Suitability of Egyptian ornamental stone calcite wastes as non-conventional aggregates in concrete
Gharieb, M., Ogala, W., Yahya, A., Gamal, A., Abd-EL-Raoof, F., elsokkary, T., Soltan, A. (2024). Suitability of Egyptian ornamental stone calcite wastes as non-conventional aggregates in concrete. EKB Journal Management System, 67(7), 275-287. doi: 10.21608/ejchem.2023.236544.8620
m Gharieb; Walid Ogala; Ahmed Yahya; Ahmed Gamal; Fawzia Abd-EL-Raoof; Tarek elsokkary; Abdel Monem Soltan. "Suitability of Egyptian ornamental stone calcite wastes as non-conventional aggregates in concrete". EKB Journal Management System, 67, 7, 2024, 275-287. doi: 10.21608/ejchem.2023.236544.8620
Gharieb, M., Ogala, W., Yahya, A., Gamal, A., Abd-EL-Raoof, F., elsokkary, T., Soltan, A. (2024). 'Suitability of Egyptian ornamental stone calcite wastes as non-conventional aggregates in concrete', EKB Journal Management System, 67(7), pp. 275-287. doi: 10.21608/ejchem.2023.236544.8620
Gharieb, M., Ogala, W., Yahya, A., Gamal, A., Abd-EL-Raoof, F., elsokkary, T., Soltan, A. Suitability of Egyptian ornamental stone calcite wastes as non-conventional aggregates in concrete. EKB Journal Management System, 2024; 67(7): 275-287. doi: 10.21608/ejchem.2023.236544.8620

Suitability of Egyptian ornamental stone calcite wastes as non-conventional aggregates in concrete

Egyptian Journal of Chemistry
Volume 67, Issue 7, July 2024, Page 275-287  XML PDF (2.44 MB)
Document Type: Original Article
DOI: 10.21608/ejchem.2023.236544.8620
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Authors
m Gharieb email 1; Walid Ogala2; Ahmed Yahyaorcid 3; Ahmed Gamal2; Fawzia Abd-EL-Raoof4; Tarek elsokkary5; Abdel Monem Soltan6
1Housing & Building National Research Center (HBRC), Egypt
2Geology Department, Faculty of Science, Ain Shams University
3Applied mineralogy group - geology department - faculty of science - Ain shams University - Cairo - Egypt
433 El Buhouth St.,Dokki, Giza , Egypt Postal Code 12622
5Housing and Building National Research Center
6Geology Department, Faculty of Science, Ain Shams University, Cairo 11566, Egypt
Abstract
The objective of this study is to investigate how the use of ornamental stone calcitic wastes as aggregate affects the mechanical properties and durability of concrete when exposed to high temperatures up to 600ºC. The concrete compositions consisted of different types of coarse aggregates: dolomite (control), calcite, and granite. A super plasticizer (SP)-type (F) was employed to lower the water/cement ratio. The physical and mechanical properties of the raw aggregates were determined, and the same properties were analyzed for the various concrete types. The impact of fire exposure up to 600ºC on the mechanical properties and microstructures of the concrete was also investigated .The results indicated that concrete mixes composed of 50% dolomite and 50% calcite, as well as 75% dolomite and 25% granite aggregate, satisfy the compressive strength requirements for normal concrete after a 28-day. When compared to the control concrete (D100), the chloride ion migration coefficient and water penetration depth slightly increased in concrete containing granite and calcite waste aggregates. Subsequently, at exposure temperatures of 300ºC, 400ºC, and 600ºC, the compressive strength values of concrete mixes incorporating granite and calcite waste aggregates exhibited a slight decrease in comparison to the control concrete (D100).
Keywords
calcitic wastes; fire resistance; granite aggregate; calcite aggregate; compressive strength; microstructure
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