Preparation of water dispersible polyisocyanate and performance evaluation of in-situ toughening concrete

Title: Preparation of water dispersible polyisocyanate and performance evaluation of in-situ toughening concrete
Author(s): Bei Ding, Changwen Miao, Wenrui Tang, Dongliang Zhou
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: 1 - 10
Total Pages: 10
Nb references: 19
Language: English

Abstract: Water dispersible polyisocyanate was synthesized by poly functional isocyanates (f>2) and hydroxyl containing co-reactants. The influence of water dispersible polyisocyanate on workability and mechanical performance of concrete were studied experimentally. The results show that fracture energy ratios of concrete with polyisocyanate polymer has been greatly improved by approx. 60%. The structure of polyisocyanate polymer and C-S-H composites was studied by XRD analysis. The results show some clear sighs for intercalation of the macromolecules were observed. The improvement of C-S-H by polyisocyanate molecules on nano-scale results in the increase of concrete toughness.

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