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Effects of limestone filler fineness on the rheological behavior of cement – Limestone filler grouts
Ain Shams Engineering Journal ( IF 6 ) Pub Date : 2021-05-03 , DOI: 10.1016/j.asej.2021.03.020
Omrane Benjeddou , Mamdooh Alwetaishi , Morched Tounsi , Rayed Alyousef , Hisham Alabduljabbar

An acceptable viscosity and an easy penetrability of cement - limestone filler grout in the granular matrix of self compacting concrete are an important factors that affecting both its rheological and its hardened properties. This experimental and theoretical work consists to study the effect of limestone filler fineness on the rheological behavior of cement - limestone filler grout. In the first part, five different grouts were prepared by varying the Blaine Specific Surface (BSS) of the limestone filler, 3060, 4750, 6320, 7680 and 9440 cm2/g, respectively. A large number of properties relating to the rheology and the stability are carried out on the five grouts such as grain dispersion, density, volume concentration of solid, dynamic viscosity and Marsh funnel flow. The second part consists to develop a theoretical model to predict the different rheological properties of the grout as function of limestone filler BSS. The results show that the rheological properties of cement-limestone filler grout such as the dispersion percentage, the intergranular distance and the flow time are strongly affected by the limestone fillers fineness. In addition, the experimental and the predicted results present a good agreement.



中文翻译:

石灰石填料细度对水泥流变行为的影响——石灰石填料灌浆

在自密实混凝土的粒状基质中水泥-石灰石填料灌浆的可接受的粘度和易渗透性是影响其流变性能和硬化性能的重要因素。这项实验和理论工作包括研究石灰石填料细度对水泥-石灰石填料灌浆流变行为的影响。在第一部分中,通过改变石灰石填料的布莱恩比表面积 (BSS),3060、4750、6320、7680 和 9440 cm 2制备了五种不同的灌浆/g,分别。大量与流变学和稳定性相关的特性是在五种水泥浆上进行的,例如颗粒分散性、密度、固体体积浓度、动态粘度和马什漏斗流。第二部分包括开发一个理论模型来预测作为石灰石填料 BSS 函数的灌浆的不同流变特性。结果表明,石灰石填料细度对水泥-石灰石填料灌浆的流变特性如分散率、粒间距离和流动时间有很大影响。此外,实验结果和预测结果具有良好的一致性。

更新日期:2021-05-03
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