A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Accelerated carbonation testing of alkali-activated slag/metakaolin blended concretes: effect of exposure conditions
Abstract This paper addresses the effects of relative humidity (RH) and carbon dioxide ($ CO_{2} $) concentration on the rate and effects of accelerated carbonation in alkali-activated slag/metakaolin (MK) concretes. Strength and water absorption are used alongside phenolphthalein measurements to monitor carbonation, and the effects of drying at different RHs are particularly significant in controlling carbonation rates. Different trends in the carbonation rate as a function of MK content are observed when varying the $ CO_{2} $ concentration, further revealing that the carbonation rates of these materials under accelerated conditions are influenced strongly by the testing protocol. The standard phenolphthalein method for testing carbonation depth appears only to be capturing the change in alkalinity with pore solution carbonation, meaning that it does not correlate well with other performance parameters at high $ CO_{2} $ concentrations.
Accelerated carbonation testing of alkali-activated slag/metakaolin blended concretes: effect of exposure conditions
Abstract This paper addresses the effects of relative humidity (RH) and carbon dioxide ($ CO_{2} $) concentration on the rate and effects of accelerated carbonation in alkali-activated slag/metakaolin (MK) concretes. Strength and water absorption are used alongside phenolphthalein measurements to monitor carbonation, and the effects of drying at different RHs are particularly significant in controlling carbonation rates. Different trends in the carbonation rate as a function of MK content are observed when varying the $ CO_{2} $ concentration, further revealing that the carbonation rates of these materials under accelerated conditions are influenced strongly by the testing protocol. The standard phenolphthalein method for testing carbonation depth appears only to be capturing the change in alkalinity with pore solution carbonation, meaning that it does not correlate well with other performance parameters at high $ CO_{2} $ concentrations.
Accelerated carbonation testing of alkali-activated slag/metakaolin blended concretes: effect of exposure conditions
Bernal, Susan A. (author) / Provis, John L. (author) / Mejía de Gutiérrez, Ruby (author) / van Deventer, Jannie S. J. (author)
2014
Article (Journal)
English
| British Library Online Contents | 2015
Natural carbonation of aged alkali-activated slag concretes
| Online Contents | 2013