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Concrete admixture as well as preparation method and application thereof

A technology of concrete admixture and water reducing agent, applied in the field of concrete materials, can solve the problems of easy occurrence of concrete engineering quality accidents and large loss of concrete over time, achieve high application and promotion value, avoid rapid setting or false setting phenomenon, delay The effect of hydration speed

Inactive Publication Date: 2021-05-28
马永胜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, because the active powder material in concrete will generate a higher temperature during the calcination or grinding process (cement or mineral admixture), the powder has not been precipitated, and it can be used immediately after leaving the factory, and it is directly mixed with other materials in the concrete. When the raw materials are mixed with water, the ready-mixed concrete will appear rapid setting or false setting phenomenon due to high temperature during transportation or construction, resulting in excessive loss of concrete over time, and accidents of concrete and engineering quality are very easy to occur

Method used

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  • Concrete admixture as well as preparation method and application thereof
  • Concrete admixture as well as preparation method and application thereof
  • Concrete admixture as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A concrete admixture, comprising the following components by weight: 10 parts of polycarboxylate superplasticizer, 0.1 part of ε-polylysine hydrochloride, 0.1 part of sodium starch octenyl succinate, 0.4 part of glycerin, containing 1 part of alkenyl and sulfonic acid modified sorbitol and 80 parts of water.

[0025] Among them, the polycarboxylate superplasticizer is BASF (BASF) polycarboxylate superplasticizer RHEOPLUS 411 of Shanghai Kaiyin Chemical Co., Ltd.;

[0026] The preparation method of the modified sorbitol containing alkenyl and sulfonic acid group is: add glucose and sodium bisulfite to react in water, generate the reaction solution containing sorbitol sulfonate; Add aluminum oxide in the reaction solution, at 150 °C to react to obtain the modified sorbitol containing alkenyl and sulfonic acid groups. The adding amount of described water makes glucose and NaHSO 3 can be completely dissolved, the Al 2 o 3 The mass ratio to the glucose is 1:0.2.

[0027...

Embodiment 2

[0030] A concrete admixture, comprising the following components by weight: 20 parts of polycarboxylate superplasticizer, 0.4 part of ε-polylysine hydrochloride, 0.5 part of sodium starch octenyl succinate, 0.6 part of glycerin, containing Alkenyl and sulfonic acid modified sorbitol 3 parts and water 85 parts.

[0031] Among them, the polycarboxylate superplasticizer is BASF (BASF) polycarboxylate superplasticizer RHEOPLUS 411 of Shanghai Kaiyin Chemical Co., Ltd.;

[0032] The preparation method of the modified sorbitol containing alkenyl and sulfonic acid groups is: adding glucose and sodium bisulfite to react in water to generate a reaction solution containing sorbitol sulfonate; adding aluminum oxide to the reaction solution, at 160 °C to react to obtain the modified sorbitol containing alkenyl and sulfonic acid groups. The adding amount of described water makes glucose and NaHSO 3 can be completely dissolved, the Al 2 o 3 The mass ratio to the glucose is 1:0.5.

[00...

Embodiment 3

[0036] A concrete admixture, comprising the following components by weight: 15 parts of polycarboxylate superplasticizer, 0.2 part of ε-polylysine hydrochloride, 0.3 part of sodium starch octenyl succinate, 0.5 part of glycerin, containing Alkenyl and sulfonic acid modified sorbitol 2 parts and water 82 parts.

[0037] Among them, the polycarboxylate superplasticizer is BASF (BASF) polycarboxylate superplasticizer RHEOPLUS 411 of Shanghai Kaiyin Chemical Co., Ltd.;

[0038] The preparation method of the modified sorbitol containing alkenyl and sulfonic acid group is: add glucose and sodium bisulfite to react in water, generate the reaction solution containing sorbitol sulfonate; Add aluminum oxide in the reaction solution, at 155 °C to react to obtain the modified sorbitol containing alkenyl and sulfonic acid groups. The adding amount of described water makes glucose and NaHSO 3 can be completely dissolved, the Al 2 o 3 The mass ratio to the glucose is 1:0.3.

[0039]The ...

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Abstract

The invention relates to the technical field of concrete materials, and particularly discloses a concrete admixture as well as a preparation method and application thereof. The concrete admixture is prepared from the following components in parts by weight: 10-20 parts of a water reducing agent, 0.1-0.4 part of epsilon-polylysine hydrochloride, 0.1-0.5 part of starch sodium octenylsuccinate, 0.4-0.6 part of glycerol, 1-3 parts of modified sorbitol and 80-85 parts of water. The concrete admixture can be used as an admixture of premixed concrete and special concrete. When the concrete admixture provided by the invention is applied to the condition of a high-temperature powder material, the phenomenon of rapid setting or false setting of concrete is avoided, the mechanical property and durability of the hardened concrete are ensured while the normal setting time of the concrete and the small time loss of the concrete are ensured, and the concrete admixture has extremely high application and popularization values.

Description

technical field [0001] The invention relates to the technical field of concrete materials, in particular to a concrete admixture and its preparation method and application. Background technique [0002] Concrete is the most important building material in the construction industry. It has the advantages of abundant raw materials, low price, advanced technology, high strength, good durability, and small deformation performance. Ready-mixed concrete refers to the concrete that is produced at the mixing station and delivered to the place of use through transportation equipment, and is a mixture when delivered. Concrete raw materials will undergo chemical reactions over time after being mixed with water, which will have adverse effects on the workability of concrete, the compatibility of admixtures and other raw materials, and the construction. Therefore, ready-mixed concrete needs to It is transported to the required construction site within a short period of time, and at the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B28/00
CPCC04B40/0039C04B28/00C04B2201/50C04B2103/302C04B24/38C04B24/026C04B24/06C04B24/28C04B18/08C04B14/06
Inventor 马永胜殷继伟李虎成彭喜庄凯群杨悦宾张益豪任林燕李金君臧术勇张浩
Owner 马永胜