Influence of RAP aggregates on strength, durability and porosity of cement mortar

•28-day characteristic compressive strength was achieved by RAP25 and RAP50 mix.•Lower reduction in flexural strength compared to compressive strength.•Existing strength-porosity relations holds good for RAP mortar.•Erratic behavior in drying shrinkage for RAP mortar.•Increase in strength for partia...

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Bibliographic Details
Published in:Construction & building materials 2018-11, Vol.189, p.1105-1112
Main Authors: Abraham, Sarah Mariam, Ransinchung, G.D.R.N
Format: Article
Language:English
Subjects:
Analysis
Asphalt pavements
Building materials durability
Cement mortar
Cements (Building materials)
Compressive strength
Maintenance and repair
Measurement
Mechanical properties
Mercury Intrusion Porosimetry
Porosity
Reclaimed Asphalt Pavement
Strength
Sulfate resistance
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Summary:•28-day characteristic compressive strength was achieved by RAP25 and RAP50 mix.•Lower reduction in flexural strength compared to compressive strength.•Existing strength-porosity relations holds good for RAP mortar.•Erratic behavior in drying shrinkage for RAP mortar.•Increase in strength for partially replaced mixes under sulfate attack. The influence of fine fraction of Reclaimed Asphalt Pavement (RAP) aggregates on mechanical, durability and porosity characteristics of cement mortar was studied when the same was used as a replacement of Natural fine aggregates (NA) at 25%, 50%, 75% and 100% by volume. The stipulated 28-day characteristic compressive strength was achieved by mortar mixes with 25% and 50% of RAP content. Porosity, determined through Mercury Intrusion Porosimetry (MIP), increases with RAP content and existing strength – porosity models (Hasselman D.P.H, Balshin M.Y, Ryshkewitch E. and Schiller K.K.) holds good. Drying shrinkage of RAP mortar mixes showed erratic behavior, whereas partially replaced mixes (25% and 50%) showed increase in compressive strength under sulfate attack.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2018.09.069