7 results on '"Sivrikaya, Osman"'
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2. Models of compacted fine-grained soils used as mineral liner for solid waste
- Author
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Sivrikaya, Osman
- Published
- 2008
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3. Models of compacted fine-grained soils used as mineral liner for solid waste.
- Author
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Sivrikaya, Osman
- Subjects
SANITARY landfill linings ,SOILS ,SILT ,SEALS (Closures) ,MATERIAL plasticity ,HYDROLOGIC models ,SOIL compaction ,ELASTICITY ,HYDROGEOLOGY ,RHEOLOGY - Abstract
To prevent the leakage of pollutant liquids into groundwater and sublayers, the compacted fine-grained soils are commonly utilized as mineral liners or a sealing system constructed under municipal solid waste and other containment hazardous materials. This study presents the correlation equations of the compaction parameters required for construction of a mineral liner system. The determination of the characteristic compaction parameters, maximum dry unit weight ( γ
dmax ) and optimum water content ( wopt ) requires considerable time and great effort. In this study, empirical models are described and examined to find which of the index properties correlate well with the compaction characteristics for estimating γdmax and wopt of fine-grained soils at the standard compactive effort. The compaction data are correlated with different combinations of gravel content ( G), sand content ( S), fine-grained content (FC = clay + silt), plasticity index ( Ip ), liquid limit ( wL ) and plastic limit ( wP ) by performing multilinear regression (MLR) analyses. The obtained correlations with statistical parameters are presented and compared with the previous studies. It is found that the maximum dry unit weight and optimum water content have a considerably good correlation with plastic limit in comparison with liquid limit and plasticity index. [ABSTRACT FROM AUTHOR]- Published
- 2007
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4. Recycling waste from natural stone processing plants to stabilise clayey soil
- Author
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Osman Sivrikaya, Koray R. Kıyıldı, Zeki Karaca, 0-Belirlenecek, and [Sivrikaya, Osman -- Kiyildi, Koray R.] Nigde Univ, Dept Civil Engn, TR-51240 Nigde, Turkey -- [Karaca, Zeki] Nigde Univ, Dept Min Engn, TR-51240 Nigde, Turkey
- Subjects
Soil test ,Compaction ,Soil Science ,Natural stone plant wastes ,Silt ,engineering.material ,Environmental Chemistry ,Kaolinite ,Index properties ,Water content ,Earth-Surface Processes ,Water Science and Technology ,Lime ,Global and Planetary Change ,Waste management ,Natural stone ,Geology ,Pulp and paper industry ,Pollution ,6. Clean water ,Bentonite ,engineering ,Clay ,Environmental science ,Stabilisation - Abstract
WOS: 000334913500011, For the countries with a developed stone industry the waste generated in the natural stone processing plants pose environmental and economic problems. The utilisation of stone waste in various areas is still under research. In addition, there are only a limited number of studies concerning the use of stone waste obtained from processing plants in the stabilisation of clayey soil. Furthermore, none of the studies in the literature investigated the effect of the characteristics of the stone on the stabilisation of the soil. This is the first study that compares the efficiency of the waste calcitic marble, dolomitic marble and granite powder as additives for the stabilisation of clayey soil. Artificial soil samples were prepared in the laboratory using bentonite and kaolinite. Natural stone waste powder was added to the soil samples at different percentages, and the index and compaction parameters of the stabilised soil were analysed. The results showed that the types of waste powder used in this study, like lime, could be used as stabilisers. As the percentage of additives increased, the plasticity index of the clayey soil decreased and the physical properties of the soil changed from clay to silt. In terms of compaction parameters, the use of all types of natural waste powder in the study resulted in a decrease in the optimum water content and an increase in the maximum dry unit weight. The lowest optimum water content and the highest maximum dry unit weight were obtained from the dolomitic marble powder., Nigde University Scientific Research Projects Unit; Nigde University [FEB 2010/33], This study is supported by Nigde University Scientific Research Projects Unit. This paper is partly benefited from the FEB 2010/33 project of Nigde University. The authors would like to thank Nigde University Scientific Research Projects Unit and the Nigde NIDAS Company for allowing them to use the laser diffraction device.
