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Computers and Concrete
  Volume 21, Number 1, January 2018 , pages 087-94
DOI: https://doi.org/10.12989/cac.2018.21.1.087
 


Influence of high temperature on mechanical properties of concrete containing recycled fine aggregate
Jiong-Feng Liang, En Wang, Xu Zhou and Qiao-Li Le

 
Abstract
    This paper presents the results of an experimental study to investigate the influences of high temperatures on the mechanical properties of concrete containing recycled fine aggregate. A total of 150 concrete prisms (100x100x100 mm) are cast and heated under five different temperatures (20oC, 200oC, 400oC, 600oC, 800oC ) for test. The results show that the mass loss, compressive strength, elastic modulus, splitting tensile strength of concrete specimens containing recycled fine aggregate decline significantly as the temperature rise. At the same temperature, the compressive strength, splitting tensile strength, elastic modulus of concrete specimens containing recycled coarse aggregate and recycled fine aggregate (RHC) is lower than that of concrete specimens containing natural coarse aggregate and recycled fine aggregate (RFC). The shape of stress–strain curves of concrete specimens at different temperatures is different, and the shape of that become flatter as the temperature rises. Normal concrete has better energy absorption capacity than concrete containing recycled fine aggregate.
 
Key Words
    recycled fine aggregate; concrete; elastic modulus; temperature; strength
 
Address
Jiong-Feng Liang: State Key Laboratory Breeding Base of Nuclear Resources and Environment, East China Institute of Technology, Nanchang, P.R. China; Faculty of Civil and Architecture Engineering, East China Institute of Technology, Nanchang, P.R. China
En Wang, Xu Zhou and Qiao-Li Le: Faculty of Civil and Architecture Engineering, East China Institute of Technology, Nanchang, P.R. China
 

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