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Int. J. Mol. Sci. 2015, 16(4), 8027-8039; doi:10.3390/ijms16048027

Development of Carbon Nanotube Modified Cement Paste with Microencapsulated Phase-Change Material for Structural–Functional Integrated Application

1
Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil Engineering, Shenzhen University, Shenzhen 518060, China
2
Department of Civil and Environmental Engineering, School of Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China
3
Department of Civil Engineering, COMSATS Institute of Information Technology, Abbottabad Campus, Abbottabad 22010, Pakistan
*
Authors to whom correspondence should be addressed.
Academic Editor: Qinghua Qin
Received: 28 February 2015 / Revised: 3 April 2015 / Accepted: 8 April 2015 / Published: 10 April 2015
(This article belongs to the Special Issue Advances in Anisotropic and Smart Materials)
View Full-Text   |   Download PDF [1154 KB, uploaded 10 April 2015]   |  

Abstract

Microencapsulated phase-change materials (MPCM) can be used to develop a structural–functional integrated cement paste having high heat storage efficiency and suitable mechanical strength. However, the incorporation of MPCM has been found to degrade the mechanical properties of cement based composites. Therefore, in this research, the effect of carbon nanotubes (CNTs) on the properties of MPCM cement paste was evaluated. Test results showed that the incorporation of CNTs in MPCM cement paste accelerated the cement hydration reaction. SEM micrograph showed that CNTs were tightly attached to the cement hydration products. At the age of 28 days, the percentage increase in flexural and compressive strength with different dosage of CNTs was found to be up to 41% and 5% respectively. The optimum dosage of CNTs incorporated in MPCM cement paste was found to be 0.5 wt %. From the thermal performance test, it was found that the cement paste panels incorporated with different percentages of MPCM reduced the temperature measured at the center of the room by up to 4.6 °C. Inverse relationship was found between maximum temperature measured at the center of the room and the dosage of MPCM. View Full-Text
Keywords: carbon nanotube; cement paste; microencapsulated phase-change material; structural–functional integrated materials; mechanical properties; thermal energy storage carbon nanotube; cement paste; microencapsulated phase-change material; structural–functional integrated materials; mechanical properties; thermal energy storage
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Cui, H.; Yang, S.; Memon, S.A. Development of Carbon Nanotube Modified Cement Paste with Microencapsulated Phase-Change Material for Structural–Functional Integrated Application. Int. J. Mol. Sci. 2015, 16, 8027-8039.

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