GIẢI PHÁP TÍNH BỀN NHIỆT CỦA BÊ TÔNG TRO TRẤU VỀ AN TOÀN PHÒNG CHÁY CHO CÁC CÔNG TRÌNH XÂY DỰNG

Abstract

This article presents some experiments on grade 300 rice husk ash concrete specimens, researches on the effect of husk ash on the compressive strength, thermal conductivity ratio and fire resistance of concrete in the laboratory of the Institute of Science and Technology of Concrete and Construction structures in fire conditions. Research results show that ash rice husk ash concrete can improve the properties of strength when exposed to high temperatures. Thermal conductivity is lower than the non-hush ash concrete specimens, thus improving the thermal insulation properties when exposed to excessive heat dure a fire incident. low thermal conductivity ratio decreases the thermal transmission from the surface exposing to fire to the opposite side, reducing the temperature difference between the concrete blocks and the fire exposure time is extended. This trend is effective in restricting the thermal pre-stress within the concrete block and thereby reducing the cracking in large concrete blocks, it means prolonging the safe time when fire incident occurs. The application of thermal insulation materials made of ash-husk ash concrete is essential to improve the quality of the construction work, minimizing the risk in the event of fire.