Paper Title:
Effect of Carbonation on the Microstructure of Concrete Containing Fly Ash and Expansive Admixture
  Abstract

The effects of carbonation on the microstructure of concrete containing fly ash and expansive admixture are investigated in this paper. Eight mix proportions of the concrete are designed in the experiment with the different replacement levels of the Portland cement with the fly ash and the expansive admixture. The specimens cured in accelerated carbonation condition for 3 days, 7 days and 28 days are used for macro and micro tests. MIP test is used to analyze the influence on internal pore structure of concrete by carbonation reacts. The changes of Ca(OH)2 and CaCO3 contents are measured with TG/DSC analysis. The results indicate that carbonation reaction can make concrete denser. Replacing Portland cement with fly ash and expansive admixture increases the carbonation rate of concrete and fly ash blended in concrete can improve the pore structure of concrete. Apart from the reaction of Ca(OH)2 and CO2, the carbonation reaction of other hydration product also exit in the accelerated carbonation process.

  Info
Periodical
Advanced Materials Research (Volumes 347-353)
Chapter
Chapter 13: Green Building Materials and Energy-Saving Buildings
Edited by
Weiguo Pan, Jianxing Ren and Yongguang Li
Pages
4074-4080
DOI
10.4028/www.scientific.net/AMR.347-353.4074
Citation
L. Q. Tu, Z. H. Shui, W. Chen, W. B. Xu, J. T. Ma, "Effect of Carbonation on the Microstructure of Concrete Containing Fly Ash and Expansive Admixture", Advanced Materials Research, Vols. 347-353, pp. 4074-4080, 2012
Online since
October 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Yun Feng Li
Abstract:As an active admixture, super fine steel slag powder can be mixed into concrete to produce high performance concrete. The microstructures...
503
Authors: Wei Zhang, Xiao Yao, Ru Mu
Chapter 2: Manufacturing and Design Science
Abstract:A new admixture increasing the density of cement-base composites and hence preventing the penetration of chloride ions is developed and...
1315
Authors: Shao Min Song, Xiao Lun Wang, Lin Wang
Chapter 2: Building Materials
Abstract:This paper studies the effects of high-volume composite mineral admixture made of limestone powder and low-quality fly ash on the properties...
351
Authors: Si Yu Zou, Ran Huang, An Cheng, Wei Ting Lin, Jia Liang Chang
Chapter 4: Architecture, Civil and Industrial Engineering
Abstract:The study evaluates the properties of concrete mixed with inorganic silicate admixture. The admixture was used in proportions of 3%, 5%, and...
1235