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Zhang, Y. (author), Wan, Z. (author), Miranda de Lima Junior, L.C. (author), Copuroglu, Oguzhan (author)A deeper insight into SO<sub>3</sub>/Al<sub>2</sub>O<sub>3</sub> ratio including the contribution of alumina in slag at early age is required to ensure a properly sulfated slag cement. In this paper, to investigate the effect of gypsum and alumina of slag, emphasis was laid on the hydration characteristics of C<sub>3</sub>S-gypsum-slag system...journal article 2022
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Zhang, Y. (author), Liang, M. (author), Gan, Y. (author), Copuroglu, Oguzhan (author)This paper reports the carbonation characteristics of a cement-slag system exposed to accelerated carbonation testing, and its improved carbonation resistance with the increasing MgO content in blast furnace slag, in which hydrotalcite-like phase plays a key role. Our research showed that the hydrotalcite-like phase started to carbonate upon...journal article 2022
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Zhang, Y. (author), Copuroglu, Oguzhan (author)In this paper, the authors investigated the correlation between slag chemistry and CO<sub>2</sub> binding capacity of the blended system. To simplify the composition of mixture, model paste containing C<sub>3</sub>S, slag covering the common composition range and gypsum was employed. After accelerated carbonation test, three CO<sub>2</sub>...journal article 2022
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França de Mendonça Filho, F. (author), Chen, Y. (author), Copuroglu, Oguzhan (author)Remarkable attention from both academia and industry has been attracted to extrusion-based 3D concrete printing (3DCP) during the last decade. Many companies in the Netherlands, e.g., Royal BAM Group, CyBe, Twente Additive Manufacturing, and Bruil, are attempting to implement this technology in practice. 3DCP is the focused digital concrete...book chapter 2022
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Chen, Y. (author), Toosumran, Nuttapon (author), Chehab, Noura (author), Spanjers, H. (author), Copuroglu, Oguzhan (author)This paper proposes the use of desalination brine as a setting and hydration activator in set-on-demand 3D concrete printing. A series of tests were conducted to investigate the effect of adding different concentrations of desalination brine on stiffness evolution and early-age hydration of Portland cement mortars (PC mixtures) and limestone...journal article 2022
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Zhang, Y. (author), Saravanakumar, Karthikeyan (author), Copuroglu, Oguzhan (author)Because the essential quality metrics of blast furnace slag are based on its oxide composition, the determination of chemical compositions of unhydrated slag grains in an aged concrete could be useful for understanding its past performance and in predicting the remaining service life of existing slag-bearing concrete. In this research, the...journal article 2022
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França de Mendonça Filho, F. (author), Romero Rodriguez, C. (author), Schlangen, E. (author), Copuroglu, Oguzhan (author)Industries such as metal, ceramics and petrochemicals suffer from high temperature spills. Such events exert a unique form of loading in concrete structures that cannot be accurately simulated by heating of samples in an oven. Calcium aluminate cement (CAC) based concrete is the industry standard for such environment, and while much is known...journal article 2022
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Zhang, Y. (author), Zhang, Shizhe (author), Chen, Y. (author), Copuroglu, Oguzhan (author)In this paper, both synthetic slag and commercial slag covering the common composition range were employed to estimate the correlation between slag chemistry and reactivity through hydraulicity and dissolution tests. It was found that slag reactivity was favorably affected by increasing Al<sub>2</sub>O<sub>3</sub> and MgO contents, while the...journal article 2022
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Chen, Y. (author), He, S. (author), Gan, Y. (author), Copuroglu, Oguzhan (author), Veer, F.A. (author), Schlangen, E. (author)This paper aims to provide a systematical review of the available printing strategies, sustainable cementitious materials and characterization methods for extrusion-based 3D concrete printing (3DCP). The printing strategies, consisting of printing setup, process, and material requirements, were summarized initially. In the material aspect,...journal article 2022
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Zhang, Y. (author), Schlangen, E. (author), Copuroglu, Oguzhan (author)The effect of slag of different origins (synthetic slag produced in the laboratory and commercial slag collected from different steel factories) with comparable chemical composition, amorphous content and particle size distribution, on the hydration characteristics of slag cement was investigated. In order to study the effect of sulfur in...journal article 2022
