title: Statistical analysis of the effective factors on the 28 days compressive strength and setting time of the concrete.
abstract: In this study, the effects of various factors (weight fraction of the SiO2, Al2O3, Fe2O3, Na2O, K2O, CaO, MgO, Cl, SO3, and the Blaine of the cement particles) on the concrete compressive strength and also initial setting time have been investigated. Compressive strength and setting time tests have been carried out based on DIN standards in this study. Interactions of these factors have been obtained by the use of analysis of variance and regression equations of these factors have been obtained to predict the concrete compressive strength and initial setting time. Also, simple and applicable formulas with less than 6% absolute mean error have been developed using the genetic algorithm to predict these parameters. Finally, the effect of each factor has been investigated when other factors are in their low or high level.
authors.affiliation: Department of Chemical Engineering, Shahid Bahonar University of Kerman, Kerman 76175, Iran.
authors.forename: Bahador
authors.initials: B
authors.lastname: Abolpour
authors.affiliation: Department of Chemical Engineering, Shahid Bahonar University of Kerman, Kerman 76175, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Mehdi Afsahi
authors.affiliation: Kerman Momtazan Cement Company, 32nd Kerman-Rafsanjan Highway, Kerman, Iran.
authors.forename: Saeed Gharib
authors.initials: SG
authors.lastname: Hosseini
keywords: Analysis of variance; Blaine; Composition of initial materials; Concrete compressive strength; Genetic algorithm; Initial setting time