Thermal deformability of recycled self-compacting concrete under cyclical temperature variations

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URI: https://hdl.handle.net/11556/3114
ISSN: 0167-577X
DOI: 10.1016/j.matlet.2020.128417
Publication date
2020-11-01
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Abstract
Recycled Concrete Aggregate (RCA) has greater elasticity than natural aggregate, due to the presence of adhered hydrated mortar in the coarse fraction, and mortar particles in the fine fraction. To evaluate this aspect under temperature variations, four Self-Compacting Concretes (SCC) made with 100% coarse and/or fine RCA were subjected to cyclical temperature variations between 70 °C and 20 °C and between −15 °C and 20 °C. The addition of RCA, especially in the coarse fraction, increased the thermal deformability, although the difference tended to decrease with the number of cycles, especially in positive temperature variations. This study concludes that the traditional upper limit of the linear thermal expansion coefficient for concrete (1.2·10−5 °C−1) is also suitable when RCA is incorporated.
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Publisher Copyright: © 2020 Elsevier B.V.
Keywords
Cyclical temperature variations , Linear thermal expansion coefficient , Recycled Concrete Aggregate (RCA) , Self-Compacting Concrete (SCC) , Thermal deformability , Thermal remaining strain , General Materials Science , Condensed Matter Physics , Mechanics of Materials , Mechanical Engineering
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journal article
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Revilla-Cuesta , V , Skaf , M , Chica , J A , Fuente-Alonso , J A & Ortega-López , V 2020 , ' Thermal deformability of recycled self-compacting concrete under cyclical temperature variations ' , Materials Letters , vol. 278 , 128417 . https://doi.org/10.1016/j.matlet.2020.128417