Determination of pozzolanic Activity in Granite Waste Sludge and Sepiolite Substituted Self-Compacting Mortars

Öz

In this study, the strength and durability properties of Self-Compacting Mortars (SCC) produced by replacing Portland Cement (PC) with Granite Waste Sludge (GWS) and Sepiolite (SP) at different ratios were investigated. A total of 17 mortar specimens were produced by using GWS from Granitaş in Kırşehir and light colored SP from Akmin Mineral and Mining in Eskişehir together and separately as cement substitutes. One of the important factors affecting the properties of self-compacting concretes is the fresh properties of mortars. In order to determine the workability and investigate the self-compacting properties of the mortars, mini-slump-scatter and mini V-moon tests were conducted. Three-point bending and compression tests were performed on the prepared specimens at 3, 7 and 28 days periods. In addition, capillary water absorption tests were performed on 28-day old samples and then total porosity ratios, water absorption and densities of the samples were determined. When the GWS material from Kırşehir Granitaş enterprise was evaluated in terms of fresh and hardened properties of mortars, it was determined that it can be used as a mineral additive in mortars at replacement rates up to 15%, and the light-colored SP from Eskişehir Akmin Mineral and Mining enterprise can be used as a mineral additive in mortars at low addition rates. Since GWS contains less water in SCC formations, it has a more void-free structure and micro-filling effect in the specimens, which gave better strength results than the control specimen and SP.

Anahtar Kelimeler

• Self-compacting mortar
• Granite waste sludge
• Sepiolite
• Fresh features
• Poozzolanic features

Granit Atık Çamuru ve Sepiyolit İkameli Kendiliğinden Yerleşen Harçlarda Puzolanik Aktivitenin Belirlenmesi

Öz

Bu çalışma ile, Portland Çimentosu (PÇ) yerine farklı oranlarda Granit Atık Çamuru (GAÇ) ve Sepiyolit (SP) ilave edilerek üretilen Kendiliğinden Yerleşen Harçların (KYH) dayanım ve durabilite özellikleri incelenmiştir. Çimento yerine ikame yöntemiyle Kırşehir yöresinde bulunan Granitaş işletmesine ait GAÇ ve Eskişehir Akmin Mineral ve Madenciliğe ait açık renkli SP’le birlikte ve ayrı ayrı kullanılarak, toplamda 17 adet harç numunesi üretilmiştir. Kendiliğinden yerleşen betonların özelliklerini etkileyen önemli faktörlerden biri harçların taze özelliğidir. Harçların, işlenebilirliğini belirlemek ve kendiliğinden yerleşebilirlik özelliklerini araştırmak amacıyla, mini çökme-yayılma ve mini V-hunisi deneyleri yapılmıştır. Hazırlanan numuneler üzerinde 3, 7 ve 28 günlük periyotlarda üç noktalı eğilme ve basınç deneyi yapılmıştır. Ayrıca 28 günlük numuneler üzerinde kapiler su emme deneyi yapılarak ve daha sonra numunelerin toplam porozite oranları, su emme ve yoğunlukları belirlenmiştir. Kırşehir Granitaş işletmesine ait GAÇ malzemesi, harçların taze ve sertleşmiş özellikleri bakımından değerlendirildiğinde %15 ‘e kadar ikame oranlarında harç içerisinde mineral bir katkı olarak kullanılabilir olduğu, Eskişehir Akmin Mineral ve Madencilik işletmesine ait açık renkli olan SP, düşük ilave oranlarında harç içerisinde mineral bir katkı olarak değerlendirilebilir olduğu belirlenmiştir. GAÇ KYH oluşumlarda daha az su içerdiğinden daha boşluksuz bir yapıya ve numunelerde mikro-dolgu etkisine sahip olması nedeniyle kontrol numunesi ve SP’den daha iyi dayanım sonuçları vermiştir.

Anahtar Kelimeler

• Kendiliğinden yerleşen harç
• Granit atık çamuru
• Sepiyolit
• Taze özellikleri
• Puzolanik özellikleri

Kaynakça

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