The effect of basalt fiber reinforcement at different ratios on the unconfined compressive strength of kaolin

Abstract

There are many materials used for stabilization or reinforcement of low strength soils. While additives such as fly ash, lime, tuff, silica fume are preferred in stabilization works, fibers are used in reinforcement works. The use of fiber, which has emerged as an alternative to traditional methods, has become widespread. The most preferred fiber types in soil reinforcement are glass, carbon, polypropylene and basalt fibers. Basalt fiber, which is produced from basalt rock and widely distributed in nature, was chosen as a reinforcement material in this study, which is increasingly used due to its high strength, economic, environmentally friendly, natural and many other superior properties. The aim of this study is to examine the effects of basalt fiber ratio on strength in low plasticity kaolin clay reinforced with basalt fiber. For this purpose, unconfined pressure tests were carried out on cylindrical samples prepared by adding 6 mm long basalt fiber at different rates to clay and compressing it at optimum water content. In the samples reinforced with basalt fiber, the maximum strength was obtained from the sample which has 2 % basalt fiber ratio. It was determined that the strength decreased in samples with higher basalt fiber content.

Keywords

• Basalt fiber
• Reinforcement
• Kaolin clay
• Unconfined compressive strength

Farklı oranlardaki bazalt fiber takviyesinin kaolinin serbest basınç dayanımına etkisi

Öz

Dayanımı düşük olan zeminleri stabilize etmek veya güçlendirmek amacıyla kullanılan birçok malzeme bulunmaktadır. Stabilize çalışmalarında uçucu kül, kireç, tüf, silis dumanı gibi katkı malzemeleri tercih edilirken, güçlendirme çalışmalarında ise fiber kullanımı yaygınlaşmaktadır. Geleneksel yöntemlere alternatif olarak ortaya çıkan fiber kullanımı yaygınlaşmıştır. Zemin güçlendirmede en fazla tercih edilen fiber türleri ise cam, karbon, polipropilen ve bazalt fiberlerdir. Doğada çok geniş yayılım gösteren bazalt kayasından üretilen, dayanımı yüksek, ekonomik, çevre dostu, doğal ve daha birçok üstün özelliğinden dolayı günümüzde kullanımı artan bazalt fiber bu çalışmada takviye malzemesi olarak seçilmiştir. Bu çalışmanın amacı, bazalt fiber ile güçlendirilen düşük plastisiteli kaolin kilinde bazalt fiber oranının dayanıma olan etkilerinin incelenmesidir. Bu amaçla 6 mm uzunluğundaki bazalt fiberin kile farklı oranlarda eklenmesi ve optimum su içeriğinde sıkıştırılmasıyla hazırlanan silindirik örneklerde serbest basınç deneyleri gerçekleştirilmiştir. Bazalt fiber ile güçlendirilen örneklerde maksimum dayanım % 2 bazalt fiber katkı oranına sahip örnekte elde edilmiştir. Bazalt fiber oranının daha fazla olduğu örneklerde ise dayanımın azaldığı belirlenmiştir.

Anahtar Kelimeler

• Bazalt fiber
• Güçlendirme
• Kaolin kili
• Serbest basınç dayanımı

Kaynakça

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