Study of the influence of natural pozzolan parameters on the strength of mortars based composite cements [Etude de l'influence des paramètres de la pouzzolane naturelle sur la résistance mécanique des mortiers à base de ciments composés]

The valorization of additions cementitious as pozzolan (active addition),is currently one of the most recent developments in the production of cement,because its use is an improvement on the mechanical properties of cementitious materials (mortar and concrete). its general use reduces consumption of clinker,contribute to solve economically and environmental problems such as: - reduce the emission of co2 from cement production operations - control the environmental impact of products over their entire life cycle. the main objective of this work is to study the possibilities of obtaining other cements elaborated with natural pozzolan,these additions are available in large quantities in algeria. in the past,several studies have been the subject of extensive research in order to upgrade the pozzolan in the preparation of cement paste,pozzolanic mortars and concretes. our experimental work investigates the advantages and the possibility of partial replacement of cement by natural pozzolan in the mortar,six mortar mixtures: one specimen with portland cement (control) and five mixtures with 20%,30%,35%,40% and 50% of replacement of cement by pozzolan were tested. the results of this research confirm that the use of pozzolan at 20% and 30% of the weight of cement contribute to improve the sustainability of construction.