玄武岩纤维增强泡沫混凝土响应面多目标优化  

Response Surface Based Multi-objective Optimization of Basalt Fiber Reinforced Foamed Concrete

作　　者：王静文 王伟[2] WANG Jingwen;WANG Wei(Department of Civil Engineering,Ordos Institute of Technology,Ordos 017000;Department of Electrical Engineering,Southeast University,Nanjing 210096)

机构地区：[1]鄂尔多斯应用技术学院土木工程系,鄂尔多斯017000 [2]东南大学电气工程学院,南京210096

出　　处：《材料导报》2019年第24期4092-4097,共6页Materials Reports

基　　金：内蒙古自治区教育厅高等学校科学研究项目(NJZY18251)~~

摘　　要：为改善传统泡沫混凝土的力学性能,制备了以玄武岩纤维为微加筋材料的玄武岩纤维增强泡沫混凝土(BFFC)。采用响应面法设计试验并建立回归模型,研究泡沫和纤维掺量对BFFC表观密度、抗压强度和抗压韧性指数的影响;同时结合渴求函数对BFFC综合性能实现多目标优化,并对纤维作用机理进行了SEM分析。结果表明,制备单位体积BFFC成品的最优泡沫掺量与纤维掺量分别为0.617875m3与2.38466kg,该配比可以制备出表观密度仅为641.06kg/m3而抗压强度高达13.60MPa、抗压韧性指数高达0.887的BFFC。SEM分析表明,适量玄武岩纤维通过桥联作用下的多裂缝稳定扩展实现了对泡沫混凝土的增强及增韧。In order to improve the mechanical properties of traditional foamed concrete,basalt fiber reinforced foamed concrete (BFFC) was prepared. The response surface methodology was used to design the test and establish the regression model to analyze the influence of the content of foam and fiber on apparent density,compressive strength and compressive toughness of BFFC. The desirability function was used to do the multi-objective optimization,and the fiber mechanism was analyzed by SEM. The results show that the optimal foam and fiber content for BFFC products per unit volume are 0.617 875 m 3 and 2.384 66 kg respectively,which can achieve BFFC with apparent density of 641.06 kg/m 3,compressive strength up to 13.60 MPa,and compressive toughness index up to 0.887. The microscopic analysis result shows that basalt fiber of appropriate amount can strengthen and toughen the foamed concrete through the stable propagation of multiple cracks under the bridging action.

关 键 词：玄武岩纤维 泡沫混凝土 抗压性能 响应面法(RSM) 多目标优化 

分 类 号：TU528.3[建筑科学—建筑技术科学]