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Rossi, E. (author), Rahul, R. (author), Copuroglu, Oguzhan (author), Jonkers, H.M. (author)The possible beneficial impact of self-healing on chloride transport through cracks has been assessed for two bacteria-based self-healing mortar mixtures in comparison with Ordinary Portland cement mortar. Intact self-healing specimens featured lower chloride transport coefficients thanks to a denser microstructure and to the formation of a...journal article 2022
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Zhang, Y. (author), Copuroglu, Oguzhan (author)This paper studies chemical composition of partially and fully hydrated slag grains in a (nearly) 40-year-old field concrete from the Netherlands. The concrete samples were assumed to be sufficiently aged to contain fully hydrated slag grains as well as partially hydrated large slag particles with thick rims. Our analysis showed that three...journal article 2022
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Zhang, Y. (author), Copuroglu, Oguzhan (author)This paper identified carbonation products in the slag-rich cementitious systems upon three different exposure conditions, namely, long term exposure in the field, indoor natural exposure, and accelerated carbonation testing. Overall, mineralogy of the carbonation products was found to be fundamentally similar under different exposure...journal article 2022
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Chen, Y. (author), Copuroglu, Oguzhan (author), Romero Rodriguez, C. (author), França de Mendonça Filho, F. (author), Schlangen, E. (author)For many 3D printed cementitious materials, air voids may play a dominant role in the interlayer bond strength. However, to date, far too little attention has been paid to reveal the air void characteristics in 3D printed cementitious materials. Therefore, to fill this gap, this study attempts to provide an example of systematically...journal article 2021
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Krstic, Marija (author), Davalos, Julio F. (author), Rossi, E. (author), Chaves Figueiredo, S. (author), Copuroglu, Oguzhan (author)Over the last few years, the United States has experienced a shortage of fly ash and slag that consequently created a need for an alternative material that is locally available, sustainable, and provides desirable concrete properties. Recent studies have shown that Ground Glass Pozzolan (GGP) offers favorable attributes as a supplementary...conference paper 2021
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Rossi, E. (author), Zhang, Hongzhi (author), Nijland, Timo G. (author), Copuroglu, Oguzhan (author), Polder, R.B. (author), Šavija, B. (author)An important input parameter for numerical models that simulate cracking of the concrete cover due to reinforcement corrosion is the Elastic modulus of corrosion product (Ecp). Despite its relevance, Ecp is subject of significant variations according to the values reported in the literature, which vary from less than 100 MPa up to 360 GPa....conference paper 2021
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Bhattacherjee, Shantanu (author), Basavaraj, Anusha S. (author), Rahul, A. V. (author), Santhanam, Manu (author), Gettu, Ravindra (author), Schlangen, E. (author), Chen, Y. (author), Copuroglu, Oguzhan (author), Wang, Li (author)This paper explores the sustainability aspects of binders used in concrete 3D concrete printing. Firstly, a prospective approach to conduct sustainability-assessment based on the life cycle of 3D printed structures is presented, which also highlights the importance of considering the functional requirements of the mixes used for 3D printing....journal article 2021
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Justino de Lima, C.L. (author), Veer, F.A. (author), Zhang, H. (author), França de Mendonça Filho, F. (author), Copuroglu, Oguzhan (author), Nijsse, R. (author)The investigation of new compositions is crucial for the expansion of possible applications of glass, from the typical applications for building engineering, in the form of cast blocks or float glass, to more advanced technologies, such as 3D-printed glass or glass-to-metal connections. Since high melting temperatures and brittleness are two...journal article 2021
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Krstic, M. (author), Davalos, Julio F. (author), Rossi, E. (author), Chaves Figueiredo, S. (author), Copuroglu, Oguzhan (author)Recent studies have shown promising potential for using Glass Pozzolan (GP) as an alternative supplementary cementitious material (SCM) due to the scarcity of fly ash and slag in the United States. However, comprehensive studies on the freeze-thaw (FT) resistance and air void system of mixtures containing GP are lacking. Therefore, this study...journal article 2021
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Yalçinkaya, Ç. (author), Copuroglu, Oguzhan (author)Ultra-high performance concrete (UHPC) is an innovative cement-based composite with high mechanical performance under tensile and compressive loads, extremely low permeability, and excellent durability. Because of these features, UHPC has the potential to contribute to the development of new architectural perspectives and structural systems...journal article 2021