Experiment on mechanical properties of steel fiber recycled aggregate concrete under triaxial compression

被引：0

作者：

Chen Y. ^{[1
,2
]}

Ji Y. ^{[1
]}

Chen Z. ^{[1
,3
]}

Ye P. ^{[1
]}

Wu H. ^{[1
]}

机构：

[1] College of Civil Engineering and Architecture, Guangxi University of Science and Technology, Liuzhou

[2] School of Civil Engineering and Transportation, South China University of Technology, Guangzhou

[3] Guangxi Key Laboratory of Disaster Prevention and Mitigation and Engineering Safety, Nanning

来源：

Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2022年 / 39卷 / 08期

关键词：

elastic modulus; peak strain; peak stress; steel fiber recycled aggregate concrete; triaxial compression;

D O I：

10.13801/j.cnki.fhclxb.20210903.006

中图分类号：

学科分类号：

摘要：

In order to study the mechanical properties of steel fiber recycled aggregate concrete (SFRAC) under triaxial compression, 168 cylinder specimens were tested by considering the parameters of the lateral confining pressure, the replacement rate of recycled coarse aggregate and the volume fraction of steel fiber. The failure pattern of the specimens was observed in the test. The stress-strain curve, peak stress, peak strain and elastic modulus were obtained. Based on the test data, the influence of different parameters on the mechanical performance was analyzed. The results show that under triaxial compression, the specimens are destroyed by oblique splitting. With the increase of confining pressure, the peak of stress-strain curve increases, while the descending section becomes slower, the peak stress, peak strain and elastic modulus of SFRAC all increase significantly. Steel fiber increases the residual strength of the specimen under uniaxial compression and makes the descending section of the stress-strain curve slow down. With the increase of the replacement rate of recycled coarse aggregate, the peak stress and elastic modulus decrease and the peak strain increases. Under triaxial compression, the steel fiber has little effect on the peak stress of SFRAC, and when the volume fraction of steel fiber is 1vol%, the improvement effect on the deformation performance of SFRAC is optimal. Finally, the formulas for calculating the peak stress, peak strain and elastic modulus of SFRAC under triaxial compression are put forward. © 2022 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.

引用

页码：4005 / 4016

页数：11

共 27 条

[1]

SALMAN R M, AHMAD K R., Effect of biomineralization technique on the strength and durability characteristics of recycled aggregate concrete[J], Construction and Building Materials, 290, (2021)

[2]

LI B, WANG Y, JIN Q, Et al., Liquefaction characteristics of recycled concrete aggregates, Soil Dynamics and Earthquake Engineering, 120, pp. 85-96, (2019)

[3]

FAN Y H, NIU H C, ZHANG X G., Study on creep test of recycled coarse aggregate concrete and influence mechanism of old mortar[J], Journal of Building Materials, 23, 3, pp. 596-602, (2020)

[4]

LIU Q, HAN F X, YU G M, Et al., Basic mechanical properties of recycled coarse aggregate self compacting concrete[J], Journal of Building Materials, 23, 5, pp. 1053-1060, (2020)

[5]

SHI C J, CAO Z J, XIE Z B., Research progress in the mechanical properties of recycled aggregate concrete, Materials Reports, 30, 23, pp. 96-103, (2016)

[6]

CHEN Y L, LIU J, WU H Q, Et al., Mechanical properties and strength index conversion of recycled aggregate concrete under direct shear, Acta Materiae Compositae Sinica, 38, 11, pp. 3962-3970, (2021)

[7]

SUN D S, LI Z Y, LIU K W, Et al., Influence of shapes and defects in recycled aggregate on drying shrinkage and mechanical properties of recycled aggregate concrete, Materials Reports, 35, 11, pp. 11027-11033, (2021)

[8]

ZHU H B, HAN B, ZHANG N., Effect of polypropylene fiber content on compressive and flexural performance of recycled concrete[J], Journal of Physics Conference Series, 1605, (2020)

[9]

HUANG M, ZHAO Y R, WANG H N, Et al., Mechanical properties test and strength prediction on basalt fiber reinforced recycled concrete[J], Advances in Civil Engineering, 2021, pp. 1-10, (2021)

[10]

GAO D Y, JING J H, ZHOU X., Reinforcing mechanism and calculation method of compressive behavior of hybrid fiber reinforced recycled brick aggregates concrete, Acta Materiae Compositae Sinica, 35, 12, pp. 3441-3449, (2018)

← 1 2 3 →