Effect of polypropylene plastic fibers length on cracking resistance of high performance concrete at early age

被引：105

作者：

Shen, Dejian ^{[1
,2
,3
]}

Liu, Xingzuo ^{[1
,2
,3
]}

Zeng, Xuan ^{[1
,2
,3
]}

Zhao, Xiaoguang ^{[1
,2
,3
]}

Jiang, Guoqing ^{[2
,3
,4
]}

机构：

[1] Hohai Univ, Coll Civil & Transportat Engn, 1 Xikang Rd, Nanjing 210098, Peoples R China

[2] Jiangsu Engn Res Ctr Crack Control Concrete, 1 Xikang Rd, Nanjing 210098, Peoples R China

[3] Nanjing Engn Res Ctr Prefabricated Construct, 1 Xikang Rd, Nanjing 210098, Peoples R China

[4] Nanjing Construct Grp CO Ltd, 200 Ruanjian Ave, Nanjing 210012, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 244卷

基金：

中国国家自然科学基金;

关键词：

High performance concrete; Polypropylene plastic fibers; Early age; Tensile creep; Cracking resistance; HIGH-STRENGTH CONCRETE; TENSILE CREEP-BEHAVIOR; BLAST-FURNACE SLAG; AUTOGENOUS SHRINKAGE; LIGHTWEIGHT AGGREGATE; CURING TEMPERATURE; MECHANICAL-PROPERTIES; RESTRAINING STRESSES; BARCHIP FIBER; STEEL FIBER;

D O I：

10.1016/j.conbuildmat.2019.117874

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Fibers reinforcement which is an effective mean to improve the cracking resistance of high performance concrete (HPC) is widely applied in practice. The early-age cracking resistance is improved by the addition of polypropylene plastic fibers, which is also affected by the length of fibers. Although investigations on the effect of content of polypropylene plastic fibers on the properties of HPC were carried out, investigations on the effect of length of polypropylene plastic fibers on the cracking resistance of HPC remain lacking. In present study, the effect of length of polypropylene plastic fibers on the early-age properties of HPC was investigated by Temperature Stress Test Machine. The test results and corresponding analysis indicated that: (1) the increasing length of polypropylene plastic fibers reduced the temperature drop at cracking time of HPC; (2) the increasing length of polypropylene plastic fibers reduced the absolute value of autogenous shrinkage of HPC; (3) the increasing length of polypropylene plastic fibers reduced the ratio of cracking stress to axial tensile strength and stress reserve of HPC; (4) the increasing length of polypropylene plastic fibers reduced the specific tensile creep of HPC; (5) the increasing length of polypropylene plastic fibers reduced the cracking resistance of HPC. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：10