A Study of the Impact Resistance of Rubber Concrete at Low Temperatures (230°C)

Abstract

Inthepresentstudy,theimpactresistanceofrubberconcreteatlowtemperatures(−30°C)wasexamined.Theinitialandultimate crackimpacttimesandtheductilityindexeswereevaluated.Thisstudy’sspecimenswerepreparedbyaddingtwodifferentsizesof rubber particles (20mesh and 50mesh) in different ratios (0%, 5%, 10%, 15%, and 20%) at both 25°C and−30°C. The concrete specimenswereevaluatedusingadrophammerweighttestmethod.Theresultsshowedthattheinitialandultimatecrackimpact times and ductility indexes of the rubber concrete specimens had decreased at−30°C. Also, the decrease amplitudes were determined to be lower than those of the reference concrete specimens. Consideration was given in this study to the large variations in theimpact values, and a two-parameterWeibull distribution method wasadopted inorder toanalyze theobtained experimentaldata.Theresultshaddemonstratedthattheimpacttimesoftherubberconcretespecimenscouldbedescribedusing the two-parameter Weibull distribution method results.