Table of Contents
ISRN Civil Engineering
Volume 2012, Article ID 103534, 7 pages
Research Article

The Effect of Accelerators and Mix Constituents on the High Early Strength Concrete Properties

Structural Engineering Division, VIT University, Vellore 632014, India

Received 24 February 2012; Accepted 15 May 2012

Academic Editor: M. Maslehuddin

Copyright © 2012 V. M. Sounthararajan and A. Sivakumar. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The present research study focused on the high early strength concrete properties that can be produced with large replacement of cement by fly ash. Also, the effects of adding fibres on the compressive strength gain and early age strength gain properties are determined. Tests were conducted on different high strength concrete specimens, where fly ash was substituted for cement up to 50%. Different types of concrete specimens were casted and tested for different fine-to-coarse aggregate ratio, metallic fibre content, cement-to-total-aggregate ratio, and accelerator dosage. The test results indicated that high early strength concrete (50.7 MPa at 7 days) was obtained for higher F/C ratio of 0.8, C/TA ratio of 0.24, and higher dosage level of steel fibre at 1.5%.