Salih Taner YILDIRIM | Kocaeli University (original) (raw)

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Papers by Salih Taner YILDIRIM

International Journal of Pavement Engineering

European Journal of Environmental and Civil Engineering

Using recycled aggregates in the concrete offers advantages in many areas such as waste manageme... more Using recycled aggregates in the concrete offers advantages in many areas such as
waste management, energy save and natural resources, conservation of ecological balance, low CO2 emissions, and users are encouraged in this regard to use these materials. In this study, the profit / loss account arising in the structural design phase was investigated when Reclaimed Asphalt Pavement (RAP), which is limited to use in Roller Compacted Concrete (RCC) pavements, was used as coarse aggregate. RAP materials were used as coarse aggregates by the levels of 0%, 15% and 20% and mechanical properties such as compressive strength, flexural strength, splitting tensile strength and modulus of elasticity were investigated. In the last stage,
the mechanical properties obtained from these experimental studies were entered into
KENSLABS software as input, and the slab layer thicknesses were determined according to three different subgrade conditions and a certain fatigue criterion. According to the results, it has been determined that the use of RAP at a level of 20% is a serious reducing effect on mechanical properties and and the use of RAP at a level of 15% does not bring a great economic benefit but it is reasonable to use it as coarse aggregate in RCC mixes in consideration of environmental effects.

An environmentally friendly approach to the disposal of waste materials, a difficult issue to cop... more An environmentally friendly approach to the disposal of waste materials, a difficult issue to cope with in today's world, would only be possible through a useful recycling process. Floor tile waste aggregates (FTWA) in concrete applications can substantially reduce the negative environmental effects and exhaustion of the natural resources. In order to reuse and so to reduce the volume of the ceramic waste which occurs during the production of ceramic, it is possible to use as aggregates in the production of concrete. In this study, the mechanical and physical properties of concrete produced from floor tile waste aggregates were investigated. C30/37 quality concrete was produced by using two different floor tile waste. The properties of these concretes were compared to produced reference concrete. These results of the tests show that the concrete produced from floor tile waste has some more better physical and mechanical characteristics than conventional concrete, thus a new application area to selective recycling of ceramic floor tile waste and its use in the production of concrete.

Solid wastes are important environmental problem all over the World. Consumption of the plastic s... more Solid wastes are important environmental problem all over the World. Consumption of the plastic solid waste covers big portion within the total solid waste. Although a numerous plastic material is subjected to the recycling process, it is not easy to be destroyed by nature. One of the recommended way to prevent is to utilize as an aggregate in cement-based material. There are many researches on use of recycling rubber in concrete. However, studies on recycling of waste electrical cable rubber (WECR) in concrete is insufficient although there are many research on waste tyre rubbers in concrete. In this study, fine aggregate was replaced with WECR which were 5%, 10%, and 15 % of the total aggregate volume in the concrete and researched workability, unit weight, water absorption, compressive strength, flexural strength, ultrasonic pulse velocity, modulus of elasticity, and abrasion resistance of concrete. As a result of experimental studies, increase of WECR amount in concrete increases workability due to lack of adherence between cement paste and WECR, and hydrophobic structure of WECR while it influences negatively mechanical properties of concrete. It is possible to use WECR in concrete taking into account the reduction in mechanical properties.

The 1999 Kocaeli earthquake that shook Marmara Region, caused immense loss of life and property, ... more The 1999 Kocaeli earthquake that shook Marmara Region, caused immense loss of life and property, damaged the social and economic structures of this country in a nearly irreparable way, and found its way into the earthquake chapter of history books. It was etched in the people's mind due to the fact that it was the biggest earthquake of the near past in terms of magnitude and it devastated a huge area, thousands of people and the second biggest industrial zone of this country; it was also the first earthquake that led the public to be aware of the phenomenon of earthquake, the authorities to consider scientific studies important, the public to question the relevant measures, and to a large-scale rebuilding process in the aftermath. This study focuses on impacts of earthquakes on buildings and settlements situated within the province of Kocaeli where population increased due to the industrial and urbanization developments that were started in the 1950s and where construction projects were intensively built to meet housing demands of ever-growing population, and evaluates the measures taken after the said.

