Atık nano karbon karası kullanılarak üretilen betonlarda yüksek sıcaklık etkisinin incelenmesi

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Thesis Type: Postgraduate

Institution Of The Thesis: Ataturk University, Fen Bilimleri Enstitüsü, İnşaat Mühendisliği Anabilim Dalı, Turkey

Approval Date: 2020

Thesis Language: Turkish

Student: HAKAN BEKAR

Supervisor: Arif Emre Sağsöz

Open Archive Collection: AVESIS Open Access Collection

Abstract:

Nano carbon black is obtained as a result of pyrolysis process in the recycling of waste tires that have completed their life. This master thesis has been prepared to investigate the disposal of this waste and its use in concrete. The behavior of concrete under the influence of fire, which is considered one of the major disasters of today, and the high temperature it has created, has also been studied experimentally within the scope of the thesis. In this context, concrete samples were produced at a dosage of 365 kg/m3using 0%, 4% and 8% waste nano carbon black instead of cement. After the samples were cured for 28 days, the samples were exposed to ambient (laboratory) temperature, 200oC, 400oC, 500oC and 700oC high temperature applications. Weight losses and compressive strengths of all samples were determined experimentally. In addition, SEM images of the samples were taken in order to examine how the internal structure of concrete changed under the influence of waste nano carbon black and high temperature. Waste nano carbon black additive caused a 20% reduction in the compressive strength of concrete. It has been determined that the high temperature effect and the concrete strength of all concrete samples with and without waste nano carbon black significantly decrease the compressive strength. The drop rate is higher in samples containing waste nano carbon black. Ambient temperature, 200oC, 400oC and 500oC temperature applied samples have compressive strengths at values higher than the carrier concrete strength of 30 MPa. The compressive strength of all samples applied at 700oC was less than 30 MPa and the carrier remained below the concrete strength limit. As a result of the experimental studies, it could be said that waste nano carbon black can be safely used instead of cement.