Influences of reinforcement on differential drying shrinkage of concrete

被引:16
作者
Gao Xiaojian [1 ]
Qu Guangbin [2 ]
Zhang Ailian [3 ]
机构
[1] Harbin Inst Technol, Sch Civil Engn, Harbin 150006, Peoples R China
[2] Harbin Inst Technol, Sch Architecture, Harbin 150006, Peoples R China
[3] Sichuan Coll Architectural Technol, Dept Civil Engn, Deyang 618000, Peoples R China
基金
中国国家自然科学基金;
关键词
concrete; reinforcement; non-uniform drying; shrinkage strain distribution; internal restraint; EARLY-AGE CRACKING; AUTOGENOUS SHRINKAGE; MICROCRACKING;
D O I
10.1007/s11595-012-0508-1
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Shrinkage strain of concrete specimen with different reinforcement configuration was measured at various depths from the exposed surface by using several pairs of displacement sensors. Only one surface of the concrete specimen was exposed to dry condition during the experiment. The results show that differential shrinkage strain occurs in both plain and steel reinforced concrete specimens according to depths from the exposed surface. A higher reinforcement ratio results in a greater restraint against shrinkage of concrete nearby reinforcement rebar and a worse differential shrinkage strain distribution in the concrete specimen. The restraint against shrinkage of concrete becomes lower with the increasing distance from reinforcement rebar. Under the same reinforcement arrangement, a higher free shrinkage of concrete leads to a stronger restraint against shrinkage and a higher shrinkage stress formation in local concrete. The relationship between shrinkage strain and reduction of relative humidity in reinforced concrete structure is far different from that in plain concrete.
引用
收藏
页码:576 / 580
页数:5
相关论文
共 13 条
[1]   Permeability of cracked concrete [J].
Aldea, CM ;
Shah, SP ;
Karr, A .
MATERIALS AND STRUCTURES, 1999, 32 (219) :370-376
[2]   Relative humidity in the interior of concrete exposed to natural and artificial weathering [J].
Andrade, C ;
Sarría, J ;
Alonso, C .
CEMENT AND CONCRETE RESEARCH, 1999, 29 (08) :1249-1259
[3]  
BLOOM R, 1995, ACI MATER J, V92, P211
[4]  
Gao Xiaojian, 2009, Journal of the Chinese Ceramic Society, V37, P87
[5]  
He Z, 2004, ACI MATER J, V101, P50
[6]  
Jensen AD, 1996, MATER STRUCT, V29, P3
[7]   Prediction of differential drying shrinkage in concrete [J].
Kim, JK ;
Lee, CS .
CEMENT AND CONCRETE RESEARCH, 1998, 28 (07) :985-994
[8]   Estimating residual stress in the restrained ring test under circumferential drying [J].
Moon, Jac Heum ;
Weiss, Jason .
CEMENT & CONCRETE COMPOSITES, 2006, 28 (05) :486-496
[9]   Eight-year exploration of shrinkage in high-performance concrete [J].
Persson, B .
CEMENT AND CONCRETE RESEARCH, 2002, 32 (08) :1229-1237
[10]  
SAMAHA HR, 1992, ACI MATER J, V89, P416