- Published
- 2013
5. PREDICTION OF THE COMPACTION PARAMETERS FOR COARSE-GRAINED SOILS WITH FINES CONTENT BY MLR AND GEP
- Author
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Sivrikaya, O., Kayadelen, C., Erdal Emre Cecen, 0-Belirlenecek, and [Sivrikaya, Osman] Nigde Univ, Dept Civil Engn, TR-51240 Nigde, Turkey -- [Kayadelen, Cafer] Kahramanmaras Sutcuimarn Univ, Dept Civil Engn, Kahramanmaras, Turkey -- [Cecen, Emre] Fatih Univ, Dept Civil Engn, TR-34500 Istanbul, Turkey
- Subjects
coarse-grained soils ,compaction ,GEP ,MLR - Abstract
WOS: 000332263000004, The determination of the compaction parameters of soils, the maximum dry unit weight (gamma(dmax)) and the optimum water content (w(opt)), at various compaction energy (E) levels is an important process. The aim of this study is to develop correlations in order to estimate the compaction parameters dependent on the compaction energy for coarse-grained soils with various fines contents on which limited studies exist in the literature. Genetic Expression Programming (GEP) and Multi Linear Regression (MLR) analyses are used in the derivation of the correlations for the prediction of gamma(dmax) and w(opt) obtained from Standard Proctor (SP) and Modified Proctor (MP) tests with the index properties of coarse-grained soils with various fines contents. To develop the models, a total of 86 data sets collected from university laboratories in Turkey and six parameters, such as gravel content (G %), sand content (S %), fines content (FC %), liquid limit (w(L) %) and plasticity index (I-P %) of fines content and compaction energy (E Joule), are used. The performance of the models is comprehensively examined using several statistical verification tools. The results revealed that the GEP and MLR models are fairly promising approaches for the prediction of the maximum dry unit weight and the optimum water content of cohesionless soils with various fines contents at SP and MP compaction energy levels. The proposed correlations are reasonable ways to estimate the compaction parameters for the preliminary design of a project where there are financial and time limitations.
- Published
- 2013
6. Models of compacted fine-grained soils used as mineral liner for solid waste
- Author
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Osman Sivrikaya, Nigde Univ, Geotech Engn Div, Dept Civil Engn, TR-51245 Nigde, Turkey, and Sivrikaya, Osman
- Subjects
General Engineering ,Compaction ,fine-grained soils ,Silt ,Atterberg limits ,mineral liner ,Hydraulic conductivity ,correlations ,Soil water ,Earth and Planetary Sciences (miscellaneous) ,General Earth and Planetary Sciences ,Environmental Chemistry ,Geotechnical engineering ,compaction ,Water content ,Groundwater ,Geology ,General Environmental Science ,Water Science and Technology ,Waste disposal - Abstract
WOS: 000252276100021, To prevent the leakage of pollutant liquids into groundwater and sublayers, the compacted fine-grained soils are commonly utilized as mineral liners or a sealing system constructed under municipal solid waste and other containment hazardous materials. This study presents the correlation equations of the compaction parameters required for construction of a mineral liner system. The determination of the characteristic compaction parameters, maximum dry unit weight (gamma(dmax)) and optimum water content (w(opt)) requires considerable time and great effort. In this study, empirical models are described and examined to find which of the index properties correlate well with the compaction characteristics for estimating gamma(dmax) and w(opt) of fine-grained soils at the standard compactive effort. The compaction data are correlated with different combinations of gravel content (G), sand content (S), fine-grained content (FC = clay + silt), plasticity index (I-p), liquid limit (w(L)) and plastic limit (w(P)) by performing multilinear regression (MLR) analyses. The obtained correlations with statistical parameters are presented and compared with the previous studies. It is found that the maximum dry unit weight and optimum water content have a considerably good correlation with plastic limit in comparison with liquid limit and plasticity index.
- Published
- 2008
7. Estimating compaction behavior of fine-grained soils based on compaction energy
- Author
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Osman Sivrikaya, Cafer KayadelenC. Kayadelen, Ergun Togrol, [Sivrikaya, Osman -- Kayadelen, Cafer] Nigde Univ, Div Geotech Engn, Dept Civil Engn, TR-51100 Nigde, Turkey -- [Togrol, Ergun] Istanbul Univ, Dept Civil Engn, Div Geotech Engn, TR-34320 Istanbul, Turkey, and 0-Belirlenecek
- Subjects
Standard sample ,compaction energy ,Engineering geology ,ground improvement ,Compaction ,Context (language use) ,fine-grained soils ,Geotechnical Engineering and Engineering Geology ,soil compaction ,correlations ,Soil compaction ,Soil water ,Environmental science ,Geotechnical engineering ,Water content ,Energy (signal processing) ,Civil and Structural Engineering - Abstract
WOS: 000257138100010, For successful designs of geotechnical structures, rational determination of the engineering properties of soils is an important process. In this context, compaction parameters, maximum dry unit weight (gamma(dmax)), and optimum water content (w(opt)) are required to be determined at various compaction energies. This paper proposes correlation equations that relate gdmax and wopt obtained from standard Proctor (SP) and modified Proctor ( MP) tests to the index properties. To develop accurate relations, the data collected from the literature and the authors' own database have been used. It has been found that while wopt has the best correlation with plastic limit (w(p)), gamma(dmax) can be estimated more accurately from w(opt) than it can from w(p). In addition, the empirical methods including compaction energy (E) are described for estimating w(opt) and gamma(dmax) of fine-grained soils. The variables of the developed models for wopt and gamma(dmax) are w(p), E, and w(opt). It has been shown that the proposed correlations including the compaction energy will be useful for a preliminary design of a project where there is a financial constraint and limited time.
- Published
- 2008
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