Publications by authors named "H A Abdel-Gawwad"

Article Synopsis
  • The study investigates how low-quality calcined Fanja (FNJ) clay influences the performance of cured cement mortar (CM), particularly against chloride and sulfuric acid aggression.
  • Various percentages (10%, 25%, 35%, and 50%) of FNJ, calcined at different temperatures (620 °C, 760 °C, and 900 °C), were tested, revealing that FNJ900 samples demonstrated the best physical and mechanical properties.
  • The presence of hematite in the calcined clay enhanced strength and acid resistance, making CM-FNJ760 the preferred option for sustainable construction due to its high strength index and lower environmental impact compared to CM-FNJ900.
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Although calcined clay-blended cement offers higher performance and durability compared to neat Portland cement (PC), its extensive use of natural clay leads to the depletion of natural non-renewable resources. To address this concern, this study focuses on the utilization of supplementary cementitious materials-based waste products as a substitute for PC. The blended cement was optimized with a low replacement level of 10 wt.

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This study reports the full recycling of dolomite waste (DW) in the fabrication of a novel cementitious material through a facile and eco-efficient method. The proposed technique includes mixing different alkali-activators (i.e.

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Many research articles and reviews have recognized alkali-activated materials (AAMs) as eco-friendly alternative binders to ordinary Portland cement (OPC) due to their economic andenvironmental advantages. However, few literature surveys reported the physical, mechanical and microstructural changes that occur after the exposure of AAMs to elevated temperatures. Owing to the wide diversity in the properties of aluminosilicates, alkali-activation conditions, and additives, a deep survey is needed to understand how different factors can affect the performance of AAMs under elevated temperatures.

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This study reports a potential approach for the valorization of glass waste (GW) that is mainly composed of amorphous silica to prepare lightweight foamed glass (FG). The preparation of FG was achieved by mixing sodium hydroxide with GW powder followed by sintering at a temperature of 800 °C. As-synthesized FG was characterized and applied as an effective adsorbent for the removal of hazardous organic water contaminants, in particular, methylene blue (MB) dye.

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