Tekrarlı donma ve çözülmenin kireç ile stabilize edilmiş kil zeminlerin mukavemet ve permeabilitesine etkisi
Yükleniyor...
Tarih
2011
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Selçuk Üniversitesi Teknik Bilimler Meslek Yüksekokulu
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Killi zeminler, uzun ömürlü veya dayanıklı yolların inşasında önemli problemler ortaya çıkarır. İki ana problem, killerin büzülmesi ve şişmesi, bir dizi su koşulları altında malzeme özelliklerinin değişmesidir. Kildeki hacim değişimleri önemli olabilir, hacimsel değişimler yolun duraysızlığına, yol kaplamasının şeklinin bozulmasına, yolun kullanılışsız hale dönüşmesine neden olur. Kil zeminlerin diğer özelliği de kuru oldukları zaman taşıma güçlerinin yüksek olması, su muhtevalarının artması halinde plastisitesinin artarak taşıma gücünün azalmasıdır. Killi zeminlerin mühendislik özelliklerini iyileştirmek için bunların kireç ve çimento ile karıştırılması yöntemi özellikle karayolları ve hava meydanları alt yapıları için uzun süredir başarı ile uygulanmaktadır. Uygulamanın başarı derecesini belirleyen etkenlerin belli başlıları zemin cinsi, uygulama yöntemi, kür süresi, katkı malzemesi tip ve oranları, ekonomik kaygılar olarak sıralanabilir. Bu çalışmada donma ve çözülme gibi fiziksel olayların kireç ile stabilize edilmiş kil zeminlerin mukavemet ve permeabilitesine olan etkisi araştırılmıştır. Bu amaçla düşük ve yüksek plastisiteli iki sınıf kil literatürde belirlenen oranlarda kireç ve çimento ile stabilizasyona tabi tutulmuş, bu numuneler stabilize edilmeden ve edildikten sonra değişik sayıda donma-çözülme çevrimine maruz bırakılarak mukavemet ve permeabiliteleri belirlenmiştir.
Clay soils present unique problems to engineers in the construction of durable roads. The two principal concerns are shrinking and swelling of clays and changes in material properties under a range of moisture conditions. Volume change in clays can be significant and occur as the moisture content changes. Low-volume roads constructed on clays subgrades are a particular challenge to engineers because the volumetric changes cause instability of the road, resulting in an uneven pavement surface, detrimental cracking and ultimately, premature deterioration and replacement. Property changes of the clays are also problematic. When dry, clays are quite strong. However, as moisture increases, plasticity of the clay increases and strength decreases. Support of the pavement base layer by the clay subgrade is dramatically reduced because significant maintenance or premature road replacement is being a quite important problem. The method for improving the mechanical properties of clayey soils that are mixed with lime and cement has been successfully used in various field of construction such as subbase contruction of high ways and air fields. The main factors that effect the success of the application method used in also embankments, fills behind bridge abutments, soil exchange in sliding slopes are the type of soil considered, application method, curing time, percentage of additives and economical considerations. In this study, the effect of the physical events such as freezing and thawing to strength and permeability of soils which are stabilized with lime will be investigated. For this purpose, two class of clays (high and low plasticity clays) will be stabilized with lime described in literature. Before stabilization and after stabilized, the permeability and strength of specimens will be determined with various freeze-thaw cycles.
Clay soils present unique problems to engineers in the construction of durable roads. The two principal concerns are shrinking and swelling of clays and changes in material properties under a range of moisture conditions. Volume change in clays can be significant and occur as the moisture content changes. Low-volume roads constructed on clays subgrades are a particular challenge to engineers because the volumetric changes cause instability of the road, resulting in an uneven pavement surface, detrimental cracking and ultimately, premature deterioration and replacement. Property changes of the clays are also problematic. When dry, clays are quite strong. However, as moisture increases, plasticity of the clay increases and strength decreases. Support of the pavement base layer by the clay subgrade is dramatically reduced because significant maintenance or premature road replacement is being a quite important problem. The method for improving the mechanical properties of clayey soils that are mixed with lime and cement has been successfully used in various field of construction such as subbase contruction of high ways and air fields. The main factors that effect the success of the application method used in also embankments, fills behind bridge abutments, soil exchange in sliding slopes are the type of soil considered, application method, curing time, percentage of additives and economical considerations. In this study, the effect of the physical events such as freezing and thawing to strength and permeability of soils which are stabilized with lime will be investigated. For this purpose, two class of clays (high and low plasticity clays) will be stabilized with lime described in literature. Before stabilization and after stabilized, the permeability and strength of specimens will be determined with various freeze-thaw cycles.
Açıklama
URL: http://sutod.selcuk.edu.tr/sutod/article/view/88
Anahtar Kelimeler
Kireç stabilizasyonu, Serbest basınç mukavemeti, Permeabilite, Lime stabilization, Clay soils, Unconfined compression test, Permeability
Kaynak
Selçuk-Teknik Dergisi
WoS Q Değeri
Scopus Q Değeri
Cilt
10
Sayı
Künye
Soğancı, A. S., Yıldız, M. (2011). Tekrarlı donma ve çözülmenin kireç ile stabilize edilmiş kil zeminlerin mukavemet ve permeabilitesine etkisi. Selçuk-Teknik Dergisi, 10, (3), 259-270.
