Effect of Nano-TiO₂ on Mechanical and Thermal Properties of Cement Composites for Thermal Energy Storage Materials

Abstract:

This research article presents the mechanical and thermal properties of cement-based composite for thermal energy storage materials enriched with containing nanoTiO₂ particle size (25 nm) and concentration (1-5 wt.%) were systematically investigated. Thermal properties coefficients were tested using a direct measuring instrument with surface probe (ISOMET2114). The influence of nanoTiO₂ on the performance, such as compressive strength, bulk density, thermal conductivity, volume heat capacity and thermal diffusivity of hardened composite cement pastes were studied for future solar thermal energy materials with better performance. According to the development of thermal storage materials and their application environment requirement in solar thermal power, the specimens were subjected to heat at 350°C and 900°C. It was observed that, before heating, the compressive strength is optimized at nanoTiO₂ amount of 2 wt%. Moreover, after heating at 350 °C and 900°C, the thermal conductivity and volume heat capacity of the cement paste enriched with nanoTiO₂ were significantly lesser than that of the before heating one.

• Periodical: Applied Mechanics and Materials (Volume 804)
• Pages: 115-118
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.804.115
• Online since: October 2015
• Authors: Pongsak Jittabut*
• Keywords: Cement Composites, Nano-TiO₂, Thermal Energy Storage Materials, Thermal/Mechanical Properties

References

[1] G. Antoni, et al., State of the art on high temperature thermal energy storage for power generation. Part 1—Concepts, materials and modellization, Sustainable Energy Rev. 14 (2010) 31-55.

DOI: 10.1016/j.rser.2009.07.035

[2] D. Laing, et al., Economic Analysis and Life Cycle Assessment of Concrete Thermal Energy Storage for Parabolic Trough Power Plants, J. Sol. Energy Eng. 132(4) (2010) 041013.

DOI: 10.1115/1.4001404

[3] D. Laing, et al., Solid Media Thermal Storage Development and Analysis of Modular Storage Operation Concepts for Parabolic Trough Power Plants, J. Sol. Energy Eng. 130(1) (2007) 011006.

DOI: 10.1115/1.2804625

[4] H. Li, et al., Economic assessment of the mobilized thermal energy storage (M-TES) system for distributed heat supply, Appl. Energy. 104 (2013) 178-186.

DOI: 10.1016/j.apenergy.2012.11.010

[5] H. Yuan, et al., Mechanical and thermal properties of cement composite graphite for solar thermal storage materials, Solar Energy. 86(11) (2012) 3227-3233.

DOI: 10.1016/j.solener.2012.08.011

[6] H. Yuan et al., Influence of nano-ZrO2 on the mechanical and thermal properties of high temperature cementitio, Construction and Building Materials. 48 (2013) 6-10.

[7] J.M. Fernández, et al., Influence of nanosilica and a polycarboxylate ether superplasticizer on the performance of lime mortars, Cem. Concr. Res. 43 (2013) 12-24.

DOI: 10.1016/j.cemconres.2012.10.007