Halit Yazıcı

Halit Yazıcı
Dokuz Eylul University | DEÜ · Department of Civil Engineering

PhD

About

99
Publications
61,319
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
2,995
Citations
Additional affiliations
August 2014 - present
Dokuz Eylul University
Position
  • Professor

Publications

Publications (99)
Article
Full-text available
Reactive powder concrete (RPC) is an ultra-high strength and high ductil-ity cement-based composite. Associated with early-age shrinkage, high cement dosage may reduce the mechanical and durability performance of RPC. This study aims to clarify the influence of high volume mineral admixtures, aggregate restraint and fibre reinforcement on early-age...
Article
Waste management has been the foremost concern in the last decades. Utilizing sanitary ware ceramic (SWC) wastes in concrete has been found to be beneficial in terms of sustainability and cost in previous studies; however, deleterious alkali-silica reaction (ASR) potential of this waste aggregate, albeit it’s high SiO2 content, has not been taken i...
Conference Paper
Full-text available
Eklemeli üretim teknolojileri mühendisliğin tüm alanlarında yaygınlaşmaktadır. Üç boyutlu beton yazdırma (3BBY) ise dünyada en çok tüketilen malzemelerden olan betonun eklemeli üretim yöntemidir. 3BBY tekniği, kalıp kullanımı gerekmeden bilgisayarda oluşturulmuş bir 3B modelin katman katman ekstrüzyonu esasına dayanmaktadır. Bu teknolojinin en önem...
Article
In this study, stirring speeds during the synthesizing process of the sodium silicate/polyurethane microcapsules were optimized. The yield values of microcapsules at different stirring rates were evaluated. Based on the yield values and shape of microcapsules, optimized microcapsules were obtained. The measurements of the shell thickness of microca...
Article
Enhancing and characterization of self-healing ability of ultra high performance concrete (UHPC) is the main aim of this study. The self-healing mechanisms of macro/micro cracks were investigated through different techniques with some novel procedures. Two different mix designs have been considered to increase the amount of unreacted particles in t...
Article
Full-text available
Purpose: It is anticipated that cast-in-situ applications of ultra-high performance concrete (UHPC) will increase in the near future, so the studies on early-age properties of UHPC have come into prominence. The basic variable of mix proportions that determines the rheological and shrinkage properties is undoubtedly aggregate volume and accordingly...
Conference Paper
In several studies, Isophorone diisocyanate (IPDI), a monomeric aliphatic diisocyanate, has been microencapsulated with various polymeric shells for self-healing purposes in polymer-based materials. In this study, for the first time, isophorone diisocyanate was microencapsulated with silica shell via interfacial polycondensation of a silica precurs...
Conference Paper
Full-text available
Atık cürufun beton üretiminde doğal agreganın bir kısmının yerine kullanılması hem çevresel fayda hem de ekonomiye katkı sağlamaktadır. Bu çalışmada, Elektrikli Ark Ocağı Cürufunun betonda ince ve kaba agrega olarak kullanılabilirliği araştırılmıştır. Egedemir - Derebeton firmaları tarafından gerçekleştirilen TÜBİTAK-TEYDEB araştırma projesinin son...
Article
In this study, the flexural behavior of Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) beams produced in mono and hybrid forms were investigated experimentally and numerically. Twelve doubly reinforced concrete beams were casted with four different reinforcement ratios representing low to excessive levels. The beams were produced in thre...
Conference Paper
Full-text available
Reinforced concrete elements in marine environment are exposed to various physical and chemical effects. Sulfate effect, carbonic acid effect, leaching of the lime from concrete, chloride corrosion, freezing and thawing, salt crystallization and the abrasive effects of waves/floating particles can be given as examples of these effects. The factors...
Conference Paper
Full-text available
The cracks formed in the matrix of cementitious materials can cause serious durability issues in short and long terms. It can be difficult and costly to repair these cracks in structures such as underground structures and concrete silos containing harmful liquids. Many approaches are therefore being developed in order to improve the self-healing ab...
