Development a cement mortar based on dune sand used as an anti-carbonation coating of concrete

摘要

Reinforced concrete structures are exposed throughout their life to the carbonation process due to the inevitable presence of CO2 in the air, which causes corrosion of the reinforcements. In order to limit these harmful effects on reinforced concrete structures, anti-carbonation coatings are used. The purpose of these coatings is to limit the permeability of the embedding concrete to carbon dioxide. Each of these coatings has durability performance in terms of protection against this phenomenon. The main objective of this work is to study the effectiveness of a corrected mortar coating based on dune sand as an anti-carbonation coating of concrete using local materials, not presenting any danger, available in abundance in our countries. The obtained results clearly show that the formulated mortar has a very satisfactory compressive strength, a very low water porosity and the carbonation resistance is increases with the rate 60 compared to ordinary cement mortar based on alluvial sand.