Composite cement mortars based on marine sediments and oyster shell powder


  • H. Ez-zaki Faculté des Sciences Université Mohammed V
  • A. Diouri Faculté des Sciences Université Mohammed V
  • S. Kamali-Bernard Institut National des Sciences Appliquées, Université Européenne de Bretagne
  • O. Sassi Ecole Normale Supérieure, Université Mohammed V



Characterization, Hydration, Calorimetry, Mortar, Durability


Additions of dredged marine sediments and oyster shell powder (OS) as cement substitute materials in mortars are examined by several techniques. The sediments have high water and chloride contents and calcite, quartz, illite and kaolinite as principal minerals. The OS powders are entirely composed of calcium carbonate and traces of other impurities. Four mixtures of treated sediments and OS powders at 650 °C and 850 °C are added to Portland cement at 8%, 16% and 33% by weight. The hydration of composite pastes is followed by calorimetric tests, the porosity accessible to water, the bulk density, the permeability to gas, the compressive strength and the accelerated carbonation resistance are measured. In general, the increase of addition amounts reduced the performance of mortars. However, a reduction of gas permeability was observed when the addition was up to 33%. Around 16% of addition, the compressive strength and carbonation resistance were improved.


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How to Cite

Ez-zaki, H., Diouri, A., Kamali-Bernard, S., & Sassi, O. (2016). Composite cement mortars based on marine sediments and oyster shell powder. Materiales De Construcción, 66(321), e080.



Research Articles