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

Materials

Mar໚ Fenollera²  José Luis Míguez¹  Itziar Goicoechea²  Jaime Lorenzo³ 

[1] Department of Mechanical Engineering, Machines and Thermal Engines and Fluids, Industrial Engineering School, University of Vigo, Vigo 36310, Spain; E-Mail:;Department of Design in Engineering, Industrial Engineering School, University of Vigo, Vigo 36310, Spain; E-Mail:;Department of Materials Engineering, Applied Mechanics and Construction, Industrial Engineering School, University of Vigo, Vigo 36310, Spain; E-Mail:

关键词: self-compacting concrete;    recycled aggregate;    thermal conductivity;    infrared thermography;   

DOI  :  10.3390/ma8074457

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.