MECHANICAL PROPERTIES OF SELF COMPACTING CONCRETE | ||
| ERJ. Engineering Research Journal | ||
| Article 1, Volume 25, Issue 2, April 2002, Pages 1-11 PDF (529.87 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/erjm.2002.70637 | ||
| Author | ||
| A.G. Abdel-Rahman | ||
| Lecturer, Eng. Materials Dept., Faculty of Eng., Zagazig University, Zagazig, Ea"t. | ||
| Abstract | ||
| Self-compacting concrete (SCC) is a new concept for fresh and hardened concrete and refers to the ability of fi-esh mixtures to deform and undergo change in shape and pass through obstacle under its own weight without exhibiting segregation and to ensure proper filling of the formwork. An experimental investigation was conducted to study the properties of hardened self-compacting concrete (SCC) and its bond strength. In this study, the hardened properties of (SCC) containing different sizes of coarse aggregate (20, 14 and 10 mm) were experimentally investigated and compared with those of conventional concrete. The effect of different dosage of viscosity 'enhanced admixture (VEA) (0,0.5, 1, 1.5 and 2% of cement weight) on the properties of hardened concrete are also discussed in this work. The mechanical properties of hardened self-compacting concrete (SCC) were investigated in terms of standard compressive strength and splitting tensile strength. Bond strengths were also determined for reinforcing bars embedded in concrete according to the Rilem test specification. Results from these tests show that higher size of coarse aggregate was found more suitable to ensure high compressive and tensile strength than corcrete made by smaller size of aggregate. A significant increase in bond strength was found when using higher size of coarse aggregate especially when comparing (SCC) to ordinary concrete. Also, higher values of compressive, tensile and bond strengths were obtained when using viscosity enhanced admixture (VEA) with a ratio of 1.5% of the cement weigh | ||
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