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<p>This work focuses on the influence of the mineralogical composition of aggregates from quarries on physical–mechanical, microstructural and durability properties of mortar. Two aggregates were obtained from the artisanal quarries at Ngaoubélé and Tchabal, and one from the industrial quarry at Bini-Warak, all located in Cameroon and of different lithologies. Mortar formulations were carried out to study their physical–mechanical, thermal, mineralogical, microstructural and durability properties. The results show that the compressive strength at 28 days of the Bini-Warak mortar (48.4 MPa) has a higher value compared to the Ngaoubélé (45.77 MPa) and Tchabal (31.5 MPa) mortars. Mineralogical analyses show that the Bini-Warak mortar is rich in hard minerals (plagioclase, pyroxene and iron oxide) which would promote the overall strength of the composite, thus reinforcing its microstructural, strength and durability. On the other hand, the mineralogy of the Ngaoubélé mortar and the Tchabal mortar revealed an environment rich in carbonate and alkaline feldspars, less hard minerals, contributing to the average resistances encountered. Dehydroxylation, dehydration, and rapid decomposition were observed in the Bini-Warak mortars to the detriment of the Tchabal and Ngaoubélé mortars. This shows that their thermal behavior and durability are strongly linked to the mineralogical nature of their aggregates.</p>

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Influence of the Mineralogical Composition of Aggregates from Quarries on Physical–Mechanical, Microstructural and Durability Properties of Mortar

  • 期刊论文

  • 发表日期：

    2025年8月9日

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  • Seunkole Bila Lamou,
  • Mambou Ngueyep Luc Leroy,
  • Manjia Marcelline Blanche,
  • Mache Jacques Richard,
  • Tiegoum Wembe Japhet,
  • Emmanuel Elat,
  • Prosper Pliyad,
  • Kamseu Elie

摘要

This work focuses on the influence of the mineralogical composition of aggregates from quarries on physical–mechanical, microstructural and durability properties of mortar. Two aggregates were obtained from the artisanal quarries at Ngaoubélé and Tchabal, and one from the industrial quarry at Bini-Warak, all located in Cameroon and of different lithologies. Mortar formulations were carried out to study their physical–mechanical, thermal, mineralogical, microstructural and durability properties. The results show that the compressive strength at 28 days of the Bini-Warak mortar (48.4 MPa) has a higher value compared to the Ngaoubélé (45.77 MPa) and Tchabal (31.5 MPa) mortars. Mineralogical analyses show that the Bini-Warak mortar is rich in hard minerals (plagioclase, pyroxene and iron oxide) which would promote the overall strength of the composite, thus reinforcing its microstructural, strength and durability. On the other hand, the mineralogy of the Ngaoubélé mortar and the Tchabal mortar revealed an environment rich in carbonate and alkaline feldspars, less hard minerals, contributing to the average resistances encountered. Dehydroxylation, dehydration, and rapid decomposition were observed in the Bini-Warak mortars to the detriment of the Tchabal and Ngaoubélé mortars. This shows that their thermal behavior and durability are strongly linked to the mineralogical nature of their aggregates.