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

Jinxing Wang1,2,3, Yingjie Yang1,2,3, Xiaolin Yang1,2,3, Huazhe Jiao1,2,3,4,*, Qi Wang1,2,3, Liuhua Yang1,2,3, Jianxin Yu1,2,3, Fengbin Chen1,2,3

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

* Corresponding Author: Huazhe Jiao. Email: email

Journal of Renewable Materials 2023, 11(8), 3351-3370. https://doi.org/10.32604/jrm.2023.027512

Abstract

In order to improve the comprehensive utilization rate of high fines sand (HFS) produced by the mine, full solid waste shotcrete (HFS-BFRS) was prepared with HFS as fine aggregate in cooperation with basalt fiber (BF). The strength growth characteristics of HFS-BFRS were analyzed. And the fitting 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 and flexural 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), basalt fiber 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 and flexural strength is C/H > FDN > BF Vol, and splitting tensile strength is BF Vol > FDN > C/H. Finally, the fitting ratio of HFS-BFRS was optimized by the factor index method, and the rationality was verified by the field test. For the fluidity 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.

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Wang, J., Yang, Y., Yang, X., Jiao, H., Wang, Q. et al. (2023). Study on Mechanical Properties of High Fine Silty Basalt Fiber Shotcrete Based on Orthogonal Design. Journal of Renewable Materials, 11(8), 3351–3370.



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