新型建筑保温隔热材料的实验研究

摘要

A new thermal insulation block with suitable compressive strength used in building was prepared by white carbon black(precipitated silica).White carbon black was used as a matrix,the high-belite cement clinker as a binder, carbon fiber and three-dimensional glass fiber structure as a framework,set retarding superplasticizer and expanding ad-mixture as multifunction admixture to reduce water consumption and improve the crack resistance,water as medium. Density,compressive strength and thermal conductivity at room temperature(25 ℃)and ambient pressure were meas-ured,respectively.Results show that the sample has density of 262 kg/m3 and compressive strength of 2.1 MPa.Also, at ambient pressure,the sample has thermal conductivity of 0.056 W·(m·K)at room temperature.%以白炭黑(即沉淀二氧化硅)为主要原材料，添加胶凝材料高贝利特水泥熟料后拌合，掺入膨胀剂提高抗裂性能，加入短切碳纤维干拌成混合粉料；在粉料中加入一定量的水及高性能减水剂制成混合料浆，将料浆浇筑入立体三维玻璃纤维网架模具中，制备出具有一定强度的新型建筑保温块体材料；常温(即25℃)常压下，分别检测块体材料样品的密度、抗压强度、热导率。结果表明，干燥后的块体样品平均密度为262 kg/m3、平均抗压强度为2.1 MPa、热导率为0.056 W/(m·K)。