Effects of Hauling Time on Air-Entrained Self-Consolidating Concrete

Document Type

Article

Publication Date

5-2010

Publication Title

ACI Materials Journal

Volume

107

Issue

3

First page number:

275

Last page number:

281

Abstract

Self-consolidating concrete (SCC) is a highly flowable concrete that is characteristically sensitive to mixing and hauling variables such as transportation time. In real-world applications, lengthy hauling times are often necessary for transportation to the job site and can result in deviations in the fresh properties of SCC. In this investigation, air-entrained SCCs were developed at a constant water-to-cementitious material ratio (w/cm) of 0.40 and air content of 6% for three distinct slump flows of 559, 635, and 711 mm (22, 25, and 28 in.). Test results revealed that the slump flow losses up to 39% were recorded after 90 minutes of hauling time. The air content increased with hauling time, ranging from 2.6% to 4.8%. The air void characteristics improved with hauling time, with an average increase in specific surface of 9.5 mm-1 (241.3 in.-1) and an average decrease in spacing factor of 64 �m (0.0025 in.).

Keywords

Concrete; Self-consolidating concrete

Disciplines

Civil and Environmental Engineering | Civil Engineering | Construction Engineering and Management | Structural Engineering

Language

English

Permissions

Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.

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