Correlations among various self-consolidating concrete workability responses

被引:0
|
作者
Long, Wu-Jian [1 ]
Khayat, Kamal Henri [2 ]
Xing, Feng [1 ]
机构
[1] Shenzhen Durability Center for Civil Engineering, Shenzhen University, Shenzhen 518060, China
[2] Faculty of Civil Engineering, Université de Sherbrooke, Sherbrooke J1K 2R1, Canada
来源
Open Civil Engineering Journal | 2012年 / 6卷 / 01期
关键词
D O I
10.2174/1874149501206010038
中图分类号
学科分类号
摘要
Self-consolidating concrete (SCC) mixtures designated for precast, prestressed applications should be highly workable to flow easily through restricted spacing and completely encapsulate reinforcements without any mechanical vibration. Key workability characteristics of SCC can be described in terms of filling ability, passing ability, and resistance to segregation. These properties are typically characterized by data that relate to specific testing methods. In general, these methods include the components required for evaluating simultaneously filling ability, passing ability, and resistance to segregation, since these properties are rather interrelated. In this investigation, 33 SCC mixtures made with various mixture proportioning parameters, including maximum size and type of aggregate, type and content of binder, and w/cm were evaluated. The mixtures were prepared using crushed aggregate and gravel of three different nominal sizes, w/cm of 0.33 and 0.38, and three binder compositions: Type MS cement, Type HE cement with 30% of slag replacement, and Type HE cement with 20% of Class F fly ash. Comparisons and correlations among various test results used in evaluating the workability responses obtained for these mixtures are established. This is done to highlight advantages and limitations of the various test methods that can be used to assess workability of SCC designated for prestressed applications. Appropriate combinations of test methods that can be used to assess workability of SCC at the precast plant are recommended, and ranges of acceptance of the various test methods are established. © Long et al.
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页码:38 / 47
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