Utilization of Coal Ashes from Tea Factory as Fine Aggregate in Concrete Roads

Tunahan Hacımustafaoğlu; Tuba Kütük; İlknur Bekem Kara

Makale detayları

Utilization of Coal Ashes from Tea Factory as Fine Aggregate in Concrete Roads

Yazarlar:

Tunahan Hacımustafaoğlu | Tuba Kütük | İlknur Bekem Kara

Yayıncı:

Recep Tayyip Erdoğan University

Ana Başlıklar:

Yapı Malzemeleri

Dergi:

Recep Tayyip Erdoğan Üniversitesi Fen ve Mühendislik Bilimleri Dergisi Vol.4 Issue 2, pp.196-207

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001306852

pISSN:

2687-2315

Anahtar kelimeler:

Özet:

 Concrete is one of the most demanded materials in the construction industry. The search for new materials that can be used instead of aggregate continues in order to protect natural resources, find solutions to the disposal problem of waste materials and reduce construction costs by using waste materials. In this study, it was aimed to determine whether the coal ash waste CAW generated in tea factories can be disposed of by using it instead of fine aggregate in road concrete. After the physical, chemical and morphological properties of CAW were determined, concrete pavement design was made by substituting 0-1 mm fine aggregate at the rates of 0, 25, 50, 75 and 100. Density and pH values of fresh concrete were measured and placed in molds. Hardened concrete test measurements consisting of Schmidt hammer, ultrasonic pulse velocity, capillary water absorption, compressive, flexural, splitting tensile and abrasion strength were carried out on the 7th and 28th days. Additionally, heavy metal leaching of 0 and 50 CAW substituted concretes was measured. As a result, it has been determined that CAW increases the capillary water absorption values of concrete types, reduces compressive strength, improves tensile strength up to 50 replacement rate, and does not create any change on abrasion resistance up to 50 replacement rate. According to the leakage test results, it has been determined that heavy metals can be eliminated by using CAW in concrete.

 Concrete is one of the most demanded materials in the construction industry. The search for new materials that can be used instead of aggregate continues in order to protect natural resources, find solutions to the disposal problem of waste materials and reduce construction costs by using waste materials. In this study, it was aimed to determine whether the coal ash waste CAW generated in tea factories can be disposed of by using it instead of fine aggregate in road concrete. After the physical, chemical and morphological properties of CAW were determined, concrete pavement design was made by substituting 0-1 mm fine aggregate at the rates of 0, 25, 50, 75 and 100. Density and pH values of fresh concrete were measured and placed in molds. Hardened concrete test measurements consisting of Schmidt hammer, ultrasonic pulse velocity, capillary water absorption, compressive, flexural, splitting tensile and abrasion strength were carried out on the 7th and 28th days. Additionally, heavy metal leaching of 0 and 50 CAW substituted concretes was measured. As a result, it has been determined that CAW increases the capillary water absorption values of concrete types, reduces compressive strength, improves tensile strength up to 50 replacement rate, and does not create any change on abrasion resistance up to 50 replacement rate. According to the leakage test results, it has been determined that heavy metals can be eliminated by using CAW in concrete.

 Concrete is one of the most demanded materials in the construction industry. The search for new materials that can be used instead of aggregate continues in order to protect natural resources, find solutions to the disposal problem of waste materials and reduce construction costs by using waste materials. In this study, it was aimed to determine whether the coal ash waste CAW generated in tea factories can be disposed of by using it instead of fine aggregate in road concrete. After the physical, chemical and morphological properties of CAW were determined, concrete pavement design was made by substituting 0-1 mm fine aggregate at the rates of 0, 25, 50, 75 and 100. Density and pH values of fresh concrete were measured and placed in molds. Hardened concrete test measurements consisting of Schmidt hammer, ultrasonic pulse velocity, capillary water absorption, compressive, flexural, splitting tensile and abrasion strength were carried out on the 7th and 28th days. Additionally, heavy metal leaching of 0 and 50 CAW substituted concretes was measured. As a result, it has been determined that CAW increases the capillary water absorption values of concrete types, reduces compressive strength, improves tensile strength up to 50 replacement rate, and does not create any change on abrasion resistance up to 50 replacement rate. According to the leakage test results, it has been determined that heavy metals can be eliminated by using CAW in concrete.

