A kind of Yellow River mud mortar building plaster dry material and preparation method thereof

Abstract

The invention discloses a building plastering dry material of Yellow River mud mortar and a preparation method thereof, wherein the building plastering dry material of Yellow River mud mortar is composed of the following raw materials in parts by weight: 65-80 parts of Yellow River sand, 20-25 parts of cement , 8 to 12 parts of fly ash, 3 to 8 parts of gypsum and 5 to 15 parts of self-made adhesive; the Yellow River mud mortar building plastering dry material of the present invention expands the raw material scope of building plastering materials, and adopts Yellow River mud mortar alone Mud and sand can achieve the bonding strength and compressive strength of plastering mortar without coordinating conventional sand and gravel such as coarse sand and natural sand; and turning waste into treasure solves the problem of Yellow River mud and sand silting up the river course; the building plastering of the present invention is dry Through the selection of the composition and addition ratio of each material, the material overcomes the problem of cracks and hollows in traditional plastering mortars, and has the effect of anti-cracking anti-air drums; the water consumption is small, the consistency is moderate, the setting time is short, and the plastering is not layered. High water retention rate, high bond strength and compressive strength, low shrinkage, good frost resistance and impermeability.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a dry building plastering material of Yellow River mud mortar and a preparation method thereof. Background technique [0002] For a long time, the sand used in construction mortar has been divided into four specifications according to the fineness modulus: coarse, medium, fine, and extra fine. The fineness modulus is 3.7~3.1, 3.0~2.3, 2.2~1.6, 1.5~0.7 ;Usually the fineness modulus of construction sand is 3.7~1.6, and a few of them are mixed with coarse sand and fine sand according to the quality of 4:1. Yellow River silt is also called Yellow River surface sand, Yellow River ultra-fine sand. Since the modulus of the sand is only 0.7, which is much lower than the modulus requirements of ordinary concrete, the texture is fine, and the sand has a high mud content, generally around 5.8%. The block content is 10.2%, which is far higher than the maximum mud content of 5% and...

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Problems solved by technology

Yellow River silt is also called Yellow River surface sand, Yellow River ultra-fine sand. Since the modulus of the sand is only 0.7, which is much lower than the modulus requirements of ordinary concrete, the texture is fine, and the sand has a high mud content, generally around 5.8%. The block content is 10.2%, which is far higher than the maximum mud content of 5% and 2% of the maximum mud content in the sand used for concrete preparation in my country. Due to the high mud content and high water absorption of the sand, it is easy to cause damage to buildings. Cracking, in principle, does not meet the construction requirements of concrete. At present, it is generally used to add a large amount of coarse sand, natural sand or artificial sand to increase the physical and mechanical properties and durability of the Yellow River mud mortar. It cannot be used alone as a concrete sandstone material.

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