A Review of Strength and Durability Aspects of Concretes Containing Fly Ash as Cement Replacement Constituent


Saeed H., Akbas E. N., Marar K.

14th International Congress on Advances in Civil Engineering, İstanbul, Türkiye, 6 - 08 Eylül 2021, ss.50-57, (Tam Metin Bildiri)

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: İstanbul
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.50-57
  • Orta Doğu Teknik Üniversitesi Kuzey Kıbrıs Kampüsü Adresli: Hayır

Özet

Pozzolanic materials occurring naturally or obtained as a by-product through industrial processes have developed a keen interest among researchers to utilise them as a replacement for cement in order to reduce carbon footprint without compromising the engineering properties of concrete. Fly ash, burnt pulverized coal residue in thermal power plants, is widely available and commonly used as a substitute for cement. This article is aimed to analyse the compressive, splitting tensile and flexural strength performance of concrete containing fly ash of different grades and varying percentages. In addition, the durability of concrete, and testing procedures is also evaluated for fly ash concrete to ascertain optimum criteria to achieve the desired performance. Results showed that due to the pozzolanic activity of fly ash, a high percentage of fly ash caused lower strength gain at an early stage as compared to conventional concrete. Contrarily, using a high volume of fly ash up shows a significant enhancement in terms of tensile strength and in the case of flexural strength, increasing percentages of fly ash decrease the strength of concrete