Self-consolidating concrete represents one of the most important recent advances in the concrete industry. Due to the rapid growth of the use of this type of concrete, it is evident that research focused on assessing its mechanical properties compared with conventional concrete is requested in order to verify design requirements and codes procedures. Self-consolidating concrete modulus of elasticity property, using materials and admixtures commercially available in the island of Puerto Rico is evaluated in this paper to determine whether it is actually lower than that of conventional concrete or not. Other properties such as compressive strength, segregation tendency, unit weight and slump flow were also examined. Forty self-consolidating concrete mixtures were made under laboratory conditions varying different water-to-cement ratios, coarse-to-total aggregate ratios, and total aggregate volume content. Results show that self-consolidating concrete appears to have similar values of modulus of elasticity as those obtained for conventional concrete mixtures, as long as both types of concrete have similar aggregate volume content. A lower modulus of elasticity is expected for self-consolidating mixtures when the total aggregate volume is decreases. However, expressions given by ACI code to compute modulus of elasticity continues being acceptable to predict self-consolidating concrete modulus of elasticity.
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