Conference Paper
Full-text available
Reinforced Concrete structures exposed to seawater are subject to significant durability problems. Correct evaluation of the corrosion process of the rebar is very important for the service life of the marine structures. In this study, the performance of three different C25/30 class concrete mixes prepared with 20 % fly ash (replaced with CEM I cem...
Article
The effects of recycled glass (RG) and recycled concrete (RC) fine aggregates on the compressive strength, ultrasonic pulse velocity, dynamic elastic modulus, transport properties and freeze–thaw resistance of mortar mixture were investigated comparatively. Nine different mortar mixtures were prepared by partial replacement of crushed-limestone fin...
Article
Many tests and methods can be used to assess or verify the self-healing mechanisms of cement-based materials. This study, which is part of wider project, deals with the development and application of a test method for studying the self-healing ability of cementitious composites. The principle of this method lies in the bonding capacity of self-heal...
Article
This study provides a comparative study of the accelerated mortar bar (ASTM C1260-14 and ASTM C 1567-13) and RILEM AAR-4 test methods. They were used to evaluate the alkali-silica reaction (ASR) mitigation potential of supplementary cementitıous materials (SCMs) and lithium salts. For this purpose, 96 mixtures with two different reactive aggregates...
Article
In this study, the effects of recycled glass (RG) and recycled concrete (RC) fine aggregates on the drying-shrinkage, carbonation, high temperature and abrasion resistance of mortar mixtures were investigated comparatively. In addition, durability performance of the mortar mixtures was investigated through micro-structural analysis. For this purpos...
Conference Paper
Full-text available
In this study, it was aimed to produce a four-person lightweight concrete canoe to participate in the National Intercollegiate Concrete Canoe Competition organized by Istanbul Technical University. Concrete canoe competition is a prestigious activity held regularly in the USA since 1988 by ASCE, mainly aimed at sharing knowledge among civil enginee...
Conference Paper
Self-healing approaches in cementitious materials are enhancing day by day. Microencapsulation of a healing agent is one of the most promising self-healing methods. In the event of any crack occurrence, the microcapsule breaks and the healing agent release into the crack. The sodium silicate, which has many advantages as a self-healing agent in cem...
Article
Storing healing agents in capsules is one of the most promising self-healing methods in cementitious materials. Because of the considerable advantage of microencapsulation, it has become more interested as compared to the other encapsulation methods. The sodium silicate, which has many advantages as a healing agent in cementitious materials, can be...
Article
Full-text available
In this study, early age (first 24 hours) shrinkage properties of Ultra High Performance Concrete (UHPC) mixtures with and without fibers, exposed to two different initial curing conditions, were investigated. The effect of early age shrinkage cracks on development of corrosion of steel reinforcement embedded in UHPC has been determined experimenta...
Article
h i g h l i g h t s RC specimens strengthened with UHPFRC laminates were tested in the laboratory. Two different bonding methods: gluing with epoxy and mechanical anchoring were compared. Load carrying capacity of the strengthened RC beams was improved. a b s t r a c t Ultra-high performance fiber-reinforced concrete (UHPFRC) is a cementitious c...
Conference Paper
Full-text available
Extreme autogenous shrinkage of ultra-high performance concrete (UHPC) may cause unexpected problems based on shrinkage cracking, such as decrease in durability, low mechanical performance. In this study, efficiency of shrinkage-reducing admixture (SRA) in reducing autogenous shrinkage of ecofriendly UHPCs containing high volume mineral admixtures...
Conference Paper
Full-text available
In this study, the effects of ground granulated blast furnace slag (GGBFS) replacement ratio on the rheological properties and autogenous shrinkage of paste phase of UHPC with polycarboxylic ether (PCE) based superplasticizer were investigated. Results showed that GGBFS replacement caused a decrease in PCE based superplasticizer demand of UHPC past...
