A kind of concrete retarder and preparation method thereof

A technology of concrete and setting retarder, which is applied in the field of concrete admixtures to achieve the effects of increasing compressive strength, high compressive strength and increasing retardation time

Active Publication Date: 2021-08-31
英德市竣冠新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its retarding effect and 3D compressive strength still limit its use under some special conditions.

Method used

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  • A kind of concrete retarder and preparation method thereof
  • A kind of concrete retarder and preparation method thereof
  • A kind of concrete retarder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The preparation process of the first retarding component is as follows:

[0031] Add corn stalks to 55% acetic acid solution, soak them at 60°C for 3 hours, dry and pulverize them to obtain straw fibers; then mix the obtained straw fibers with water at a mass ratio of 1:200, and place them in an ultrasonic Ultrasonic dispersion in the machine for 30 minutes to obtain the first raw material;

[0032] Stir the sodium hydroxide and water evenly according to the ratio of mass ratio of 1:10, add acrylic acid to the evenly stirred sodium hydroxide solution to obtain a sodium acrylate solution, and obtain a second raw material;

[0033] Then uniformly mix the weighed acrylamide, N-(methylol)acrylamide and water according to a certain ratio to obtain the third raw material;

[0034] uniformly mixing the first raw material, the second raw material, and the third raw material to obtain a mixed liquid;

[0035] Put the mixed solution in the reaction kettle, control the heating t...

no. 1 example

[0047] The concrete retarder that the first embodiment of the present application provides, described concrete retarder comprises the first retarder component, the second retarder component, zinc sulfate;

[0048] Wherein, the weight ratio of the first retarding component, the second retarding component, and zinc sulfate is 10:1:0.1;

[0049] The preparation process of the first retarding component and the second retarding component is as follows:

[0050] Add 1 kg of corn stalks to 55% acetic acid solution, soak at 60°C for 3 hours, dry and pulverize to obtain straw fibers; then mix the obtained straw fibers with water at a mass ratio of 1:200, place in Ultrasonic dispersion in an ultrasonic machine for 30 minutes to obtain the first raw material;

[0051] Stir 100g of sodium hydroxide and water evenly according to the mass ratio of 1:10, add 50g of acrylic acid to the evenly stirred sodium hydroxide solution to obtain a sodium acrylate solution, and obtain a second raw materi...

no. 2 example

[0059] The concrete retarder that the second embodiment of the present application provides, described concrete retarder comprises the first retarder component, the second retarder component, zinc sulfate;

[0060] Wherein, the weight ratio of the first retarding component, the second retarding component, and zinc sulfate is 10:4:0.1;

[0061] The preparation process of the first retarding component and the second retarding component is as follows:

[0062] Add 1 kg of corn stalks to 55% acetic acid solution, soak at 60°C for 3 hours, dry and pulverize to obtain straw fibers; then mix the obtained straw fibers with water at a mass ratio of 1:200, place in Ultrasonic dispersion in an ultrasonic machine for 30 minutes to obtain the first raw material;

[0063] Stir 100g of sodium hydroxide and water evenly according to the mass ratio of 1:10, add 50g of acrylic acid to the evenly stirred sodium hydroxide solution to obtain a sodium acrylate solution, and obtain a second raw mat...

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Abstract

The invention belongs to the technical field of concrete admixtures, in particular to a concrete retarder and a preparation method thereof. The first aspect of the present invention provides a concrete retarder, the concrete retarder includes the first retarder component, the second retarder component, zinc sulfate; wherein, the first retarder component, The second retarding component, the weight ratio of zinc sulfate is 10: (1-4): (0.1-1); The particle size ratio of the first retarding component and the second retarding component is ( 3-10): 1. The second aspect of the present invention provides the preparation method of the above-mentioned concrete retarder, comprising the following steps: S1: placing the second retarder component in water at normal temperature for 2-5 minutes; S2: treating the first The retarding component, the second retarding component and the zinc sulfate are uniformly mixed in proportion to obtain the concrete retarder.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular to a concrete retarder and a preparation method thereof. Background technique [0002] Set retarder, Set Retarder, is an additive that reduces the hydration speed and heat of hydration of cement or gypsum, and prolongs the setting time. The purpose of adding retarder in commercial concrete is to prolong the hydration and hardening time of cement, so that fresh concrete can maintain plasticity for a long time, thereby adjusting the setting time of fresh concrete. Retarders are classified according to their structures, mainly in the following categories: (1) sugars: calcium sugar, gluconate, etc.; (2) citric acid, tartaric acid and their salts; (3) zinc salts, phosphates; (4) ) lignosulfonate. [0003] Cement concrete is an indispensable construction material in modern construction projects. Its performance is affected and affected by various admixtures, so as to meet th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/12C04B103/22
CPCC04B40/0039C04B2103/22C04B18/248C04B22/062C04B24/04C04B24/124C04B22/14C04B24/10
Inventor 彭材大
Owner 英德市竣冠新型材料有限公司
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