Analysis of compressive strength of concrete using different Sulphonated Naphthalene Polymer based admixtures

Abstract

The use of super plasticizers has growning popularity for the improvement of properties of fresh and hardened concrete. These admixtures are frequently used in ready mix concrete, pre-stressed concrete, pilling, pumped Concrete, hot weather concreting, culvert, dams, bridge, superstructures and pre-cast elements. In this study SulfonatedNaphthalene Polymer base conforming to ASTM C-494 has been used. The ratio of 1:1.5:3 was used for mix proportioning of concrete constituents by weight. The water cement ratios were maintained as 0.30, 0.35, 0.40, 0.45 and 0.50 to study the effect of these admixtures on compressive strength of concrete. Fine aggregate and coarse aggregate volumes are kept unchanged throughout the study. The results have shown substantial improvement in the properties of concrete after use of the admixtures.And the compressive strength of concrete has been significantly higher at low water cement ratio.