ZEYNEB Hammou
حمو زينب
zeyneb.hammou@univ-msila.dz
0657961803
- Departement of Physics
- Faculty of Sciences
- Grade PHd
About Me
Sciences de la Matière
Research Domains
فيزياء المواد المكثفة
LocationMsila, Msila
Msila, ALGERIA
Code RFIDE- 1996-03-18 00:00:00
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ZEYNEB Hammou birthday
- 2024-11-18
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2024-11-18
The effect of quartz on natural fluorapatite decomposition during the preparation of calcium sulfoaluminate‑based multiphase composites
In the research described in this paper, we prepared low-cost multiphase composites based on calcium sulfoaluminate (also known as ye’elimite) and fluorapatite. By utilizing the CaO originally present in fluorapatite, the sintering densification of these composites was enhanced. The influence of varying the SiO2 content (0–5.4 wt.%) on the reactive sintering of fluorapatite, bauxite, and gypsum was investigated. Incorporating quartz led to the formation of various compositions, including calcium hexaluminate, fluorapatite, ye’elimite, and gehlenite. Quantitative phase analysis, conducted using the Rietveld method via Profex software at various sintering temperatures, demonstrated a relationship between quartz content and the preferential formation of gehlenite over ye’elimite within the 1300–1350 °C range. Additionally, the microstructure of the composites was significantly modified by quartz addition, leading to the development of hexagonal and circular grains after heat treatment at 1400 °C.
Citation
ZEYNEB Hammou , Hocine BELHOUCHET , , (2024-11-18), The effect of quartz on natural fluorapatite decomposition during the preparation of calcium sulfoaluminate‑based multiphase composites, Materials and Structures, Vol:57, Issue:234, pages:15, Springer Nature Link
- 2022
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2022
Preparation and characterization of yeelimite from local materials
Due to the increase in demand for cement in recent decades, the research has tended to the eco-cements such as Yeelimite, which is distinguished from other cements by its low carbon emissions. Calcium sulfoaluminate (CSA) cement or yeelimite belongs to the family of cements that have certain advantages over Portland cement (PC): low sintering temperature, reduced CO2 emissions, fast hardening and low shrinkage. The main components of CSA cement are yeelimite (C4A3S in cement notation where C=CaO, A=Al2O3, S=SO3). CSA cement has been used in many applications, such as bridge decks, pipes, concrete, etc. The objective of this work is the preparation and characterization of Yeelimite-based materials from local materials (natural phosphate from Djebel el-Onk), then the study of the physico-chemical and mechanical properties of the prepared materials. On the other hand, different experimental techniques, including density, porosity, shrinkage, Vickers hardness, XRD were used to analyse the formation and transformation of various phases at different temperatures. Through these results, we lighted the possibility of preparing the yeelimite from local materials (natural phosphate). Key-words: Yeelimite, Portland cement, Natural phosphate, Low CO2 emissions.
Citation
ZEYNEB Hammou , Hocine BELHOUCHET , ,(2022), Preparation and characterization of yeelimite from local materials,The first International Seminar on Materials Synthesis and Environmental Monitoring,university of kasdi merbah ouargla