Bazalt Fiberle Güçlendirilmiş Doygun Silt Zeminin Mekanik Davranışının Deneysel İncelemesi

Year 2017, Volume:6 ICOCEE Special Issue, 341 - 348, 27.12.2017

Cyrille Prosper Ndepete Sedat Sert

https://doi.org/10.17100/nevbiltek.322678

Abstract

Artan
çevresel problemlere çözüm bulabilmek için her alanda, özellikle de inşaat
mühendisliğinde birçok yöntem uygulanagelmektedir. Örneğin zemin
iyileştirmesinde yapay ve doğal malzemelerin kullanımı artarak devam
etmektedir. Son yıllarda doğal bir malzeme olan bazalttan üretilen fiberler
betonarme yapıların güçlendirmesinde yaygın bir şekilde kullanılmakta iken
bazalt fiberlerin zemin iyileştirmesinde kullanılmasına yönelik çalışmaların
sayısı son derece azdır. Buradan hareketle bu çalışmada doğal bir malzeme olan
ve kirletici özelliği olmayan bazalttan üretilen bazalt fiberle güçlendirilmiş
ve konsolide edilmiş doygun silt zeminin mekanik özelliklerinden kayma
direncindeki artış incelenmiştir. Çalışmada, öncelikle doğal, sonrasında 6 mm,
12 mm ve 24 mm uzunluğundaki bazalt fiberlerin silt zemine %1, %1.5 ve %2
oranında katılmasıyla elde edilen numuneler 100 kPa düşey gerilme altında
konsolide edilmiş ve doygun haldeki silt zeminden elde edilen toplam 40 numune
üç eksenli hücre kesme deneyine tabi tutulmuştur. Deney sonuçlarına göre; doğal
silt zemine basalt fiber ilavesi denenen her durumda drenajsız kayma direncini
artırmış, en iyi iyileştirme 24 mm boyundaki fiberin %1.5 oranında zemine
karıştırıldığı durumda elde edilmiştir.

Keywords

Zemin iyileştirme, konsolide edilmiş doygun silt zemin, bazalt fiber, üç eksenli deney

Experimental Investigation of Mechanical Behavior of Basalt Fiber Reinforced Saturated Silty Soil

Abstract

In order to find solutions to the increasing environmental problems in
general and civil engineering in particular, several methods have been adopted.
For example, synthetic and natural materials are increasingly used for soil
improvement. In recent years, basalt fibers have been used for reinforcing
concrete. But it is difficult to find the articles on the use of basalt fibers
to strengthen the soil. It is in this perspective that this work is oriented on
the study of mechanical behavior of consolidated saturated silty soils
reinforced by basalt fibers. This study is conducted by using basalt fiber
which is a natural and non-polluting material to improve the mechanical and
physical properties of the soil by offering additional resistance to shear
strength. The study involves adding different percentages (1%, 1.5% and 2%) of
basalt fibers of different lengths of 6 mm, 12 mm and 24 mm in the silty soil.
To properly conduct this study, 40 triaxial undrained unconsolidated tests (UU)
were conducted on saturated silty soils which were consolidated under 100 kPa
vertical stress. The results of these tests show that the addition of the
basalt fiber has greatly enhanced the shear strength of the soil used in this
study. The best improvement is observed for basalt fiber at 1.5% and 24 mm
long. This improvement is expressed by an increase in the cohesion of this
soil.

Keywords

Soil improvement, consolidated saturated silty soil, basalt fiber, triaxial test

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