The Effect of High Temperatures on the Mechanical Properties of Concrete with Different Strengths at Different Mixing Ratio

Hakim H. Ahmad, Abdul; A. Maeroof, Daroon

doi:10.32894/kujss.2015.124145

	The Effect of High Temperatures on the Mechanical Properties of Concrete with Different Strengths at Different Mixing Ratio
Kirkuk Journal of Science
Article 1, Volume 10, Issue 4, 2015, Pages 44-70 PDF (0 K)
DOI: 10.32894/kujss.2015.124145
Authors
Abdul Hakim H. Ahmad; Daroon A. Maeroof
Abstract
This research work includes an experimental study of the mechanical properties , as compressive strength, tensile strength, modulus of elasticity, and stress – strain relation for ordinary concrete. Different mixes of different cement content and W/C ratio considered at different high temperature. Nine different concrete mixes for different cement content and W/C ratio are exposed to four steps of high temperature (20, 200, 400, 600)°C for a duration of one hour. The results show that heating the concrete samples reduces the mechanical properties of the samples in a different percent for different mixes. The affect of high temperatures to modulus of elasticity , splitting tensile strength and compressive strength for concrete are different and various. It has been found that the concrete mixes of low strengths (a few cement and high W/C ratio) maintains compressive strength more than concrete mixes which have high strength (rich cement and low W/C ratio) when exposed to high temperatures. This effects generally vary from mix to another in some or all properties. In general there are less effect at (200°C) degree, then the changes become more sensitive at higher temperature ( 400, 600)°C.
Keywords
Concrete; High Temperature; mechanical properties; Cement content; C ratio

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