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Concrete water reducing agent and preparation method thereof

A concrete water-reducing agent and water-reducing agent technology, applied in the field of concrete production, can solve problems such as performance reduction, influence of concrete bonding time, general water-reducing effect, etc., to improve workability and durability, and reduce the probability of shrinkage cracking , the effect of good retarding effect

Inactive Publication Date: 2019-04-23
广州华隆建筑材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water reducing agents currently used in the market have more or less large dosage, poor water reducing performance, poor plasticizing effect, single function, easy to deteriorate, easy to grow mold and deteriorate during storage and transportation, and then emit foul smell. The disadvantages ranging from reduced performance to complete loss of efficacy cannot meet the requirements of the market
The existing concrete water reducing agent has a general water reducing effect, and it has a negative impact on the concrete bonding time

Method used

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Examples

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Effect test

preparation example Construction

[0025] The preparation method of the modified kaolin is as follows: calcining the kaolin at 300°C for 2 hours to obtain calcined kaolin, mixing the calcined kaolin and maleic anhydride in water evenly, and stirring under reflux at 100°C for 30 minutes in a microwave reactor microwave process , and then centrifuged, separated, and dried to obtain modified kaolin.

[0026] In this embodiment, the preparation method of the concrete water reducing agent, the steps are as follows:

[0027] 1) take each raw material by proportioning;

[0028] 2) Water reducer mother liquor, hydroquinone, p-toluenesulfonic acid, sodium methacrylate, sodium gluconate, triterpene saponins, chitin, ammonium citrate, isopropanol, modified kaolin, water Put into the stirring tank whose rotating speed is 900r / min and mix and stir for 10min;

[0029] 3) Add defoamer to the mixing tank, mix and stir for 5 minutes;

[0030] 4) Add anti-cracking agent into the mixing tank and mix well to obtain the required...

Embodiment 2

[0032] In the embodiment of the present invention, a concrete water reducer includes the following raw materials in parts by weight: 62 parts of water reducer mother liquor, 0.3 parts of anti-cracking agent, 5 parts of hydroquinone, 2.5 parts of p-toluenesulfonic acid, methyl 1.5 parts of sodium propylene sulfonate, 2.2 parts of sodium gluconate, 0.2 parts of triterpenoid saponins, 3.5 parts of chitin, 12 parts of ammonium citrate, 1.5 parts of defoamer, 6 parts of isopropanol, 6 parts of modified kaolin, 82 parts of water share.

[0033] Wherein, the water reducer mother liquor includes the following raw materials in parts by weight: 6 parts of hydroxyethyl methacrylate, 22 parts of sodium methacrylate, and 13 parts of sodium dodecylbenzenesulfonate.

[0034] The anti-cracking agent is composed of methacrylic acid, hydrogen peroxide, vitamins and maltodextrin in a mass ratio of 1:0.2:1:1.

[0035] The defoamer is a polyether defoamer.

[0036] The preparation method of the ...

Embodiment 3

[0043] In the embodiment of the present invention, a concrete water reducer includes the following raw materials in parts by weight: 65 parts of water reducer mother liquor, 0.4 parts of anti-cracking agent, 6 parts of hydroquinone, 3 parts of p-toluenesulfonic acid, methyl 2 parts of sodium propylene sulfonate, 2.5 parts of sodium gluconate, 0.3 parts of triterpene saponins, 4 parts of chitin, 15 parts of ammonium citrate, 2 parts of defoamer, 8 parts of isopropanol, 7 parts of modified kaolin, 85 parts of water share.

[0044] Wherein, the water reducer mother liquor includes the following raw materials in parts by weight: 7 parts of hydroxyethyl methacrylate, 25 parts of sodium methacrylate, and 14 parts of sodium dodecylbenzenesulfonate.

[0045] The anti-cracking agent is composed of methacrylic acid, hydrogen peroxide, vitamins and maltodextrin in a mass ratio of 1:0.2:1:1.

[0046] The defoamer is a silicone defoamer.

[0047] The preparation method of the modified ka...

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Abstract

The invention discloses a concrete water reducing agent, which relates to the technical field of production of concrete, and aims at solving the problems that the existing water reducing agent has adverse impact for the coagulation time of the concrete. The concrete water reducing agent is prepared from the following raw materials: water reducing agent mother liquor, an anti-cracking agent, hydroquinone, p-toluenesulfonic acid, sodium methacrylate sulfonate, sodium gluconate, triterpene saponin, chitin, ammonium citrate, a defoaming agent, isopropanol, modified kaolin and water. The inventionalso discloses a preparation method of the concrete water reducing agent. According to the water reducing agent prepared by the invention, the anti-cracking agent is added, so that the water loss speed of the newly poured concrete surface can be slowed down, the water loss speed of the newly poured concrete surface is not greater than the bleeding speed, and the shrinkage and cracking probabilityof the concrete can be effectively reduced; and the bonding strength of cement can be improved, the compressive and flexural properties of concrete can be enhanced, and the prepared concrete water reducing agent has good retarding effect. The concrete is short in coagulation time, high in strength, good in construction performance and high in practical value.

Description

technical field [0001] The invention relates to the technical field of concrete production, in particular to a concrete water reducer and a preparation method thereof. Background technique [0002] Concrete, referred to as "concrete" for short: refers to the collective name of engineering composite materials in which aggregates are cemented into a whole by cementitious materials. Generally speaking, the term concrete refers to the cement concrete obtained by using cement as the cementitious material, sand and stone as the aggregate; mixed with water (may contain admixtures and admixtures) in a certain proportion, and stirred. Concrete, which is widely used in civil engineering. [0003] Water reducer is one of many additives, and it is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete basically unchanged. Most of them are anionic surfactants, such as lignosulfonate, naphthalenesulfonate formaldehyde polymer, etc. After...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B24/38C04B103/30C04B103/60
CPCC04B40/0039C04B2103/302C04B2103/60C04B24/38C04B24/10C04B24/06C04B24/02C04B22/00C04B24/16C04B24/20C04B24/045C04B24/04C04B22/068C04B24/383C04B24/42C04B2103/0041C04B24/32
Inventor 李雪清
Owner 广州华隆建筑材料有限公司
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