Experimental study on flexural capacity of PVA fiber-reinforced recycled concrete slabs

被引：18

作者：

Yu, Feng ^{[1
]}

Li, Xu ^{[1
]}

Song, Jie ^{[1
]}

Fang, Yuan ^{[1
]}

Qin, Yin ^{[1
]}

Bu, Shuangshuang ^{[1
]}

机构：

[1] Anhui Univ Technol, Dept Civil Engn & Architecture, Maxiang Rd, Maanshan 243032, Anhui, Peoples R China

来源：

ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING | 2021年 / 21卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Recycled concrete; Slab; PVA fiber; Failure mode; Flexural capacity; MECHANICAL-PROPERTIES; AGGREGATE CONCRETE; CEMENTITIOUS COMPOSITE; SHEAR-STRENGTH; PERFORMANCE; BEAMS; BEHAVIOR; STEEL; DURABILITY;

D O I：

10.1007/s43452-021-00314-3

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The flexural tests were conducted on 21 polyvinyl alcohol (PVA) fiber-reinforced recycled concrete slabs to investigate the influences of the reinforcement ratio, the PVA fiber content, the replacement ratio of recycled coarse aggregate (RCA) and the span-thickness ratio on the mechanical behaviors. The failure mode of the PVA fiber-reinforced recycled concrete slabs was the yielding of the longitudinal tensile reinforcement, slight crushing of concrete in the compression zone, and pulling out or breaking of PVA fiber at cracking position. The ultimate moment, cracking moment, moment corresponding to 0.2 mm-crack width and yield moment decreased as the replacement ratio of RCA or the span-thickness ratio increased while they increased as the reinforcement ratio or the PVA fiber content increased. Considering the impact of the PVA fiber content and the replacement ratio of RCA, the calculation formulas for conveniently predicting the flexural capacities of the PVA fiber-reinforced recycled concrete slabs were proposed. The formula prediction results were in good agreement with the test data.

引用

页数：23

共 59 条

[1]

ACI544.4R-18, 2018, ACI5444R18, P544

[2] Mechanical properties of the concrete containing recycled fibers and aggregates [J].