Increasing Strength of Clay Soils with the Use of Basalt Fiber: An Experimental Study

Abstract

Due to the increase in population, the demand for buildings increases. The engineering properties of the soils on which these structures will be built may not always meet the desired conditions. In such cases, soil improvement methods are used. One of these methods is additive used stabilization, in which additives such as lime, fly ash, volcanic ash and tuff, silica fume, and blast furnace slag are used. This method has been used successfully for years. However, in recent years, interest in the use of different types of fibers has increased. Some of these fibers are glass, basalt, polypropylene, and carbon. Basalt fibers have begun to attract attention in soil reinforcement applications due to the properties of their raw material, basalt rock, which is widely distributed in nature, natural, and has high strength. In this study, the effect of basalt fiber reinforcement on the unconfined compressive strength of high plasticity bentonite clay was revealed. For this purpose, 12 mm long basalt fiber in different proportions (1%, 2%, 3%, 4%, and 5%) was used as reinforcement in bentonite clay, and the optimum fiber ratio that provided the maximum increase in strength was determined. According to the results of the study, when 12 mm long basalt fiber was used as reinforcement in bentonite clay, the maximum strength value was obtained at a 4% basalt fiber ratio. However, the strength value decreased in the sample where 5% BF was used. It has been determined that basalt fiber reinforcement improves the strength properties of bentonite clay.

Keywords

• Basalt fiber
• bentonite clay
• reinforcement
• unconfined compressive strength

Bazalt Fiber Kullanımı ile Killi Zeminlerin Dayanımının Artırılması: Deneysel Bir Çalışma

Abstract

Nüfusun artışına bağlı olarak yapılara olan talepte artmaktadır. Bu yapıların inşa edileceği zeminlerinde mühendislik özellikleri her zaman istenilen şartları sağlamayabilir. Böyle durumlarda zeminlerin iyileştirilmesi yöntemlerine başvurulmaktadır. Bu yöntemlerden biri de kireç, uçucu kül, volkanik kül ve tüf, silis dumanı, yüksek fırın cürufu gibi katkıların kullanıldığı katkılı stabilizasyondur. Bu yöntem yıllardır başarılı bir şekilde uygulanmaktadır. Fakat son yıllarda farklı türde fiberlerin kullanımına olan ilgi artmıştır. Bu fiberlerden bazıları cam, bazalt, polipropilen ve karbondur. Özellikle bazalt fiberler, hammaddesi olan bazalt kayacının doğada geniş yayılım göstermesi, doğal olması ve dayanımın yüksek olması gibi özelliklerinden dolayı zemin güçlendirme uygulamalarında oldukça dikkat çekici olmaya başlamıştır. Bu çalışmada yüksek plastisiteli bentonit kilinin serbest basınç dayanımında bazalt fiber takviyesinin etkisi ortaya konmuştur. Bu amaçla 12 mm uzunluğunda ve farklı oranlarda (%1, %2, %3, %4 ve %5) bazalt fiber, bentonit kilinde takviye olarak kullanılmış ve dayanımda maksimum artışı sağlayan optimum fiber oranı belirlenmiştir. Çalışmanın sonuçlarına göre, 12 mm uzunluğundaki bazalt fiber bentonit kilinde takviye olarak kullanıldığında maksimum dayanım değeri %4 bazalt fiber oranında elde edilmiştir. Ancak %5 BF kullanılan örnekte dayanım değeri azalmıştır. Bazalt fiber takviyesinin bentonite kilinin dayanım özelliklerini iyileştirdiği belirlenmiştir.

Keywords

• Bazalt fiber
• bentonit kili
• güçlendirme
• serbest basınç dayanımı.

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