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Dive into the research topics where Y. Yilmaz is active.

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Featured researches published by Y. Yilmaz.


Marine Georesources & Geotechnology | 2011

Engineering Properties of Medium-to-Fine Sands Injected with Microfine Cement Grout

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

Characterization of Liquefaction Susceptibility of Sands by Means of Extreme Void Ratios and/or Void Ratio Range

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

Potential use of fly ash and bentonite mixture as liner or cover at waste disposal areas

Murat Mollamahmutoğlu; Y. Yilmaz


Geosynthetics International | 2009

Experimental investigation of the strength properties of sand–clay mixtures reinforced with randomly distributed discrete polypropylene fibers

Y. Yilmaz


Engineering Geology | 2008

Experimental investigation of the effect of grading characteristics on the liquefaction resistance of various graded sands

Y. Yilmaz; Murat Mollamahmutoğlu; Vehbi Ozaydin; Kamil Kayabali


Engineering Geology | 2013

Compaction and shear strength characteristics of colemanite ore waste modified active belite cement stabilized high plasticity soils

Y. Yilmaz; Vehbi Ozaydin


Engineering Geology | 2015

Compaction and strength characteristics of fly ash and fiber amended clayey soil

Y. Yilmaz


Engineering Geology | 2009

A study on the limit void ratio characteristics of medium to fine mixed graded sands

Y. Yilmaz


Proceedings of the Institution of Civil Engineers - Geotechnical Engineering | 2010

Pre- and post-cyclic loading strength of silica-grouted sand

Murat Mollamahmutoğlu; Y. Yilmaz


Uluslararası Mühendislik Araştırma ve Geliştirme Dergisi | 2009

Effect of a Class C Fly Ash on the Geotechnical Properties of an Expansive Soil

Murat Mollamahmutoğlu; Y. Yilmaz; Ahmet Gürkan Güngör

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