Foam Concrete Produced with Recycled Concrete Powder and Phase Change Materials

Osman Gencel, Mehrab Nodehi, Gökhan Hekimoğlu, Abid Ustaoğlu, Ahmet Sarı, Gökhan Kaplan, Oguzhan Yavuz Bayraktar, Mucahit Sutcu and Togay Ozbakkaloglu
Additional contact information
Osman Gencel: Civil Engineering Department, Faculty of Engineering, Architecture and Design, Bartin University, 74100 Bartin, Turkey
Mehrab Nodehi: Ingram School of Engineering, Texas State University, San Marcos, TX 78666, USA
Gökhan Hekimoğlu: Department of Metallurgical and Material Engineering, Karadeniz Technical University, 61080 Trabzon, Turkey
Abid Ustaoğlu: Department of Mechanical Engineering, Faculty of Engineering, Architecture and Design, Bartin University, 74100 Bartin, Turkey
Ahmet Sarı: Department of Metallurgical and Material Engineering, Karadeniz Technical University, 61080 Trabzon, Turkey
Gökhan Kaplan: Civil Engineering Department, Ataturk University, 25030 Erzurum, Turkey
Oguzhan Yavuz Bayraktar: Civil Engineering Department, Kastamonu University, 37150 Kastamonu, Turkey
Mucahit Sutcu: Department of Materials Science and Engineering, Izmir Katip Celebi University, 35620 Izmir, Turkey
Togay Ozbakkaloglu: Ingram School of Engineering, Texas State University, San Marcos, TX 78666, USA

Sustainability, 2022, vol. 14, issue 12, 1-25

Abstract: In construction industry, phase change materials (PCMs), have recently been studied and found effective in increasing energy efficiency of buildings through their high capacity to store thermal energy. In this study, a combination of Capric (CA)-Palmitic acid (PA) with optimum mass ratio of 85–15% is used and impregnated with recycled concrete powder (RCP). The resulting composite is produced as foam concrete and tested for a series of physico-mechanical, thermal and microstructural properties. The results show that recycled concrete powder can host PCMs without leaking if used in proper quantity. Further, the differential scanning calorimetry (DSC) results show that the produced RCP/CA-PA composites have a latent heat capacity of 34.1 and 33.5 J/g in liquid and solid phases, respectively, which is found to remain stable even after 300 phase changing cycles. In this regard, the indoor temperature performance of the rooms supplied with composite foams made with PCMs, showed significantly enhanced efficiency. In addition, it is shown that inclusion of PCMs in foam concrete can significantly reduce porosity and pore connectivity, resulting in enhanced mechanical properties. The results are found promising and point to the suitability of using RCP-impregnated PCMs in foam composites to enhance thermo-regulative performance of buildings. On this basis, the use of PCMs for enhanced thermal properties of buildings are recommended, especially to be used in conjunction with foam concrete.

Keywords: recycled concrete powder; phase change materials; foam concrete; capric and palmitic acid; thermal energy storage (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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