Low-dust dry-mixed mortar composition and preparation method thereof

Abstract

The invention discloses a low-dust dry-mixed mortar composition, which is made of the following components by weight: 20-40 parts of cement base material, 50-65 parts of inorganic fine aggregate, 5-15 parts of mineral admixture, 0.1-0.3 parts of fibrous filler, 0.1-0.3 parts of cellulose ether, 0.2-0.5 parts of retarder, 1-6 parts of redispersible latex powder, 0.02-0.1 part of polyvinyl alcohol, 0.02-0.1 part of polyacrylamide, 0.01‑0.05 parts of modified starch and 0.1‑0.3 parts of mineral oil defoamer and 2‑6 parts of water. The mortar composition produces less PM2.5 during transportation and adding water. The invention also discloses a preparation method of the mortar composition. During the preparation process, the dust suppression components are evenly distributed and the mortar mixing uniformity is high.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a low-dust dry-mixed mortar composition and a preparation method thereof. Background technique [0002] Mortar is a bonding substance used for bricklaying in buildings. It is composed of a certain proportion of inorganic aggregate and cementing material plus water. It is also called mortar or mortar. Inorganic aggregates are generally inert fillers, including aggregates or sand; cementing materials are usually hydraulic materials with bonding properties, such as cement, slag, kaolin, silica fume, limestone, rock ash, etc. The cementing material is usually uniform Powdery, light weight. [0003] In the process of transportation and construction, materials need to be mixed, and the cemented materials are easy to fly into the air, resulting in a large amount of dust, which poses a greater health threat to construction workers and nearby residents, and has a negative impa...

AI Technical Summary

Problems solved by technology

[0005] 1) Add water or solvent to make the dust gather, but this method can only reduce the dust that has already been produced, and treat the symptoms but not the root cause;

[0006] 2) Use organic liquid additives as anti-dust additives, including hydrocarbon organic substances, polyols or aliphatic oil organic substances, but such hydrocarbon-based oils are easy to cause case accidents in case of fire, and there is a greater risk of inhalation health threats

[0008] Most of the mortars currently on the market are usually wet-mixed, and the process of adding water is accompanied by heat generation and generates a lot of dust.

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