Abstract
The current study firstly quantifies the electrical resistivity of Self Consolidating Concrete (SCC) prepared with Coarse Reused Concrete Aggregates (CrRCA) and Fine Reused Concrete Aggregates (FnRCA) at alternate substitutions of Coarse Natural Aggregates (CNA) and Fine Natural Aggregates (FNA) respectively. Secondly, the efficacy of Silica Fume (SF) and Metakaolin (MK) in compensating the loss in the performance of SCC on account of replacement of natural aggregates with recycled aggregates measured in terms of electrical resistivity has been assessed. For assessing the electrical resistivity of the SCC combinations, electrical resistivity tests were executed. The minimum electrical resistivity has been observed for complete substitution of Natural Aggregates (NA) with RA. Relative to the control combination across all curing periods, the electrical resistivity has been declined for substitution of CNA/FNA with CrRCA/FnRCA whereas, with the introduction of either SF/MK, it was enhanced considerably. The electrical resistivity of the SF/MK blended SCC combination prepared with 50% of CrRCA and 100% of FnRCA was noticed to be more than that of the control SCC combination across all curing periods. Based on the outcomes, suggestions have been made for the best combinations of CrRCA, FnRCA and cement additions for the optimum performance of SCC combinations.
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