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The simplex-centroid design with upper and lower bounds of component proportions was adopted to study the compressive strengths of mortars made with ternary blends of cement, ground granulated blast-fumace slag, and fly ash in this paper. Based on the results of a minimum of seven design points, three special cubic polynomial models were used to establish the strength-predicting equations at different ages for the mortars. Five experimental checkpoints were also designed to verify the precision of the equations. With few exceptions, the errors of the predicted values were within 10 %, and most were within 5 %. At last, the ternary diagrams of compressive strengths at different ages were also drawn, and the compressive strengths could also be predicted from the iso-strength contour lines on them. The paper provides a rational way for determining the optimal proportions of two mineral admixtures when they are used in concrete.
The simplex-centroid design with upper and lower bounds of component proportions was adopted to study the compressive strengths of mortars made with ternary blends of cement, ground granulated blast-fumace slag, and fly ash in this paper. Based on the results of a minimum of seven design points, three special cubic polynomial models were used to establish the strength-predicting equations at different ages for the mortars. Five experimental checkpoints were also designed to verify the precision of the equations. With few exceptions, the errors of the predicted values were within 10 %, and most were within 5 %. At last, the ternary diagrams of compressive strengths at different ages were also drawn, and the compressive strengths could also be predicted from the iso-strength contour lines on them. The paper provides a rational way for determining the optimal proportions of two mineral admixtures when they are used in concrete.
On predicting compressive strengths of mortars with ternary blends of cement, GGBFS and fly ash
Modell zur Berechnung der Druckfestigkeit von Mörteln aus ternären Mischungen von Zement, Flugasche und gemahlener granulierter Hochofenschlacke
Cement and Concrete Research ; 27 ; 487-493
1997
7 Seiten, 4 Bilder, 5 Tabellen, 9 Quellen
Article (Journal)
English
On Predicting Compressive Strengths of Mortars with Ternary Blends of Cement, GGBFS and Fly Ash
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