Y. Yilmaz
Gazi University
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Publication
Featured researches published by Y. Yilmaz.
Marine Georesources & Geotechnology | 2011
Murat Mollamahmutoğlu; Y. Yilmaz
This article investigates the penetrability of microfine cement suspensions prepared with Rheocem 900 with and without superplasticizer additive into various graded fine-to-medium sands into which chemical grout permeation is only possible. Initially, the basic rheological properties such as viscosity, setting time, and stability of microfine cement suspensions are studied. In addition, penetration performance of the suspensions into various graded fine to medium sand specimens under different grouting pressures is examined. Finally, the strength and permeability characteristics of various graded fine-to-medium sand specimens permeated with microfine cement suspensions are studied. It is found that a superplasticizer additive greatly increases the grouting performance of microfine cement and reduces the grouting pressure. Moreover, it is seen that the unconfined compressive strengths of sand specimens permeated with a cement grout without additive are slightly less than those of sand specimens permeated with cement grout and superplasticizer additive. Furthermore, permeability tests on specimens permeated with cement grouts with or without a superplasticizer reveals that all specimens are impermeable (k < 1 × 10−7 m/s).
Journal of Geotechnical and Geoenvironmental Engineering | 2009
Y. Yilmaz; Murat Mollamahmutoğlu
The liquefaction susceptibility of various graded fine to medium saturated sands are evaluated by stress controlled cyclic triaxial laboratory tests. Cyclic triaxial tests are performed on reconstituted specimens having global relative density of 60%. In all cyclic triaxial tests, loading pattern is selected as a sinusoidal wave form with 1.0 Hz frequency and effective consolidation pressure is chosen as 100 kPa. Liquefaction resistance is defined as the required cyclic stress ratio causing initial liquefaction in 10 cycles during the cyclic triaxial test. The results are used to draw conclusions on the effect of the extreme void ratios and void ratio range on the liquefaction resistance of various graded sands.
Environmental Earth Sciences | 2001
Murat Mollamahmutoğlu; Y. Yilmaz
Geosynthetics International | 2009
Y. Yilmaz
Engineering Geology | 2008
Y. Yilmaz; Murat Mollamahmutoğlu; Vehbi Ozaydin; Kamil Kayabali
Engineering Geology | 2013
Y. Yilmaz; Vehbi Ozaydin
Engineering Geology | 2015
Y. Yilmaz
Engineering Geology | 2009
Y. Yilmaz
Proceedings of the Institution of Civil Engineers - Geotechnical Engineering | 2010
Murat Mollamahmutoğlu; Y. Yilmaz
Uluslararası Mühendislik Araştırma ve Geliştirme Dergisi | 2009
Murat Mollamahmutoğlu; Y. Yilmaz; Ahmet Gürkan Güngör