Review of Carbonation Resistance in Hydrated Cement Based Materials
Joint Authors
Wachira, Jackson Muthengia
Thiong’o, Joseph Karanja
Marangu, Joseph Mwiti
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-01-01
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
Blended cements are preferred to Ordinary Portland Cement (OPC) in construction industry due to costs and technological and environmental benefits associated with them.
Prevalence of significant quantities of carbon dioxide (CO2) in the atmosphere due to increased industrial emission is deleterious to hydrated cement materials due to carbonation.
Recent research has shown that blended cements are more susceptible to degradation due to carbonation than OPC.
The ingress of CO2 within the porous mortar matrix is a diffusion controlled process.
Subsequent chemical reaction between CO2 and cement hydration products (mostly calcium hydroxide [CH] and calcium silicate hydrate [CSH]) results in degradation of cement based materials.
CH offers the buffering capacity against carbonation in hydrated cements.
Partial substitution of OPC with pozzolanic materials however decreases the amount of CH in hydrated blended cements.
Therefore, low amounts of CH in hydrated blended cements make them more susceptible to degradation as a result of carbonation compared to OPC.
The magnitude of carbonation affects the service life of cement based structures significantly.
It is therefore apparent that sufficient attention is given to carbonation process in order to ensure resilient cementitious structures.
In this paper, an indepth review of the recent advances on carbonation process, factors affecting carbonation resistance, and the effects of carbonation on hardened cement materials have been discussed.
In conclusion, carbonation process is influenced by internal and external factors, and it has also been found to have both beneficial and deleterious effects on hardened cement matrix.
American Psychological Association (APA)
Marangu, Joseph Mwiti& Thiong’o, Joseph Karanja& Wachira, Jackson Muthengia. 2019. Review of Carbonation Resistance in Hydrated Cement Based Materials. Journal of Chemistry،Vol. 2019, no. 2019, pp.1-6.
https://search.emarefa.net/detail/BIM-1171864
Modern Language Association (MLA)
Marangu, Joseph Mwiti…[et al.]. Review of Carbonation Resistance in Hydrated Cement Based Materials. Journal of Chemistry No. 2019 (2019), pp.1-6.
https://search.emarefa.net/detail/BIM-1171864
American Medical Association (AMA)
Marangu, Joseph Mwiti& Thiong’o, Joseph Karanja& Wachira, Jackson Muthengia. Review of Carbonation Resistance in Hydrated Cement Based Materials. Journal of Chemistry. 2019. Vol. 2019, no. 2019, pp.1-6.
https://search.emarefa.net/detail/BIM-1171864
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1171864