Impact of using Recycled Demolition waste as Aggregates in Steel Fiber Reinforced Self-compacting Concrete on its Sulphate Resistance

[摘要] The objective of performing this study was to estimate the impact of replacement of natural aggregates (NAs) with the recycled demolition waste aggregates (rDWAs) on the sulphate resistance of steel fiber-reinforced self-compacting concrete (FRSCC). In this regard, 13 laboratory experiments were conducted and analyzed using central composite design (CCD) in combination with response surface methodology (RSM). The sulphate resistance was evaluated in the form of % reduction is compressive strength (CS) of the FRSCC samples after 28 days, 90 days and 120 days. It was revealed that after 28 days, 90 days and 120 days the % reduction in CS was 97%, 14.85% and 8.6% more than the control samples, respectively. Also, the % reduction in CS of the FRSCC samples showed a linear relation with both the process parameters i.e., % replacement of NAs with rDWAs and % dosage of steel fibers. The findings of this study are expected to encourage the reuse of rDWAs in FRSCC-based structures.

[学科分类] 材料科学（综合）