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Application of Interparticle Spacing Model to Maximize Filler Content in Cementitious Pastes...

Publication Type
Conference Paper
Book Title
Proceedings of the 16th International Congress on the Chemistry of Cement (ICCC 2023) - Volume I. September 18-22, 2023, Bangkok, Thailand.
Publication Date
Page Numbers
475 to 460
Conference Name
16th International Congress on the Chemistry of Cement 2023
Conference Location
Bangkok, Thailand, Thailand
Conference Sponsor
Multiple sponsors
Conference Date

One of the most impactful ways to reduce embodied carbon of concrete in the near term is by partially replacing Portland cement with supplementary cementitious materials and/or fillers. This article describes an approach to reduce cement content in concrete through the development of high filler, low water (HFLW) cementitious pastes. Pastes with cement content as low as 50% (% weight of fines) were designed by applying models that maximize the packing density of the granular system and that consider the characteristics of the materials to calculate interparticle spacing (IPS), thereby allowing to obtain pastes with higher solids concentration and lower water demand. Strong correlations were found between IPS, the consistency index of the Herschel-Bulkley rheological model, and cement hydration kinetic parameters of binary and ternary pastes containing a Portland limestone cement and up to two different types of ground limestone. The approach showed to be feasible for the design of HFLW concrete paste fraction.