UÇUCU KÜL İNCELİĞİNİN BETONUN SÜLFAT DİRENCİ ÜZERİNE ETKİSİ

Yıl 2022, Cilt: 9 Sayı: 17, 287 - 303, 31.08.2022

Demet Demir Şahin , Hasan Eker , Mustafa Çullu

https://doi.org/10.54365/adyumbd.1053376

Cited By: 1

Öz

Beton bileşiminden biri olan çimentonun hidratasyonu ile sülfat iyonları arasında oluşan kimyasal reaksiyon
sonucu sülfat korozyonu oluşmakta ve bu oluşum betonda bozulmalara neden olmaktadır. Sülfatın beton üzerinde
oluşturduğu hasarı azaltmak ya da en aza indirmek için çimento yerine uçucu kül gibi puzolanlar kullanılmaktadır.
Bu çalışmada betonun ana bileşenlerinden biri olan çimento yerine çimentoya yakın bileşene sahip olan Afşin
Elbistan Termik Santralinden temin edilmiş uçucu kül atığı kullanılmıştır. Uçucu külün (UK) bilyalı değirmende
0, 10 ve 20 dk öğütülmesi ile elde edilen farklı inceliklere sahip örnekler % 10 UK ikame oranı ile hazırlanarak
uçucu kül katkılı beton örnekleri oluşturulmuştur. Daha sonra bu örnekler; % 5 ve % 10 katkılı sülfat çözeltisine
maruz bırakılmış ve beton örneklerinin sülfat direnci üzerine etkisini araştırmak için basınç dayanımı ve ultrasonik
dalga hızı ölçümü testlerine tabi tutulmuş, ağırlık kayıpları incelenmiştir. Elde edilen sonuçlara göre uçucu kül
öğütme süresine bağlı olarak % 5 ve % 10 sülfat çözeltisine maruz bırakılmıştır ve daha sonra katkılı beton
örneklerindeki basınç dayanım değerlerinde artışlar gözlenmiştir. Sülfat çözeltisi miktarının artmasıyla birlikte
beton örneklerinin basınç dayanımının azaldığı ve bu beton örneklerinin referans örneğine göre daha yüksek basınç
dayanımı değerine sahip olduğu görülmüştür. Bununla birlikte; öğütme süresinin artmasıyla ağırlık kayıplarının
azaldığı görülmüştür. Ayrıca; öğütmenin etkisi ile uçucu külün inceliğinin artması sonucu ultrasonik dalga hızı
değerlerinin de arttığı belirlenmiştir.

Anahtar Kelimeler

Sülfat direnci, incelik, öğütme süresi, uçucu kül, C tipi, beton.

Destekleyen Kurum

yok

Proje Numarası

proje kapsamında çalışma yürütülmemiştir.

Teşekkür

Deneysel çalışmalardaki yardımlarında dolayı Gümüşhane Üniversitesi, Mühendislik ve Doğa Bilimleri Fakültesi, İnşaat Mühendisliği öğrencilerine teşekkür ederiz.

EFFECT OF FLY ASH FİNENESS ON SULFATE RESISTANCE

Öz

Sulphate corrosion occurs due to a chemical reaction between the hydration of cement, which is a concrete compound, and sulphate ions, resulting in deterioration in concrete. Pozzuolanas such as fly ash are used instead of cement to reduce or minimize damage caused by sulphate on concrete. This study uses fly ash tailings from Afsin Elbistan thermal power plant, which has a component close to cement instead of cement, which is one of the main components of concrete. Examples of different fineness obtained by grinding the fly ash (FA) in the ball mill for 0, 10 and 20 minutes were prepared with a FA substitution rate of 10%, creating examples of fly ash-added concrete. These examples were then exposed to a 10% and 5% additive sulphate solution and tested for compressive strength and ultrasonic pulse velocity measurement tests to investigate the effect of concrete samples on sulphate resistance. According to the results obtained, the compressive strength values of concrete samples exposed to a solution of 5% and 10% sulphate have been observed, depending on the fly ash grinding time. It has been found that the concrete samples added have reduced compressive strength by increasing the amount of sulphate solution and have a higher compressive strength value than the reference sample. However, weight losses have been reduced as the grinding time increases. It has also been determined that ultrasonic pulse velocity values have increased as a result of the increase in the fineness of the grinding and the fineness of the flying ash.

Anahtar Kelimeler

Sulfate resistance, fineness, fly ash, C type, concrete.

Proje Numarası

proje kapsamında çalışma yürütülmemiştir.

Kaynakça

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