Concrete water-retaining agent

Abstract

The invention belongs to the technical field of concrete admixtures, in particular to a concrete water-retaining agent, made from the following materials according to parts by weight: 30-50 parts of hydroxypropyl methylcellulose, 10-18 parts of diatomaceous earth, 5-15 parts of glyceryl monostearate, 3-15 parts of calcium sulfoaluminate and 2-10 parts of alkyl glycoside. The concrete water-retaining agent of the invention has high water-retaining rate and stable properties and can improve the strength, cracking resistance and durability of concrete.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular to a concrete water-retaining agent. Background technique [0002] Cement needs enough water to react with it in the hardening process to ensure the strength of the cement. It is generally required that the freshly finished concrete needs to be watered and cured for more than 7 days. However, in many practical projects, it is often impossible to do watering and curing for 7 days, and the water on the surface of the cement evaporates relatively quickly. If the water in the concrete is not retained, the strength of the cement will inevitably be affected. The traditional method of concrete water retention is to add an appropriate amount of cellulose. Cellulose has a certain water retention effect, but the effect is not good. At present, there are also curing agents that play a role in water retention on the market, such as organosilicon curing agents. The mechanism of ac...

AI Technical Summary

Problems solved by technology

In this way, the curing agent needs to be constructed separately, and the process is complicated.

In addition, the existing water-retaining agent compound still has poor stability, and there are phenomena such as delayed bleeding and segregation

[0003] In addition, with the widespread use of admixtures, the water-cement ratio is getting smaller and smaller, and there is very little free water in concrete, which is prone to plastic shrinkage in engineering, resulting in surface cracking; raw material factors such as cement dosage and fineness increase further In addition, due to environmental factors such as construction temperature and wind speed, and construction factors such as untimely maintenance, the probability of concrete cracks is further aggravated