Role of Low-cost Nano RHA on Physico-mechanical Properties of Cement Mortar
Mostafa, M., Salah, H., Shehata, N. (2020). Role of Low-cost Nano RHA on Physico-mechanical Properties of Cement Mortar. EKB Journal Management System, 63(3), 1045-1054. doi: 10.21608/ejchem.2019.12487.1777
Medhat Mostafa; Hamdy Salah; Nabila Shehata. "Role of Low-cost Nano RHA on Physico-mechanical Properties of Cement Mortar". EKB Journal Management System, 63, 3, 2020, 1045-1054. doi: 10.21608/ejchem.2019.12487.1777
Mostafa, M., Salah, H., Shehata, N. (2020). 'Role of Low-cost Nano RHA on Physico-mechanical Properties of Cement Mortar', EKB Journal Management System, 63(3), pp. 1045-1054. doi: 10.21608/ejchem.2019.12487.1777
Mostafa, M., Salah, H., Shehata, N. Role of Low-cost Nano RHA on Physico-mechanical Properties of Cement Mortar. EKB Journal Management System, 2020; 63(3): 1045-1054. doi: 10.21608/ejchem.2019.12487.1777

Role of Low-cost Nano RHA on Physico-mechanical Properties of Cement Mortar

Egyptian Journal of Chemistry
Article 96, Volume 63, Issue 3, March 2020, Page 1045-1054  XML PDF (1.77 MB)
Document Type: Original Article
DOI: 10.21608/ejchem.2019.12487.1777
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Authors
Medhat Mostafa1, 2; Hamdy Salah3; Nabila Shehata email 4
1Department of Environmental Science and Industrial Development, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, Egypt
2Assiut Cement Company, CEMEX Egypt, Assiut, Egypt.
3Minia White Cement Plant, Heidelberg Cement Group, ElMinya, Egypt.
4Department of Environmental Science and Industrial Development, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, Egypt.
Abstract
THIS WORK compares nano-structured rice husk ash (RHA) before grinding and nano-sized RHA after grinding in terms of the physical properties of cement and mortar performance. Blaine surface area, sieve analysis (45 μm mesh), water of consistency, expansion, initial and final setting time, and compressive strength (at 2, 7, 28, 60 and 90 d of curing) measurements were performed for 0, 2, 4, 6, 8 and 10% RHA replacement of cement by weight. RHA both before and after grinding enhanced the cement physical and mechanical properties, as well as the mortar performance in terms of the long-term aged strength, at a constant water/cement ratio and without the use of any type of super-plasticizer (SP). The enhancement became stable at all long-term ages for 10% replacement in the case of RHA before grinding and 4% replacement in the case of RHA after grinding. More considerable enhancements were observed with a high replacement percentage up to 10% nano-sized RHA due to the small size of its particles, which increased the pozzolanic reactivity and worked as a filler material to produce a denser mortar.
Keywords
Cement mortar; Low-cost; Nano; Rice husk ash
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