Yüksek Fırın Cürufu İkameli Çimentoların Yapısal ve Mekanik Özelliklerinin Araştırılması

Gerek doğal gerekse yapay puzolanik malzemeler çimento ve beton teknolojisinde yoğun olarak kullanılmaktadır. Özellikle yapay puzolanların kullanımının atık değerlemesi, çevre kirliliğinin azaltılması, enerji kaynaklarının korunması, dayanım ve dayanıklılığa katkısı nedeniyle giderek yaygınlaştığı görülmektedir. Bu amaçla yapılan çalışmanın ilk aşamasında Portland çimento ve yüksek fırın cürufunun fiziksel, kimyasal, mineralojik, termal özellikleri ve bağ yapıları gibi yapısal özellikleri belirlenmiştir. İkinci aşamada yüksek fırın cürufu ağırlıkça %0, %5, %10, %15 ve %20 oranlarında Portland çimento yerine ikame edilerek 5 tipte çimento elde edilmiştir. Üçüncü aşamada ise bu çimentolarla üretilen çimento hamur ve harç örnekleri üzerinde su ihtiyacı, genleşmesi, priz süresi ve basınç dayanımı değerleri belirlenmiştir. Sonuç olarak yapılan deneyler neticesinde elde edilen veriler, Portland çimento ve yüksek fırın cürufunun fiziksel, kimyasal, mineralojik özellikleri ile bağ yapılarına göre su ihtiyacında, priz sürelerinde ve basınç dayanımlarında farklılıklar olduğunu göstermiştir. Nihayetinde endüstriyel bir atık olan yüksek fırın cürufunun çimento ve beton teknolojisinde kullanılmasıyla ekonomik ve ekolojik yarar sağlanabileceği düşünülmektedir.

Anahtar Kelimeler:

Yüksek fırın cürufu, Portland çimento, termal analiz, XRD, FT-IR, basınç dayanımı

Investigation of Structural and Mechanical Properties of Blast Furnace Slag Substituted Cements

Both natural and artificial pozzolanic materials extensively in cement and concrete technology are used. It is seen that especially the use of artificial pozzolans are becoming widespread due to their contribution to waste valuation, reduction of environmental pollution, protection of energy resources, strength and durability. For this purpose, in the first stage of the study, the structural properties of Portland cement and blast furnace slag such as physical, chemical, mineralogical, thermal properties and bond structures were determined. In the second stage, 5 types of cement were obtained by replacing Portland cement at 0%, 5%, 10%, 15% and 20% by weight of blast furnace slag. In the third stage, water requirement, volume expansion, setting time and compressive strength values were determined on cement paste and mortar samples produced with these cements. As a result, the data obtained as a result of the experiments showed that there are differences in water demand, setting times and compressive strengths according to the physical, chemical, mineralogical properties and bond structures of Portland cement and blast furnace slag. It is thought that economic and ecological benefits can be achieved by using blast furnace slag, which is an industrial waste, in cement and concrete technology.

Keywords:

Portland cement, Blast furnace slag, Thermal analysis, XRD, FT-IR, Compressive strength,

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