Article
Steel fibers are commonly used in cement based materials for many applications such as floors, structural elements, repairing works, etc. The chloride-induced corrosion via ingress of seawater may become a risk for performance of the steel fiber reinforced cement based composites. Despite of few studies that have dealt with the corrosion behavior o...
Conference Paper
Full-text available
There are many tests and methods than can be used to assess or verify the self-healing mechanisms of cement based materials. This study, which is a part of wider project, has dealt with development and application of a novel test method for studying the self-healing ability of cementitious materials. The self-healing ability of two flowable ultra-h...
Conference Paper
Full-text available
Deniz suyu etkisine maruz betonarme yapılar önemli durabilite problemleri ile karşı karşıya kalmaktadır. Betonun bozulma sürecinin ve betonarme donatısının korozyon sürecinin doğru değerlendirilmesi deniz yapılarının servis ömrü açısından büyük önem arz etmektedir. Bu çalışma kapsamında, CEM I çimentosu ile üretilmiş ve çimento miktarının %20 oranı...
Article
Agregada bulunan amorf silis ve boşluk çözeltisindeki alkaliler arasında gerçekleşen alkalisilis reaksiyonu (ASR), hasarla sonuçlanan önemli durabilite sorunlarındandır. Bu çalışmada, çeşitli karışımların alkali-silis reaktiviteleri, RILEM komitesi tarafından geliştirilen AAR-3 ve AAR-4 deneyleriyle araştırılmıştır. Bu hızlandırılmış deneylerde num...
Article
Full-text available
Alkali-silica reaction (ASR) which takes place between amorphous silica in the aggregate and alkalis in the pore fluid is one of the durability problems causing deterioration of mortars. In this study, alkali-silica reactivity of various mixtures was evaluated according to AAR-3 and AAR-4 tests developed by RILEM. For determining the extent of alka...
Article
Full-text available
In this study, the effects of recycled glass (RG) and recycled concrete (RC) fine aggregates on acid and sulfate resistance as well as alkali-silica reaction (ASR) expansion of mortar mixture were investigated comparatively. In addition, durability performance of mortar mixtures was supported by microstructural analysis. For this purpose, nine diff...
Conference Paper
Full-text available
High amount of cementitious material and low water/binder (W/B) ratio increase shrinkage strain which also increases the crack formation risk of ultra-high performance concrete (UHPC). The effects of silica fume replacement ratio on the rheological properties and autogenous shrinkage of UHPC paste were investigated in this study. Four pastes with a...
Article
Full-text available
Deniz ortamında bulunan betonarme elemanlar değişik fiziksel ve kimyasal etkilere maruzdur. Bunlar arasında, sülfat etkisi, karbonik asit etkisi, beton içindeki kirecin yıkanarak uzaklaşması, klorür korozyonu, donma-çözülme, tuz kristalizasyonu, dalgaların ve yüzen parçacıkların aşındırıcı etkileri sayılabilir. Genel olarak en çok hasarın, ıslanma-...
Conference Paper
Full-text available
The mechanical performance and durability of steel fiber reinforced concrete have been investigated by many researchers. However, the durability problems which affect the fiber-matrix bond characteristics have not been investigated extensively. The corrosion via ingress of sea water which includes chloride ions may become a risk in terms of the ste...
Conference Paper
This paper presents some results of a continuing study that deals with the durability of concrete and rebar corrosion exposed to real marine environment. This study examined the correlation of electrical resistivity and rapid chloride ion permeability values of different concrete mixtures with chloride penetration depths of specimens which were sub...
Conference Paper
Full-text available
There is a limited number of studies about early-age properties and shrinkage of UHPC. High amount of cement and low water/cement (W/C) ratio increase the autogenous shrinkage which also increases the crack formation risk. The effects of water to cement ratio on rheological properties and autogenous shrinkage of paste phase of UHPC were investigate...
