Metakaolin Katkılı Sisal Lifle Güçlendirilmiş Kendiliğinden Yerleşen Betonların Bazı Özelliklerinin İncelenmesi

Yıl 2024, Cilt: 16 Sayı: 2, 736 - 748, 30.06.2024

Mehmet Uzun

https://doi.org/10.29137/umagd.1451024

Öz

Beton en yaygın yapı malzemelerinden biridir. Beton yüksek durabilite, düşük maliyet gibi özellikleri ile ön plana çıkmaktadır. Ancak beton düşük eğilme ve çekme dayanımı, gözenekli yapı gibi olumsuz özellikleri de sahiptir. Bu nedenle betonun olumsuz özelliklerini geliştirmek için çeşitli çalışmalar devam etmektedir. Betonun içerisinde lif kullanımı son yıllarda betonun düşük mekanik özelliklerini yükseltmek için sıklıkla kullanılan bir yöntemdir. Lifler endüstriyel ve doğal yollarla elde edilmektedir. Doğal yollarla elde edilen liflerin kullanımı çevre dostu olması nedeniyle daha çok tercih edilmektedir.
Bu çalışmada, karışım hacminin %0,5, %1,0, %1,5 ve %2.0’ si kadar sisal lif eklenmiş betonun mekanik özellikleri incelenmiştir. Sisal lif ekli kendiliğinden yerleşen betonların işlenebilirliği, basınç dayanımı, eğilme dayanımı ve donma çözünme dayanımları incelenmiştir. Sonuç olarak betonun işlenebilirliğini ve donma çözünme dayanımını çok kaybetmeden diğer mekanik özelliklerini geliştiren bir lif oranı elde edilmiştir.

Anahtar Kelimeler

Sisal lif, kendiliğinden yerleşen beton, metakaolin, doğal lifler, donma-çözünme

Evaulation of Some Properties of Metakaolin Added and Sisal Fiber Reinforced Self-Compacting Concrete

Öz

Concrete is one of the most common building materials. Concrete stands out with its properties such as high durability and low cost. However, concrete also has negative properties such as low flexural and tensile strength and porous structure. Therefore, various studies are ongoing to improve the negative properties of concrete. The use of fiber in concrete is a frequently used method in recent years to increase the low mechanical properties of concrete. Fibers are obtained by industrial and natural means. The use of fibers obtained by natural means is more preferred due to their environmental friendliness.
In this study, the mechanical properties of concrete with sisal fiber added at 0.5%, 1.0%, 1.5% and 2.0% of the mixture volume were examined. Workability, compressive strength, flexural strength and freeze-thaw resistance of sisal fiber added self-compacting concretes were examined. As a result, a certain fiber ratio that improves the concrete's mechanical properties without losing much of its workability and freeze-thaw resistance was obtained.

Anahtar Kelimeler

Sisal fiber, self-compacting concrete, metakaolin, natural fibers, freeze-thaw

Kaynakça

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