Effect of straw carbonization on properties of cement-based straw fiber composites

2019 3rd International Workshop on Renewable Energy and Development

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;    Hydration reaction;    Initial setting time;    Interfacial bonding;    Material analysis;    Ordinary Portland cement;    Sulphoaluminate cement;    Surface layers;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/2/022024/pdf
DOI  :  10.1088/1755-1315/267/2/022024

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The raw materials of straw fibers were treated by different methods of nitrogen filling and carbonization at different temperatures. The cementitious materials consisted of ordinary Portland cement with strength grade 52.5 and sulphoaluminate cement with a ratio of 3:7. The surface morphology and material analysis of the fibers were carried out by means of SEM and EDS. The SiO2 content in the surface layer of carbonized straw fibers was 86.69% higher than that of common straw fibers, and the interfacial bonding of the composites was more compact because of the hydration reaction. The initial setting time of composites with carbonized straw fibers is shorter than that of ordinary straw fibers, the flexural strength is slightly reduced by 6.3%, and the compressive strength is significantly increased by 21.93%.