JIN Man-tong, SUN Ye, CHEN Lin-wei
(College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310014, China)

Abstract：To compensate for the lack of compressive strength, fire resistance and thermal insulation in traditional straw building materials, this paper describes the synthesis of straw-reinforced geopolymer composites and the characteristics of their thermal insulation properties and high temperature performance. The results show that straw-geopolymer has good insulation properties. The thermal conductivity decreases from 0.0981 W/m·K to 0.0692 W/m·K with increasing straw content (1% ~ 6%). The compressive strength is 32.78 MPa at 4% straw content. Results of thermal analysis show that the geopolymer composites can prevent degradation of straw at elevated temperatures below 250 ℃. The remaining compressive strength is 35.94 MPa after calcination at 600 ℃ for 120 min. When calcined at < 800 ℃, the composites show stable mineral structures and high-temperature performance.

Keywords：geopolymer; straw; composites; thermal stability

Email: jmtking@zjut.edu.cn

ACTA MINERALOGICA SINICA Vol. 35, No. 2, 2015, Page 185-190