Zobrazeno 1 - 10
of 94
pro vyhledávání: '"Sang-Yeop Chung"'
Autor:
Sang-Yeop Chung, Ji-Su Kim
Publikováno v:
Developments in the Built Environment, Vol 18, Iss , Pp 100390- (2024)
The interfacial transition zone (ITZ) in cement-based composites with aggregates is widely recognized as the most vulnerable component, greatly affecting their physical and mechanical properties. In this study, the effect of the ITZ characteristics o
Externí odkaz:
https://doaj.org/article/12ed53df27c74a26b797dc809ec48edc
Autor:
Pawel Sikora, Levent Afsar, Sundar Rathnarajan, Morteza Nikravan, Sang-Yeop Chung, Dietmar Stephan, Mohamed Abd Elrahman
Publikováno v:
International Journal of Concrete Structures and Materials, Vol 17, Iss 1, Pp 1-19 (2023)
Abstract The use of alternative and locally available materials is encouraged in the construction industry to improve its sustainability. Desert regions with shortages in freshwater and river sand as fine aggregates in concrete have to search for alt
Externí odkaz:
https://doaj.org/article/c4a35237fdaf4ba2b30b9b9c2b368dfe
Autor:
Yazeed A. Al-Noaimat, Mehdi Chougan, Abdulrahman Albar, Szymon Skibicki, Karol Federowicz, Marcin Hoffman, Daniel Sibera, Krzysztof Cendrowski, Mateusz Techman, João Nuno Pacheco, Sang-Yeop Chung, Pawel Sikora, Mazen Al-Kheetan, Seyed Hamidreza Ghaffar
Publikováno v:
Developments in the Built Environment, Vol 16, Iss , Pp 100248- (2023)
This study investigates the printability of one-part brick powder-based alkali-activated materials (AAMs) containing end-of-life brick particles as aggregate. The novel formulation showcases promise for 3D printing of small to medium-sized building b
Externí odkaz:
https://doaj.org/article/5e20055f348840599bc81846fc259e6a
Autor:
Karol Federowicz, Mateusz Techman, Szymon Skibicki, Mehdi Chougan, Ahmed M. El-Khayatt, H.A. Saudi, Jarosław Błyszko, Mohamed Abd Elrahman, Sang-Yeop Chung, Pawel Sikora
Publikováno v:
Materials & Design, Vol 233, Iss , Pp 112246- (2023)
The main objective of this study is to develop 3D printed heavyweight concrete (3DPHWC) to produce elements with a dry density of up to 3500 kg/m3 by replacing natural aggregate (SA) with magnetite aggregate (MA) up to 100%. A comprehensive systemati
Externí odkaz:
https://doaj.org/article/84338acf73e64d30b5a8f95cc838761b
Autor:
Pawel Sikora, Ahmed M. El-Khayatt, H. A. Saudi, Maxime Liard, Didier Lootens, Sang-Yeop Chung, Paweł Woliński, Mohamed Abd Elrahman
Publikováno v:
International Journal of Concrete Structures and Materials, Vol 17, Iss 1, Pp 1-14 (2023)
Abstract This work examines the influence of iron oxide nanoparticles (Fe3O4 NPs) on neutron and gamma-ray radiation shielding characteristics of Portland cement paste. Experimental evaluations were supplemented with theoretical studies using NXCom p
Externí odkaz:
https://doaj.org/article/626d55b51ca049db89696e30ffcdbc49
Autor:
Sang-Yeop Chung, Hyeonjong Lee, Yong Kwon Chae, Yun Sun Jung, Su-Sung Jo, Ko Eun Lee, Sung Chul Choi, Ok Hyung Nam
Publikováno v:
BMC Oral Health, Vol 22, Iss 1, Pp 1-9 (2022)
Abstract Background In clinical settings, tooth preparation for prefabricated zirconia crowns (PZCs) in the primary dentition varies widely. However, knowledge about the biomechanical behavior of PZCs in various clinical settings is limited. This stu
Externí odkaz:
https://doaj.org/article/942e7633eb1c4815be2b9533c5d7abb0
Publikováno v:
Case Studies in Construction Materials, Vol 18, Iss , Pp e01909- (2023)
This study investigated the hydration of nano-silica-incorporated cement paste using multiphase voxels in the developed CEMHYD3D model. Multiphase voxels were firstly proposed to be able to consider the effects of nano particles on cement hydration p
Externí odkaz:
https://doaj.org/article/4376c6a3a0ae465bb4df8314ebc3d3e4
Autor:
Sang-Yeop Chung, Seo-Eun Oh, Su-Sung Jo, Christian Lehmann, Jonghwa Won, Mohamed Abd Elrahman
Publikováno v:
Case Studies in Construction Materials, Vol 18, Iss , Pp e01719- (2023)
Large amounts of cement and natural aggregates are used annually to produce concrete, and the high energy consumption required for the production of these materials is considered to be a major environmental concern globally. This study investigates t
Externí odkaz:
https://doaj.org/article/a23a084b7a914257aef7578e5dc1e00d
Publikováno v:
BMC Oral Health, Vol 21, Iss 1, Pp 1-8 (2021)
Abstract Background Internal voids of materials can serve a hub for microorganism and affect the sealing ability. This study aimed to evaluate the sealing performance of calcium silicate-based cements in immature teeth treated with regenerative endod
Externí odkaz:
https://doaj.org/article/eb08089ba90b42aaa6a6c8f47c13adac
Autor:
Pawel Sikora, Mateusz Techman, Karol Federowicz, Ahmed M. El-Khayatt, H.A. Saudi, Mohamed Abd Elrahman, Marcin Hoffmann, Dietmar Stephan, Sang-Yeop Chung
Publikováno v:
Case Studies in Construction Materials, Vol 17, Iss , Pp e01320- (2022)
This study presents the comparison of microstructural and durability characteristics of 3D printed concrete (3DPC) depending on its production method (printing or casting). Printed samples with different numbers of layers, as well as a cast specimen
Externí odkaz:
https://doaj.org/article/a628c9b7ae1b4097869d12f962807bf4