Preparing method for aminosulfonic water-reducing agent

Abstract

The invention is about preparation method of amino sulfoacid water reducing agent. The part by weight of different component is 200 portion of water, 30-50 portion of phenol, 60-90 portion of diamino benzene sulfonic acid or diamino benzene sulfonate, 0-10 portion of urea. The reactor is heating-up to 50-90deg.C, and condensating agent formaldehyde is 50-70portion. Stirred after 4-8 hours, 1-10 portion of alkalinous conditioning agent and 0-2 portion of triethanolamine is added. Stired until it is to room-temperature, then the liquid water reducing agent is gaine. In the invention, diamino benzene sulfonic acid can be sulfanilic acid, diamino benzene sulfonate can be p-amino benzene sulfonate. The water reducing agent has high reducing rate, can control the loss of slump constant, and has high applied value.

Description

technical field [0001] The invention relates to a water reducing agent for concrete and mortar, in particular to a water reducing agent with a high water reducing rate. Background technique [0002] The application of concrete admixture not only improves the workability and performance of cement concrete after hardening, but also saves cement and reduces energy consumption. According to statistics, the use of high-efficiency water reducers can save more than 10% to 20% of cement under the same strength. From the perspective of concrete mixing and molding, every ton of high-efficiency water reducer can save four tons of coal. In recent years, due to the remarkable progress of concrete technology and design methods, concrete structures tend to be large-scale and high-strength. In order to make concrete achieve high strength, high durability and high fluidity, that is to say, to achieve high performance, high-efficiency water reducing agents must be mixed into concrete. High...

AI Technical Summary

Problems solved by technology

Lignin-based superplasticizers have a certain water-reducing effect and considerable air-entraining and retarding properties, which are likely to cause excessive retardation;