Article
Full-text available
Self-compacting repair mortar (SCRM) is a functional material for repair or retrofit applications. Industrial byproducts, such as fly ash (FA) or ground granulated blast furnace slag (GGBFS), can be used to reduce cement dosage and to obtain an eco-friendly material. However, these waste materials may cause durability problems at early ages as a re...
Article
Full-text available
Aggregates in many parts of the Middle East are contaminated with gypsum. Therefore, in this study the effects of using gypsum-contaminated natural sand on the compressive strength and expansion of ultra-high performance fiber reinforced cementitious composites (UHPFRCCs) were investigated over a period of one year. Two groups of UHPFRCCs were desi...
Conference Paper
Reinforced concrete elements in marine environment are exposed to various physical and chemical influences. In general, it can be stated that the elements in the wetting-drying regions are exposed to highest rate of damage. Since there is a combined effect generated by chloride and sulphate ions in sea water, the concrete while on one hand bears th...
Article
Full-text available
In this study, the utilization of bottom ash as an aggregate in the production of lightweight building blocks was investigated. Pumice aggregate which was used in lightweight control mixture replaced by the bottom ash aggregate and on the other hand, cement replaced by high volume fly ash. Physical and mechanical properties of mixtures were determi...
Conference Paper
In this study the effects of recycled glass and recycled concrete fine aggregates on the compressive strength, water absorption, chloride-ion penetration, freeze-thaw and sulfate resistance as well as ASR expansion of mortar mixtures were investigated comparatively. For this purpose, 9 different mortar mixtures were prepared by replacing 25, 50, 75...
Conference Paper
Full-text available
In this study the effects of recycled glass and recycled concrete fine aggregates on the compressive strength, water absorption, chloride-ion penetration, freeze-thaw and sulfate resistance as well as ASR expansion of mortar mixture were investigated comparatively. For this purpose, 9 different mortar mixtures were prepared by replacing 25, 50, 75...
Conference Paper
Full-text available
Lif-matris aderansı çimento esaslı lifli kompozitlerin performansını etkileyen en önemli faktörlerden biridir. Lif türü ve geometrisi, matris dayanımı, lif-matris arayüzey özellikleri ve kür koşulları gibi birçok parametre lif-matris aderansını etkilemektedir. Çalışma kapsamında çeşitli su/bağlayıcı oranına sahip karışımlar tasarlanmış ve farklı kü...
Article
Full-text available
The type and amount of filler are amongst the most important parameters influencing rheological, mechanical and durability characteristics of self consolidating concrete (SCC). Influence of using a limestone powder, the filler portion of reactive basalt filler and a type of class C fly ash on the fresh properties, alkali–silica reactivity and trans...
Article
Full-text available
The effect of combining brass-coated steel microfiber and ground-granulated blast-furnace slag (GGBS) on the mitigation of deleterious expansion due to alkali-silica reaction (ASR) was investigated in this research. A potentially reactive basaltic aggregate was chosen as a reactive material. Two series of specimens containing different amounts of m...
Conference Paper
Full-text available
A frost resistance is required for the concrete and reinforced concrete elements such as girder bridges, dams, concrete paving and airport runways in cold climatic zones. The water in the capillary spaces of concrete is freezes and expands when subjected to frost effect water-saturated hardened concrete. The expansion amount at the end of re-freezi...
Conference Paper
Full-text available
Slurry infiltrated fiber concrete (SIFCON) is a special type high performance composite material which includes 5-30% steel fiber volume. Its superior toughness property indicates the potential of using SIFCON in industrial floors, strengthening works, explosion resistant military structures, and seismic resistant structures. Since fiber-reinforced...
Conference Paper
Full-text available
Durability aspects are significant concern for cement based materials. The pore structure of concrete is one of the most important factors which affect the interaction of concrete and aggressive environment. There are well-known and accepted permeability tests to characterize the pore structure of concrete. The correlations between non-destructive...
