Determination of Recycled Aggregate Concrete Degradation By Resonance Frequency Analysis
AuthorsJanković, Ksenija S.
Stanković, Srboljub J.
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The evaluation of the dynamic modulus of elasticity of twelve different concrete mix proportions as a function of the density and degradations due to freeze/thaw cycles is presented in this paper. Pore system and saturation are the main factors for concrete freeze-thaw resistance. The frequency analysis of ultrasonic waves in concrete after every 25 cycles was done. Dynamic modulus of elasticity was determination by resonance frequency analysis. This parameter is 35-50% smaller for concrete with recycled bricks as aggregate than ordinary concrete. For all concrete mixes dynamic and static (measured by destructive testing) modules of elasticity were compared.
Keywords:dynamic modulus of elasticity / ultrasonic waves / freeze-thaw resistance / recycled aggregate concrete
Source:Revista Romana de Materiale-Romanian Journal of Materials, 2011, 41, 1, 22-25
- Ministry of Science and Technological Development, Republic of Serbia