 İnşaat sektöründe en fazla talep edilen malzemelerden birisi betondur. Doğal kaynakların korunması, atık malzemelerin bertaraf sorununa çözüm bulunması ve atık malzeme kullanılarak inşaat maliyetlerinin düşürülmesi amacıyla agrega yerine kullanılabilecek yeni malzeme arayışları devam etmektedir. Bu çalışmada çay fabrikalarında ortaya çıkan kömür külü atığının KKA yol betonu içerisinde ince agrega yerine kullanılarak bertaraf edilebilirliğinin belirlenmesi amaçlanmıştır. KKA fiziksel, kimyasal ve morfolojik özellikleri tespit edildikten sonra 0, 25, 50, 75 ve 100 oranlarında 0-1 mm ince agregaya ikame edilerek beton yol tasarımı yapılmıştır. Taze betonların yoğunluk ve pH değerleri ölçülmüş ve kalıplara yerleştirilmiştir. Beton test çekici, ultrases geçiş hızı, kapiler su emme, basınç, eğilme, yarmada çekme ve aşınma dayanımlarından oluşan sertleşmiş beton deney ölçümleri 7. ve 28. günlerde gerçekleştirilmiştir. Ayrıca 0 ve 50 KKA ikameli betonların ağır metal sızıntısı ölçülmüştür. Sonuç olarak, KKAnın beton türlerinin kapiler su emme değerlerini arttırdığı, basınç dayanımını azalttığı, çekme dayanımlarını 50 ikame oranına kadar iyileştirdiği, 50 ikame oranına kadar aşınma dayanımı üzerinde herhangi bir değişim yaratmadığı belirlenmiştir. Sızıntı testi sonuçlarına göre ise, KKAnın betonda kullanılmasıyla ağır metallerin bertaraf edilebildiği tespit edilmiştir.

Makale detayları

Utilization of Coal Ashes from Tea Factory as Fine Aggregate in Concrete Roads

Yazarlar:

Tunahan Hacımustafaoğlu | Tuba Kütük | İlknur Bekem Kara

Yayıncı:

Recep Tayyip Erdoğan University

Ana Başlıklar:

Yapı Malzemeleri

Dergi:

Recep Tayyip Erdoğan Üniversitesi Fen ve Mühendislik Bilimleri Dergisi Vol.4 Issue 2, pp.196-207

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001306852

pISSN:

2687-2315

Coal waste ash

concrete road

fine aggregate

strengthKömür külü atığı

Beton yol

İnce agrega

dayanım

Sayı

Makale detayları

Yazarlar: Tunahan Hacımustafaoğlu | Tuba Kütük | İlknur Bekem Kara

Yayıncı: Recep Tayyip Erdoğan University

Ana Başlıklar: Yapı Malzemeleri

Dergi: Recep Tayyip Erdoğan Üniversitesi Fen ve Mühendislik Bilimleri Dergisi Vol.4 Issue 2, pp.196-207

Belge Tipi: Makale

Yayın Tarihi: 12/2023

Belge Dili: Türkçe

Document ID (Org No.): 2001306852

pISSN: 2687-2315

Sayı

Yazarlar:

Tunahan Hacımustafaoğlu | Tuba Kütük | İlknur Bekem Kara

Yayıncı:

Recep Tayyip Erdoğan University

Ana Başlıklar:

Yapı Malzemeleri

Dergi:

Recep Tayyip Erdoğan Üniversitesi Fen ve Mühendislik Bilimleri Dergisi Vol.4 Issue 2, pp.196-207

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001306852

pISSN:

2687-2315