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首页> 外文期刊>Fluid mechanics research >Effect of Additive on the Rheological Characteristics of Slurries of Fly Ash and Bottom Ash Mixture at High Concentrations
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Effect of Additive on the Rheological Characteristics of Slurries of Fly Ash and Bottom Ash Mixture at High Concentrations

机译：添加剂对高浓度粉煤灰与底灰混合料流变特性的影响

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摘要

Present study reports the rheological characteristics of slurries of mixture of fly ash and bottom ash slurry at high concentrations (above C_w ≈ 60% by weight) with and without additive. The ratio of fly ash and bottom ash is kept at 4:1. Mixture of Sodium Carbonate and Henko detergent has been used as the additive. Rheological tests on slurries (with and without additive) were carried out in a Weissenberg Rheogoniometer with concentric cylinder platens. The variation of shear stress τ with shear rate γ shows that the mixture of fly ash and bottom ash slurries above a solid concentration of 40% by weight show non-Newtonian behavior and that the experimental data fits a simple Bingham plastic model. Addition of additive results in a significant decrease in the yield stress and Bingham viscosity at all concentrations tested.
机译：本研究报告了在有和没有添加剂的情况下，高浓度（C_w≈60％重量以上）的粉煤灰和底灰浆混合物的浆体的流变特性。飞灰与底灰的比例保持在4：1。碳酸钠和汉科洗涤剂的混合物已用作添加剂。在具有同心圆柱压板的Weissenberg流变仪中对浆液（含和不含添加剂）进行流变学测试。剪切应力τ随剪切速率γ的变化表明，固体含量超过40％（重量）的粉煤灰和底灰浆料的混合物表现出非牛顿性，并且实验数据符合简单的宾厄姆塑性模型。在所有测试浓度下，添加剂的添加都会导致屈服应力和宾汉粘度的显着降低。

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