Browsing by Author "Donmez, Senayi"

Now showing 1 - 4 of 4

Citation - WoS: 5
Citation - Scopus: 7
Clay Content Effects on Triaxial Swelling Characteristics of Clay-Bearing Samples
(Sila Science, 2012) Bilir, M. Erdinc; Sari, Y. Dursun; Muftuoglu, Yadigar V.; Donmez, Senayi; Department of Civil Engineering
There are some factors which have an important influence on the swelling characteristics of clay-bearing structures such as type of clay mineral, clay content, stress path, confinement, and scale effect. This paper includes a study of some of these factors of a reconstituted clay-bearing rock samples using a computer-controlled triaxial swelling test apparatus. According to the test results, almost the same swelling potential and stress are observed for the samples having the same density, diameter/height ratio, smectite content, and a confining pressure. On the other hand, the smectite content and confining pressure have a significant influence on the swelling behavior.
A DIGITAL IMAGE ANALYSIS BASEDSURFACE POLISH MEASUREMENT SYSTEM
(Pamukkale Univ, 2005) Donmez, Senayi; Sari, Y. Dursun
Because marble and natural rocks have been used widely for ornamental purposes, rubbing-polishing process also became important. One of the factors determining the quality of natural rocks is surface polish. The degree of surface polish is determined by qualitative definitions based on experiences in the plants natural rocks are processed. In this study, a digital image analysis based surface polish measurement system which measures surface polish systematically was developed and its validity and suitability were investigated by making experiments on a natural rock sample.
Citation - WoS: 13
Citation - Scopus: 23
Numerical Analysis of a Tunnel Support Design in Conjunction With Empirical Methods
(Asce-amer Soc Civil Engineers, 2008) Sari, Yasin Dursun; Pasamehmetoglu, A. Gunhan; Cetiner, Erkan; Donmez, Senayi
In this paper, preliminary support design of a tunnel was analyzed by numerical and empirical approaches. The case study for this analysis is a tunnel to be constructed on the Bilecik-Istanbul roadway in Turkey. The rock mass properties of the tunnel route and design support recommendations were obtained by using an empirical approach. The rock mass properties obtained from the empirical method were used as input parameters for the numerical analysis. The empirical and numerical results, in terms of support design, were evaluated. It was seen that the numerical analysis results supported by empirical values were logical and reliable.
Citation - WoS: 136
Citation - Scopus: 171
Re-Usage of Waste Foundry Sand in High-Strength Concrete
(Pergamon-elsevier Science Ltd, 2010) Guney, Yucel; Sari, Yasin Dursun; Yalcin, Muhsin; Tuncan, Ahmet; Donmez, Senayi
In this study, the potential re-use of waste foundry sand in high-strength concrete production was investigated. The natural fine sand is replaced with waste foundry sand (0%, 5%, 10%, and 15%). The findings from a series of test program has shown reduction in compressive and tensile strengths, and the elasticity modulus which is directly related to waste foundry inclusion in concrete. Nevertheless the concrete with 10% waste foundry sand exhibits almost similar results to that of the control one. The slump and the workability of the fresh concrete decreases with the increase of the waste foundry sand ratio. Although the freezing and thawing significantly reduces the mechanical and physical properties of the concrete. The obtained results satisfies the acceptable limits set by the American Concrete Institute (Ad). (C) 2010 Elsevier Ltd. All rights reserved.