尾矿砂制备装配式预制保温墙体性能分析

针对我国目前尾矿的环境污染问题,利用尾矿砂作为主要原料制备加气混凝土,通过正交试验设计(L_9(3~4)),运用权矩阵分析不同配比条件下加气砌块的干密度和力学性能.结果表明:水泥用量为150g,石灰用量为96g,尾矿砂用量为420g,水料质量比为0.55时,加气混凝土的性能最优.采用自主研发的稳态平板导热仪测量砌块导热系数,实验结果说明砌块保温性能较好,可用于制备装配式预制保温墙体.最后,对仪器的实用性、创新性以及热电偶标定技术的精确性进行了验证.

Performance Analysis of Prefabricated Insulating Walls Made by Tail Sand Blocks

In order to solve the problem of environmental pollution in tail sand by China,the aerated concrete was prepared by using tail sand as the main raw material.The orthogonal test design (L₉ (3⁴)) was used to analyze the dry density,mechanical properties and thermal insulation properties of aerated blocks under different matching conditions.The results show that when the cementing capacity is 150 g,the amount of lime is 96 g,the tail sand is 420 g and the ratio of water to material is 0.55,the performance of the aerated concrete is the best.Its thermal conductivity was measured by the steady plate method for practical engineering reference.The experimental results show that the heat preservation performance of aerated blocks is good and can be used to prepare prefabricated walls.The instrument''s practicality,innovativeness and the accuracy of the thermocouple calibration technology were verified.