Effect of the Partial Replacement of Blast Furnace Slag and Perlite on the Mechanical and Microstructural Properties of Cemented Paste Backfill

Year 2017, Volume: 32 Issue: 2, 239 - 252, 15.06.2017

Tekin Yılmaz Bayram Erçıkdı Ferdi Cihangir

https://doi.org/10.21605/cukurovaummfd.358429

Cited By: 5

Abstract

Recently, the utilization of natural and artificial pozzolans for the partial replacement of Ordinary
Portland cement (OPC) has become widespread to be increased the strength and durability, be improved
the resistance to acid and sulphate effect and be reduced binder costs of cemented paste backfill (CPB). In
this study, the effect of partial replacement of blast furnace slag (BFS) and perlite (P) was investigated on
the mechanical and microstructural properties of CPB. A total of 84 CPB samples prepared with the
replacement of 20 wt.% of BFS and P were subjected to the uniaxial compressive strength (UCS) and
porosity tests at 7, 14, 28 and 56 days of curing periods. The CPB samples with replacement of BFS
produced lower UCS than OPC samples at 7-14 days, while, they exceeded the UCS of OPC samples at
28-56 days of curing time. When the porosity results were examined, the porosity of BFS samples
demonstrated more improvement with increasing the curing times. CPB samples with replacement of perlite were weak in terms of improvement of UCS and porosity. The findings indicated that the
utilization of partial replacement of BFS in CPB is beneficial on the mechanical and microstructural
properties of CPB.

Keywords

Compressive strength, Porosity, Cemented paste backfill, Blast furnace slag, Perlite

Yüksek Fırın Cürufu ve Perlit İkamesinin Çimentolu Macun Dolgunun Mekanik ve Mikroyapı Özelliklerine Etkisi

Abstract

Son yıllarda Portland çimentosu (PÇ) yerine belirli oranlarda doğal ve yapay puzolanların kullanılması,
çimentolu macun dolgunun (CPB) dayanım ve duraylılığının iyileştirilmesi, asit ve sülfat etkisine karşı
direncinin arttırılması ve bağlayıcı maliyetlerinin azaltılması için oldukça yaygın hale gelmiştir. Bu
çalışmada yüksek fırın cürufu (YFC) ve perlit (P) ikamesinin CPB’nin mekanik ve mikroyapı
özelliklerine etkisi araştırılmıştır. PÇ yerine ağırlıkça %20 YFC ve P ikame edilerek hazırlanan 84 adet
CPB numunesi 7, 14, 28 ve 56 günlük kür süreleri sonunda tek eksenli basınç dayanımı ve gözeneklilik
(porozite) testlerine tabi tutulmuştur. YFC’li numuneler 7-14 günde PÇ numunelerine göre daha düşük
dayanım üretirken 28-56 günde bu numunelerin basınç dayanımını geçmiştir. Gözeneklilik sonuçları
incelendiğinde, YFC’li numunelerin gözenekliliği kür süresinin artmasıyla daha fazla iyileşme
göstermiştir. Perlit katkılı numuneler ise basınç dayanımı ve gözeneklilik gelişimi açısından zayıf
kalmıştır. Elde edilen bulgular YFC’nin CPB içerisinde belirli oranlarda kullanımının mekanik ve
mikroyapı özellikleri açısından faydalı olduğunu göstermiştir.

Keywords

Basınç dayanımı, Gözeneklilik, Çimentolu macun dolgu, Yüksek fırın cürufu, Perlit

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