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首页> 外文会议>International Conference Silicate Binders >Rheological Properties of Alkali-Activated Brick Powder Based Pastes: Effect of Alkali Activator and Silicate Modulus
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Rheological Properties of Alkali-Activated Brick Powder Based Pastes: Effect of Alkali Activator and Silicate Modulus

机译：碱活化砖粉末浆料的流变性能：碱活化剂和硅酸盐模量的影响

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The rheological behaviour of alkali-activated materials prepared by activation of a brick powder by alkaline solution (alkali + water glass) is described. The influence of the composition of activation solution (NaOH vs. KOH, varied silicate modulus) on the flow properties (yield stress, consistency coefficient, fluidity index) and the evolution of the elastic modulus (G′) and the viscous modulus (G″) over time were studied. The results show that the pastes are thixotropic suspensions with very low yield stress. The potassium activator decreases the yield stress and viscosity of the pastes and retards the polymerization kinetics. The brick pastes become more rigid and more viscous with increasing silicate modulus. This also leads to an acceleration of gel formation in brick pastes.
机译：描述了通过碱性溶液（碱+水玻璃）激活砖粉末制备的碱活性物质的流变行为。活化溶液组合物（NaOH vs.KOH，不同硅酸盐模量）对流动性（屈服应力，一致性系数，流动性指数）的影响和弹性模量（G'）和粘性模量（G“的进化）随着时间的推移进行了研究。结果表明，糊状物是具有非常低的屈服应力的触变性悬浮液。钾活化剂降低浆料的屈服应力和粘度，并延缓聚合动力学。随着硅酸盐模量的增加，砖浆体变得更加刚性和更粘稠。这也导致砖糊中的凝胶形成加速。

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