Experimental Study on the Performance of Graded Glass Fiber Reinforced Concrete (G-GRC) Based on Engineering Application.

Qingbiao Wang,Hongxu Song,Yue Li,Shumei Lou,Fuqiang Wang,Zhongjing Hu,Zhenyue Shi

doi:10.3390/ma14051149

Qingbiao Wang, Hongxu Song + Show 5 more

Open Access

https://doi.org/10.3390/ma14051149

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Journal: Materials	Publication Date: Feb 28, 2021
Citations: 11	License type: CC BY 4.0

Affiliation: Shandong University of Science and Technology

Abstract

An important way to improve concrete performance is the use of alkali-resistant glass fibers (ARGFs) as reinforcement. This paper is based on the problems of the cracking of the partition wall and lining seepage in Laoshan Tunnel, Qingdao, China. Two types of ARGFs were selected as reinforcement materials for the partition wall and lining concrete: high dispersion (HD) and high performance (HP); and the compressive strength (CS), tensile strength (TS), flexural strength (FS), and impervious performance (IP) of concrete with different gradations of the two types of fibers were investigated. The results show that although the CS of graded glass fiber reinforced concrete (G-GRC) is slightly decreased, the TS, FS, and IP of G-GRC are significantly improved. When the densities of the ARGFs of HD and HP are 0.6 and 5 kg/m3, respectively, G-GRC performs best; additionally, compared with ordinary concrete, the TS, FS, and IP of G-GRC are increased by 15.86%, 14.90%, and 31.58%, respectively. Meanwhile, the tension–compression ratio is increased by 22.29%, and the mechanical properties of concrete are remarkably enhanced. The research results were successfully applied to the construction of the Laoshan tunnel, and good engineering results were obtained.

Highlights

Good compressive strength (CS), tensile strength (TS), flexural strength (FS), and impervious performance (IP) are the inevitable requirements of engineering construction, and fiber reinforced concrete is one of the ways to improve these various factors of concrete under the premise of not improving the cement mark, which can reduce the construction cost to a certain extent
Based on the above test method, the results of the compressive, splitting tensile, flexural, and impervious tests of each experimental group were plotted as visual diagrams for data analysis and analyzed as follows
For TS and FS, the early strength ratios (ESRs) increased while the TS and FS of graded glass fiber reinforced concrete (G-glass fiber reinforced (GRC)) at all ages increased

Summary

Introduction

Good compressive strength (CS), tensile strength (TS), flexural strength (FS), and impervious performance (IP) are the inevitable requirements of engineering construction, and fiber reinforced concrete is one of the ways to improve these various factors of concrete under the premise of not improving the cement mark, which can reduce the construction cost to a certain extent. The partition wall is long, large, and thin; cracks can form in the partition wall during the construction process. To solve this problem and control costs as much as possible, the team provided a fiber reinforced concrete solution; the application was extended to part of the tunnel lining construction. Materials 2021, 14, 1149 partition wall during the construction process. To solve this problem and control costs as of 18 much as possible, the team provided a fiber reinforced concrete solution; the application was extended to part of the tunnel lining construction

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