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

Víctor Revilla-Cuesta; Marta Skaf; José Antonio Chica; José Antonio Fuente-Alonso; Vanesa Ortega-López

doi:10.1016/j.matlet.2020.128417

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

Víctor Revilla-Cuesta, Marta Skaf, José Antonio Chica, José Antonio Fuente-Alonso, Vanesa Ortega-López

General Services_Energy, Climate and Urban Transition

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

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.

Original language	English
Article number	128417
Journal	Materials Letters
Volume	278
DOIs	https://doi.org/10.1016/j.matlet.2020.128417
Publication status	Published - 1 Nov 2020

Keywords

Cyclical temperature variations
Linear thermal expansion coefficient
Recycled Concrete Aggregate (RCA)
Self-Compacting Concrete (SCC)
Thermal deformability
Thermal remaining strain

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10.1016/j.matlet.2020.128417

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title = "Thermal deformability of recycled self-compacting concrete under cyclical temperature variations",

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.",

keywords = "Cyclical temperature variations, Linear thermal expansion coefficient, Recycled Concrete Aggregate (RCA), Self-Compacting Concrete (SCC), Thermal deformability, Thermal remaining strain",

author = "V{\'i}ctor Revilla-Cuesta and Marta Skaf and Chica, {Jos{\'e} Antonio} and Fuente-Alonso, {Jos{\'e} Antonio} and Vanesa Ortega-L{\'o}pez",

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doi = "10.1016/j.matlet.2020.128417",

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T1 - Thermal deformability of recycled self-compacting concrete under cyclical temperature variations

AU - Revilla-Cuesta, Víctor

AU - Skaf, Marta

AU - Chica, José Antonio

AU - Fuente-Alonso, José Antonio

AU - Ortega-López, Vanesa

PY - 2020/11/1

Y1 - 2020/11/1

N2 - 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.

AB - 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.

KW - Cyclical temperature variations

KW - Linear thermal expansion coefficient

KW - Recycled Concrete Aggregate (RCA)

KW - Self-Compacting Concrete (SCC)

KW - Thermal deformability

KW - Thermal remaining strain

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JO - Materials Letters

JF - Materials Letters

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

Abstract

Keywords

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