Comparative Study of the Mechanical Behavior of Self Compacting and Conventional Concreteswith Strength of 20-80 MPa

Ali, Mehdi; Asma,; M. Rasheed, Mohammed; F. Kheder, Ghazi

	Comparative Study of the Mechanical Behavior of Self Compacting and Conventional Concreteswith Strength of 20-80 MPa
Journal of Engineering and Sustainable Development
Article 1, Volume 12, Issue 3, 2008, Pages 52-66
Authors
Mehdi Ali; ; Mohammed M. Rasheed; Ghazi F. Kheder
Abstract
The aim of this study is to find a correlation between strength of different concrete specimen shapes and sizes of self-compacting concrete, to evaluate the mechanical properties (compressive strength, splitting tensile strength and modulus of elasticity) and compare them with conventional concrete.Self-compacting concrete mixes and conventional concrete mixes with different compressive strengths (20, 40, 60 and 80)MPa are used to determine the effects of: compressive strength, splitting tensile strength and modulus of elasticity on these relations. Water curing condition is used and the age tests are 7, 28 and 90 days for self-compacting concrete and 28 days for conventional concrete. The result obtained from this study indicates:The difference between results of cylinders/cubes of self-compacting concrete compressive strength are lesser than the difference of conventional concrete related to the slenderness of specimens.In splitting tensile strength for self-compacting, it appears the tendency the higher splitting tensile strength of self-compacting concrete compared with conventional concrete. The reason for this fact is given by the better microstructure, specially the smaller total porosity and the more even pore size distribution within the interfacial transition zone of self-compacting concrete.The modulus of elasticity of self-compacting concrete is less compared with conventional concrete because it often has a higher paste content

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