Conference Paper
Full-text available
Alkali-silica reaction (ASR) which takes place between amorphous silica in the aggregate and alkali pore fluids in the concrete is one of the durability problems causing expansion and deterioration. In this study, alkali-silica reactivity of different mixtures was evaluated according to AAR-3 and AAR-4 tests developed by RILEM. In both tests, speci...
Article
Full-text available
Reactive Powder Concrete (RPC) is a type of ultra-high performance cement based composite with high strength and ductility. RPC was developed in the 1990s by Bouygues' laboratory in France. It is a special type of concrete which has properly optimized micro grain, binder phase and steel micro-fibers. RPC can achieve compressive strength values betw...
Article
Full-text available
SIFCON (Slurry Infiltrated Fiber Concrete) can be described as a special type of cement based composite produced with fiber volume fraction values between 5 to 30%. As a result of superior mechanical properties such as compressive, tensile, shear and flexural strengths with extraordinary toughness values, SIFCON can be used in in industrial floors,...
Article
Full-text available
Reactive Powder Concrete (RPC) is characterized by high cementitious material content, very low water to cement ratio and steel micro-fiber reinforcement. This type of cementitious composite has greater ductility, durability and mechanical properties compared to traditional concrete. Abrasion resistance of the composite material is still not well u...
Conference Paper
Full-text available
Reaktif pudra betonu, çok yüksek dayanım ve sünekliğe sahip yüksek performanslı çimentolu bir kompozittir. 1990’lı yıllarda Fransa’nın Bouygues Laboratuarı’nda geliştirilmiştir. Mikro tanelerin, bağlayıcı fazının ve kısa kesilmiş çelik liflerin iyi şekilde optimize edildiği özel bir beton türüdür. Günümüz yapılarında kullanılan geleneksel betonlar...
Conference Paper
Full-text available
SIFCON (Slurry Infiltrated Fiber Concrete) hacimce %5-30 oranında lif içeren çok yüksek sünekliğe, enerji yutma kapasitesine, eğilme ve çekme dayanımına sahip bir kompozittir. Yüksek performansı sayesinde endüstriyel zeminlerde, güçlendirme işlerinde, patlamaya ve rokete dirençli askeri yapılarda kullanılabilmektedir. Çimento esaslı lifli kompozitl...
Conference Paper
Full-text available
Ultra yüksek performanslı beton (UYPB), üstün mekanik özelliklere ve kalıcılık performansına sahip yeni nesil çimento esaslı bir kompozittir. Düşük su/çimento oranı ve yüksek sıkışma yoğunluğu ihtiyacı, uygun işlenebilirliğe erişmek için yüksek oranda akışkanlaştırıcı katkı kullanımını gerektirmektedir. Bağlayıcıların karışım içerisinde yeni nesil...
Conference Paper
Full-text available
Son yıllarda akışkanlaştırıcı katkı teknolojisindeki heyecan verici gelişmeler betona kendiliğinden yerleşebilirlik yeteneğini getirmiştir. Kendiliğinden yerleşen çelik lifli beton (KYÇLB), kendiliğinden yerleşen betonun (KYB) taze haldeki avantajını ve lif takviyesi sonucu sünekliği birleştirmektedir. KYB’nin donma – çözülme direnci gereksinimini...
Article
The effect of ASR on fiber–matrix bond behavior has been investigated in this research. The potentially reactive basaltic aggregate was chosen as a reactive material. Two series of specimens containing different amounts of supplementary cementing materials (SCMs) were prepared. One of them was cured in 1 M NaOH solution at 80 °C, other series were...
Conference Paper
Full-text available
Reactive Powder Concrete (RPC) is characterized by high cementitious material content, very low water to cement ratio and steel micro-fiber reinforcement. This type of cementitious composite has greater ductility, durability and mechanical properties compared to traditional concrete. Abrasion resistance of the composite material is still not well u...