Tahir GÖNEN

Article | 2018 | Construction and Building Materials177

Millions of tires are discarded every year. Disposal or recycling-reusing of waste tire rubber has become a big environmental problem in the world. In this study, it was aimed to determine the freezing-thawing, impact resistance, compressive strength and capillary water absorption rate, when the granulated waste rubber parts are used in the non-load-bearing concrete. Granulated crumb rubbers obtained from waste tires were used at two different grain diameters of 1 and 2 mm as the maximum value. A total of 9 different series were prepared, one of them being the control group and the others being changed with the aggregate in the rati . . .os of 0.5%, 1%, 2% and 4%. In all of the blends, the water/cement ratio was kept constant at 0.50. A drop-weight type impact test was applied to the specimens produced with and without waste rubbers. The impact energy required for the first crack and final dent was determined with the free-falling steel ball at a certain height. Freezing thawing experiments were carried out on the samples with 3% NaCl solution ponded on the surface, and weight losses were determined. As the result, significant improvements were observed in the freezing-thawing and impact resistances of waste tire added samples. Weight loss of specimens because of the freezing-thawing was decreased about 90% and impact resistance was increased different rate depending using rate. (C) 2018 Elsevier Ltd. All rights reserve More less

Mustafa Haluk ÇELİK | Mahmut DURMAZ

Article | 2012 | European Journal of Scientific Research78 ( 4 )

The aim of this study is to search some mechanical features of polypropylene fibre mixed adobe. As fibre additive polypropylene, in proportions of 0%, 5%, 10%, 15%, soil with 26% clay and 7 kg straw per cubic meter were mixed and mixture with adobe was prepared. As a result the compressive strengths of the polypropylene fibre mixed samples were determined as 40 kgf/cýrf in %0, 26.55 kgf/cm in 5%, 31.62 kgf/cm2 in 10%,37.35 kgf/cm2 in 15%; tensile strengths as 13.76 kgf/cm2 in 0%, 45.80 kgf/cm2 in 5%, 46.90 kgf/cm2 in 10%, 47.20 kgf/cm2 in 15%; heat conduction values as 0.58 kcal/mh°c in 0%, 0.56 kcal/mh°c in 5%, 0.53 kcal/mh°c in 10 . . .%, 0.52 kcal/mh°c in 15%. As it is understood from the results, it is seen that the polypropylene fibre increases the compressive and tensile strength of the adobe and does not change the heat conduction values. © EuroJournals Publishing, Inc. 2012 More less

Mustafa Haluk ÇELİK | Mahmut VURAL

Article | 2012 | Contemporary Engineering Sciences5 ( 6 )

In this study, usability and resistance of silica fume in the manufacture of adobe by mixing silica fume in certain proportions with the material used in the manufacture of adobe was investigated. For this purpose, a certain amount of cement with no or some silica fume content was added to adobe. Three bricks were prepared with each of the cement added mixtures containing 0, 5, 10, and 15% (wsilica fume/wcement) silica fume. The prepared samples were tested to determine compressive strength, water resistance, and wind resistance. For the wind resistance tests, the bricks were painted with either plastic paint or lime. The results of . . . the experiments showed that the silica fume substitution can be said to increase compressive strength and water resistance. However, the wind resistance values were not changed in the samples painted with plastic paint. The samples painted with lime showed visible capillary cracks, and partial spills occurred. - Keywords: Silica Fume, Adob More less

Mustafa Haluk ÇELİK | Mahmut DURMAZ

Article | 2012 | Contemporary Engineering Sciences5 ( 6 )

In this study, it was tried to obtain bearing concrete by using the pumice and perlite aggregates in certain proportions. Different cement dosages were used in every mixture poured with portland cement and portland composite cement, the 60% pumice and 40% perlite aggregates of which were kept stable. The silica fume was added as much as 10% of cement amount in mixture. Mixtures from 200 to 500 doses were made and poured with every type of cement. The prepared samples left to water cure and their 7 and 28 days compressive strengths were determined. The test results indicated that the mixtures poured with portland cement has a higher . . .compressive strength than those poured with portland composite strength. While the concretes poured with portland composite cement up to 500 doses can be used only insulation, the concretes poured with portland cement at 450 doses and above show the characteristics of side bearing concrete. – Keywords: perlite, pumice, concrete, portland cement, composite cement, compressive strength, silica fum More less

Tahir GÖNEN

Article | 2022 | Matéria (Rio de Janeiro)27 ( 3 )

As the urban population increases and the level of social life advances, the amount of wastewater originating from houses, institutions and industries increases as well. It is necessary for the infrastructure systems in settlements to be sustained under healthy conditions. Since the subsequent repair of infrastructure systems is difficult, appropriate selection of the materials used in these systems is of importance. Concrete pipes are widely used in sewerage systems. In the present study, it was aimed to improve the biological corrosion resistance of concrete pipes via coating with various materials. For this purpose, firstly morta . . .r samples were coated with epoxy, crystalline insulation mortar, and polyester. Finally this specimens subjected to 0.1, 0.5, 1, and 1.5 mol sulfuric acid solutions for 7, 14, 21, 28, 35, and 42 days. It was observed that the coating materials significantly improved the biological corrosion performances of the mortar samples More less

Tahir GÖNEN

Article | 2018 | Arabian Journal for Science and Engineering43 ( 10 )

This paper introduces an experimental research about the influences of the curing type on accelerated carbonation, capillary water absorption and permeability of a range of different self-compacting lightweight concrete (SCLC) mixtures in comparison with those of chosen conventional vibrated lightweight concrete (LC) and self-compacting concrete (SCC). Seven different concrete compositions are considered: four SCLC, two SCC and one LC mixtures. All of the SCLC mixtures and one of the SCC and one LC mixture with a constant powder dosage of 550 kg/m(3) was designed to be containing 440 kg/m(3) of cement and 110 kg/m(3) of fly ash. The . . . other SCC mix was designed to have lower cement dosage for similar strength characteristic. Basaltic pumice aggregate of the SCLC was replaced with expanded perlite aggregate by 10, 20 and 30%. All mixtures were cured by two different curing types. Among the permeability properties of the samples, permeability, capillary water absorption and carbonation properties were measured. The results showed that the production of SCLC mixture as the result of the use of basaltic pumice and expanded perlite seems to be possible. The density of SCLC with basaltic pumice and expanded perlite was about 1900 kg/m(3), while the density of SCC was 2300 kg/m(3). Generally, permeation properties of SCLC such as carbonation and capillary water absorption got worse, since the porous aggregate was used. However, SCLC's compressive strength per density was more efficient than SCC's More less