RESEARCH ARTICLE


Effects of Aggregate Grading and Admixture/Filler on Self-Consolidating Concrete



Arka Bhattacharya, Indrajit Ray*, Julio F. Davalos
Department of Civil and Environmental Engineering, West Virginia University, Morgantown, 26506- 6103, USA.


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© 2008 Bhattacharya et al.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the Department of Civil and Environmental Engineering, West Virginia University, Morgantown, 26506-6103, USA.Tel: (304)293-3031; Fax: (304)293-7109; E-mail: indrajit.ray@mail.wvu.edu


Abstract

Self-consolidating concrete (SCC) is becoming a popular choice in concrete industry due to ease of placement in congested reinforcements, reduced labor and equipment, nonsegregating character, and smooth surface. Due to its sensitivity to aggregate grading, proportions, admixtures, and filler contents and being a relatively new material, more information are required on the effects of aggregate grading, mineral admixture types, and fillers on fresh and strength properties.

In this paper a total of 10 SCC were investigated to compare the effects of aggregate size and distribution, mineral admixture, and filler on fresh properties through slump-flow, J-ring, L-box, column segregation, and compressive strength tests. Results show that combined aggregate distribution is critical for selecting proper SCC mixtures. Water/powder ratio and paste volume has more effects on SCC than water-cementitious material ratio. In general SCC properties can be greatly influenced by admixture types and dosage, and filler.

Keywords: Admixtures, Aggregate grading, Fillers.