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Computers and Concrete
  Volume 21, Number 1, January 2018 , pages 39-46

Successive recycled coarse aggregate effect on mechanical behavior and microstructural characteristics of concrete
Deepankar K. Ashish and Preeti Saini

    With the increase in industrialization and urbanization, growing demand has enhanced rate of new constructions and old demolitions. To avoid serious environmental impacts and hazards recycled concrete aggregates (RCA) is being adopted in all over the world. This paper investigates successive recycled coarse aggregates (SRCA) in which old concrete made with RCA in form of concrete cubes was used. The cubes were crushed to prepare new concrete using aggregates from crushing of old concrete, used as SRCA. The mechanical behavior of concrete was determined containing SRCA; the properties of SRCA were evaluated and then compared with natural aggregates (NA). Replacement of NA with SRCA in ratio upto 100% by weight was studied for workability, mechanical properties and microstructural analysis. It was observed that with the increase in replacement ratio workability and compressive strength decreased but in acceptable limits so SRCA can be used in low strength concretes rather than high strength concrete structures.
Key Words
    successive recycled coarse aggregate; waste; fly ash strength; scanning electron microscope; X-ray diffraction
Deepankar K. Ashish: Department of Civil Engineering, Maharaja Agrasen University, Baddi 174103, India; Department of Civil Engineering, Punjab Engineering College (Deemed to be University), Chandigarh 160012, India
Preeti Saini: Department of Civil Engineering, Kurukshetra University, Kurukshetra 136119, India

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