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SCC with low Portland cement-content

Mix design for use in structural applications


The use of supplementary cementitious materials (SCMs) is becoming increasingly popular for the production of sustainable concrete. However, in practice, replacement levels rarely exceed 50% and are often much lower, around 15%, with an emphasis on optimizing mechanical performance rather than material sustainability. In this research, 20, 40, 60, 80 and 100% of Portland cement (by weight) are replaced by SCMs. Four SCMs (two slags and two fly ashes) that are locally available in the Pacific Northwest of the United States are evaluated. Efficiency factors are used to describe the effect of the SCM replacement. Design expressions are developed for the four SCMs that allow for the optimization of material sustainability by maximizing SCM content based on a target compressive strength. Good agreement is seen between experimental and measured values, indicating the validity of the approach.

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CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

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