INFLUENCE OF FLY ASH ON PERFORMANCE OF THERMAL INSULATING MORTAR BLENDED WITH VITRIFIED MICROSPHERE

Using of lightweight aggregate-vitrified microsphere,we developed a novel type of vitrified microsphere insulation mortar. the influence of fly ash on fluidity,wet apparent density,dry apparent density,compressive strength,water absorption rate and thermal conductivity of the thermal insulating mortar was investigated,and compared with that of normal mortar. The results show that: thermal insulating mortar's fluidity and thermal conductivity first increased and then decreased. However wet apparent density, dry apparent density,compressive strength and water absorption of volume were all declined first and then rised,and under this experimental condition,for thermal insulating mortar blended with vitrified microsphere,the properties were better than normal mortar for incorporating with about 10% fly ash.