Thermal-insulation mortar dry material having cracking resistance and caking property and applied to Yellow River silt buildings and preparation method of dry material

Abstract

The invention discloses a thermal-insulation mortar dry material having cracking resistance and caking property and applied to Yellow River silt buildings and a preparation method of the dry material.The mortar dry material is composed of Yellow River silt, cement, fly ash, gypsum, bone powder, lignocellulose, anti-crack fiber and a self-made adhesive. The thermal-insulation mortar dry material having cracking resistance and caking property and applied to Yellow River silt buildings expands the raw material range for building plaster materials, and can achieve the caking strength and compressive strength of plastering mortar by singly using the Yellow River silt without cooperation of conventional sand such as coarse sand and natural sand. Waste is changed into treasures, and the problemof siltation of the Yellow River silt in the Yellow River is solved. The dry material of the present invention overcomes the problems of cracks and hollow bulges in plastering mortar through selectionof the composition and the addition ratio of all raw materials, has the effects of resisting cracking and hollow bulges, is good in caking performance, small in water consumption and short in settingtime, does not cause delamination of plaster, and has high water retention, high caking strength, compressive strength, low shrinkage, resistance to freeze, resistance to seepage, and good insulationproperties.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a dry material of anti-cracking, bonding, and heat-retaining mortar used in Yellow River mud sand buildings 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...

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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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