Akın, Arife
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Akin, Arife
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aakin@ktun.edu.tr
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02.02. Department of Civil Engineering
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Current Staff
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Sustainable Development Goals
7
AFFORDABLE AND CLEAN ENERGY
1
Research Products
8
DECENT WORK AND ECONOMIC GROWTH
1
Research Products
11
SUSTAINABLE CITIES AND COMMUNITIES
1
Research Products
12
RESPONSIBLE CONSUMPTION AND PRODUCTION
1
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14
LIFE BELOW WATER
1
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6
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262
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5
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16
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6
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5/20
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2
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0
WoS Citation Count
40
Scopus Citation Count
42
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3
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3
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0
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0
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2.50
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2.63
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9
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| Journal | Count |
|---|---|
| Academic Journal of Nawroz University (AJNU) | 1 |
| Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi | 1 |
| Open Journal of Nano | 1 |
| Structural Concrete | 1 |
| STRUCTURAL CONCRETE | 1 |
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Master Thesis Cam Fiber Takviyeli Polimer Kompozit Levhalar Kullanılarak Güçlendirilmiş Betonarme Kirişlerde Kesme Davranışının Deneysel ve Analitik Olarak İncelemesi(Konya Teknik Üniversitesi, 2022) Al-Shalif, Sadeq Ali Hamood; Akın, ArifeBetonarme yapılar deprem, kasırga gibi doğal afetler ve patlama gibi ani yüklere maruz kaldığında büyük hasarlar alabilmektedir. Bu etkiler sonucunda hasar alan yapılar incelendiğinde yapı elemanlarındaki göçmenin çoğunlukla kesme hasarından kaynaklandığı görülmektedir. Kesme göçmesi ise çeşitli sebeplerden oluşmaktadır. Bunlar; kesme donatısında yetersizlik, paslanma nedeniyle takviye bölgesinde azalma, servis yüklerinde artış vb. olarak sıralanabilir. Yürütülen tez çalışması kapsamında Cam Fiber Takviyeli Polimer (GFRP) şeritleri ile güçlendirilmiş betonarme kirişlerin kesme davranışı deneysel ve analitik olarak incelenmiştir. Bu amaçla, kesme göçmesini belirlemek üzere uzunlamasına donatı çubuklarıyla donatılmış 9 adet betonarme T- kiriş numune imal edilmiştir. Bütün deney numunelerinde geometri ve donatı özellikleri aynı seçilmiştir. Kiriş numunelerinden bir tanesi referans olarak üretilmiştir. 6 kiriş farklı sargılama şekillerinde tek kat GFRP ile sargılanmıştır. Şeritli GFRP uygulamasında güçlendirmelerin iki tanesinde cam fiber farklı açılardan (45o ve 90o) spike tipi ankrajlarla kirişe sabitlenmiştir. Tüm numuneler 10 kN'luk periyotlarla artan yükleme altında kırılana kadar ulaştığı yük ve deplasman değerleri kaydedilmiştir. Elde edilen deneysel sonuçlar ACI 440.2R-17, TBEC-2019 ve FIB-2001 tarafından önerilen amprik bağıntılardan elde edilen sonuçlar ile karşılaştırılmıştır. Yapılan deneyler cam fiber takviyeli polimer kompozitler ile güçlendirme yönteminin betonarme kirişlerde kesme deformasyonunu azaltmada rolü olduğunu göstermiştir. Ayrıca uygulanan güçlendirme yönteminin bazı sargılama modellerinde kırılma modunun değişmesine sebep olduğu görülmüştür. Güçlendirme uygulanan TB-1, TB-2 ve TB-3 numunelerinde kesme hasarı meydana gelirken, TB-4, TB-5, TB-6, TB-7 ve TB-8 numuneleri sünek davranış göstermiş ve eğilme nedeniyle kırılmıştır. Çalışma sonucunda deneysel ve analitik sonuçların karşılaştırılmasıyla ampirik bağıntıların deneysel sonuçlara göre oldukça tutucu değerler verdiği görülmüştür.Article Citation - WoS: 10Citation - Scopus: 7Investigation of Different Permeability Properties of Self-Healing Cementitious Composites Under Colloidal Nano Silica Curing Conditions(ERNST & SOHN, 2022) Akın, ArifeIn this study, the self-healing behavior of engineered cemetitious composites (ECC) containing different types and quantities of fly ash (FA) under colloidal nano silica (CNS) curing conditions was investigated through the examination of their different permeability properties. FA in two different characters, Class F and Class C, were used in the preparation of the mixtures in high volumes (FA/portland cement = 1.2 and 2.2). Self-healing capacities developed under CNS curing conditions were evaluated by changes in different permeability properties such as rapid chloride permeability test (RCPT) and electrical impedance measurement methods. In addition to these, the self-healing effects of the cracked composites were supported by microstructure analysis with the help of SEM-EDX and XRD tests on the sections taken from the crack interface of the sample. The results have showed that the CNS curing condition helps improve the permeability properties of composites by quickly and effectively covering their micro pores and cracks. In addition, the results of the experiment have revealed the effects of the use of different types and quantities of FA on the self-healing behavior of the ECC material. Finally, correlation analysis of ECC samples was applied according to the results obtained from EI and RCPT test methods and it was revealed that there was a negative significant relationship between test methods.Master Thesis Kenevir Bitkisi Atıklarının Isı Yalıtım Malzemesi Olarak Kullanılabilirliğinin İncelenmesi(Konya Teknik Üniversitesi, 2022) Kaynak, Bekir; Akın, ArifeDünyanın büyük bir kısmını yapılar oluşturmaktadır. Yapılar nedeniyle ortaya çıkan enerji tüketimi, dünyada var olan enerji ihtiyacı toplamının %40' ını içine almaktadır. Yapı ile ilgili bütün birimler dikkate alındığında bu oran %70' lere çıkmaktadır. Böylesine yüksek enerji tüketim oranları sonucunda, sağlık ve çevre ile ilgili sorunlar artmış ve bunların sonucunda çözüm yollarının araştırılması ihtiyaç olmuştur. Araştırmalar sonucunda sürdürülebilir gelişme çözüm yolu olarak ortaya çıkmıştır. Yapılar için alternatif yapı malzemeleri araştırılmış ve doğal yapı malzemelerinin sürdürülebilirlik için önemli olduğu belirlenmiştir. Sürdürülebilirlik ve enerji verimliliği açısından yapı malzemelerinden ısı yalıtım malzemelerinin önemi ise oldukça fazladır. Bu çalışmada ısı yalıtım malzemesi olarak kullanılabilecek kenevirden üretilen ısı yalıtım malzemesinin özellikleri ve kullanılabilirliği ile birlikte sürdürülebilirlik kavramı incelenmiştir. Çalışmada ısı yalıtım malzemeleri ile ilgili kısa bilgiler verilerek organik yalıtım malzemelerinden özellikle kenevir bitkisi atıklarının yalıtım malzemesi olarak kullanılabilirliği araştırılmıştır. Ayrıca sürdürülebilirlik kavramına dikkat çekilmiş ve sürdürülebilirlik ile ilgili açıklamalara yer verilmiştir. Konu ile ilgili yapılmış çalışmalar da incelenerek kenevirin ısı yalıtım malzemesi olarak kullanılabilirliği açıklanmıştır. Yapılan incelemeler sonucunda doğal yalıtım malzemelerinden kenevirin ısı yalıtım malzemesi olarak kullanılması için gerekli mekanik ve fiziksel özelliklere yakın sonuçlar verdiği ve tam anlamıyla ısı yalıtım malzemesi olarak kullanılabilmesi için geliştirilmesi gerektiği ortaya çıkmıştır.Article Use of F-Type Fly Ash in Cement Mortar With Alternative Mixing Methods(2022) Akın, Arife; Alithawi, MarvanIn this study, it is focused on the use of fly ash, which is one of the industrial wastes, as a partial replacement of cement and fine aggregate in cement mortar. The feasibility of using fly ash as an alternative to cement and fine aggregates in concrete was determined by examining its effect on strength and durability properties in composites. Fly ash was used in the mixtures with three different mixing methods. This is the simple substitution method, addition method and partial substitution method. In each method, 10%, 20% and 30% of the material was removed by weight, and a total of ten different mixtures were prepared by adding fly ash instead. As a result of the experiments to determine the properties of the mixtures in the fresh and hardened state, the addition of fly ash to the mixtures improved the workability and freezethaw resistance. When we look at the results in terms of the methods used in the study, it was seen that the addition method gave better results in pressure, water absorption and capillary water absorption experiments than other methods, and according to the bending and cylinder splitting test results, higher