【2017-0669】稻壳纤维粒径和掺入质量分数对水泥复合材料性能的影响

《复合材料学报》优先在线发表论文。

摘  要：以稻壳纤维（Rice husk fiber, RHF）为增强材料，以水泥为基体，制备了RHF/水泥基复合材料。研究了粒径对RHF在水泥基体中的分散性能的影响；并以RHF粒径、掺入质量分数为考察因素，采用响应曲面法，以RHF/水泥基复合材料的密度、抗折强度、含水率、吸水率和导热系数为响应值，建立数学模型，对RHF/水泥基复合材料的成型工艺进行优化设计。研究结果表明：RHF的粒径越小，在水泥基体中分散性能越好，150μmRHF分散系数达到最大值，为0.981；响应曲面模型分析表明RHF的粒径为150μm，掺入质量分数为水泥质量3%时，RHF/水泥基复合材料的性能达到最优，此时RHF/水泥基复合材料的密度为1559.26kg/m³，抗折强度为9.38MPa、含水率为7.05%、吸水率为16.71%，导热系数为0.50W/m.K，达到了建筑行业标准JC/T 411-2007的要求。

关键词：稻壳纤维；水泥基复合材料；粒径；掺入质量分数；响应曲面模型

Abstract: RHF(Rice husk fiber,RHF) were added into cement as reinforced materials to prepare RHF/cement composites.The effect of particle size on the dispersion properties of RHF in cement matrix was studied. And the particle size and mass fraction of RHF as factors, the density, flexural strength, water content, water absorption and thermal conductivity of RHF/cement composite as response value, the mathematical model was established used the response surface method, the molding process of RHF / cement composites was optimized. The result show that the smaller particle size of RHF,the better dispersion of RHF in cement, the dispersion coefficient reaches the maximum value 0.981 when particle is 150 um.The response surface model analysis show that the RHF/cement composite achieve optimal when particle size is 150 um and mass fraction is 3%, under this process, the density, flexural strength, water content, water absorption and thermal conductivity of RHF/cement reaches 1559kg/m³, 9.38MPa, 7.05%, 16.71%, 0.50w/(m.k), respectively, they are all up to JC/T 411-2007.

Keywords: RHF; Cement composites; Particle size; Mass fraction; Response surface model

作者：王春红等，天津工业大学 纺织学院，天津

通讯作者：王春红，天津工业大学 纺织学院，天津

全文详见中国知网学术期刊优先数字出版。