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Bu çalışmada Afşin Elbistan/ Kahramanmaraş termik santral atığı C tipi uçucu kül (UK) kullanılmıştır. Bu kül öğütülmüş ve 6 farklı incelik değeri elde edilmiştir. Uçucu küle ait değişik incelik değerleri ile betonda çimento yerine % 10, % 30 ve % 50 ikame oranlarında kullanılarak katkılı ve uçucu kül katkısız referans beton örnekleri hazırlanmıştır. Sertleşmiş beton örnekleri üzerine uçucu kül incelik değerinin etkisini belirlemek için aşınma ve karbonatlaşma direnci deneyleri yapılmıştır. Aşınma direnci ASTM C 944-99 standardında ifade edilen Rotating Cutter yöntemine göre 28, 56 ve 90 günlük kür süresini tamamlamış beton örnekleri üzerine uygulanmıştır. Karbonatlaşma direnci için örnekler 360 gün karbondioksit miktarı yoğun bir ortama bırakılmış ve karbonatlaşma derinliği belirlenmiştir. Elde edilen deney sonuçlarına göre % 10 ve % 50 uçucu kül ikameli beton numunelerinde öğütme süresinin eğilme dayanımı üzerinde pek fazla etkili olmamış, ama referans numuneye göre uçucu kül ikamesinin dayanımı artırdığı anlaşılmıştır. Ayrıca % 30 uçucu kül ikameli beton numunelerinde öğütme süresinin eğilme dayanımını çok az artırdığı görülmektedir, ancak bu karışım oranıda referans numunenin elde ettiği dayanım değerinin altında değer almıştır. Beton karışımlarına ikame edilen uçucu kül oranlarının artmasıyla birlikte karbonatlaşma derinliği artmıştır. En yüksek karbonatlaşma derinliği değeri 0, 20, 30 ve 45 dakika öğütme sürelerine sahip % 50 UK ikameli beton örneğinde (1,0 cm), en düşük karbonatlaşma derinliği değeri (0.3 cm) ise 10 ve 45 dakika öğütme süresine sahip % 10 UK ikameli beton örneklerinde elde edilmiştir. Elde edilen sonuçlara göre beton karışımlarında kullanılan UK’ün öğütme süresinin karbonatlaşma derinliği üzerinde pek fazla değişikliğe neden olmadığı görülmüştür. % 10, 30 ve 50 UK ikameli beton karışımları içerisinde en fazla aşınma miktarı 28 günlük kür süresinde meydana gelmiştir. % 10 UK ikameli beton karışımında öğütme süresi artıkça 28 günlük kür süresi numunelerinin aşınma miktarınında genel olarak arttırdığı söylenebilir, ama 56 ve 90 günlük kür sürelerinde pek etkisi olduğu söylenemez. Diğer UK ikame oranlarında (% 30 ve 50) öğütme süresinin artmasıyla 28, 56 ve 90 günlük kür süresine sahip numunelerinin aşınma miktarlarında belirgin bir değişiklik gözlemlenmemiştir.
In this study, Afshin Elbistan/Kahramanmaraş thermal power plant waste type C flying sand (UK) was used. This sand has been melted and 6 different thin values have been obtained. With the different thinness values of the flying coal, the reference concrete samples are prepared with the use of 10% and 30% and 50% residence rates instead of cement in the concrete, and the reference concrete samples are prepared with the use of 10% and 50% residence rates. Examination and carbonatization resistance tests have been conducted to determine the effect of the thinity value of flying ashes on solid concrete samples. The steam resistance is applied on concrete samples that have completed the 28, 56 and 90 day curing period according to the Rotating Cutter method expressed in ASTM C 944-99 standard. Examples for carbonatization resistance have been left in an intense environment for 360 days with the amount of carbon dioxide and the carbonatization depth has been determined. According to the results of the trial, 10 percent and 50 percent flying ashes in concrete samples did not have much effect on the inclination resistance, but the reference sample found that the flying ashes increased the resistance. In addition, it is also seen that in 30 percent flying ashes of concrete samples, the thinning time has significantly increased the inclination resistance, but this mixture has received a value below the resistance value the reference sample obtained. With the increase in the rates of flying ashes in the concrete mixture, the carbonatization depth has increased. The highest carbonatization depth value is 0, 20, 30 and 45 minutes in the 50 % UK steel concrete sample (1.0 cm), the lowest carbonatization depth value (0. 3 cm) is obtained in 10 % UK-covered concrete samples with 10 and 45 minutes of moisture time. According to the results obtained, the UK’s damp time used in concrete mixture has not shown to cause much change in the carbonatization depth. In 10, 30 and 50 percent of the UK-sized concrete mixture, the maximum amount of coating occurred in the 28 day curing period. It can be said that in the 10% UK steam concrete mixture, the refining time now increases the amount of refining in 28 days, but it cannot be said that it has a lot of effect in the 56 and 90 days of refining. In other UK residence rates (30% and 50%) there has been no significant change in the amounts of amounts of amounts of amounts of amounts of amounts of amounts of amounts of amounts of amounts of amounts of 28, 56 and 90 days.
Afşin Elbistan / Kahramanmaraş thermal power plant waste C type fly ash (UK) was used in this study. This ash was ground and 6 different fineness values were obtained. With different fineness values of fly ash, reference concrete samples with and without fly ash admixture were prepared by using 10%, 30% and 50% substitution rates instead of cement in concrete. Abrasion and carbonation resistance tests were performed to determine the effect of fly ash fineness on hardened concrete samples. Abrasion resistance was applied on concrete samples which have completed curing time of 28, 56 and 90 days according to Rotating Cutter method stated in ASTM C 944-99 standard. For carbonation resistance, the samples were left in a dense medium for 360 days and the carbonation depth was determined. According to the experimental results obtained; In 10% and 50% fly ash substitute concrete samples, grinding time did not have much effect on bending strength, but it was found that fly ash substitution increased the strength according to the reference sample. Furthermore, it is seen that the grinding time increases slightly the tensile splitting strength in 30% fly ash substitute concrete samples, but this mixture ratio is below the resistance value obtained by the reference sample. The depth of carbonation increased with the increase of fly ash content added to concrete mixtures. The highest carbonation depth value is in the 50% UK substituted concrete sample (1.0 cm) with 0, 20, 30 and 45 minutes grinding time, the lowest carbonation depth value (0.3 cm) is 10% UK substituted with 10 and 45 minutes grinding time concrete samples. According to the results obtained; It was found that the grinding time of UK used in concrete mixtures did not cause much changes on the carbonation depth. The maximum wear rate in the 10, 30 and 50% UK substituted concrete mixtures occurred during the curing period of 28 days. It can be said that the 28-day curing time increases the wear amount of the samples as the grinding time increases in the 10% UK-substituted concrete mixture, but it is not very effective in curing times of 56 and 90 days. In other UK substitution rates (30 and 50%), it cannot be said that the abrasion amounts of the samples with a curing time of 28, 56 and 90 days are increased as the grinding time increases.
Field : Fen Bilimleri ve Matematik; Mühendislik
Journal Type : Uluslararası
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