Cemented Paste Backfill (CPB) Method is an important tailings management system that can provide support against collapses due to the roof loads, as well as enabling storage possibilities of high amount of process tailings at the underground. Therefore, it gains important that the paste material created in this system gets the maximum strength value depending on the time. For this purpose, the optimum mixing ratios of the paste material should be determined with minimum costs. The main purpose of this study is to determine the additive rate that it can substitute for cement in order to reduce the amount of cement, which constitutes one of the high costs of paste backfill. Firstly, the solid content of the paste material was determined as 80% according to the slump tests, and then CPB reference samples were prepared. By taking the solid content of 80% fixed, 3-11% cement was used, it was determined that the strength of the samples containing 9% and 11% cement gave sufficient strength values. Subsequently, 20-30-40 and 50% of these cement ratios were substituted with fly ash samples and their effects on the strength of CPB were examined over the curing times of 28, 56 and 90 days. As a result, it put forth that, according to reference samples, fly ash substitution of up to 30% can use in the paste mixtures with 9% cement ratio, especially in curing periods of 56 and 90 days. In addition, up to 50% fly ash substitution can use instead of cement in 11% cement.
Pb-Zn Tailings Cemented Paste Backfill (CPB) Fly Ash Strength
Pb-Zn Atıkları Çimentolu Macun Dolgu (ÇMD) Uçucu Kül Dayanım
Birincil Dil | Türkçe |
---|---|
Konular | Yer Bilimleri ve Jeoloji Mühendisliği (Diğer) |
Bölüm | Araştırma Makaleleri \ Research Articles |
Yazarlar | |
Yayımlanma Tarihi | 25 Haziran 2020 |
Gönderilme Tarihi | 27 Ocak 2020 |
Kabul Tarihi | 3 Mayıs 2020 |
Yayımlandığı Sayı | Yıl 2020 Cilt: 8 Sayı: 2 |