Behavior and Strength of Reinforced Recycled-Aggregate Concrete Beams
Monir M. Kamal1, Mohamed A. A. Saafan2, Noha M. Soliman3, Sumaya A. T. M. Helal4

1Monir M. Kamal, Professor at Civil Engineering Department, Faculty of Engineering, Menoufia University, Egypt.
2Mohamed A. A. Saafan, Professor at Civil Engineering Department, Faculty of Engineering, Menoufia University, Egypt.
3Noha M. Soliman, Lecturer at Civil Engineering Department, Faculty of Engineering, Menoufia University, Egypt.
4Sumaya A. T. M. Helal, Civil Engineering, Menoufia University, Egypt.

Manuscript received on 15 August 2015 | Revised Manuscript received on 25 August 2015 | Manuscript Published on 30 August 2015 | PP: 5-13 | Volume-4 Issue-6, August 2015 | Retrieval Number: F4140084615/15©BEIESP
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Abstract: In recent years, the world was increasingly attacked by the environmental pollution caused by the wastes out of quarries, building materials industry and construction demolishing besides; the conservation of natural materials resources has become of a top priority in all production sectors. The construction industry faced this challenge and has pioneered the development of new techniques for the reuse of the waste materials that it generates. However, these problems could be partially solved by using these wastes after recycling as coarse aggregate in concrete manufacture. This research was conducted to investigate the behavior and strength of reinforced recycled aggregate concrete beams cast with construction demolition wastes as coarse aggregates under flexural load. The effect of using recycled aggregate (RA) as total or partial replacement of natural aggregate on the behavior of this beams was studied. The main variables of this research were the type of the recycled aggregates (RA) and the percentage of the replacing the dolomite aggregate by recycled aggregates. Among these wastes were ceramics, marble, cement bricks, red bricks and lightweight bricks. Ten beams were cast and tested with dimensions (10×15×120cm). The reinforced recycled aggregate concrete (RRC) beams were divided into two groups according to the percentage of the replacement of the natural aggregate (NA) by recycled aggregates. The performance of the beams was investigated in terms of the initial crack load, ultimate flexural load, load-deflection response, energy absorption capacity, ductility index, load-strain response and cracking patterns. Out of this research wide applications could be achieved in concrete industry in structural applications with special precautions and protection regulations.
Keywords: Demolition Wastes, Recycle, Recycle Concrete, Recycle Aggregates, Recycled Concrete and Reinforced Concrete Beam.

Scope of the Article: Concrete Structures