Experimental study on the rheological properties of concrete slurry based on water film thickness theory
Through 15 groups of measurement experiments controlling different slurry-bone ratios and water-binder ratios,the rheological properties of the mixtures were tested using an ICAR rheometer.The improved Bingham model was utilized to fit the rheological parameters,while the variation mechanism of the water film thickness on the particle surface in the slurry was investigated.The results show that with the increase in the water binder ratio,the shear-thickening behavior of the slurry transforms into shear-thinning behavior,indicating the existence of a critical water-to-cement ratio of 0.42.The yield stress and plastic viscosity of the slurry decrease as the water binder ratio increases,with a diminishing decrease rate.The variation of the water film thickness on the surface of the slurry particles is directly proportional to the slurry-bone ratio and water binder ratio.A fitted function of the water film thickness with yield stress and plastic viscosity has been derived.There exists a high correlation between the rheological parameters and the water film thickness.These research findings provide a foundation for the study of the rheological properties of concrete slurry.
rheological propertieswater-binder ratioslurry-bone ratiowater film thickness
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维普
