DOĞAL VOLLASTONİTİN YÜKSEK PERFORMANSLI HARÇLAR ÜZERİNE ETKİLERİ

Öz

Bu çalışma kapsamında Finlandiya’dan temin edilen doğal vollastonitin, yüksek performanslı harcın (YPH) dayanım ve durabilite özellikleri üzerindeki etkileri araştırılmıştır. YPH üretim aşamasında su/bağlayıcı oranı sabit tutularak, vollastonit minerali %3, %6, %9, %12 ve %15 oranlarında karışıma eklenmiştir. Ayrıca yüksek oranda su azaltıcı katkı maddesi (SA) vasıtasıyla karışımın işlenebilirliği sağlanmıştır. Basınç, eğilme ve ultrasonik titreşim hızı testleri 3., 7., 28. ve 90. günlerde yapılırken, kılcal su geçirimliliği ve gaz geçirimliliği deneyleri 28. ve 90. günde uygulanmıştır. Bu deneylerden elde edilen sonuçlara göre, %3 vollastonit içeren karışımda tüm deneyler için performansta iyileşme gözlenmiştir. %6 vollastonit içeriğine sahip karışımda ise kontrol harcına oranla daha iyi sonuçlar elde edilirken, %3 vollastonit içeren karışıma göre performansta azalmalar gözlenmiştir.

Anahtar Kelimeler

• Basınç
• Durabilite
• Eğilme
• Gaz geçirimliliği
• UTH
• Vollastonit
• Yüksek performanslı harç

THE EFFECTS ON HIGH PERFORMANCE MORTARS OF NATURAL WOLLASTONITE

Abstract

In this study, the effects of natural wollastonite obtained from Finland on strength and durability properties of HPM of wollastonite were investigated. In the production of HPM, wollastonite mineral was added to the mixture at 3%, 6%, 9%, 12% and 15% by keeping the water/binder ratio constant. In addition, the workability of the mixture was achieved by means of a high range water reducing admixture (SP). Compressive, flexural and ultrasonic pulse velocity tests were conducted at 3, 7, 28 and 90 days while sorptivity and gas permeability tests were applied at 28 and 90 days. According to the obtained results of these tests, it was observed that the mixtures containing 3% wollastonite had the recuperation in performance for all experiments. Compared to the control mortar, the mixture containing 6% wollastonite indicated the better results whereas the reduction in performance was observed in the comparison the mixture containing 3% wollastonite.

Keywords

• Compressive
• Durability
• Flexural
• Gas permeability
• UPV
• Wollastonite
• High performance mortar

Kaynakça

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