Paper Title:
Studies about the Initial Curing Conditions on the Carbonation Resistance of Fly-Ash Concrete
  Abstract

Studies about the resistance of carbonation capability of fly-ash (FA) concrete at different initial curing regimes and exposure time through accelerated carbonation experiments were made. Firstly, 30% replacement ratio fly-ash concrete specimens were fabricated and cured in 20°C, 30°C and 40°C water for 3d, 7d, 14d and 28d respectively, and cured in a standard air environment (20±2°C, relative humidity ≥95% ) for 28d. As a comparison, ordinary Portland concrete (OPC) specimens were also made and cured in 30°C water for 7d, and standard curing for 28d. After the initial curing, all the specimens were taken out and placed indoor natural environment. When specimen age reach 30d, 60d and 120d, 2 weeks accelerated carbonation experiments were made and concrete carbonation depth were measured. In addition to this, hydration degrees of fly ash at different initial curing conditions were measured using the selective dissolve method. Results show that the initial curing conditions play an important role in the carbonation resistance of FA concrete. Initial water curing is beneficial to the development of carbonation resistance of FA and OPC concrete. Prolonging initial curing time and increasing curing temperature is beneficial for the carbonation resistance of FA concrete. For the same curing conditions, carbonation rate of FA concrete is usually higher than OPC concrete, but with the increase of initial curing temperature, the difference can be reduced.

  Info
Periodical
Advanced Materials Research (Volumes 250-253)
Edited by
Guangfan Li, Yong Huang and Chaohe Chen
Pages
920-924
DOI
10.4028/www.scientific.net/AMR.250-253.920
Citation
E. L. Lu, G. Li, Y. S. Yuan, O. Geng, J. M. Du, "Studies about the Initial Curing Conditions on the Carbonation Resistance of Fly-Ash Concrete", Advanced Materials Research, Vols. 250-253, pp. 920-924, 2011
Online since
May 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: Hui Xu, Zhan Qing Chen, Su Bei Li, Wei Huang, Dan Ma
Abstract:Making full use of fly ash (FA) is an important part of sustainable materials development in the word. This paper discussed the carbonation...
327
Authors: Jian Hua Wu, Yun Lan Liu
Abstract:This paper studies the influence of different mineral admixtures(fly ash and ground granulated blast furnace slag)on the carbonation...
366
Authors: Ho Jae Lee, Jang Hwa Lee, Do Gyeum Kim
Chapter 2: Materials Science and Engineering
Abstract:This research analyzes the microstructure of hardened blended cement pastes. Fly ash was used to replace Portland cement type I paste. Test...
350
Authors: Eisuke Nakamura, Yuki Kurihara, Hirohisa Koga
Chapter 9: Emerging Fields and Newly Developed Techniques
Abstract:An outdoor exposure test was conducted to investigate the resistances of concrete containing supplementary cementitious materials (SCMs) to...
1076