Effect of Diatomite on Thermal Insulation Properties of Straw Fiber Cement-based Composites

2019 5th International Conference on Energy Materials and Environment Engineering

能源学;生态环境科学

Xiao, Li-Guang^1 ; Liu, Xi-Xu^1

School of Materials Science and Engineering, Jilin Jianzhu University, Changchun

130118, China^1

关键词: Cementitious materials;    Crystallization effects;    Diffraction peaks;    Insulation performance;    Ordinary Portland cement;    Straw fibers;    Sulphoaluminate cement;    Thermal insulation properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/295/3/032047/pdf
DOI  :  10.1088/1755-1315/295/3/032047

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

This paper mainly studies the effect of Diatomite Content on the thermal insulation performance of straw fiber cement-based composites. The test shows that 30% sulphoaluminate cement is replaced by ordinary Portland cement. XRD test showed that the diffraction peaks of Ca (OH)2 and Ettringite were stronger than those of ordinary Portland cement, and the crystallization effect was better. The compressive strength and flexural strength increased by 7.6% and 20% respectively. With the increase of diatomite content, the dry density and thermal conductivity of the composite decreased. When diatomite content was 25% of the total cementitious material, the dry density of the composite was 1068.37 kg/m3, and the thermal conductivity could reach 0.1163 W/(m.K). The thermal insulation performance of the composite could be significantly improved by adding diatomite.