Understanding the Properties of Cement Mortar with Employment of Stone Dust considering Particle Size Distribution
입도분포를 고려한 석분 사용에 따른 시멘트 모르타르 성질의 변화 이해

Su-Tae Kang
2017 Journal of the Korea Academia-Industrial cooperation Society  
This study investigates the properties of a high-performance cementitious composite with partial substitution of stone dust for fine aggregate. The relationship between the properties and particle size distribution was analyzed using several analytical models. Experiments were carried out to examine the flowability, rheology, and strength of cement mortars with different stone-dust replacement ratios of 0-30 wt.%. The results showed improved flowability, lower rheological parameters (yield
more » ... ameters (yield stress and plastic viscosity), and improved strength as the amount of stone dust increased. These results are closely related to the packing density of the solid particles in the mortar. The effect was therefore estimated by introducing an optimum particle size distribution (PSD) model for maximum packing density. The PSD with a higher amount of stone dust was closer to the optimum PSD, and the optimization was quantified using RMSE. The improvement in the PSD by the stone dust was proven to affect the flowability, strength, and plastic viscosity based on several relevant analytical models. The reduction in yield stress is related to the increase of the average particle diameter when using stone dust.
doi:10.5762/kais.2017.18.1.715 fatcat:jp3ucgut2vhojlyn6cmuoccmqm