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The impact of SAP structure on the effectiveness of internal curing



Title: The impact of SAP structure on the effectiveness of internal curing
Author(s): J. Siramanont, W Vichit-Vadakan, W. Siriwatwechakul
Paper category : conference
Book title: International RILEM Conference on Use of Superabsorbent Polymers and Other New Additives in Concrete
Editor(s): O.M. Jensen, M.T. Hasholt and S. Laustsen
Print-ISBN: 978-2-35158-104-9
e-ISBN: 978-2-35158-105-6
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 243 - 252
Total Pages: 10
Nb references: 9
Language: English


Abstract: Although the use of superabsorbent polymers (SAP) as internal curing agents has been well documented in the literature for over a decade, there has been limited commercial production due to economic and practical limitations associated with the implementation process. The use of SAP’s as internal curing agents has significant technical and commercial value over other internal curing techniques, such as the use of porous aggregates. However, it is crucial to understand the SAP structure in order to understand how it impacts internal curing mechanisms. The effectiveness of internal curing is based on the swelling ratio of the SAP, the rate in which the SAP absorbs and releases water, and the inter-particle spacing of the SAP. The water absorption capacity and the rate of absorption and release are heavily related to the structure and the polymerization technique of the SAP. Results of strength, an indicator of the effectiveness of internal curing, demonstrate that there is an optimal SAP structure for internal curing. Microstructural evaluations substantiate the observed performance. This basis in understanding has led to the commercialization of a cement with internal curing capabilities with clear large scale production and implementation results.


Online publication: 2010-10-04
Publication type : full_text
Public price (Euros): 0.00