Research on Hydration Mechanism of 50% Portland Cement–50% Fly Ash Systems with TA and NMR Techniques

Article Preview

Abstract:

In this article, research on hydration mechanism of 50% Portland cement–50% fly ash(FA) systems has been carried out with TAM AIR Isothermal Calorimete (TA) and 29Si nuclear magnetic resonance(NMR) spectroscopy. The research was including hydration heat liberation behavior and nanostructure of C-S-H gel in hydrated cement systems. The addition of fly ash could observably reduce the total hydration heat and the mean chain length (MCL) of C-S-H gel was found to be and respectively for 7-day-old and 28-day-old.

You might also be interested in these eBooks

Info:

Periodical:

Advanced Materials Research (Volumes 287-290)

Pages:

1135-1139

Citation:

Online since:

July 2011

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2011 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] Chinese Metallurgy and Construction Association.Code for Construction of Mass Concrete (GB50496-2009).

Google Scholar

[2] Yuan Runzhang, Cementitious materials, Wuhan Wuhan University of Technology Press (1996) 121~122. (in Chinese).

Google Scholar

[3] A. V .Girao, I.G. Richardson, R. Taylor, R. M.D. Brydson. Composition, morphology and nanostructure of C–S–H in 70% white Portland cement–30% fly ash blends hydrated at 55 °C [J]. Cement and Concrete Research, 2010, 40: 1135~1140.

DOI: 10.1016/j.cemconres.2010.03.012

Google Scholar

[4] A. V. Girao, I. G. Richardson, C. B. Porteneuve, R. M. D. Brydson. Composition, morphology and nanostructure of C–S–H in white Portland cement–fly ash blends hydrated at 85°C[J]. Advances in Applied Ceramics,2007, 106(6):283~293.

DOI: 10.1179/174367607x228098

Google Scholar

[5] A. Palomoz, A. Fernandez-Jimenez, G. Kovalchuk, L. M. Ordonez, M. C. Naranjo. Opc-fly ash cementitious systems: study of gel binders produced during alkaline hydration[J].Advances in Geopolymer science &Technology, 2007,42:2958~2966.

DOI: 10.1007/s10853-006-0585-7

Google Scholar

[6] A. Fernandez-Jimenez, A. G. de la Torre, A. Palomo, G. Lopez-Olmo, M.M. Alonso a, M.A.G. Aranda. Quantitative determination of phases in the alkaline activation of fly ash, Part II: Degree of reaction[J]. Fuel,2006, 85:1960~1969.

DOI: 10.1016/j.fuel.2006.04.006

Google Scholar

[7] Wang Lei, He Zhen, Cai Xinhua. Quantitative analysis of fly ash-cement hydration by 29Si MAS NMR[J].Journal of the Chinese Ceramic Society, 2010, 38(11):2212~2216.

Google Scholar

[8] S. Martinez-Ramirez, M. Frias. The effect of curing temperature on white cement hydration[J]. Construction and Building Materials, 2009, 23: 1344~1348.

DOI: 10.1016/j.conbuildmat.2008.07.012

Google Scholar