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Investigation of Plasticizing and Slump Retaining Properties of
PEG-Based Tri-Block Copolymers in Cementitious Systems
,
M.Sc. Thesis
Sharif University of Technology
;
Pourjavadi, Ali
(Supervisor)
Abstract
Plasticizers in cementitious systems are additives that upon addition at a low dosage can change the workability, mechanical strength and other properties of cement paste effectively. In this study, tri-block copolymers based on poly ethylene glycol (PEG) was synthesised and their applications in the cementitious systems investigated. The main purpose is the verification of plasticizing effects of these copolymers in the cement paste. ABA tri-block copolymers with PEG (1000 and 1500 g/mol) as B block, poly caprolactone, poly caprolactam, poly lactide and poly glycolide (with different weight ratio) as A block were synthesised via ring opening polymerization with stannous octanoate as...