Akademik Veri Yönetim Sistemi
Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, İnşaat Mühendisliği Bölümü, Türkiye
Tezin Onay Tarihi: 2018
Öğrenci: BAKİ AYKUT BİLGİNER
Danışman: SİNAN TURHAN ERDOĞAN
Özet:Magnesium potassium phosphate cements (MKPCs) have some promising properties to be considered as an alternative to ordinary Portland cement binders. The favorable properties of these cements are high early and ultimate strength. On the other hand, they have some problems like rapid setting, high heat of reaction, high cost and poor water stability. In this study, the effect of several factors like magnesium-to-phosphate molar ratio (M/P), water-to-binder ratio (W/B) and retarder (borax) content on properties such as setting time, compressive strength and on the microstructural evolution of MKPC pastes is investigated. Also, the effect of sand-to-binder ratio (S/B) and fly ash content on properties of MKPC mortar is investigated. The setting times of the paste samples were found to be between 4 and 10 min. The compressive strengths of the pastes were about 50 MPa. The 28 d compressive strength of the highest-strength mortar, prepared with S/B = 1.25, was almost 80 MPa. This value decreased with increasing fly ash content. Also, the strength loss in water did not seem to change with fly ash replacement. TGA and SEM investigations were also performed on paste samples used to study the effects of M/P and fly ash content.