粉煤灰类保温材料的导热系数表示墙体材料保温隔热性能的主要指标是导热系数，对其进行测试需要专用的设备技术，目前国内许多试验室不具备这样的条件。材料导热系数与其容重有关：容重越大，导热系数越高；容重越小．导热系数越低。笔者收集了《粉煤灰综合利用》等书刊发... The thermal conductivity coefficient of fly ash thermal insulation materials indicates that the main index of thermal insulation performance of wall materials is thermal conductivity, and special equipment technology is required to test them. At present, many domestic laboratories do not have such conditions. The thermal conductivity of a material is related to its bulk density: the larger the bulk density, the higher the thermal conductivity; the smaller the bulk density. The lower the thermal conductivity. The author has collected the “comprehensive use of fly ash” and other publications...