Bond behavior between recycled macro fibers and ultra-high-performance concrete matrix: Tests and property characterization

You, X. M.1; Xu, Y. B.1; Fan, Y. C.1; Zou, Q. Q.2,3; Fu, Bing1,4

2024-10-15

10.1016/j.jobe.2024.110003

JOURNAL OF BUILDING ENGINEERING   影响因子和分区

2352-7102

A green and cost-efficient ultra-high-performance concrete (UHPC) has been proposed using discrete macro fibers recycled from waste glass fiber reinforced polymer (GFRP). The tensile properties of such composites are significantly affected by the macro fiber/UHPC bond properties. However, there is very little work characterizing the bond properties of the macro fiber/UHPC interface. Furthermore. lack of study focused on the methods for macro fiber surface treatment and their effects on macro fiber/UHPC interfacial bonding. Therefore, the present study first carried out pullout tests in two series consisting of 128 pullout specimens. Series 1 aimed to characterize the bond behavior of the macro fiber/UHPC interface, while Series 2 aimed to investigate the effect of surface-modifying agents on macro fiber/UHPC interfacial bonding. The results demonstrated that the bond strength increased from 19.3 to 20.9 MPa when the embedded length of the 8 mm-wide fiber increased from 5 to 10 mm. The modification of neutral Nano SiO2 (NNS) enhanced the bond strength by up to 20.5 %, while alkaline Nano SiO2 (ANS) and silane coupling agent (SCA) showed a negative effect on bond strength. Then, the shear-lag theory was utilized for predicting the pull force-slip curves of the fibers embedded in UHPC, and then the bond parameters of the interfaces were obtained through an inverse analysis. A good agreement is exhibited with integral absolute error (IAE) from 4.5 % to 10.5 % between predicted results and test results.

Glass fiber reinforced polymer composites Ultra -high -performance concrete Recycling Macro fibers Interfacial bond

SCI ; EI

英语

其他

National Natural Science Foundation of China["52178212","51978176"]

Construction & Building Technology ; Engineering

Construction & Building Technology ; Engineering, Civil

WOS:001264361900001

ELSEVIER

20242716608966

Bond strength (materials) ; Coupling agents ; Fiber bonding ; Fiber reinforced plastics ; Glass fibers ; High performance concrete ; Recycling ; Surface treatment

Concrete:412 ; Industrial Wastes:452.3 ; Biomedical Engineering:461.1 ; Chemical Agents and Basic Industrial Chemicals:803 ; Glass:812.3 ; Materials Science:951

Web of Science

1.Jinan Univ, Sch Mech & Construct Engn, Guangzhou 510632, Peoples R China
2.Harbin Inst Technol, Sch Astronaut, Harbin 150001, Peoples R China
3.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen 518055, Peoples R China
4.Jinan Univ, MOE Key Lab Disaster Forecast & Control Engn, Guangzhou 510632, Peoples R China

You, X. M.,Xu, Y. B.,Fan, Y. C.,et al. Bond behavior between recycled macro fibers and ultra-high-performance concrete matrix: Tests and property characterization[J]. JOURNAL OF BUILDING ENGINEERING,2024,95.

You, X. M.,Xu, Y. B.,Fan, Y. C.,Zou, Q. Q.,&Fu, Bing.(2024).Bond behavior between recycled macro fibers and ultra-high-performance concrete matrix: Tests and property characterization.JOURNAL OF BUILDING ENGINEERING,95.

You, X. M.,et al."Bond behavior between recycled macro fibers and ultra-high-performance concrete matrix: Tests and property characterization".JOURNAL OF BUILDING ENGINEERING 95(2024).