Author
H. Shoukry
Other affiliations: Center for Advanced Materials, Sultan Qaboos University, King Saud University
Bio: H. Shoukry is an academic researcher from King Khalid University. The author has contributed to research in topics: Compressive strength & Cement. The author has an hindex of 11, co-authored 25 publications receiving 358 citations. Previous affiliations of H. Shoukry include Center for Advanced Materials & Sultan Qaboos University.
Topics: Compressive strength, Cement, Metakaolin, Mortar, Materials science
Papers
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TL;DR: In this paper, the influence of nano metakaolin (NMK) on physical, mechanical and microstructural properties of high volume vermiculite blended white Portland cement (WPC) was presented.
55 citations
TL;DR: In this article, the authors investigated the effect of the prepared nanostructured materials on compressive strength and capillary water absorption (sorptivity) of mortars.
52 citations
TL;DR: In this paper, a simple, low temperature and rapid microwave-assisted synthesis of undoped and Gadolinium (III) doped lead iodide with different morphologies was reported, i.e. nanorods of average diameter ~200nm and hierarchical (flower-shaped) nanosheets of thickness less than 100nm.
Abstract: In this work, we report the simple, low temperature and rapid microwave-assisted synthesis of undoped and Gadolinium (III) doped lead iodide with different morphologies, i.e. nanorods of average diameter ~200 nm and hierarchical (flower-shaped) nanosheets of thicknesses less than 100 nm. Prepared nanostructures were typify in details using a variety of analytical techniques that reveal the well crystallinity with hexagonal structure. We found that by changing the concentrations of Gadolinium (III) one can tailor the size and shape of nanostructures of lead iodide. The presence of Gadolinium (III) doping was assessed by energy dispersive X-ray analysis. Optical band gap and Photoluminescence intensity are found to be enhanced due to Gadolinium (III) doping. The value of Gamma linear absorption coefficient is found to be enriched with doping, which suggests its application in radiation detection.
51 citations
TL;DR: In this article, the role of nano metakaolin (NMK) for enhancing the flexural strength and reducing the capillary water absorption of fiber-reinforced cementitious composites (FRCCs) for building surface plastering was investigated.
43 citations
TL;DR: The use of nano materials as partial replacement for cement has been considered all over the world, particularly in the production of high strength and high performance cement based structures as discussed by the authors, where nano-scale metakaolin (NMK) has been used as a filler to improve the packing inside the cementitious matrix, but also as an activator to promote hydration and pozzolanic reactions.
40 citations
Cited by
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31 Oct 2001
TL;DR: The American Society for Testing and Materials (ASTM) as mentioned in this paper is an independent organization devoted to the development of standards for testing and materials, and is a member of IEEE 802.11.
Abstract: The American Society for Testing and Materials (ASTM) is an independent organization devoted to the development of standards.
3,792 citations
Journal Article•
TL;DR: In this article, a comprehensive review of the state-of-the-art research activities in the field of inorganic semiconductor nanostructures is presented, which mainly focuses on the most widely studied inorganic nano-structures, such as ZnO, ZnS, Si, WO3, AlN, SiC and their field-emission properties.
Abstract: Inorganic semiconductor nanostructures are ideal systems for exploring a large number of novel phenomena at the nanoscale and investigating the size and dimensionality dependence of their properties for potential applications. The use of such nanostructures with tailored geometries as building blocks is also expected to play crucial roles in future nanodevices. Since the discovery of carbon nanotubes much attention has been paid to exploring the usage of inorganic semiconductor nanostructures as field-emitters due to their low work functions, high aspect ratios and mechanical stabilities, and high electrical and thermal conductivities. This article provides a comprehensive review of the state-of-the-art research activities in the field. It mainly focuses on the most widely studied inorganic nanostructures, such as ZnO, ZnS, Si, WO3, AlN, SiC, and their field-emission properties. We begin with a survey of inorganic semiconductor nanostructures and the field-emission principle, and then discuss the recent progresses on several kinds of important nanostructures and their field-emission characteristics in detail and overview some additional inorganic semiconducting nanomaterials in short. Finally, we conclude this review with some perspectives and outlook on the future developments in this area.
528 citations
TL;DR: In this paper, the authors discussed on the nano materials in concrete and presented on the advantages and benefits to enhance the concrete by utilizing nano materials, which can reduce the formation of micro pores by acting as a filler agent, producing a very dense concrete and automatically reducing the growth of micro pore in the UHPC structures.
338 citations
TL;DR: In this paper, the authors present a review of thermal insulation materials used in the construction industry, focusing on researches utilized of renewable resources and wastes in thermal insulations development, and the light was shed on the composites materials which was developed as a construction material with high thermal insulation capacity.
268 citations
TL;DR: SEM study confirm the formation of nanorods and single crystal nanosheets of very few nanometers in size and relaxed nanostructure formation and occurrence of confinement effect in Nd3+ doped PbI2 synthesized via microwave-assisted technique.
Abstract: Hexagonal single crystal nanosheets of Nd3+ doped PbI2 were effortlessly synthesized via microwave-assisted technique under a power of 700 W and in a duration of 15 minutes with a homogeneous morphology. X-ray diffraction, energy dispersive X-ray spectroscope, scanning electron microscope, FT-Raman, UV-Visible, photoluminescence and dielectric measurement were employed to study the product. High purity, single phase and presence of Nd3+ doping was confirmed. SEM study confirm the formation of nanorods and single crystal nanosheets of very few nanometers in size. Robust vibrational analysis has been carried out and the observed bands are assigned to the vibration modes of E21, A11, A12, 2E21 and 2E11, respectively. These bands are red-shifted when compare to the corresponding bulk values which indicate relaxed nanostructure formation and occurrence of confinement effect. The thickness of the synthesized single crystal nanosheets are found to be in the range of ~20 to 30 nm. The energy band gap was calculated and found to be 3.35, 3.34, 3.42 and 3.39 eV for pure, 1, 3 and 5% Nd3+ doped lead iodide, respectively. The clear blue luminescence has been observed at 440 nm and 466 nm when excited at 250 nm and 280 nm respectively. Dielectric and ac electrical conductivity was also measured and discussed.
189 citations