Concrete Manufactured with Crushed Asphalt as Partial Replacement of Natural Aggregates
Materiales de Construcción 2016
Luigi Coppola, Patricija Kara, Sergio Lorenzi

The paper focuses on the reuse of crushed asphalt (GA) as a partial replacement (up to 20%) of natural aggregates for concrete manufacture. Addition of GA aggregates produced a positive effect on workability loss. The GA mixes, however, showed a significant tendency to bleed and segregate at the highest replacement percentage applied. GA led to a decrease of compressive strength in concrete (with respect to that of the reference concrete) up to 50% due to the weakness of the cement paste / recycled aggregate interface. To compensate for this negative effect, a reduction of w/c for the GA concretes was necessary. A decrease of w/c allowed the GA concretes to show drying shrinkage values substantially similar to those of reference concrete with the same cement factor. The experimental results confirmed the possibility of partial substitution (max. 15%) of natural aggregates with crushed asphalt for making concrete.


Keywords
Concrete; Waste treatment; Aggregate; Workability; Compressive strength
DOI
10.3989/mc.2016.06515

Coppola, L., Kara, P., Lorenzi, S. Concrete Manufactured with Crushed Asphalt as Partial Replacement of Natural Aggregates. Materiales de Construcción, 2016, Vol.66, Iss.324, pp.e101-e101. ISSN 1988-3226. Available from: doi:10.3989/mc.2016.06515

Publication language
English (en)
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