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Experimental Study on Thermal Conductivity of Self-Compacting Concrete with Recycled Aggregate

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Department of Design in Engineering, Industrial Engineering School, University of Vigo, Vigo 36310, Spain
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Department of Mechanical Engineering, Machines and Thermal Engines and Fluids, Industrial Engineering School, University of Vigo, Vigo 36310, Spain
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Department of Materials Engineering, Applied Mechanics and Construction, Industrial Engineering School, University of Vigo, Vigo 36310, Spain
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Author to whom correspondence should be addressed.
Academic Editor: Jorge de Brito
Materials 2015, 8(7), 4457-4478; https://doi.org/10.3390/ma8074457
Received: 27 April 2015 / Revised: 6 July 2015 / Accepted: 7 July 2015 / Published: 20 July 2015
The research focuses on the use of recycled aggregate (RA), from waste pieces generated during production in precast plants for self-compacting concrete (SCC) manufactured with a double sustainable goal: recycle manufacturing waste (consumption) and improvement of the thermal properties of the manufactured product (energy efficiency). For this purpose, a mechanical study to ensure technical feasibility of the concrete obtained has been conducted, as well as a thermal analysis of recycled SCC specimens of 50 N/mm2 resistance, with different RA doses (0%, 20%, 50% and 100%). The main parameters that characterize a SCC in both states, fresh (slump-flow) and hard (compressive strength), have been tested; also, a qualitative analysis of the thermal conductivity using infrared thermography (IRT) and quantitative analysis with heat flow meter at three temperatures 20 °C, 25 °C and 30 °C have been performed. The results suggest the existence of two different thermal behaviors: concretes with 0% and 20% of RA, and on the other hand concretes with 50% and 100% of RA. It has also demonstrated the validity of the IRT as sampling technique in estimating the thermal behavior of materials having reduced range of variation in parameters. View Full-Text
Keywords: self-compacting concrete; recycled aggregate; thermal conductivity; infrared thermography self-compacting concrete; recycled aggregate; thermal conductivity; infrared thermography
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Fenollera, M.; Míguez, J.L.; Goicoechea, I.; Lorenzo, J. Experimental Study on Thermal Conductivity of Self-Compacting Concrete with Recycled Aggregate. Materials 2015, 8, 4457-4478.

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