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Saltpetering-resistant concrete with automatic shrinkage compensation function

A technology of automatic shrinkage and efflorescence resistance, applied in the field of building materials, can solve the problems of concrete cracking and increase in shrinkage rate, and achieve the effect of reducing porosity, improving the degree of dispersion, and improving efflorescence resistance.

Active Publication Date: 2020-12-29
杭州瑞鼎建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the concrete cracking problem caused by the increase of shrinkage rate while the anti-pan-alkali of concrete is improved, this application provides an anti-pan-alkalized concrete with automatic shrinkage compensation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0033] An anti-pantherine agent, prepared by the following process:

[0034] P1. Put carboxymethyl cellulose and water into the reaction kettle according to the mass ratio of 1: 30, heat and stir. When the temperature is stable at 84°C, add potassium persulfate and carboxymethyl cellulose With the mass ratio of total potassium persulfate is 1: 2.56;

[0035] P2, adding polyethylene glycol monomethyl ether after reacting for 15 minutes, the mass ratio of carboxymethyl cellulose and polyethylene glycol monomethyl ether is 1:6;

[0036] P3. After reacting for 0.8h, add the remaining potassium persulfate, add salicylic acid after 10min, the mass ratio of carboxymethyl cellulose and salicylic acid is 1: 2, and react for 3h to obtain an emulsion-like anti-pantherine agent.

preparation example 2

[0038] An anti-pantherine agent, prepared according to the preparation method of Preparation Example 1, the difference is that the mass ratio of carboxymethyl cellulose to salicylic acid is 1:4.

preparation example 3

[0040] An anti-pantherine agent, prepared according to the preparation method of Preparation Example 1, the difference is that the mass ratio of carboxymethyl cellulose to salicylic acid is 1:6.

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PUM

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Abstract

The invention relates to the field of building materials, and particularly discloses saltpetering-resistant concrete with an automatic shrinkage compensation function. The saltpetering-resistant concrete with the automatic shrinkage compensation function is prepared from the following raw materials: cement, a filling material, an saltpetering-resistant agent, mineral powder, fine aggregate, coarseaggregate and water, wherein the saltpetering-resistant agent is prepared from carboxymethyl cellulose grafted polyethylene glycol monomethyl ether and salicylic acid; the preparation method comprises the steps of weighing and mixing. The concrete has the following effects that the shrinkage rate is remarkably reduced while the efflorescence resistance of the concrete is remarkably improved, andthe concrete has the advantage of automatic shrinkage compensation.

Description

technical field [0001] This application relates to the field of building materials, more specifically, it relates to an anti-efflorescence concrete with automatic shrinkage compensation. Background technique [0002] The main component of concrete is silicate, and the moisture in the air will undergo hydrolysis reaction with silicate along the pores of the concrete, and the generated hydroxide and Na in the concrete will + , Ca 2+ Such metal ions combine to form hydroxides with low solubility. As the temperature rises, water vapor evaporates, and hydroxides precipitate on the surface of concrete cement to form large white substances. This process is efflorescence; efflorescence causes the paint on the concrete surface to be lifted , cannot be firmly bonded to concrete. [0003] A common method to control the efflorescence problem is to use a water reducing agent as an anti-efflorescence agent, and reduce the porosity of the concrete by reducing the amount of water, thereby...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B28/22C04B103/60C04B111/20
CPCC04B40/0046C04B28/186C04B2103/603C04B2201/50C04B2111/2023C04B24/383C04B24/04C04B7/00C04B18/08C04B14/106C04B22/002C04B14/06C04B14/068C04B14/02
Inventor 费慨周福久张杰龚万贯
Owner 杭州瑞鼎建材有限公司
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