Properties of cementitious rendering mortar prepared with recycled fine aggregates |
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Authors: | Chi-sun Poon and Shi-cong Kou |
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Affiliation: | (1) Department of Civil Engineering and Architecture, Instituto Superior T?cnico, Technical University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon, Portugal; |
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Abstract: | The results of an experimental study on investigating the properties of cementitious rendering mortars prepared with a recycled
fine aggregate (RA) were presented. The RA was obtained from a recycling plant in which mixed demolition wastes were processed
by mechanical crushing, sieving and sorting operations. Two series of rendering mortar mixes were prepared with a constant
water/cement and a constant aggregate/cement ratios of 0.55 and 3 respectively. River sand and natural crushed rock fine were
originally used in the two series separately, and they were consistently replaced by 25%, 50%, 75% and 100% by the recycled
aggregate. The experimental results showed that mechanical properties, such as compressive strength, flexural strength and
modulus of elasticity of the mortars prepared with the RA were lower than the mortars made with the natural aggregates. Nevertheless,
the bond strength at the interface between the mortar and masonry bricks determined by the Triplet test was found to be higher
for the mortars prepared with the RA. |
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Keywords: | |
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