Effect of Side-Chain Structure of Polycarboxylic Acid Type Water-Reducer on Hydration of C₃A

Abstract:

Several polycarboxylate superplasticizers (PCs) with different side-chain structure have been synthesized. The effect of side-chain structure of PCs on hydration of C₃A has been investigated by XRD, TG-DSC and SEM. The results show that PCs restrain hydration of C₃A as a whole, but accelerate formation of Al(OH)₃ and C₃AH₆; with increase molecular weight of long-side-chain, hydration of C₃A is slowed, and the formation of Al (OH)₃ and C₂AH₈ also become slowed. With increase proportion of long-side-chain, hydration of C₃A and formation of C₃AH₆ are slowed, but existence of C₂AH₈ become obvious. The six-party flake hydrated products of C₃AH₆ are formed with a large number of grafted carboxyl.

• Periodical: Advanced Materials Research (Volumes 550-553)
• Pages: 807-812
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.550-553.807
• Online since: July 2012
• Authors: Yan Chao Zhu, Bao Guo Ma, Hong Bo Tan
• Keywords: C₃A, Hydrated Products, Long-Side-Chain, Polycarboxylate Superplasticizer (PCE), Structure of Side-Chain

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