A kind of magnesite cementitious material anti-water strengthening modifier formula and preparation method

Abstract

Belonging to the technical field of magnesite cementing modifiers, the invention puts forward a magnesite cementing material water-resistant reinforced modifier formula and a preparation method. The formula is composed of the following components by weight: 28-32 parts of water, 28-32 parts of industrial methanol, 8-12 parts of formic acid, 13-17 parts of a senior fatty acid salt, 4-7 parts of an EVA emulsion, and 8-12 parts of sodium silicate. The invention solves the technical problem of poor modification effect of magnesite cementing material modifiers in the prior art.

Description

technical field [0001] The invention belongs to the technical field of magnesite gelling modifiers, and relates to a formula and a preparation method of a water-resistant enhancing modifier for magnesite gelling materials. Background technique [0002] Magnesite cementitious material, also known as magnesite cement, is a kind of air-hardening cementitious material proposed by French scholar Sorel in 1867. Due to the rich reserves of magnesite mineral resources in my country, and the hardness of magnesite materials has fast growth, flexural resistance Good compressibility, high strength, weak alkalinity, low corrosion, high elasticity, good toughness, light weight, and good bonding performance to organic, inorganic or fiber, etc., different types of magnesite materials have been used for more than a century It has entered various fields such as urban construction, construction engineering, agricultural production, and environmental protection. However, because this material pro...

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Problems solved by technology

[0002] Magnesite cementitious material, also known as magnesite cement, is a kind of air-hardening cementitious material proposed by French scholar Sorel in 1867. Due to the rich reserves of magnesite mineral resources in my country, and the hardness of magnesite materials has fast growth, flexural resistance Good compressibility, high strength, weak alkalinity, low corrosion, high elasticity, good toughness, light weight, and good bonding performance to organic, inorganic or fiber, etc., different types of magnesite materials have been used for more than a century It has entered various fields such as urban construction, construction engineering, agricultural production, and environmental protection. However, because this material product is sensitive to environmental changes, it is easy to absorb moisture and return to halogen under high temperature and high humidity conditions, and it is accompanied by frosting and products are easy to warp. Deformation and other phenomena seriously affect the performance of the product

In order to overcome this defect, people have carried out a large number of experiments, and what have adopted the technical scheme of replacing magnesium chloride solution with magnesium sulfate solution, although the above-mentioned defect can be overcome, the strength of the product is greatly reduced, and the effect is not ideal. The maintenance program of immersing the product just after demoulding in water, but this curing will also greatly reduce the strength of the product, and it is currently prohibited in the industry to use this program to maintain magnesite products, and there are still some modifiers. Although the modification effect It is better, but the price is expensive, which reduces the competitiveness in the market. Therefore, it is a technical problem to be solved urgently to develop a magnesite cementitious material modifier with good modification effect and low cost.

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