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2014, Volume 8, Issue 1

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Frontiers of Structural and Civil Engineering >> 2014, Volume 8, Issue 1 doi: 10.1007/s11709-014-0243-0

A comparative study of the mechanical properties, fracture behavior, creep, and shrinkage of chemically based self-consolidating concrete

1. Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Missouri MO 65409, USA; 2. U S Army Corps of Engineers, 1222 Spruce St., St. Louis, Missouri MO 63103, USA; 3. School of Civil Engineering and Environmental Science, University of Oklahoma, Norman OK 73019-1024, USA

Available online: 2014-03-05
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Abstract

This study presents the results of an experimental investigation that compares the mechanical properties, fracture behavior, creep, and shrinkage of a chemically-based self-consolidating concrete (SCC) mix with that of a corresponding conventional concrete (CC) mix. The CC and SCC mix designs followed conventional proportioning in terms of aggregate type and content, cement content, air content, water-cementitiuos materials ( / ) ratio, and workability. Then, using only chemical admixtures, the authors converted the CC mix to an SCC mix with all of the necessary passing, filling, flowability, and stability requirements typically found in SCC. The high fluidity was achieved with a polycarboxylate-based high-range water-reducing admixture, while the enhanced stability was accomplished with an organic, polymer-based viscosity-modifying admixture. The comparison indicated that the SCC and CC mixes had virtually identical tensile splitting strengths, flexural strengths, creep, and shrinkage. However, the SCC mix showed higher compressive strengths and fracture energies than the corresponding CC mix.

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