A very early strength concrete for highway construction

被引：0
|
作者：
Punurai, Sun
Punurai, Wonsiri
Hsu, Cheng-Tzu Thomas [1 ]
机构：
[1] New Jersey Inst Technol, Dept Civil & Environm Engn, Newark, NJ 07102 USA
[2] Mahidol Univ, Dept Civil Engn, Nakhon Pathom 73170, Thailand
[3] New Jersey Inst Technol, Dept Civil & Environm Engn, High Performance Cocrete Lab, Newark, NJ 07102 USA
来源：
JOURNAL OF TESTING AND EVALUATION | 2007年 / 35卷 / 06期
关键词：
very early strength concrete; maturity method; initial mix temperature; shrinkage cracking;
D O I：
暂无
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The purpose of this research study was to develop an improved very early strength (VES) concrete mix for highway construction. More than 50 concrete mixes were evaluated for strength, shrinkage, and curing rate (maturity), eventually leading to the development of an optimized VES concrete mix with improved performance characteristics. The new mix, which is detailed in the paper, can gain strength more reliably than the former standard New Jersey Department of Transportation (NJDOT) VES mix, reaching a flexural strength of 350 psi (2.4 MPa) in less than 6.5 h. The improved mix also exhibited 79 to 93 % less shrinkage. The study found that maintaining an initial mix temperature of 28 degrees C (82 degrees F) is crucial to attain target strengths.
引用
收藏
页码：609 / 617
页数：9
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