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Optimizing Low Cement Concrete with Modeling of Aggregates Packing Degree and PSD

This study focuses on optimizing low cement concrete by examining aggregates packing degree and particle size distribution (PSD). The research delves into how real-packing occurs in concrete and how to model it effectively. Understanding the relationship between packing, PSD, and mechanical performance is crucial. Practical models for realizing the packing degree and achieving optimal blends are explored. The research presents a practical optimal PSD modeling approach using 3D and 2D verification strategies. Additionally, the study highlights the impact of loose packing density on concrete's compressive strength. By modeling the packing degree effectively, the need for extensive testing can be minimized.

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Optimizing Low Cement Concrete with Modeling of Aggregates Packing Degree and PSD

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  1. Modeling of Aggregates Packing Degree and PSD for Optimizing Low Cement Concrete M.RezaMoini Advisors: Konstantin Sobolev, Ismael Flores-Vivian PCA What Grading (PSD) is optimal? How the Real-Packing occurs in concrete? How can we Model real Packing? How packing is related to PSD and Mechanical Performance? PCA

  2. PSD is a factor of spacing. Practical models need to realize the packing degree. For any blends, the ideal curve can be attempted. Optimal Blends! How to achieve a Model? Practical Optimal PSD Modeling Optimal PSD (3D) Ideal PSD Fuller-Thomson curves Southern Wisc. Agg. Virtual 3D Spheres Modeling Optimal PSD (2D-verification) • 86% packing, 500 disks,n=10, =1.005, = 10, S = 1.025 • 5M-10M spheres model can replace/minimize the PSD testing attempts

  3. Mechanical performance is a function of Loose Packing= real agg. packing is concrete is loose. The LPD directly contributes to the C.S. of concrete and it should be considered for minimizing the void content or cement paste. Model minimize the need for Packing degree testing What does Packing degree do? 3D Visualization Modeled P.D. (Compacted) Experimental P.D. (Compacted ) Collusion:

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