Akademik Veri Yönetim Sistemi
Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Fen Edebiyat Fakültesi, İstatistik Bölümü, Türkiye
Tezin Onay Tarihi: 2017
Öğrenci: NAZLI İPEK KUL GÜL
Eş Danışman: AYŞEN AKKAYA, İSMAİL ÖZGÜR YAMAN
Özet:Cement, a hydraulic binder material, is the most important of building materials. The compressive strength test method is used to determine the quality of cement. The cement manufacturers are obliged to carry the CE Marking in accordance with the EN 197 standards for cement production in Europe and Turkey and in accordance with the Building Materials Regulation (CPR). Within the scope of CE Marking, the product certification body performs sampling from the factory in specified periods. The samples obtained are subject to simultaneous experimentation by both the manufacturers and the accredited laboratories of the certification bodies. The difference between the compressive strength test results obtained in this frame must be less than 4 MPa for all produced cement types and strength classes within the scope of the statistical conformity assessment including the 12 month period. The fact that, this difference is one of the problems most frequently encountered by cement manufacturers. In this study, the limit value of 4 MPa specified in EN 197-2 standard was examined statistically according to cement type, constituents’ type and strength class. In the study, the compressive strength results of 5037 different types and strength classes of cements belonging to 68 manufacturers taken from a notified body, TCMA’s Economic Enterprise, The Council for Quality and Environment, were used. As a result, it was found that the difference between the certification body and the manufacturer's compressive strength test results is dependent on the strength class of cement and especially on the determined compressive strength. In addition, the effects of cement type and constituents have been determined.