Yıl 2020, Cilt , Sayı 20, Sayfalar 815 - 826 2020-12-31

Halloysit Nano-Kil, Nano-SiO2 ve Nano-CaO’in Tekli ve İkili Kullanımının Çimento Esaslı Harçların Özelliklerine Etkileri

Abdul Wakil QARLUQ [1] , Rıza POLAT [2] , Fatma FATMA KARAGÖL [3]


Nano boyutlu malzemeler çok büyük özgül yüzey alanlarına sahip oldukları için kimyasal aktiviteleri oldukça yüksektir. Bu yüksek reaktivite özelliği, çimento esaslı malzemelerin farklı özelliklerinin geliştirilmesinde dikkate değer bir rol oynamaktadır. Ayrıca bu malzemelerin filler etkisi ile gözenekleri doldurma mekanizmaları sayesinde yüksek mikro-yapı yoğunluğu elde edilmektedir. Bu sebeple nano parçacıkların kısmen de olsa çimento ile yer değiştirmesi mekanik ve durabilite özelliklerini geliştirmektedir. Bu amaçla, çimento yerine toplam bağlayıcı ağırlığının %1, %3 ve %5’i oranlarında halloysit nano-kil, nano-SiO2 ve nano-CaO, tekli ve ikili kullanılarak harç karışımları üretilmiştir. Tüm karışımlarda su/bağlayıcı oranı ise 0.38 olarak seçilmiştir. Üretilen harç numunelerin, 7, 28 ve 60 günlük basınç dayanımları, 28 ve 60 günlük ultrases geçiş hızları ve Langavant yöntemi ile hidratasyon ısısı değerleri tespit edilmiştir. Sonuç olarak, nano malzeme kullanılması durumunda tüm karışımların hem erken yaş hem de ileri yaş basınç dayanımları artmıştır. En yüksek basınç dayanımı %3 halloysit nano-kil ve %5 nano-CaO içeren karışımlarda elde edilmiştir. Nano malzemelerin ikili kullanımının, basınç dayanımında tekli kullanım kadar etkili olmadığı tespit edilmiştir. Ultrases geçiş hızları sonuçları, dayanım sonuçları ile paralellik göstermektedir. Nano malzeme kullanılması durumunda hidratasyon ısılarında, nano-CaO içeren numunelerde CaO’in aktivitesinden dolayı artış gözlenmiştir fakat diğer tüm karışımlarda çok önemli bir değişiklik elde edilmemiştir.
Since nano-sized materials have very large specific surface areas, their chemical activities are quite high. This high reactivity property plays a notable role in improving the different properties of cement-based materials. Besides, a high microstructure density is achieved thanks to the filler effect of these materials and the mechanism of filling the pores. Therefore, the replacement of nanoparticles with cement, even partially, improves its mechanical and durability properties. For this purpose, mortar mixtures were produced using 1%, 3% and 5% halloysite nano-clay, nano-SiO2 and nano-CaO, single and dual, instead of cement. The water/binder ratio was chosen as 0.38 in all mixtures. Compressive strengths of 7, 28 and 60 days, ultrasonic pulse velocity for 28 and 60 days and heat of hydration were determined by the Langavant method of the produced mortar samples. As a result, in the case of using nanomaterials, the compressive strengths of all mixtures both in early and old age have increased. The highest compressive strength was obtained in mixtures containing 3% halloysite nano-clay and 5% nano-CaO. It has been determined that dual use of nanomaterials is not as effective as singular use in compressive strength. Ultrasonic pulse velocity results are in line with strength results. According to the experimental results in the case of using nanomaterials, the hydration heat increased due to the activity of CaO in the samples containing nano-CaO. However, no significant change was obtained in all other mixtures.
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Birincil Dil tr
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Yazarlar

Orcid: 0000-0002-9822-7697
Yazar: Abdul Wakil QARLUQ
Kurum: ATATÜRK ÜNİVERSİTESİ
Ülke: Turkey


Orcid: 0000-0002-8990-035X
Yazar: Rıza POLAT (Sorumlu Yazar)
Kurum: ATATÜRK ÜNİVERSİTESİ
Ülke: Turkey


Orcid: 0000-0003-1760-1972
Yazar: Fatma FATMA KARAGÖL
Kurum: ATATÜRK ÜNİVERSİTESİ
Ülke: Turkey


Tarihler

Yayımlanma Tarihi : 31 Aralık 2020

APA Qarluq, A , Polat, R , Fatma Karagöl, F . (2020). Halloysit Nano-Kil, Nano-SiO2 ve Nano-CaO’in Tekli ve İkili Kullanımının Çimento Esaslı Harçların Özelliklerine Etkileri . Avrupa Bilim ve Teknoloji Dergisi , (20) , 815-826 . DOI: 10.31590/ejosat.792365