Creep and shrinkage of high-performance lightweight concrete

被引：0
作者：
Lopez, M [1 ]
Kahn, LF
Kurtis, KE
机构：
[1] Catholic Univ Chile, Sch Civil Engn, Santiago, Chile
[2] Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA
来源：
ACI MATERIALS JOURNAL | 2004年 / 101卷 / 05期
关键词：
creep; high-performance concrete; high-strength concrete; lightweight concrete; modeling; prestressed concrete; shrinkage;
D O I：
暂无
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Two high-performance lightweight concrete (HPLC) mixtures with average compressive strengths of 68.5 and 75.4 MPa (9950 and 10,950 psi) were developed. Their air-dry unit weights were 1875 and 1905 kg/m(3) (117 and 119 lb/ft(3)), respectively. Twenty-six creep specimens were loaded at 16 or 24 h to 40 or 60% of their initial strength. This preliminary investigation showed that expanded slate HPLC experienced less creep, but slightly more shrinkage than normalweight high-performance concrete of similar paste content, mixture proportions, and strength. The 620-day creep coefficients of the 68.5 and 75.4 MPa (9950 and 10,950 psi) HPLC were 1.66 and 1.29, respectively. The 620-day shrinkage of the 68.5 and 75.4 MPa (9950 and 10,950 psi) HPLC were 820 and 610 muepsilon, respectively. Creep and shrinkage were compared with estimates from 12 models.
引用
收藏
页码：391 / 399
页数：9
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