Mechanical Properties and Frost-Thaw Behavior in Road Concrete

This study aims to determine the effect of wastes on the mechanical and durability characteristics of road concrete. Steel slag was used as replacement of aggregates in different percentages. Silica fume was used as replacement of 10% of cement. The mechanical characteristics such as: flexural strength, split tensile strength and compressive strength were experimental determined and analyzed. The behavior to frost-thaw cycles of road concrete with wastes was also analyzed. The mechanical strengths presented high values in comparison with that of the control mix (without wastes) for reduced percentages of aggregate replacement. The behavior to frost-thaw cycles was better in the case of road concrete with waste in comparison with the control mix.