Title: Rigidity Modified of Recycled Coarse Aggregate Concrete Beams Under Short-term Loading

Author(s): Wenhui Bai and Li Feng

Publication: China Concrete and Cement Products

Volume:

Issue: No.5 2010(Total 175)

Appears on pages(s): 67-70

Keywords: Recycled coarse aggregates, Recycled concrete, Beam, Short-term loading, Rigidity modified

DOI:

Date: 10/20/2010

Abstract:
The deflection under short-term loading of recycled coarse aggregate concrete beams is researched by using calculated formula of short-term rigidity in Concrete Structure Design Code（GB50010-2002）.According to testing the flexural performances of 6 recycled coarse aggregate beams with different recycled aggregate replacement ratio of 0%,50%,70% and 100% and reinforcement ratio of 0.68%,0.89% and 1.13%,the relationships between deflection,recycled aggregate replacement ratio and reinforcement ratio are analyzed.The statistical analysis is made by compared with measured values and calculated values of current concrete structure codes of the deflection of recycled coarse aggregate concrete beams.By experimental datas and statistical regression of literature datas,the rigidity modified formula of recycled coarse aggregate concrete beams are obtained under the effect of short-term loading.The calculation results are in good agreement with the experimental datas.The calculated formula of short-term rigidity of recycled concrete beams can accurately calculate the deflection under the effect of short-term loading of recycled coarse aggregate concrete beams,which can be referenced in engineering practice and correlative regulations.
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