4 results for “Randa M. Osman”

Research ArticleOpen accessIn the author namesAnaerobic Digestion of Pulping Wastewater Using Up-flow Anaerobic Sludge Blanket (UASB) Reactor at Mesophilic ConditionRanda M. Osman, M. HamadThe waste considered for this study was the effluent of the pulping process produced during the manufacture of pulp and paper in the Rakta integrated pulp and paper mill in Alexandria. The pulping process in Rakta mill is conducted under pressure of 7-8 bar, 165°C using 10% NaOH based on straw weight for 2 h. The spent liquor after alkali … …OnLine Journal of Biological Sciences, Vol. 15, Issue 3 · 11 Aug 2015 · 6,927 accessesView PDF Cite

Research ArticleOpen accessIn the author namesBasalt as Pozzolana and Filler in Ordinary Portland CementH. El-Didamony, I.M. Helmy, Randa M. Osman, A.M. HabboudPozzolana is defined as a siliceous or siliceous and aluminous materials which in itself possess little or no cementing properties, but will in a finally divided form and in the presence of moisture react with Ca(OH)2 at ordinary temperature to form compound possessing cementious properties. Pozzolanic cement contains Portland cement as one of their main components in addition to natural … …American Journal of Engineering and Applied Sciences, Vol. 8, Issue 2 · 24 Jun 2015 · 7,904 accessesView PDF Cite

Research ArticleOpen accessIn the author namesEffect of Sulfonated Acetone Formaldehyde (SAF) on the Firing Resistance and Aggressive Attach of SRC-SF Composite Cement PastesRanda M. Osman, S. Al-MasryThis work aimed to study the effect of the dosage of laboratory synthesized Sulfonated Acetone Formaldehyde (SAF) on the physic-mechanical characteristics and durability of SF-SRC cement pastes immersed in 4% MgCl2 or 4% MgSO4 solutions or at elevated temperatures up to 800°C. The compressive strength of thermally treatment cement pastes with 1.5% SAF increases up to 600°C, then decreases up … …American Journal of Engineering and Applied Sciences, Vol. 8, Issue 2 · 22 Jun 2015 · 7,137 accessesView PDF Cite