Çelik Fiber İçeren Dayanımlı Beton Özellikleri Üzerine Metakaolin Ve Öğütülmüş Pomzanın Etkisi
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Tarih
2014
Yazarlar
Dergi Başlığı
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Cilt Başlığı
Yayıncı
Niğde Üniversitesi
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Bu çalıGmada çelik fiber içeren yüksek dayanımlı beton özellikleri üzerine metakaolin, öğütülmüG pomza ve metakaolin ile birlikte kullanılan öğütülmüG pomzanın etkileri deneysel olarak araGtırılmıGtır. Deneysel çalıGmada, kontrol betonlarından hariç 6 farklı seride bu mineral katkılar kullanılarak 30 farklı karıGımda beton üretilmiGtir. Birinci seride, çimento yerine ağırlıkça metakaolin, ikinci seride çimento yerine ağırlıkça öğütülmüG pomza ve üçüncü seride çimento yerine ağırlıkça metakaolin ile birlikte öğütülmüG pomza yer değiGtirilerek 7 farklı kombinasyonda kullanılmıGtır. Diğer seriler ise ilk üç serideki karıGımlara çelik fiber eklenerek üretilmiGtir. Ayrıca tüm karıGımlarda bağlayıcı miktarı 500 kg/m³, su-bağlayıcı oranı 0.20 ve çökme değerleri 8??2 cm olarak belirlenmiGtir. KarıGımlarda, su miktarını azaltmak ve sabit bir çökme değerini belirlemek için yüksek oranda su azaltıcı özelliğe sahip süper akıGkanlaGtırıcı farklı oranlarda kullanılmıGtır. Taze beton özelliklerinden çökme ve taze birim ağırlık deneyleri yapılmıGtır. SertleGmiG beton özelliklerinden ise sertleGmiG birim ağırlık, ultrases geçiG hızı, basınç dayanımı, eğilme dayanımı ve yarmada çekme dayanımı değerleri deneysel olarak belirlenmiGtir. Kontrol betonları ile diğer serilerdeki betonlardan elde edilen deneysel sonuçlar karGılaGtırılmıGtır. Ayrıca, farklı serilerdeki betonlar da birbirleri ile karGılaGtırılmıG ve en uygun mineral katkı oranları belirlenmeye çalıGılmıGtır. KarGılaGtırmalarda metakaolin içeren betonların performansının diğerlerine göre daha yüksek olduğu gözlenmiGtir. Sonuç olarak, tüm serilerde yüksek dayanımlı beton elde edilebileceği gözlenmiGtir
In this study has been experimentally investigated the effects of metakaolin, ground pumice and metakaolin together with ground pumice on the properties of high performance concrete containing steel fiber. In the study, except for control concretes by using these mineral additions in six different series, 30 different mixtures were produced. In the first series, metakaolin was used to replace by weight of Portland cement, in the second series, ground pumice was used to replace by weight of Portland cement, and also in the third series, ground pumice was used in the seven different combinations to replace by weight of Portland cement together with metakaolin to replace by weight of Portland cement. The other series were produced by adding steel fiber to previous series. Also, in the all mixtures, a constant total binder content of 500 kg/m³, the water-binder ratios of 0.20 and slump values of 8?2 cm were designed. The superplasticizer, which has high ratio of water reducing effect, was used in different proportions to reduce the water proportion and determine the value of constant slump value in the mixtures. The slump and unit weight of fresh concrete properties were tested. The hardened unit weight, ultrasound pulse velocity, compressive strength, flexural strength and splitting tensile strength values of hardened concrete properties were also experimentally determined. The results of control concretes were compared with the results of other series. The results of concrete in the different series were also compared with the results of each other, and tried to determine optimum ratios of mineral additives. As a result, it is seen that high strength concrete can be obtained in all series …
In this study has been experimentally investigated the effects of metakaolin, ground pumice and metakaolin together with ground pumice on the properties of high performance concrete containing steel fiber. In the study, except for control concretes by using these mineral additions in six different series, 30 different mixtures were produced. In the first series, metakaolin was used to replace by weight of Portland cement, in the second series, ground pumice was used to replace by weight of Portland cement, and also in the third series, ground pumice was used in the seven different combinations to replace by weight of Portland cement together with metakaolin to replace by weight of Portland cement. The other series were produced by adding steel fiber to previous series. Also, in the all mixtures, a constant total binder content of 500 kg/m³, the water-binder ratios of 0.20 and slump values of 8?2 cm were designed. The superplasticizer, which has high ratio of water reducing effect, was used in different proportions to reduce the water proportion and determine the value of constant slump value in the mixtures. The slump and unit weight of fresh concrete properties were tested. The hardened unit weight, ultrasound pulse velocity, compressive strength, flexural strength and splitting tensile strength values of hardened concrete properties were also experimentally determined. The results of control concretes were compared with the results of other series. The results of concrete in the different series were also compared with the results of each other, and tried to determine optimum ratios of mineral additives. As a result, it is seen that high strength concrete can be obtained in all series …
Açıklama
Anahtar Kelimeler
Metakaolin, Öğütülmüş Pomza, Çelik Fiber, Yüksek Dayanımlı Beton
