Thermal Transmission Properties of Sustainable Concrete with Supplementary Cementitious Materials

Abstract:

Understanding the thermal properties of a construction material is necessarily to evaluate its heat transfer resistance that has a major contribution to the energy-efficiency required to achieve sustainable structure. Thermal properties are evaluated through three main parameters namely: thermal conductivity, thermal resistivity and thermal transmittance. The aforementioned parameters are commonly referred as K-value, R-value, and U-value respectively. Recent regulations by Dubai municipality enforced to use sustainable concrete in construction. This is by replacing cement with supplementary cementitious materials (SCMs), such as grand granulated blast furnace slag (GGBS) and fly ash. The use of grand granulated blast furnace slag (GGBS) at relatively high percentage replacement became a typical practice in ready-mixed concrete industry in Dubai. As such, it is essential to characterize the thermal properties of this sustainable concrete. The current paper investigates the thermal properties of sustainable concrete mixtures incorporating supplementary cementitious materials, air entrainment additives, polypropylene and hybrid synthetic fiber. K-value, R-value and U-value are evaluated in accordance with ASTM C518. Additionally, hardened density of all investigated mixtures are measured. The results show that the foamed concrete has better heat transfer resistance than that for the non-air entrained mixture.

• Periodical: Key Engineering Materials (Volume 853)
• Pages: 142-149
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.853.142
• Online since: July 2020
• Authors: Ahmad Khartabil*, Samer Al Martini
• Keywords: Fly Ash, Grand Granulated Blast Furnace Slag, Light Weight, Supplementary Cementitious Materials, Thermal Conductivity, Thermal Resistivity, Thermal Transmittance

References

[1] Al Martini, S., & Khartabil, A. (2018). Bulk Electical Conductivity to Assess Chloride Penetration in Reinforced Concrete Bridges. 10th International Conference on Short and Medium Span Bridges, (pp.199-8). Quebec.

[2] Al Martini, S., Khartabil, A., & Sabouni, A. (2017). Sustainable Concrete Using Recycled Aggregate and Supplementary Cementitious Materials. Leadership in Sustainable Infrastructure (pp. EMM571-1). Vancouver: Canadian Society for Civil Engineering.

DOI: 10.4028/www.scientific.net/kem.803.246

[3] Cavalline, T. L., Castrodale, R. W., Freeman, C., & Wall, J. (2017, December). Impact of Lightweight Aggregate on Concrete Thermal Properties. ACI Materials Journal, 114(6), 945-956.

DOI: 10.14359/51701003

[4] Jhatial, A. A., Goh, W. I., Mohamad, N., Alengaram, U. J., & Mo, K. H. (2018). Effect of Polypropylene Fibres on the Thermal Conductivity of Lightweight Foamed Concrete. Malaysia Technical Universities Conference on Engineering and Technology. 150. Penang: MATEC Web of Conferences.

DOI: 10.1051/matecconf/201815003008

[5] Xu, Y., & Chung, D. (2000). Cement of High Specific Heat and High Thermal Conductivity, Obtained by Using Silane and Silica Fume as Admixtures. Cement and Concrete Research, 1175 - 1178.

DOI: 10.1016/s0008-8846(00)00296-9

[6] Jhatial, A. A., Inn, G. W., Mohamad, N., Alengaram, J., Mo, K. H., & Abdullah, R. (2017). Influence of Polypropylene Fibres on the Tensile Strength and Thermal Properties of Various Densities of Foamed Concrete. Global Congress on Construction, Material and Structural Engineering. Johor: IOP Conference Series: Materials Science and Engineering.

DOI: 10.1088/1757-899x/271/1/012058

[7] Mydin, M. O., Awang, H., & Roslan, A. F. (2012). Determination of Lightwieght Foamed Concrete Thermal Properties Integrating Various Additives. Elixir Cement and Concrete Composites International Journal (48), 9286-9291.

[8] Wang, Q., Shi, Y., Shi, J., Zhang, Y., & Liu, W. (2015). An Experimental Study on Thermal Conductivity of Ceramsite Cellular Concrete. International Conference on Structural, Mechanical and Materials Engineering, (pp.64-69). Dalian.

DOI: 10.2991/icsmme-15.2015.16