A kind of wet-mixed mortar and its preparation method and application

Abstract

The application relates to the field of building materials, and specifically discloses a wet-mixed mortar and its preparation method and application. A wet-mixed mortar includes the following raw materials in parts by weight: 280-320 parts of cement, 70-90 parts of fly ash, 1320-1480 parts of river sand, 140-180 parts of drinking water, 5-15 parts of mortar superplasticizer, water retention The water retaining agent includes butyl acrylate, industrial alkali residue and sulfur-fixing ash, and the weight ratio of the three is 1: (4-6): (2-4). The wet-mixed mortar of the present application can be used for plastering indoor walls or outdoor walls, and has the advantages of increasing the water retention rate of the mortar, reducing the moisture absorbed by the aerated concrete blocks, reducing cracking of the plastering layer, and improving the quality of the plastering layer.

Description

technical field [0001] The present application relates to the field of building materials, more particularly, it relates to a wet-mixed mortar and its preparation method and use. Background technique [0002] Wet-mixed mortar refers to cement, sand, water-retaining and thickening materials, fly ash or other mineral admixtures, admixtures and water in a certain proportion after being measured and mixed in a centralized mixing station, and then transported by mixer trucks to Place of use, put it in a sealed container for storage, and use up the mortar mixture within the specified time. [0003] In the related art, the Chinese invention patent application with the publication number CB105776989A discloses a new type of wet-mixed mortar, which includes the following components in weight percentages: gas-setting hydraulic portland cement: 150kg / m 3 ~250kg / m 3 ; fly ash: 40kg / m 3 ~150kg / m 3 ; Machine-made sand: 1280kg / m 3 ~1300kg / m 3 ; Water: 184kg / m 3 ~276kg / m 3 . [000...

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Problems solved by technology

[0005] In view of the above-mentioned related technologies, the inventor believes that: because the moisture of the mortar is easily absorbed by the aerated concrete blocks, the mortar of the plastering layer is not condensed, and cannot resist the tensile stress caused by volume shrinkage, which leads to cracking of the plastering layer, which in turn leads to poor quality of the plastering layer. decline

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