Abstract
This study deals with an experimental and numerical investigation focused on the total shrinkage of concrete made with recycled coarse aggregates (RCA) and subjected to various isothermal temperatures. The objective of the experimental work is to assess the influence of the external temperatures (20, 35 and 50 °C) and the percentage of RCA replacements on the total shrinkage of recycled aggregates concrete. Natural coarse aggregates (NCA) are substituted by RCA at different weight levels (0%, 25%, 50%, 75% and 100%). The obtained results relate that the mechanical properties are adversely affected by the RCA replacement ratio. In addition, the total shrinkage strain rises with increase in the replacement ratio and the curing temperature. On the other hand, finite element analysis (FEA) using ANSYSⒸ software is used to predict the shrinkage of concrete regarding the thermal and mechanical properties. The shrinkage is estimated by means of the maturity approach and the two-phase serial model. The results founded from the FEA illustrate a good accuracy with the experimental ones.
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