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Computers and Concrete
  Volume 19, Number 6, June 2017 , pages 667-675

Statistical models for mechanical properties of UHPC using response surface methodology
Mohammad A. Mosaberpanah and Ozgur Eren

    One of the main disadvantages of Ultra High Performance Concrete exists in the large suggested value of UHPC ingredients. The purpose of this study was to find the models mechanical properties which included a 7, 14 and 28-day compressive strength test, a 28-day splitting tensile and modulus of rupture test for Ultra High Performance Concrete, as well as, a study on the interaction and correlation of five variables that includes silica fume amount (SF), cement 42.5 amount, steel fiber amount, superplasticizer amount (SP), and w/c mechanical properties of UHPC. The response surface methodology was analyzed between the variables and responses. The relationships and mathematical models in terms of coded variables were established by ANOVA. The validity of models were checked by experimental values. The offered models are valid for mixes with the fraction proportion of fine aggregate as; 0.70-1.30 cement amount, 0.15-0.30 silica fume, 0.04-0.08 superplasticizer, 0.10-0.20 steel fiber, and 0.18-0.32 water binder ratio.
Key Words
    response surface method; ultra high performance concrete; compressive strength; splitting tensile strength; modulus of rupture; central composite method
Mohammad A. Mosaberpanah: Department of Civil Engineering, Girne American Univesity (GAU), Kyrenia, Cyprus
Ozgur Eren: Department of Civil Engineering, Eastern Mediterranean University (EMU), Famagusta, Cyprus

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