ISSN: 1813-0410

Author : M. Hadi, Alaa

The Effect of Sulfates in Groundwater on Some Mechanical Properties of Self-Compacting Concrete

Ghalib M. Habeeb; Alaa M. Hadi

journal of kerbala university, 2010, Volume 6, Issue 3, Pages 72-86

The main aim of this research is to evaluate the performance of self-compacting concrete under severe saline conditions contain sulfates and chlorides at concentrations similar to those existing in soil and groundwater of the southern parts of Iraq. In this work, four basic categories of self-compacting concrete are used: SCC without any mineral admixture, SCC incorporating 10% high reactivity metakaolin, SCC incorporating 30% limestone powder and SCC incorporating 10% high reactivity metakaolin plus 30% limestone powder. To determine self-compatibility features for those types of concrete, different test methods are adopted such as: slump flow, V-funnel, L-box and U-box. The results of this tests show the self-compatibility requirements were fulfilled for all mixes. Compressive, splitting tensile strength, static modulus of elasticity, weight change, length change and ultrasonic pulse velocity were investigated for all types of self-compacting concrete at 28, 60, 90, 120 and 180 days age. Results show that under the action of aggressive solution, the rate of improvement in mechanical properties of the specimens were decreased with age increase compared with rate of improvement in mechanical properties of the specimens cured in tap water. The results also indicated that HRM-SCC demonstrates more resistant to external sulfate attack than other types of SCC mixes