Synthesis for an Amide-Ester Type Polycarboxylate Superplasticizer and its Application in Concrete

Abstract:

A new type of amide-modified polycarboxylate superplasticizer was synthesized by a two-step method: Firstly, a mixture of amidated and esterified products reacted by maleic anhydride and 2-aminoethanol was modified through Mannich reaction. Then, the modified product was reacted with Prenyl alcohol polyethenoxy ether (TPEG), acrylic acid and other monomers to obtain an amide-structured polycarboxylate superplasticizer. The molecular weight and molecular weight distribution were measured by Gel permeation chromatography (GPC). Lastly, the optimum AA to modified product ratio, initiator dosage and reaction time were determined by cement mortar test. The concrete application performance showed that the synthesized superplasticizer could improve the fluidity of the concrete and maintain the slump loss as well. The introduction of modified PCE has no harm for the concrete strength.

• Periodical: Advanced Materials Research (Volumes 989-994)
• Pages: 233-237
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.989-994.233
• Online since: July 2014
• Authors: Chong Sun*, Guang Jun Zheng, Yao Bi, Hui Zhou
• Keywords: Amidation, Esterification, Mannich Reaction, Modification, Superplasticizer, Synthesize

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