Valorisation of oyster shell powder in mortars as partial replacement of cement

  • Dalal Badreddine Universit√© Paris Saclay, ENS Paris Saclay - LMT
  • Alexandra Bourdot
  • Joe Maalouf
  • Olivier Rateau
  • Kamilia Abhari
  • Nassim Sebaibi
Keywords: Oyster shell powder ; Replacement of cement ; mechanical properties of mortars


The reuse of waste materials in concrete has been a major research concern in the past decades. This process has an interesting ecological and economical impact. In this paper, the recycling of shell waste into a filling material in mortars is investigated. Shell-based products have the advantage of being porous; therefore, their use could improve the thermal insulation properties of the concrete. In this paper, The influence of the incorporation of oyster shell powder as a substitution of cement on the mechanical behavior of the mortars is determined. Mortars were made by replacing a part of the Portland cement by shell powder and characterized in terms of mechanical properties. The study revealed that the substitution of cement with oyster shell powder causes a decrease of their mechanical properties. However, it increases the open porosity of the mortars, reducing their thermal conductivity and giving them good insulation properties.  

How to Cite
Badreddine, D., Bourdot, A., Maalouf, J., Rateau, O., Abhari, K., & Sebaibi, N. (2020). Valorisation of oyster shell powder in mortars as partial replacement of cement. Academic Journal of Civil Engineering, 38(1), 157-160.