Synthesize research on high-performance polycarboxylate superplasticizer for the subway shield tunnel segment concrete
LIN Yanmei
Abstract：High-performance polycarboxylate superplasticizer for the subway shield tunnel segment concrete was synthesized with acrylic acid,Polyoxyethylene(HPEG),and acryloyl oxyethyl trimethyl ammonium chloride(DAC). It was synthesized by free rad-ical solution polymerization. The effect of different molecular mass macromonomer,acid/ether mole ratio,and DAC dosage on the properties of superplasticizer was resarched. The results showed that when HPEG molecular weight was 4000,acid/ether mole ratio was 3.0/1.0,DAC dosage was 1.3% of HPEG,synthetic polycarboxylate was applied to the subway shield tunnel segment concrete, which had advantages of short initial setting time,good thixotropy,good cohesiveness,high strength and so on.
Keywords：polycarboxylate superplasticizerthe subway shield tunnel segmentearly strengthinitial setting timesynthesis
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 33-36 )