Investigation of the mechanical properties of waste tin additive concrete produced by recycling aggregates

In this study, the concretes which have the biggest share in the building components, after the end of its service life, it is aimed to be reused at maximum level in concrete production by being recovered. In this experimental study, which investigated the usability of recycling aggregates in concrete production, natural aggregates and recycling aggregates Concrete series are produced by using 100% natural aggregate, 100% recycled fine aggregate, 100% recycled Coarse aggregate and 100% recycle aggregates. In order to improve the physical and mechanical properties of the concrete, 1,2% hyper plasticizer and 10% silica fume were added to the concrete mixtures produced. Physical and mechanical tests were performed on the concrete samples on the 7th, 28th and 90th days. The water/cement ratio of the produced concrete mixtures was selected 0.50 and the target strength as C30/37. Unit weight, specific gravity, water absorption rate, granulometry, and Los Angeles abrasion tests of aggregates prepared before concrete production, the slump in fresh concrete, density determination, compressive strength, and pull-out experiments were investigated in hardened concrete. Also in this study, waste tin packages were mixed with concrete and the effect of concrete on mechanical properties was investigated. Waste tin packages were used as length/width l∕w = 70 mm/5 mm and ratio of 40 kg∕m3. At the end of the study, the desired strength was achieved in most of the series produced. However, water absorption rates of the recycling aggregates are much higher since have higher porosity than natural aggregates. Therefore, firstly the processability, then the compressive and adherence strengths were decreased compared to the concretes produced using natural aggregates. The use of waste cans has reduced the compressive strength in all series. It contributed in terms of adherence strength. As a result, it is thought that before the recycling aggregates can be used in concrete production, it should be improved by eliminating the cement mortar by mechanical methods and more researches should be done on this subject.