Reactive Powder Concrete Essay

3342 Words Jul 18th, 2012 14 Pages
Concrete Repair, Rehabilitation and Retrofitting II – Alexander et al (eds)
© 2009 Taylor & Francis Group, London, ISBN 978-0-415-46850-3

Performance of Reactive Powder Concrete (RPC) with different curing conditions and its retrofitting effects on concrete member
T.P. Chang, B.T. Chen, J.J. Wang & C.S. Wu
Department of Construction Engineering, National Taiwan University of Science and Technology,
Taipei, Taiwan, ROC

ABSTRACT: The material performance of Reactive Powder Concrete (RPC) with two different curing conditions, water-curing of 25ºC and steam-curing of 85ºC and 95% relative humidity, were studied experimentally. The reinforcing effects of the RPC with two wrapping thicknesses of 10 and 15 mm, respectively, on the
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On the other hand, maximum compressive strengths for the commonly used normal weight concrete in most concrete structures are in the range of 30 to 60 MPa with the corresponding moduli of elasticity of 14 to 35 GPa (Mindess et al. 2003). Due to advantage of the super material properties, RPC has been applied to many real constructions where the substantial weight savings of structure can be appreciated and where its distinguished features of material property can be fully utilized (Adeline &
Cheyrezy 1998, Etinne et al. 2001, Rebentrost &
Cavill 2006). In a typical RPC mix proportioning, in order to enhance the homogeneity and optimize the density of concrete granular mixture, the coarse

aggregates of conventional concrete are totally eliminated such that the amounts of fine aggregate,
Portland cement and silica fume need to be substantially increased.
Because the least costly components of conventional concrete have been replaced by more expensive ingredients and the required addition of steel fiber in order to increase the tensile strength, the cost of RPC is estimated to be 5 to 10 times higher than that of traditional High-Performance Concrete. As a result, a cost-effective application of RPC is used for concrete repair and retrofit (Lee et al. 2007). In this study, the material performance of RPC with two different curing conditions, water-curing of 25ºC and steam-curing of 85ºC and 95%

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