An Evaluation of the Strength for Recycled Fine Aggregate Replacement in Cementitious Mortars

This research investigates the viability of high-strength Recycled Concrete Aggregate (RCA) sourced from demolished structures containing high-strength concrete as a substitute for natural fine aggregates (NA) in cementitious mortar applications. Concrete specimens (40 × 40 × 160 mm) were prepared i...

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Bibliographic Details
Published in:Buildings (Basel) 2024-02, Vol.14 (2), p.470
Main Authors: Mahmood, Ali, Nanos, Nikos, Begg, David
Format: Article
Language:English
Subjects:
Aggregates
Carbon
Cement
circular construction
Compressive strength
Concrete
Concrete aggregates
Concrete mixing
Corrosion
Energy consumption
fine recycled aggregate
Flexural strength
High strength concretes
Mortars (material)
Permeability
Ratios
Recycled materials
recycled mortar
recycled mortar aggregate
sustainable construction materials
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Summary:This research investigates the viability of high-strength Recycled Concrete Aggregate (RCA) sourced from demolished structures containing high-strength concrete as a substitute for natural fine aggregates (NA) in cementitious mortar applications. Concrete specimens (40 × 40 × 160 mm) were prepared in a controlled environment with varying percentages of RCA replacing NA, ranging from 0% to 100% in 10% increments. The resulting RCA aggregates exhibited lower weight for sizes from 0.01 to 1 mm compared to NA, and for 1 to 3 mm sizes, RCA weights were 145% to 177% higher than SS aggregates. After curing for 28 days, flexural and compressive strength tests were conducted on the batches. The average compressive strength for the 0% RCA batch was 66.26 MPa, while the 50% RCA batch showed the closest average compressive strength at 63.10 MPa. Batches with varying RCA levels displayed compressive strengths between 49.52 and 58.18 MPa. The highest flexural strength was observed in the 0% RCA batch, with the closest result for a batch containing RCA being the 50% RCA batch.
ISSN:2075-5309
2075-5309
DOI:10.3390/buildings14020470