Can Demirel

Using Waste Concretes as Recycling Aggregate in Concrete Production and Sustainability

Protecting natural sources is an important responsibility for the whole world. Concrete is the most widespread construction material, as a result of its production, natural sources are running out, and also natural environment is being disturbed. In addition, building wastes brought about by the renovation activities for the structures that have expired. In order to maintain the ecological balance, using the available sources wisely and efficiently is crucial. In this study, known class and age of waste concrete is used as coarse and fine aggregates as production of concrete. There are two types of aggregates are used in concrete production as 0–4 and 4–22.4 sizes. These aggregates groups are replaced with normal aggregates as 0, 10, 20, 30, 40, 50 and 100% ratios in concrete. Compressive strength of concrete specimens are determined as 28 and 90 days coring regime. According to the experimental results, it has been seen that recycled aggregates may be used in concrete production and that they may shed light in the production of sustainable concrete.

The Proposal of Restoration of Historical Kastamonu Castle’s

Permanence of Kastamonu Castle in Turkey which has been the witness of history emerges as the most important value. Historical places and structures are important expressions of community’s culture and identity. The structure can be provided to serve from the past to the future. In this study; characteristical features of Historical Kastamonu Castle, used materials and reasons of structural deterioration are analyzed for restoration suggestion. Historical Kastamonu Castle is important for long-lasting regional culture properties.