关键词: 粉煤灰;矿粉;抗压强度;导热系数;吸水率

Abstract: The compressive strength, thermal conductivity and water absorption of 400 kg/m3foam concrete with single fly ash,slag powder and composite fly ash and slag powder were studied.When the content of fly ash is 10%, the compressive strength can be increased.When the content is 30%, the thermal conductivity and water absorption will be reduced remarkably; When the amount of mineral powder is 20%, the compressive strength and water absorption can be increased, but the thermal conductivity increases with the increase of the amount of admixture; When fly ash and slag powder are used instead of 50%cement, the ratio is 2:3, it can increase the compressive strength and reduce the water absorption, and the thermal conductivity increases with the increase of mixing ratio.The foam concrete mixed with mineral admixture,can not only reduce the hydration heat,but also can reduce the cracking degree of foam concrete, the research for the future of foam concrete in foundation insulation, roof insulation,heating cushion provides application value.

Key words: fly ash;mineral powder;compressive strength;thermal conductivity;water absorption rate