Abstract The industrial renaissance of the General Arab countries and the Libyan Arab country to make a special request to the elements and lounges stereochemistry of metal accessories and urgent, this renaissance that accompanied the technological revolution represented by using a computer and the diversity of its programs and the expansion of research methods and knowledge in various disciplines imposed on the engineers and industrialists and Almquaoliyn various categories of specialists, and that Ioakpo this international scientific development to be desired and decent level before this data. Where highlights of this research shed light on the installations steric mineral reviewing the characteristics of the analysis and structural design and methods of the basic implementation and relations of reciprocity between them and listed in a simple way and classified according to their constituent elements, to provide those interested in this field, among the main outlines of which need them in this special geometric way. Our goal in this research to the definition of mineral spatial installations, the basics of analysis, design and construction of major roads for this type of installations. Which we hope to contribute to simplify the development and understanding of the specific platform for this type of construction.
نبيل موسى الدليمي (2014)

Download PDF Research Article - Civil EngineeringPublished: 31 July 2019Investigation on Mode I Fracture Behavior of Hybrid Fiber-Reinforced Geopolymer CompositesNeha P. Asrani, G. Murali, […]K. Karthikeyan  Arabian Journal for Science and Engineering volume 44, pages8545–8555(2019)Cite this article 225 Accesses 4 Citations Metricsdetails Abstract Recent reports in the literature have shown that fiber-reinforced geopolymer composites (FRGC) made with monofibers exhibit a significant enhancement in fracture energy. However, many aspects of the fracture performance of hybrid fiber-reinforced geopolymer composites (HFRGC) remain largely unexploited, and these are predominant for the structures. For the first time, the mode I fracture energy of HFRGC is investigated. The mode I behavior was assessed using pre-notched beams in accordance with the RILEM three-point bending test. Five different HFRGC mixtures were prepared using three fiber types: steel, polypropylene and glass (SF, PF and GF). The parameters of the pre-notched beam in flexure tested in this study were the first crack and peak load, crack mouth opening displacement at the first crack load and peak load, equivalent tensile strength, post-peak slope, reinforcing index, residual tensile strength and fracture energy. The results reveal that there is a positive interaction amidst the fibers in geopolymer composites that leads to an enhancement in the mode I fracture energy compared to the reference specimen. This study probes the influence of novel HFRGC while producing high-quality concrete, which can then be leveraged for sustainable infrastructure and various civil engineering works. arabic 15 English 79
Hakim Salem Abdelgader Abdelgader (7-2019)

This document presents recommended methods and procedures for measuring, mixing, transporting, and placing heavyweight concretes that are used principally for radiation shielding in nuclear construction. Also covered are recommendations on cement, heavy- weight aggregates, water, and admixtures. Mixture proportioning of heavyweight concrete is discussed. Mixing equipment, form construction, placing procedures, and methods of consolidation are described. Quality control, inspection, and testing are empha- sized, and a list of references is included. Preplaced heavyweight concrete is not discussed in this version of 304.3R. It is covered in the 2004 version of the document.
Hakim S. Abdelgader (12-2020)