Zobrazeno 1 - 10
of 103
pro vyhledávání: '"Haitham M. Ahmed"'
Autor:
Haitham M. Ahmed, Adel Ahmadihosseini, Ferri Hassani, Mohammed A. Hefni, HussinA.M. Ahmed, Hussein A. Saleem, Essam B. Moustafa, Agus P. Sasmito
Publikováno v:
Journal of Rock Mechanics and Geotechnical Engineering, Vol 15, Iss 10, Pp 2483-2495 (2023)
Despite the extensive studies conducted on the effectiveness of microwave treatment as a novel rock pre-conditioning method, there is yet to find reliable data on the rock failure mechanisms due to microwave heating. In addition, there is no signific
Externí odkaz:
https://doaj.org/article/f62927d47f974fc88319c572af0cd9c8
Publikováno v:
Rudarsko-geološko-naftni Zbornik, Vol 37, Iss 2, Pp 171-177 (2022)
The size of grinding media is the primary factor that affects the overall milling efficiency of a ball mill (e.g. power consumption and particle size breakage). This article tackles the lack of a design tool that could help choose the ball loading co
Externí odkaz:
https://doaj.org/article/b767e5cd635049dd9ee5239df33b1120
Autor:
Emad Ghandourah, Hitesh Panchal, Othman Fallatah, Haitham M. Ahmed, Essam B. Moustafa, Ammar H. Elsheikh
Publikováno v:
Case Studies in Thermal Engineering, Vol 35, Iss , Pp 101966- (2022)
Solar energy is utilized to convert brackish or saline water into drinking water in solar stills. Recent years have seen a lot of attention paid to developing new designs for solar stills to overcome the constraints of the lower yield. Pyramid solar
Externí odkaz:
https://doaj.org/article/add3d24794f046e6a85cfa080ff46cbe
Publikováno v:
Buildings, Vol 13, Iss 2, p 568 (2023)
This study investigates the effect of the partial replacement of ordinary Portland cement (OPC) with cement kiln dust (CKD) on the engineering properties of pozzolanic concrete for use in block manufacturing. Ultimately, this could potentially reduce
Externí odkaz:
https://doaj.org/article/dee8f6d30fb34d958ea5af79b4456032
Autor:
Haitham M. Ahmed, Mohammed A. Hefni, Hussin A. M. Ahmed, Sefiu O. Adewuyi, Ferri Hassani, Agus P. Sasmito, Hussein A. Saleem, Essam B. Moustafa, Gamal S. A. Hassan
Publikováno v:
Materials, Vol 15, Iss 9, p 3204 (2022)
The effect of high temperatures on rock’s thermophysical and mechanical properties is critical to the design of underground geotechnical applications. The current work investigates the impact of temperature on rhyolitic turf rock’s physical and m
Externí odkaz:
https://doaj.org/article/55e21b3b32f846d2a55dcaa4ed15771e
Autor:
Essam B. Moustafa, Mashhour A. Alazwari, Waheed Sami Abushanab, Emad Ismat Ghandourah, Ahmed O. Mosleh, Haitham M. Ahmed, Mohamed A. Taha
Publikováno v:
Materials, Vol 15, Iss 3, p 835 (2022)
In this study, two successive methods were used to improve the grain structure and the mechanical and physical properties of Al 5052 aluminum alloy. The modifying elements, 0.99 wt.% of titanium (Ti) and 0.2 wt.% of boron (B), were added during the c
Externí odkaz:
https://doaj.org/article/36848f8b059e46d6a8037e2295d05852
Publikováno v:
Applied Sciences, Vol 11, Iss 23, p 11357 (2021)
Pyrophyllite (Al2Si4O10(OH)2) is a phyllosilicate often associated with quartz, mica, kaolinite, epidote, and rutile minerals. In its pure state, pyrophyllite exhibits unique properties such as low thermal and electrical conductivity, high refractive
Externí odkaz:
https://doaj.org/article/5c8febc79d4243f8ba66a75ec7f17a0e
Autor:
Mohammed A. Hefni, Minghan Xu, Ferri Hassani, Seyed Ali Ghoreishi-Madiseh, Haitham M. Ahmed, Hussein A. Saleem, Hussin A. M. Ahmed, Gamal S. A. Hassan, Khaled I. Ahmed, Agus P. Sasmito
Publikováno v:
Applied Sciences, Vol 11, Iss 21, p 10338 (2021)
With the increasing engineering applications of geothermal borehole heat exchangers (BHEs), accurate and reliable mathematical models can help advance their thermal design and operations. In this study, an analytical model with a time-dependent heat
Externí odkaz:
https://doaj.org/article/09993cb8ac2e40fd91e79abdd7635665
Publikováno v:
Metals, Vol 11, Iss 11, p 1825 (2021)
In this investigation, aluminium Al-2.5% Mg cast alloy was modified by adding 0.5 Ti and 0.1 B wt % modifiers to investigate their impact on the dynamic behaviour, as well as the mechanical and microstructure properties. The dynamic properties were a
Externí odkaz:
https://doaj.org/article/dadbfd04c01d48fd8ac90a15b6b0f607
Publikováno v:
Energies, Vol 14, Iss 22, p 7612 (2021)
Rocks’ physical, mechanical, and mineralogical properties are essential in the design process of underground applications. To understand changes in these rocks’ properties at high temperatures, numerous studies have been conducted on several rock
Externí odkaz:
https://doaj.org/article/57a88bbae1be4da7bdf505773206b252