Physico-Chemical Properties of Ordinary Portland Cement Pastes after Partial Substitution of Gypsum with Thermally Treatment Phosphogypsum
Publish place: Advanced Journal of Chemistry-Section A، Vol: 3، Issue: 3
Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_AJCS-3-3_008
تاریخ نمایه سازی: 28 فروردین 1399
Abstract:
The present study conducted to investigate the potential use of PG in cement industry. This was accomplished by preparing mortar mixes contain Portland cement clinker (PPC) with thermally treated PG at different temperatures (200, 400, 600, 800 and 1000 °C) instead of raw gypsum (RG) at different proportions. The characteristics of prepared mortars were investigated after curing in water for different periods (3, 7, 28 and 90 days) by determination of setting time, compressive strength, bulk density, and total porosity. The hydration kinetics was evaluated by determination of free lime and chemically combined water contents. FTIR spectroscopic analysis was used to investigate the change in structure of some mortars after curing. The change in morphology and microstructure of hardened pastes was investigated using scanning electron microscopy (SEM). The results approved the possibility for the utilization of treated PG at 800 and 1000 °C instead of raw gypsum in cement industry.
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Authors
Mahmoud Ahmed Taher
Department of Chemistry,Faculty of Science, Al-Azhar University, Assiut, Egypt
Adel Mohamed Amine
Housing and Building National Research Center, Cairo, Egypt
Bassam Khalaf Damarany
Manaseer cement and mining company, Jordan, Jordan |Department of Chemistry,Faculty of Science, Al-Azhar University, Assiut, Egypt
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