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Journal of Modern Mechanical Engineering and Technology

Articles

Vol. 5 (2018)

Experimental Investigation and Analytical Study on the Flexural Behavior of Reinforced Recycled Aggregate Concrete Beams

DOI
https://doi.org/10.15377/2409-9848.2018.05.1
Submitted
September 11, 2018
Published
2018-09-11

Abstract

The paper presents an experimental study on the flexural behavior of reinforced beams made of natural and recycled gravels under monotonic loading. 20x25x170 cm beams specimens were prepared using two reinforcement ratios and were cast from two concrete mixtures. The two concretes are respectively a mixture of natural aggregates and a concrete with 100% recycled gravels of C35/45 strength class, S4 class of workability and a constant W/C ratio.

The results reported in this paper are those of experiments performed in the framework of this study beside 118 data sets taken from the literature on the flexural behavior of natural (NAC) and recycled aggregate concrete (RAC).

The principal results of bending tests show that flexural capacity of recycled aggregate concrete beams is similar to the flexural capacity of natural aggregate concrete beams for the service and ultimate loading. However, cracking moment, maximum crack spacing, crack heights and deflection under serviceable load are affected by the use of recycled aggregates.

Experimental results of the extensive data base were compared to load-carrying capacities and deflections calculated according to Eurocode 2 (EC2). The comparisons show that the method of deflection calculation does not correctly predict the experimental results.

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