Construction and Building Materials, 2015

Recycled fine aggregates with saturation degrees of 0%, 50% and 100% were studied. Effect of inte... more Recycled fine aggregates with saturation degrees of 0%, 50% and 100% were studied. Effect of internal curing on recycled aggregate concrete was evaluated. RCA had properties comparable to that of virgin aggregate due to internal curing.

firat.edu.tr

Özet: Bu çalışmada, polipropilen, cam ve çelik lifli betonların dona dayanıklılıkları araştırılmı... more Özet: Bu çalışmada, polipropilen, cam ve çelik lifli betonların dona dayanıklılıkları araştırılmıştır. Deneyler için, lifsiz, polipropilen, cam, çelik ve karışık lifli 12 farklı beton üretilmiştir. Beton karışımında mikro yapılı çapı 50 µ, boyut oranı 400 polipropilen ve çapı 14 µ, boyut oranı 857 olan cam lifler ile makro yapılı çapı 0.75 mm, boyut oranı 80 olan çelik lifler kullanıldı. %0.5, 0.75 ve %1 hacimsel oranında çelik lifler, beton içinde %0.1 hacimsel oranında polipropilen ve cam liflerle karışık ve ayrı ayrı kullanıldı. Deneyler ASTM C 666 standardından havada hızlı donma-çözülme koşulları dikkate alınarak yapılmıştır. 30 donma-çözülme çevrimi sonucunda hazırlanan numuneler üzerinde ağırlık kaybı, ultrases geçiş hızı ve dayanıklılık faktörü değerleri belirlenmiştir. Deney sonuçları, betonda kullanılan lif tipine göre değerler arasında önemli farklılıklar olduğunu göstermiştir.

Books by Salih Taner YILDIRIM

In this study, the effects on the mechanical and durability properties of concrete with cathode r... more In this study, the effects on the mechanical and durability properties of concrete with cathode ray tube glass sand (CRTS) obtained by recycling the screens of cathode ray tubes (CRTs) were investigated. CRTS was used by the ratios of 5, 10, 15, and 20% in the concrete. The unit weight, workability, water absorption, compressive strength, flexural strength, ultrasonic pulse velocity, static and dynamic elastic moduli, abrasion resistance, and alkali-silica reaction (ASR) expansion tests on the concrete were examined. The use of CRTS improved specific properties of concrete according to the fraction of glass aggregate used between 0 and 20%. Plain concrete (P) and CRTS of 5% in concrete gave better results in terms of mechanical properties. Use of CRTS above 5% in concrete declined the mechanical properties but on the 90th day, CRTS concrete reduced the difference. CRTS up to 20% in concrete especially improved abrasion resistance in comparison to P without CRTS; furthermore, this addition did not increase ASR expansion to a deleterious level.

International Journal of Pavement Engineering

European Journal of Environmental and Civil Engineering

Using recycled aggregates in the concrete offers advantages in many areas such as waste manageme... more Using recycled aggregates in the concrete offers advantages in many areas such as
waste management, energy save and natural resources, conservation of ecological balance, low CO2 emissions, and users are encouraged in this regard to use these materials. In this study, the profit / loss account arising in the structural design phase was investigated when Reclaimed Asphalt Pavement (RAP), which is limited to use in Roller Compacted Concrete (RCC) pavements, was used as coarse aggregate. RAP materials were used as coarse aggregates by the levels of 0%, 15% and 20% and mechanical properties such as compressive strength, flexural strength, splitting tensile strength and modulus of elasticity were investigated. In the last stage,
the mechanical properties obtained from these experimental studies were entered into
KENSLABS software as input, and the slab layer thicknesses were determined according to three different subgrade conditions and a certain fatigue criterion. According to the results, it has been determined that the use of RAP at a level of 20% is a serious reducing effect on mechanical properties and and the use of RAP at a level of 15% does not bring a great economic benefit but it is reasonable to use it as coarse aggregate in RCC mixes in consideration of environmental effects.

An environmentally friendly approach to the disposal of waste materials, a difficult issue to cop... more An environmentally friendly approach to the disposal of waste materials, a difficult issue to cope with in today's world, would only be possible through a useful recycling process. Floor tile waste aggregates (FTWA) in concrete applications can substantially reduce the negative environmental effects and exhaustion of the natural resources. In order to reuse and so to reduce the volume of the ceramic waste which occurs during the production of ceramic, it is possible to use as aggregates in the production of concrete. In this study, the mechanical and physical properties of concrete produced from floor tile waste aggregates were investigated. C30/37 quality concrete was produced by using two different floor tile waste. The properties of these concretes were compared to produced reference concrete. These results of the tests show that the concrete produced from floor tile waste has some more better physical and mechanical characteristics than conventional concrete, thus a new application area to selective recycling of ceramic floor tile waste and its use in the production of concrete.

