Paper Title:
Effect of Fly Ash and Slag Powder on Coefficient of Thermal Expansion of Concrete
  Abstract

In order to study the effect of fly ash (FA) and slag powder (SP) on coefficient of thermal expansion (CTE) of concrete, the influence of FA and SP to CTE of concrete was compared, the influence of replacement proportion of FA to CTE of concrete was tested, and the unhydrate mineral admixture particles were observed with SEM and validate with Energy Spectrometry. The results showed that the influence of FA and SP to CTE of concrete is different, the CTE of SP concrete is near to the norm concrete,but is higher than the FA concrete; With the replacement proportion of FA increased, the CTE of concrete decreased; The per strength CTE increased obviously when the replacement proportion exceed 10%, and the decrease of strength badly when the replacement proportion of FA exceed 30%; The unhydrate mineral admixture particles is one of the most important factors that influence the CTE of concrete, and the mineral admixture could influence the composite and the microstructure of cement paste, then cause the change of porosity and density.

  Info
Periodical
Advanced Materials Research (Volumes 374-377)
Chapter
Chapter 6: Technology for Preparing Building Material Environmental Friendly
Edited by
Hui Li, Yan Feng Liu, Ming Guo, Rui Zhang and Jing Du
Pages
1230-1234
DOI
10.4028/www.scientific.net/AMR.374-377.1230
Citation
G. B. Gao, C. X. Qian, Y. W. Wang, "Effect of Fly Ash and Slag Powder on Coefficient of Thermal Expansion of Concrete", Advanced Materials Research, Vols. 374-377, pp. 1230-1234, 2012
Online since
October 2011
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Price
$32.00
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