Effect of Super absorbent polymer on workability, strength and durability of Self consolidating concrete

Abstract

This study presents the effect of super absorbent polymer (SAP) as internal curing agent on workability, durability and compressive strength of self-consolidating concrete (SCC). In order to estimate the internal curing efficiency of SAP in different curing conditions and curing ages, compressive strength and electrical resistivity tests have been performed. Homogenous and denser microstructure was formed by gradual release of water from SAP into pores created by SAP. Further pozzolanic reaction of fly ash has enhanced the strength and durability properties. High desorption rate of water from SAP in air curing condition resulted in an increased electrical resistivity and compressive strength. Compressive strength of internal cured SCC mixtures increased to 15-25% at 7 days and 10-19% at 28 days. Electrical resistivity values were increased 11-30% in water curing condition and 16-53% in air curing condition. The costs for 0.35w/b and 0.40 w/b at optimum internal cured SCC mixtures compared to control SCC mixtures were reduced to 9.39 and 9.70%, respectively.

Impact of superabsorbent polymer on self-compacting concrete's workability, strength, carbonation and freezing-thawing

“…Hence SAP won't affect the concrete properties directly because it absorbs and desorb the water based on humidity conditions. Based on Bentz formula dosage of SAP calculated in the previous work (22). Theoretically, the amount of SAP required to achieve full hydration for 533.33 kg/m 3 cement is 0.219 kg/m 3 .…”