Behcet DÜNDAR, Emriye ÇINAR RESULOĞULLARI, Turhan Can KARCI, Atahan DÖNMEZ

Cam Tozu ve Uçucu Kül Katkılı Harçların Zamana Bağlı Elektriksel Özdirenç ve Mekanik Özelliklerinin İncelenmesi

Mineral katkılar, çimento esaslı kompozitlerin bazı özelliklerini iyileştirmek ve çimento miktarını azaltmak için beton karışımında kullanılmaktadır. Kullanılan çimento miktarının azaltılması ile çevre kirliliğinin ve çimento üretimi sırasındaki yüksek maliyetin önüne geçilmesi sağlanmaktadır. Bu kapsamda çimento ile ağırlıkça %10, %20 ve %30 oranlarında yer değiştirilerek Cam Tozu (CT) ve Uçucu Kül (UK) karışıma ilave edilmiştir. Harç numunelerinin hazırlanmasında bağlayıcı olarak CEM I 42.5/R tipi Portland çimentosu, agrega olarak ise 0-4 mm boyutlarında kırma kum kullanılmıştır. Laboratuvar ortamında 40x40x160 mm boyutlarında üretilen numuneler kalıptan çıkarıldıktan sonra, standart kür havuzunda 7, 28, 56, 90 ve 180 gün boyunca 20±2 °C sıcaklıkta kür edilmiştir. Taze haldeki harç numunelerine yayılma, sertleşmiş harç numunelerine ise basınç ve eğilme dayanımı ile elektriksel özdirenç deneyleri yapılmıştır. Deneysel çalışmalar sonucu elde edilen veriler doğrultusunda erken yaşta CT ve UK ilavesinin elektriksel özdirenci düşürdüğünü fakat numune yaşı ilerledikçe artışlar meydana geldiği görülmektedir. 180 günlük elektriksel özdirenç değeri REF numunesinde 0.04223 kΩm iken %30UK numunesinde 0.04755 kΩm, %30 CT numunesinde ise 0,04621 kΩm değerine ulaşmıştır.

Anahtar Kelimeler:

Cam Tozu, Elektriksel Özdirenç, Mineral Katkı, Uçucu Kül, Glass Powder, Electrical Resistivity, Mineral Additive, Fly Ash

Investigation of Time-Dependent Electrical Resistivity and Mechanical Properties of Glass Powder and Fly Ash Additive Mortars

Mineral additives are preferred to improve the physical, mechanical and durability properties of cement-based composites and to reduce the amount of cement used. By reducing the use of cement, it is ensured that environmental pollution and the high cost of cement production are prevented. In this context, Glass Powder (CT) and Fly Ash (UK) were added to the mixture by replacing 10%, 20% and 30% by weight of cement. In the production of the mortar samples, CEM I 42.5/R type Portland cement was used as the binder, and 0-4 mm crushed sand was used as the aggregate. After the samples produced in the laboratory with dimensions of 40x40x160 mm were removed from the mold, they were cured in the standard curing pool at 20±2 °C for 7, 28, 56, 90 and 180 days. Flow table test, compressive strength, flexural strength and electrical resistivity tests were performed on hardened mortar samples. According to the data obtained as a result of experimental studies, the addition of CT and UK at an early age decreased the electrical resistivity, but the resistance increased significantly as the age of the sample progressed. While the 180-day electrical resistivity value was 0.04223 kΩm in the REF sample, it reached 0.04755 kΩm in the 30%UK sample and 0.04621 kΩm in the 30% CT sample.

Keywords:

Glass Powder, Electrical Resistivity, Mineral Additive, Fly Ash,

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