Plastering mortar prepared by using construction wastes and phosphogypsum

Abstract

The invention relates to a plastering mortar, which is mainly prepared from the following raw materials in percentage by mass: 10 to 20 percent cement, 20 to 30 percent modified phosphogypsum, 20 to 30 percent of construction wastes, 30 to 40 percent of sand, and 3 to 5 percent of exciting agent. A method for preparing the plastering mortar comprises the steps of preparing the modified phosphogypsum, preparing construction waste powder, preparing the exciting agent and preparing a final product. The plastering mortar is of great significance for efficiently utilizing the construction wastes, reducing pollutions caused by solid wastes to the environment and reducing the production cost, and simultaneously the plastering mortar has the advantage of low cost and high strength.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a plastering mortar prepared by using construction waste and phosphogypsum. Background technique [0002] Plastering mortar is widely used as a common dry-mixed mortar. Plastering has a construction area of ​​3-5m2 per square meter in general civil buildings. 2 The inner surface is plastered, with a thickness of 0.15-0.75m 2 The exterior is plastered. The cost of plastering accounts for about 10% to 15% of the total construction cost, and about 30% to 40% of the total construction period in terms of construction period. earth influence. In the actual construction process, problems such as poor workability and cracking of plastering mortar often occur. When producing plastering mortar, most of the raw materials used are natural minerals, which makes the production cost high. In terms of utilization of industrial waste residues, often due to the low activity of ind...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of traditional plastering mortar such as poor construction performance, poor water retention, low bonding strength and easy cracking, Xu Peng developed a plastering mortar by studying the effects of water retaining agent, starch ether, water repellent and polypropylene fiber on the performance of plastering mortar. A new type of plastering mortar with good construction performance, good water retention, low shrinkage, high bonding strength, and not easy to crack, and the improvement mechanism of the admixture was discussed (see literature: Xu Pengxin. Development of anti-cracking plastering mortar [J ]. Concrete. 2009, (6): 106-109.)

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