ABSTRACT
Geopolymers based on fly ash are an emerging alternative to ordinary Portland cement, with a low impact on the environment and a potential to increase the sustainability of the concrete-based construction. Reported here is the design and investigation of new wood fiber reinforced geopolymer composites (WFRGC) based on fly ash and wood fiber (5–35 wt%). These WFRGC showed reduced mechanical properties with rising wood fiber addition as calculated by compressive strength with the cylindrical test (7.83–59.82 MPa); compressive strength at cubic test (6.95–50.23 MPa); force load at upper yield (0.70–5.02 KN); flexural strength (1.71–11.05 MPa); compressive modulus at cubic test (0.13–054 GPa); and flexural modulus (3.91–1293.61 MPa). The adding of wood fiber showed decreases of the density WFRGC (1.58–1.87 g/cm3) and decreases the thermal conductivity of WFRGC. The addition 20 wt% wood fiber could be the limit for acceptable mechanical properties. WFRGC with 20–35 wt% wood fibers may be a promising green material for building.
摘要
以粉煤灰为基础的地质聚合物是一种新兴的普通硅酸盐水泥替代品,对环境的影响较小,有可能提高混凝土建筑的可持续性. 本文报道了以粉煤灰和木纤维(5~35wt%)为基料的新型木纤维增强地质聚合物复合材料(WFRGC)的设计与研究. 这些WFRGC的力学性能随着木纤维添加量的增加而降低,用柱状抗压强度计算(7.83-59.82MPa); 立方体抗压强度(6.95-50.23MPa); 上屈服时的力载荷(0.70-5.02KN); 抗折强度(1.71-11.05MPa)立方体试验的压缩模量(0.13-054GPa)和弯曲模量(3.91-1293.61MPa). 木纤维的加入降低了WFRGC的密度(1.58-1.87g/cm3),降低了WFRGC的导热系数. 添加20%的木纤维可作为可接受机械性能的极限. 含20-35%木纤维的WFRGC是一种很有前途的绿色建筑材料.
Declaration of competing interest
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.