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      • Effects of glass powder on the characteristics of concrete subjected to high temperatures

        Belouadah, Messaouda,Rahmouni, Zine El Abidine,Tebbal, Nadia Techno-Press 2018 Advances in concrete construction Vol.6 No.3

        This paper presents an experimental investigation on the performance of concrete with and without glass powder (GP) subjected to elevated temperatures. Mechanical and physicochemical properties of concretes were studied at both ambient and high temperatures. One of the major environmental concerns is disposal or recycling of the waste materials. However, a high volume of the industrial production has generated a considerable amount of waste materials which have a number of adverse impacts on the environment. Further, use of glass or by-products in concrete production has advantages for improving some or all of the concrete properties. The economic incentives and environmental benefits in terms of reduced carbon footprint are also the reason for using wastes in concrete. The occurrence of spalling, compressive strength, mass loss, chemical composition, crystalline phase, and thermal analysis of CPG before and after exposure to various temperatures (20, 200, 400, and $600^{\circ}C$) were comprehensively investigated. The results indicated that, the critical temperature range of CPG was between $400^{\circ}C$ and $600^{\circ}C$.

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        Testing the Information Content of Sustainability Reports for Telecommunications Companies in the Kingdom of Saudi Arabia

        DIFALLA, Samhi Abdelaty,BELOUADAH, Fateh Korea Distribution Science Association 2022 The Journal of Asian Finance, Economics and Busine Vol.9 No.10

        This study aims to test the information content of sustainability reports issued by the most significant telecommunications companies operating in the Kingdom of Saudi Arabia (Stc, Zain, and Mobily), and their compatibility with the national sustainability standards issued by the Ministry of Commerce in the Kingdom of Saudi Arabia in light of the Kingdom's vision 2030, and its impact on the stock exchange indices of these companies. The event study methodology was used to study the impact of publishing sustainability reports on stock prices and the trading volume of these companies' shares in the Saudi stock market during the period from (October 2020 to March 2021). The results indicate a significant impact of the information contained in the sustainability reports on stock prices and trading volume in the stock market, and the importance of directing the company's management towards more disclosure of information about sustainability in its environmental, social, and economic aspects instead of focusing only on information related to the financial performance and economic activity of the company. This encourages the listed companies to disclose the sustainability of the financial reports and standardize the form in which these disclosures are prepared.

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