Experimental Investigation of the Effect of Grain Size Distribution on CBR (%) Values

Murat Gülen; Suat Akbulut; Yaşar Kayan

Makale detayları

Experimental Investigation of the Effect of Grain Size Distribution on CBR (%) Values

Yazarlar:

Murat Gülen | Suat Akbulut | Yaşar Kayan

Yayıncı:

Dicle University

Ana Başlıklar:

İnşaat Geoteknik Mühendisliği | İnşaat Mühendisliğinde Zemin Mekaniği

Dergi:

Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi Vol.16 Issue 2, pp.493-502

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001352752

pISSN:

1309-8640

Anahtar kelimeler:

Özet:

 Various types of soil are widely used as fill materials in civil engineering applications. The physical and engineering properties of these materials are the primary parameters that determine their suitability for specific purposes. The performance and stability of structures depend largely on the design parameters of the fill material and the accurate prediction of how these parameters may change over the life of the structure. This study aims to experimentally investigate the effects of swelling potential, liquid limit, mean grain size and clay content of soils on the California bearing ratio CBR . For this purpose, seven different soil samples were prepared by adding different proportions of sand and gravel to a fine-grained, low plasticity kaolinite clay, resulting in soils with different grain size distributions and consistency properties. The samples were compacted to their optimum moisture content and maximum dry unit weight and then subjected to CBR tests under both dry and water-saturated conditions after 96 hours of soaking. The CBR  values obtained from both conditions were compared and the ΔCBR  changes were calculated. The experimental findings showed that the change in CBR  values was significantly influenced by the swelling amount, liquid limit, mean grain size, and clay content. In particular, swelling caused a decrease in CBR  values ranging from 25 to 63. These results indicate that the swelling potential of soils has a significant effect on their CBR  performance.

 Various types of soil are widely used as fill materials in civil engineering applications. The physical and engineering properties of these materials are the primary parameters that determine their suitability for specific purposes. The performance and stability of structures depend largely on the design parameters of the fill material and the accurate prediction of how these parameters may change over the life of the structure. This study aims to experimentally investigate the effects of swelling potential, liquid limit, mean grain size and clay content of soils on the California bearing ratio CBR . For this purpose, seven different soil samples were prepared by adding different proportions of sand and gravel to a fine-grained, low plasticity kaolinite clay, resulting in soils with different grain size distributions and consistency properties. The samples were compacted to their optimum moisture content and maximum dry unit weight and then subjected to CBR tests under both dry and water-saturated conditions after 96 hours of soaking. The CBR  values obtained from both conditions were compared and the ΔCBR  changes were calculated. The experimental findings showed that the change in CBR  values was significantly influenced by the swelling amount, liquid limit, mean grain size, and clay content. In particular, swelling caused a decrease in CBR  values ranging from 25 to 63. These results indicate that the swelling potential of soils has a significant effect on their CBR  performance.

 Various types of soil are widely used as fill materials in civil engineering applications. The physical and engineering properties of these materials are the primary parameters that determine their suitability for specific purposes. The performance and stability of structures depend largely on the design parameters of the fill material and the accurate prediction of how these parameters may change over the life of the structure. This study aims to experimentally investigate the effects of swelling potential, liquid limit, mean grain size and clay content of soils on the California bearing ratio CBR . For this purpose, seven different soil samples were prepared by adding different proportions of sand and gravel to a fine-grained, low plasticity kaolinite clay, resulting in soils with different grain size distributions and consistency properties. The samples were compacted to their optimum moisture content and maximum dry unit weight and then subjected to CBR tests under both dry and water-saturated conditions after 96 hours of soaking. The CBR  values obtained from both conditions were compared and the ΔCBR  changes were calculated. The experimental findings showed that the change in CBR  values was significantly influenced by the swelling amount, liquid limit, mean grain size, and clay content. In particular, swelling caused a decrease in CBR  values ranging from 25 to 63. These results indicate that the swelling potential of soils has a significant effect on their CBR  performance.

 İnşaat mühendisliği uygulamalarında, farklı zemin türleri dolgu malzemesi olarak yaygın şekilde kullanılmaktadır. Bu malzemelerin fiziksel ve mühendislik özellikleri, kullanım amacını belirleyen başlıca parametrelerdir. Yapıların performansı ve stabilitesi, dolgu malzemesine ait tasarım parametrelerinin ve bu parametrelerin yapının hizmet süresi boyunca göstereceği değişimin doğru bir şekilde öngörülmesine bağlıdır. Bu çalışma, zeminlerin şişme miktarının, likit limitinin, ortalama dane çapının ve kil oranının California taşıma oranı CBR  üzerindeki etkilerini deneysel olarak ortaya koymayı amaçlamaktadır. Bu kapsamda, ince daneli ve düşük plastisiteli bir kile, farklı oranlarda kum ve çakıl ilave edilerek, farklı dane çapı dağılımı ve kıvam özelliklerine sahip yedi zemin numunesi hazırlanmıştır. Hazırlanan numuneler, optimum su muhtevası ve maksimum birim hacim ağırlıkta sıkıştırılarak hem kuru hem de 96 saat suda bekletilerek suya doygun hale getirildikten sonra CBR deneylerine tabi tutulmuştur. Her iki koşulda elde edilen CBR  değerleri karşılaştırılmış ve ΔCBR  değişimleri hesaplanmıştır. Deneysel veriler, CBR  değerlerindeki değişimin şişme miktarı, likit limit, ortalama dane çapı ve kil oranına bağlı olarak farklılık gösterdiğini ortaya koymuştur. Özellikle şişme miktarına bağlı olarak CBR  değerlerinde 25 ile 63 arasında azalma gözlemlenmiştir. Bu bulgular, zeminlerin şişme potansiyelinin CBR  üzerinde önemli bir etkiye sahip olduğunu göstermektedir.

Makale detayları

Experimental Investigation of the Effect of Grain Size Distribution on CBR (%) Values

Yazarlar:

Murat Gülen | Suat Akbulut | Yaşar Kayan

Yayıncı:

Dicle University

Ana Başlıklar:

İnşaat Geoteknik Mühendisliği | İnşaat Mühendisliğinde Zemin Mekaniği

Dergi:

Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi Vol.16 Issue 2, pp.493-502

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001352752

pISSN:

1309-8640

Grain size distribution 1

CBR (%) 2

swelling 3

liquid limit 4

clay content 5Dane çapı dağılımı 1

CBR (%) 2

şişme 3

likit limit 4

kil oranı 5

Sayı

Makale detayları

Yazarlar: Murat Gülen | Suat Akbulut | Yaşar Kayan

Yayıncı: Dicle University

Ana Başlıklar: İnşaat Geoteknik Mühendisliği | İnşaat Mühendisliğinde Zemin Mekaniği

Dergi: Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi Vol.16 Issue 2, pp.493-502

Belge Tipi: Makale

Yayın Tarihi: 6/2025

Belge Dili: Türkçe

Document ID (Org No.): 2001352752

pISSN: 1309-8640

Sayı

Yazarlar:

Murat Gülen | Suat Akbulut | Yaşar Kayan

Yayıncı:

Dicle University

Ana Başlıklar:

İnşaat Geoteknik Mühendisliği | İnşaat Mühendisliğinde Zemin Mekaniği

Dergi:

Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi Vol.16 Issue 2, pp.493-502

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001352752

pISSN:

1309-8640