Solid wastes are important environmental problem all over the World. Consumption of the plastic s... more Solid wastes are important environmental problem all over the World. Consumption of the plastic solid waste covers big portion within the total solid waste. Although a numerous plastic material is subjected to the recycling process, it is not easy to be destroyed by nature. One of the recommended way to prevent is to utilize as an aggregate in cement-based material. There are many researches on use of recycling rubber in concrete. However, studies on recycling of waste electrical cable rubber (WECR) in concrete is insufficient although there are many research on waste tyre rubbers in concrete. In this study, fine aggregate was replaced with WECR which were 5%, 10%, and 15 % of the total aggregate volume in the concrete and researched workability, unit weight, water absorption, compressive strength, flexural strength, ultrasonic pulse velocity, modulus of elasticity, and abrasion resistance of concrete. As a result of experimental studies, increase of WECR amount in concrete increases workability due to lack of adherence between cement paste and WECR, and hydrophobic structure of WECR while it influences negatively mechanical properties of concrete. It is possible to use WECR in concrete taking into account the reduction in mechanical properties.

The 1999 Kocaeli earthquake that shook Marmara Region, caused immense loss of life and property, ... more The 1999 Kocaeli earthquake that shook Marmara Region, caused immense loss of life and property, damaged the social and economic structures of this country in a nearly irreparable way, and found its way into the earthquake chapter of history books. It was etched in the people's mind due to the fact that it was the biggest earthquake of the near past in terms of magnitude and it devastated a huge area, thousands of people and the second biggest industrial zone of this country; it was also the first earthquake that led the public to be aware of the phenomenon of earthquake, the authorities to consider scientific studies important, the public to question the relevant measures, and to a large-scale rebuilding process in the aftermath. This study focuses on impacts of earthquakes on buildings and settlements situated within the province of Kocaeli where population increased due to the industrial and urbanization developments that were started in the 1950s and where construction projects were intensively built to meet housing demands of ever-growing population, and evaluates the measures taken after the said.

Construction and Building Materials, 2015

Recycled fine aggregates with saturation degrees of 0%, 50% and 100% were studied. Effect of inte... more Recycled fine aggregates with saturation degrees of 0%, 50% and 100% were studied. Effect of internal curing on recycled aggregate concrete was evaluated. RCA had properties comparable to that of virgin aggregate due to internal curing.

firat.edu.tr

Özet: Bu çalışmada, polipropilen, cam ve çelik lifli betonların dona dayanıklılıkları araştırılmı... more Özet: Bu çalışmada, polipropilen, cam ve çelik lifli betonların dona dayanıklılıkları araştırılmıştır. Deneyler için, lifsiz, polipropilen, cam, çelik ve karışık lifli 12 farklı beton üretilmiştir. Beton karışımında mikro yapılı çapı 50 µ, boyut oranı 400 polipropilen ve çapı 14 µ, boyut oranı 857 olan cam lifler ile makro yapılı çapı 0.75 mm, boyut oranı 80 olan çelik lifler kullanıldı. %0.5, 0.75 ve %1 hacimsel oranında çelik lifler, beton içinde %0.1 hacimsel oranında polipropilen ve cam liflerle karışık ve ayrı ayrı kullanıldı. Deneyler ASTM C 666 standardından havada hızlı donma-çözülme koşulları dikkate alınarak yapılmıştır. 30 donma-çözülme çevrimi sonucunda hazırlanan numuneler üzerinde ağırlık kaybı, ultrases geçiş hızı ve dayanıklılık faktörü değerleri belirlenmiştir. Deney sonuçları, betonda kullanılan lif tipine göre değerler arasında önemli farklılıklar olduğunu göstermiştir.

In this study, the effects on the mechanical and durability properties of concrete with cathode r... more In this study, the effects on the mechanical and durability properties of concrete with cathode ray tube glass sand (CRTS) obtained by recycling the screens of cathode ray tubes (CRTs) were investigated. CRTS was used by the ratios of 5, 10, 15, and 20% in the concrete. The unit weight, workability, water absorption, compressive strength, flexural strength, ultrasonic pulse velocity, static and dynamic elastic moduli, abrasion resistance, and alkali-silica reaction (ASR) expansion tests on the concrete were examined. The use of CRTS improved specific properties of concrete according to the fraction of glass aggregate used between 0 and 20%. Plain concrete (P) and CRTS of 5% in concrete gave better results in terms of mechanical properties. Use of CRTS above 5% in concrete declined the mechanical properties but on the 90th day, CRTS concrete reduced the difference. CRTS up to 20% in concrete especially improved abrasion resistance in comparison to P without CRTS; furthermore, this addition did not increase ASR expansion to a deleterious level.