Abstract:

Since aggregates constitute the majority of the concrete volume, the use of waste aggregates is preferred to reduce natural aggregate consumption, contribute to waste disposal and reduce costs. The most important property expected from concrete is compressive strength. However, in this study, Recycle Asphalt Pavement (RAP) and Glass Fiber (GF) were used to improve the tensile strength of concrete as well as compressive strength. For the experimental study, RAP was replaced with 0-4 mm crushed sand at 0% (REF), 30%, 60% and 90% by weight, and GF with 6 mm length was included in the mixture in the amount of 0.5, 1 and 1.5 kg/m3 by weight has been done. CEM I 42.5 R type cement was used as binder, and crushed sand (0-4 mm) and crushed stone (4-12 mm) aggregate were used as aggregate. The water/cement ratio was waited constant at 0.4. Concrete samples were produced in dimensions of 15x15x15, 10x10x10 and 7.1x7.1x7.1 cm. After the samples produced were waited in the standard curing pool for 7 and 28 days, the experiments were carried out. In the scope of the study, Slump test, compressive strength, splitting tensile strength, unit volume weight, water absorption, porosity and Böhme (abrasion) experiments were performed on the samples. As a result of the experiments, the highest compressive strength was measured in the REF sample and the lowest strength was measured in the KAA90-CE1.5 sample in 28-day samples. As a result of the study, the ideal WAA replacement rate was determined as 30% and the most ideal CE usage amount was determined as 1.0 kg/m3.

Keywords: