Current Knowledge and Pending Research on Sulfate Resistance of Recycled Aggregate Concrete

Lautaro R. Santillán (), Claudio J. Zega and Edgardo F. Irassar ()
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Lautaro R. Santillán: Instituto de Investigaciones en Tecnología y Ciencias de la Ingeniería (IITCI CONICET-UNCo), Neuquén 8300, Argentina
Claudio J. Zega: Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) CCT-La Plata, La Plata 1900, Argentina
Edgardo F. Irassar: Departamento de Ingeniería Civil y Agrimensura, Universidad del Centro de la Provincia de Buenos Aires (UNCPBA), Olavarría 7400, Argentina

Sustainability, 2024, vol. 16, issue 3, 1-21

Abstract: The building sector’s sustainability requires construction and demolition waste (CDW) to contribute to the circular economy. Among the CDW, recycled concrete aggregates (RA) have been mainly studied to replace natural aggregates. Still, the approval of their use in regulations and standards is slower. Some barriers to the adoption of RA are related to the durability of recycled aggregate concrete (RAC). However, their physical and mechanical properties have been extensively studied. The durability risks associated with sulfate attacks have been solved for conventional concrete. However, sulfate attack on recycled concrete still raises numerous unsolved questions. In this literature review, the experience of sulfate attack on RAC is compiled and analyzed using a compressive framework highlighting the most relevant aspects of the new matrix in RAC and the old matrix of RA to support its relevance to the damaging sulfate process. Suggestions for further research are presented to understand the full extent of this issue and contribute to incorporating and extending recycled aggregates into existing regulations.

Keywords: recycled concrete; recycled concrete aggregates; sulfate attack; review (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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