Dry-mixed thin-layer masonry mortar

Abstract

The invention provides a preparation method of thin-layer dry-mixed mortar. Machine-made sand is selected from compression-resistant material balls and rock particles, and the compression-resistant material balls are spherical, so that the mortar has good workability and flowability; and the crushed rock particles are irregular, so that the bonding performance of the mortar is improved. A water-retaining agent effectively reduces the loss of water, so that the mortar has excellent workability. Added sepiolite and diatom stone can absorb water, serve as a carrier of the water-retaining agent and are effectively matched with the components of the mortar, so that the bonding strength of the mortar is improved. After the water in the mortar is volatilized, the water-retaining agent is cured into a special net-shaped structure, so that the bonding strength of the upper and lower surfaces of a brick body is improved. A flocculating agent is added to adjust the overall uniformity of the mortar, and meanwhile, modified carbon fibers and modified lotus root fibers are added into the flocculating agent, so that a grid structure can be formed in the mortar solidification process, and the mortar has the freeze-thaw resistance.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a dry-mixed thin-layer masonry mortar. Background technique [0002] Masonry mortar is the mortar that binds bricks, stones, blocks, etc. into masonry, which is called masonry mortar. It plays the role of bonding, padding and force transmission, and is an important part of masonry. At present, dry-mixed masonry mortar is mainly prepared with cement, natural sand, admixtures and other admixtures in a certain proportion. Due to the large internal pores of machine-made sand, impurities such as stone powder produced during the preparation process are easily mixed into the sand, resulting in The bonding strength of mortar decreases during use. Adding it to dry-mixed masonry mortar will lead to an increase in the water demand of the mortar, a decrease in the consistency of the mortar, and bleeding. It is rarely used in dry-mixed mortar. [0003] However, natural sand is a local reso...

AI Technical Summary

Problems solved by technology

At present, dry-mixed masonry mortar is mainly prepared with cement, natural sand, admixtures and other admixtures in a certain proportion. Due to the large internal pores of machine-made sand, impurities such as stone powder produced during the preparation process are easily mixed into the sand, resulting in The bonding strength of mortar decreases during use. Adding it to dry-mixed masonry mortar will lead to an increase in the water demand of the mortar, a decrease in the consistency of the mortar, and bleeding. It is less used in dry-mixed mortar.

[0003] However, natural sand is a local resource, which has the characteristics of uneven distribution, non-renewable in a short time, and unsuitable for long-distance transportation. At present, natural sand resources are close to exhaustion in many areas of my country due to over-exploitation and other reasons. At present, there are many The mining of natural sand has been prohibited or restricted in localities, which has led to the increasingly prominent contradiction between the supply and demand of engineering construction sand. The sustainable development of using machine-made sand to replace natural sand for dry-mix masonry mortar has become a green and feasible development trend.

Images