values were obtained in the mixtures prepared with the partial substitution method compared to the other mixing methods.Conference Object Electrical Properties of Carbon Nanotube and Carbon Fiber Reinforced Cementitious Composites(2021) Öztürk, Oğuzhan; Akın, ArifeThe addition of nano/micro scale carbon-based materials into cement-based composites is of significance for achieving reliable electrical properties in different civil engineering practices. The present study aims to disperse carbon-based materials homogenously for the improved electrical performance for non-structural functionalities. The investigation addresses the different mixing methods of carbon nanotubes (CNT) and carbon fibers (CF) on the electrical properties of cement mortars. To do this, two mixing methods for each carbon-based material were applied and the electrical properties of cement mortars were evaluated via alternating current (AC) measurements. Although both carbon-based materials were able to improve the electrical properties, CFs were more pronounced in terms of reducing the electrical resistivity values of specimens compared to CNT-based and reference specimens. It is worth noting that proposing different methods may also further enhance the electrical properties for the specific mixture design of cement-based composites.Conference Object Lightweight Geopolymer Mortars Containing Waste Tires for Sustainability(2023) Parçal, İbrahim; Akın, ArifeEfficient use of natural resources and sustainable utilization of waste materials are of great importance in the production of construction materials. This study investigates the potential of using waste tires as aggregate in the production of lightweight geopolymer concrete. While waste tires cause serious challenges in terms of storage and recycling, this study investigates the use of waste tires as a sustainable alternative in the construction industry. Within the scope of the experiments on the subject, lightweight geopolymer mortar was produced instead of lightweight geopolymer concrete. In this way, it is thought that it can be used as a predictive tool in the evaluation of real geopolymer lightweight concrete behavior by taking advantage of its advantages such as more control and less material usage. In the experiments, waste tire was tested as a pumice substitute in lightweight geopolymer mortar. For this reason, waste tire (0-5 mm) and pumice (0-5 mm) were replaced with sand (0-5 mm) at 10%, 40%, 70% and 100%. Mini-spreading, unit volume weight, compressive strength, flexural strength and compressive strength tests were performed on the geopolymer mortar specimens. As a result of the experiments, it was observed that although the waste tire negatively affected the mechanical properties compared to pumice, it positively affected the ductility of the composite by not breaking down at fracture.Conference Object Assessment of Some Waste Materials as Aggregate in Cementitious Composites(2022) Akın, ArifeConcrete is the most used building material in our world. With the increase in the world population, the need for concrete increases. As concrete production increases, the amount of aggregate used also increases and usable aggregate reserves are depleted over time. Experimental studies carried out to evaluate waste materials in concrete production have generally focused on materials that can be used instead of cement. Cement is the most costly and industrially produced material used in concrete. However, aggregates are the materials used in the highest volume in concrete production. Aggregates generally used in normal concrete are obtained from natural rocks. Evaluation of waste materials instead of aggregates used in concrete production becomes an important issue in terms of conservation of natural resources and disposal of wastes with an environmentalist perspective. In this study, recycled aggregate obtained from construction demolition wastes, waste marble dust and waste glass dust were used instead of natural aggregate in the cementitious composite mixtures to be produced. In the control sample, 0-4 mm sand from the Konya region was used, while in the other samples 10%, 20% and 30% of the waste materials were replaced with sand. Compressive, bending and water absorption tests were performed on the samples at the end of 7 days, and the test results of the samples obtained using different waste materials were compared with the control samples. As a