Efficiency of granulated blast furnace slag replacement of cement according to the equivalent binder concept |
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| Authors: | Bougara Abdelkader Kadri El-Hadj Ezziane Karim |
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| Affiliation: | 1. Laboratory Sciences of Materials and Environment, Chlef University, Chlef, Algeria;2. Laboratory L2MGC, University of Cergy Pontoise, F9500 Cergy Pontoise, France;1. Department of Mechanical Engineering, Batman University, 72060 Batman, Turkey;2. Department of Mechanical Engineering, University of Gaziantep, 27310 Gaziantep, Turkey;1. Laboratory of Structures, Geotechnics and Risks, University Hassiba Benbouali of Chlef, Algeria;2. Department of Civil and Structural Engineering, University of Sheffield, UK;3. Milestone and Associates Ltd, New Zealand;1. Cerema, Project-team DIMA, 120 rue de Paris, BP 216 Sourdun, 77487 Provins Cedex, France;2. UBL, Université de Nantes, GeM, CNRS UMR 6183, 58 rue Michel Ange (BP 420), 44606 Saint Nazaire Cedex, France;1. Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Concrete and Construction Chemistry, Überlandstrasse 129, 8600 Dübendorf, Switzerland;2. HeidelbergCement Technology Center GmbH, Rohrbacher Strasse 95, 69181 Leimen, Germany |
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| Abstract: | The strength development of slag cement has a great consideration for the scheduling of formwork removal, prestressing operations, and other practical aspects of slag cement usage. The prediction of slag concrete strength, using the Feret’s model has been studied by introducing the concept of the equivalent binder. This has led to define an efficiency coefficient of slag which distinguishes the latter with the regard to the cement. Thus, this obtained coefficient characterizes well the slag and lets to predict the slag concrete strength from strength values of a normal concrete made without slag for a given age and replacement rate. At 90 days age, the test results show that for 15% replacement rate, the slag is activated completely and gives 67% of efficiency more than the cement. For higher replacement rate, the efficiency of the slag decreases and becomes similar to that of cement for 50% replacement rate. |
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