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Superabsorbent polymer structures

Title: Superabsorbent polymer structures
Author(s): W. Siriwatwechakul, J. Siramanont, W. Vichit-Vadakan
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: 253 - 262
Total Pages: 10
Nb references: 18
Language: English

Abstract: The use of superabsorbent polymers (SAP) as internal curing agents has been well documented in the literature for over a decade. Nonetheless these SAP have been poorly identified and characterized with respect to its ability to enhance concrete performance. SAP is a general term referring to polymers that are able to retain large amount water comparing to its weight. In this study, we present the characteristics of cross-linked Poly(acry lamide) prepared from two different techniques: solution polymerization and water-in-oil microemulsion polymerization. The microemulsion polymerization technique allowed us to synthesize polymer microspheres with the particle size within the range of 50-75 µm. The results showed that the microspheres reached complete hydration within 5 minutes, while the polymer prepared by solution polymerization required longer time to hydrate. In addition, in order to fine-tune the ability to absorb water, we included acrylic acid into SAP. By varying the content of acid, we were able to engineer SAP with different degrees of water absorption, ranging from 20X to 60X.

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

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