High-temperature-resistant super retarder with favorable dispersibility and preparation method thereof

Abstract

The invention relates to a high-temperature-resistant super retarder with favorable dispersibility and a preparation method thereof. The invention aims to provide a high-temperature-resistant super retarder with favorable dispersibility adaptable to high temperature in summer and a preparation method thereof. The high-temperature-resistant super retarder with favorable dispersibility comprises the following components in parts by weight: 300-450 parts of organophosphorous acid or organic phosphorus salt, 150-300 parts of dispersant and 15-25 parts of surfactant. The preparation method comprises the following steps: proportionally adding raw materials into a reaction kettle, uniformly mixing and stirring, adding 300-400 parts by weight of water, and dissolving by stirring to obtain the product. The high-temperature-resistant super retarder provided by the invention solves the problem of high temperature adaptability of the retarder, is convenient for construction in summer, can adapt to multiple water reducers, is applicable to C40 above high-strength concrete, can prolong the retention time of concrete flowability by more than 0.5 hour, is convenient for concrete transportation, and has the advantages of simple production technique and low cost.

Description

technical field [0001] The invention relates to a super retarder for building construction, in particular to a high temperature resistant super retarder with good dispersion performance and a preparation method thereof. Background technique [0002] Retarder is an admixture that delays the setting time of concrete without significantly affecting the later strength. In the prior art, commonly used concrete retarders are divided into two categories: inorganic and organic. [0003] Inorganic retarders mainly include borax, zinc oxide, phosphate and metaphosphate, etc., as the patent document "Preparation method of a powdery gypsum retarder" with the authorization number CN101891410B discloses that citric acid and borax are used as the main A set retarder prepared by retarding component and ash calcium powder as a modified reinforcing agent. [0004] Organic retarders mainly include lignosulfonates, hydroxycarboxylic acids (salts), sugars and carbohydrates, polyols and their d...

AI Technical Summary

Problems solved by technology

[0006] 1. The amount of inorganic retarder is large, and with the increase of the amount, it has little effect on the setting time of concrete, but it greatly reduces the strength of concrete;

[0007] 2. The amount of organic retarder is small, and the setting time is long, but the range of the amount is small, and the setting time fluctuates greatly with the change of the amount. When the amount exceeds a certain value, the concrete will have problems such as abnormal condensation and strength decline.

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