Effect of Inorganic Salt Solutions on the Consistency Limits of Two Clays

Seracettin ARASAN

Makale detayları

Effect of Inorganic Salt Solutions on the Consistency Limits of Two Clays

Yazarlar:

Seracettin ARASAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Engineering and Environmental Sciences 2008 Vol.32 Issue 2, pp.107-115

Belge Tipi:

Makale

Yayın Tarihi:

1/2008

Belge Dili:

Türkçe

Document ID (Org No.):

2000744863

Sıklık:

Üç Yıllık

eISSN:

1303-6157

pISSN:

1300-0160

Özet:

 

Due to its low permeability, a clay liner is the main  material used in solid waste disposal landfills.  It is exposed there  to various chemical, biological, and physical events, and the clay  liner is affected by the resulting leachate.  For this reason, when  attempting to define the geotechnical characteristics of clay liners,  the use of distilled water or tap water is far from being  representative of the in-situ conditions.  In this study, the effects  of 4 different salt solutions on the consistency limits of clays were  experimentally investigated.  The salt solutions used as leachate  compounds were ammonium chloride (NH4Cl), potassium chloride (KCl),  copper(II) sulfate (CuSO4), and iron(II) sulfate (FeSO4).  Consistency limit tests were conducted on low plasticity (CL-class)  and high plasticity (CH-class) commercial clays using both distilled  water and these salt solutions.  The experimental results indicated  that the liquid limit increased when the salt concentration for the CL  clay was increased.  Moreover, the liquid limit was found to decrease  when the salt concentration for the CH clay was increased.  The  plastic limit of the CL clay increased as the salt concentration  increased to a certain value.  However, the plastic limit of CH clay  decreased at low salt concentrations and increased at high salt  concentrations.  In addition, the test results indicated that salt  solutions at high concentrations changed the soil class of clays.  In  other words, for the conditions investigated, CL and CH class clays  were transformed into low plasticity silt (ML) and high plasticity  silt (MH) class soils, respectively, according to the Unified Soil  Classification System (USCS).

 

Due to its low permeability, a clay liner is the main  material used in solid waste disposal landfills.  It is exposed there  to various chemical, biological, and physical events, and the clay  liner is affected by the resulting leachate.  For this reason, when  attempting to define the geotechnical characteristics of clay liners,  the use of distilled water or tap water is far from being  representative of the in-situ conditions.  In this study, the effects  of 4 different salt solutions on the consistency limits of clays were  experimentally investigated.  The salt solutions used as leachate  compounds were ammonium chloride (NH4Cl), potassium chloride (KCl),  copper(II) sulfate (CuSO4), and iron(II) sulfate (FeSO4).  Consistency limit tests were conducted on low plasticity (CL-class)  and high plasticity (CH-class) commercial clays using both distilled  water and these salt solutions.  The experimental results indicated  that the liquid limit increased when the salt concentration for the CL  clay was increased.  Moreover, the liquid limit was found to decrease  when the salt concentration for the CH clay was increased.  The  plastic limit of the CL clay increased as the salt concentration  increased to a certain value.  However, the plastic limit of CH clay  decreased at low salt concentrations and increased at high salt  concentrations.  In addition, the test results indicated that salt  solutions at high concentrations changed the soil class of clays.  In  other words, for the conditions investigated, CL and CH class clays  were transformed into low plasticity silt (ML) and high plasticity  silt (MH) class soils, respectively, according to the Unified Soil  Classification System (USCS).

Makale detayları

Effect of Inorganic Salt Solutions on the Consistency Limits of Two Clays

Yazarlar: Seracettin ARASAN

Yayıncı: TUBITAK

Dergi: Turkish Journal of Engineering and Environmental Sciences 2008 Vol.32 Issue 2, pp.107-115

Belge Tipi: Makale

Yayın Tarihi: 1/2008

Belge Dili: Türkçe

Document ID (Org No.): 2000744863

Sıklık: Üç Yıllık

eISSN: 1303-6157

pISSN: 1300-0160

Sayı

Yazarlar:

Seracettin ARASAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Engineering and Environmental Sciences 2008 Vol.32 Issue 2, pp.107-115

Belge Tipi:

Makale

Yayın Tarihi:

1/2008

Belge Dili:

Türkçe

Document ID (Org No.):

2000744863

Sıklık:

Üç Yıllık

eISSN:

1303-6157

pISSN:

1300-0160