Polycarboxylate Polymer Modified Cement Grout and Grouted Sand Behavior-PPT Presentation

PPT Presentation

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The study examines how polycarboxylate ether (PCE) polymer affects cement grouts and the behavior of grouted sand, with applications such as foundations and retaining walls. It addresses grout failures and emphasizes the importance of rheology, water-to-cement ratio, curing conditions, additives, and contamination.<br /><br />Researchers added PCE at 0.16% of cement’s dry weight. They evaluated grout viscosity and yield stress under different water-to-cement ratios and temperatures, then tested the compressive strength and stress–strain behavior of grouted sand.<br /><br />Adding PCE increased apparent and plastic viscosity by 32% and 367%, respectively, with effects depending on water-to-cement ratio and temperature. Polymer-modified grout also raised grouted-sand compressive strength by 290%–360%, depending on water-to-cement ratio and curing time. The authors attribute this improvement to better cement-particle dispersion and bonding, which increased the density of the grouted sand.<br /><br />Finally, the Vipulanandan p–q model predicted grouted sand’s compressive stress–strain behavior more effectively than the Wang model.

Keywords

polycarboxylate ether

cement grout

grouted sand

rheology

viscosity

yield stress

compressive strength

water-to-cement ratio

stress-strain behavior

Vipulanandan p-q model