3 parts of sodium pyrophosphate, 2-3 parts of waterborne epoxy resin, 8-10 parts of nano alumina, 5-6 parts of carbide slag, 2-3 parts of microcrystalline wax and 3-4 parts of sodium citrate. The modified polycarboxylate water reducer is scientific and reasonable in ingredient proportion, the water reducer which is prepared from a series of processing steps is high in water reducing rate and good in dispersity in the concrete, early strength and later strength of the concrete are improved obviously, and the water reducer is excellent in working performance, high in durability and low in bleeding rate and has good economic benefit and social benefit.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a modified polycarboxylate water reducer capable of improving concrete strength. Background technique [0002] Polycarboxylate high-performance water-reducing agent is an important component material for preparing high-performance concrete. It is widely used in high-speed railways, bridges, Nuclear power, hydropower and other key projects. However, the performance of the mother liquor of polycarboxylate high-performance water reducer is relatively single, which cannot meet the needs of concrete in different engineering fields and different performance requirements, which greatly restricts the wide application and development of polycarboxylate high-performance water reducer. Experts and scholars at home and abroad have conducted systematic research on polycarboxylic acid-based high-performance water reducers through chemical and physical modification methods, and hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/36C04B24/26C08F283/06C08F220/06C08F2/44C04B103/30
CPCC04B24/2647C04B40/0039C04B2103/302C08F2/44C08F283/065C04B14/024C04B24/24C04B18/0481C04B24/36C04B14/303C04B20/008C04B24/06C04B22/16C04B24/281C08F220/06
Inventor 朱安会马洪章
Owner ANHUI XINRUN NEW MATERIALS
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