Long term deformations by creep and shrinkage in recycled aggregate concrete


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Title: Long term deformations by creep and shrinkage in recycled aggregate concrete

Author(s): A. Domingo, C. Lázaro, F. Gayarre, M. Serrano, C. López-Colina

Publication: RILEM

Volume: 43

Issue: 8

Appears on pages(s): 1147-1160

Keywords: Shrink, Creep, Recycled concrete, Recycled aggregate concrete

Date: 8/1/2010

The main aim of this work was to determine creep and shrinkage variations experienced in recycled concrete, made by replacing the main fraction of the natural aggregate with a recycled aggregate coming from waste concrete and comparing it to a control concrete. It was possible to state that the evolution of deformation by shrinkage and creep was similar to a conventional concrete, although the results after a period of 180 days showed the influence of the substitution percentage in the recycled aggregates present in the mixture. In the case when 100% coarse natural aggregate was replaced by recycled aggregate there was an increase in the deformations by creep of 51% and by shrinkage of 70% as compared to those experienced by the control concrete. The substitution percentages of coarse natural aggregate by coarse recycled aggregate were 20, 50 and 100%. Fine natural aggregate was used in all cases and the amount of cement and water–cement ratio remained constant in the mixture.

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