Residual Capability of Alkali Binding by Hydrated Pozzolanic Cements in Long-Service Concrete Structures
Joint Authors
Berra, Mario
Mangialardi, Teresa
Paolini, Antonio Evangelista
Source
Advances in Materials Science and Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-06-04
Country of Publication
Egypt
No. of Pages
9
Abstract EN
An experimental procedure was developed and applied to cement pastes made with two different pozzolanic cements (CEM IV/B (P) and CEM IV/B (V)) in order to ascertain the existence of a residual capability of alkali binding by long-term hydrated pozzolanic cements and, at the same time, to evaluate the alkali retention capability and the concentration of OH− ions in the pore solution of such cementitious matrices.
The developed procedure consisted of accelerated curing of cement paste specimens (150 days at 60°C and 100% RH), subsequent leaching tests at 60°C for 30 days by using deionized water or basic solutions (NaOH or KOH at different concentrations) as leaching media, and correlation of the leaching test results with a simple mass balance equation for sodium and potassium ions.
The developed procedure was found to be appropriate for evaluating both the pore liquid alkalinity and the alkali retention capability by long-term hydrated pozzolanic cement pastes.
A residual capability of alkali binding was also identified for both tested pozzolanic cements, thus indicating their potential ability to prevent (CEM IV/B (V)) or minimize (CEM IV/B (P)) the risk of deleterious expansion associated with alkali-aggregate reaction in long-service concrete structures, like concrete dams.
American Psychological Association (APA)
Berra, Mario& Mangialardi, Teresa& Paolini, Antonio Evangelista. 2018. Residual Capability of Alkali Binding by Hydrated Pozzolanic Cements in Long-Service Concrete Structures. Advances in Materials Science and Engineering،Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1120855
Modern Language Association (MLA)
Berra, Mario…[et al.]. Residual Capability of Alkali Binding by Hydrated Pozzolanic Cements in Long-Service Concrete Structures. Advances in Materials Science and Engineering No. 2018 (2018), pp.1-9.
https://search.emarefa.net/detail/BIM-1120855
American Medical Association (AMA)
Berra, Mario& Mangialardi, Teresa& Paolini, Antonio Evangelista. Residual Capability of Alkali Binding by Hydrated Pozzolanic Cements in Long-Service Concrete Structures. Advances in Materials Science and Engineering. 2018. Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1120855
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1120855