Utilization of Wheat Straw for Concrete Insulation Brick

The use of waste to developing insulation building materials has become a new requirement of green building. This study aimed to investigate the feasibility of using wheat straw as fillers for making thermal insulation brick to reduce energy loss in buildings. Wheat straw, expanded perlit and asphalt were used to produce straw insulation blocks, and the mix ratio of the used materials was determined using the orthogonal method. The reasonable mixing ratio is as follows: wheat straw content (weight ratio) is 23.8%, expanded perlite content 19.8%, and asphalt content 56.4%. Straw insulation blocks were filled into hollow concrete bricks to prepare straw insulation block core-filled concrete brick (SIBCCB). The density, compressive strength and thermal conductivity of SIBCCB were measured. The results indicate that SIBCCB has lightweight, low carbon emissions, good thermal insulation performance, and compression resistance capacity, and is an ideal insulation block for load-bearing lightweight, and non-load-bearing walls.