Preparation method of Yellow River mud and sand building anti-cracking, bonding and thermal insulation mortar dry material

Abstract

The invention discloses a Yellow River mud and sand building anti-cracking, bonding and thermal insulation mortar dry material and a preparation method thereof. The mortar dry material is composed ofYellow River sand, cement, fly ash, gypsum, bone meal, lignocellulose, anti-cracking fibers and a self-made adhesive. According to the Yellow River mud and sand building anti-cracking, bonding and thermal insulation mortar dry material, the raw material range of a building plastering material is expanded, the Yellow River mud and sand are independently adopted, and the bonding strength and compressive strength of plastering mortar can be achieved without cooperation with coarse sand, natural sand and other conventional sand and stone; waste is turned into wealth, and the problem that Yellow River silt deposits in rivers is solved; by selecting the components and the adding proportion of each material, the problems of cracks and hollowing in the plastering mortar are solved, and the plastering mortar has the effects of crack resistance and hollowing prevention and is good in bonding performance; the mortar is low in water consumption, short in setting time, free of layering during plastering, high in water retention rate, high in bonding strength and compressive strength, low in shrinkage rate, resistant to freezing and permeation and good in heat preservation performance.

Description

[0001] This application is a divisional application. The original application is Liu Zhaorui's patent application "An anti-cracking, bonding, thermal insulation mortar dry material and its preparation method for the application of Yellow River mud and sand construction". The original application number is 201711095183.X, and the original application date is 2017.11 .09. technical field [0002] The invention relates to the technical field of building materials, in particular to a method for preparing a crack-resistant, bonding and heat-preserving mortar dry material used in Yellow River mud sand buildings. Background technique [0003] 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. ; Usually the fineness modulus of construction sand is 3.7 to 1.6, and a small number of coarse sand and fine sand are used in a mixture of 4:1. Yellow River silt is also call...

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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 the maximum mud content of 2% 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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