result of this study, the optimum use of waste material was evaluated as 20% in the use of waste materials in the production of cementitious composites.Article Investigation on Mechanical Properties of Cementitious Composites Cured in Colloidal Nanosilica Sio2 Solution(2022) Abdulateef, Lana Ayad; Saleem, Rondik Sıdqı; Akın, ArifeNano technology is one of the most widely searched techniques in the world nowadays. Several studies reported with nanoparticles are based on the nano-silica (nano-SiO2) addition to the fresh mix to improve the performance of concrete. Nano-SiO2 is highly reactive with calcium hydroxide and is able to act not only as a filler, blocking the concrete pores, but also as an activator to promote pozzolanic reaction. In this paper, the effect of different concentration of nano silica solution on concrete compressive strength have been studied (when using it in curing instead of water). Samples were made by adding fly ash (FA/PC= 1.2 and 2.2) and some were immersed in water and others in a solution of water and Nano SiO2 with different concentrations (0.5, 1, 2 and 3) %. Then the samples have submitted to compression test after 3, 7 and 28 days to notice the impact of using Nano silica solution in curing stage. Fly ash has been used in this experiment for several reasons. 1. Development of the mechanical properties of the cement-bonded composites. 2. Reduces the percentage of cement use and therefore environment will keep clean because the cement reaction produces CO2 which cause pollution to the environment.Article Citation - WoS: 4Citation - Scopus: 5Mechanical and Permeability Properties on Self-Healing of Cementitious Composites Effect of Nano Silica Cure(Ernst & Sohn, 2022) Akın, ArifeThe self-healing behavior of concrete elements with high risk of crack formation under various conditions from the moment of production has become a very important issue. In this study, the effectiveness of nano silica (NS) curing solutions in terms of self-healing behavior in engineered cementitious composites (ECC) was investigated. For this purpose, precuring was applied to the cementitious composite mixture prepared with four different contents for 7, 28, and 90 days and then half of the specimens were exposed to damage to certain extents of the mechanical strength loads. Half of the specimens were left in a 2% solution of NS for a further period of 7, 30, 60, and 90 days, and another portion was left in curing only in water (W). The mechanical properties of the sound and preloaded specimens were investigated with compressive and flexural tests, and the improvements in permeability were investigated with the help of water absorption and sorptivity tests. As a result of the experimental studies, it was observed that the nano silica solution applied to the specimens during the curing phase caused a more effective and rapid healing in the mechanical and permeability properties of the composites when compared with the water curing.Conference Object Use of F Type Fly Ash in Cement Mortar With Alternative Mixing Methods(2021) Akın, Arife; Alithawi, MarvanIn this study, it is focused on the use of fly ash, which is one of the industrial wastes, as a partial replacement of cement and fine aggregate in cement mortar. The feasibility of using fly ash as an alternative to cement and fine aggregates in concrete was determined by examining its effect on strength and durability properties in composites. Fly ash was used in the mixtures with three different mixing methods. These is the simple substitution method, addition method and the partial substitution method. In each method, 10%, 20% and 30% of the material was removed by weight, and a total of ten different mixtures were prepared by adding fly ash instead. As a result of the experiments to determine the properties of the mixtures in fresh and hardened state, the inclusion of fly ash in the mixtures improved the workability, freeze-thaw resistance, water absorption and capillary water absorption rate increased with the increase of the fly ash content. The results obtained in terms of the methods used in the study; in the pressure, water absorption and capillary water absorption experiments, the addition method gave better results than the other methods, and according to the bending and cylinder splitting test results, the mixtures prepared with the partial substitution method were found to be higher than the other mixing methods.
