Issue 66

S.E. Daguiani et alii, Frattura ed Integrità Strutturale, 66 (2023) 88-111; DOI: 10.3221/IGF-ESIS.66.05

Figure 4: Particle size distribution of studied constituents

Mixture design approach The mixture design approach is a new technique used when examining products of various components that depend on the effects of different factors and to organise better the experimental tests that support scientific research or industrial studies. It considers the impact of each factor not only separately but also with the interaction between several factors, which are the proportions of each component (X i ) of the mixture (proportions of PC, WGP, and GGBS) on the studied responses (Y), which are presented as a function of these proportions (Consistency, setting time, soundness and strength-activity index of the cement sample). Indeed, it allows for a remarkable reduction in the number of experiments and the planning and execution of the research. Using this method will be very interesting for studying the following function type :  ( ) i Y f X (1)

% of PC

30 % partial replacement of prtland cement

70% of portland cement

% of WGP

% of GGBS

Figure 5: Substitution of cement by mineral additions

The purpose of the present work is to examine the effect of WGP and GGBS on the consistency, initial and final setting time, soundness, and strength-activity index of the cement sample using a mixture design with 03 factors (PC, WGP, and

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