Study on Mechanical Properties of High Fine Silty Basalt Fiber Shotcrete Based on Orthogonal Design  

作　　者：Jinxing Wang Yingjie Yang Xiaolin Yang Huazhe Jiao Qi Wang Liuhua Yang Jianxin Yu Fengbin Chen 

机构地区：[1]State Collaborative Innovation Center of Coal Work Safety and Clean-Efficiency Utilization,School of Civil Engineering,Henan Polytechnic University,Jiaozuo,454003,China [2]Provincial Key Laboratory of Underground Engineering and Disaster Prevention and Control,School of Civil Engineering,Henan Polytechnic University,Jiaozuo,454003,China [3]School of Civil Engineering,Henan Polytechnic University,Jiaozuo,454003,China [4]Key Laboratory of Mine Ecological Effects and Systematic Restoration,Ministry of Natural Resources,Beijing,100081,China

出　　处：《Journal of Renewable Materials》2023年第8期3351-3370,共20页可再生材料杂志（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(51834001,52104129);a project supported by the China Postdoctoral Science Foundation(2020M672226,2022T150195);Key Laboratory of Mine Ecological Effects and Systematic Restoration,Ministry of Natural Resources,Open Fund(MEER-2022-09).

摘　　要：In order to improve the comprehensive utilization rate of highfines sand(HFS)produced by the mine,full solid waste shotcrete(HFS-BFRS)was prepared with HFS asfine aggregate in cooperation with basaltfiber(BF).The strength growth characteristics of HFS-BFRS were analyzed.And thefitting equation of compressive strength growth characteristics of HFS-BFRS under the synergistic effect of multiple factors was given.And based on the orthogonal experimental method,the effects on the compressive strength,splitting tensile strength andflex-ural strength of HFS-BFRS under the action of different levels of influencing factors were investigated.The effect of three factors on the mechanical properties of HFS-BFRS,3,and 28 d,respectively,was revealed by choosing the colloidal sand ratio(C/H),basaltfiber volume fraction(BF Vol)and naphthalene high-efficiency water reducing agent(FDN)as the design variables,combined with indoor tests and theoretical analysis.The results show that the sensitivity of the three factors on compressive strength andflexural strength is C/H>FDN>BF Vol,and split-ting tensile strength is BF Vol>FDN>C/H.Finally,thefitting ratio of HFS-BFRS was optimized by the factor index method,and the rationality was verified by thefield test.For thefluidity of HFS-BFRS,the slump can be improved by 139%under the action of 1.2%FDN,which guarantees the pump-ability of HFS-BFRS.

关 键 词：Solid wastes recycling high-fine silt basaltfiber total solid waste shotcrete orthogonal design 

分 类 号：TU528[建筑科学—建筑技术科学]