Techno Press
You logged in as Techno Press

Advances in Concrete Construction
  Volume 13, Number 4, April 2022 , pages 315-325
DOI: https://doi.org/10.12989/acc.2022.13.4.315
 


Effectiveness study of a cement mortar coating based on dune sand on the carbonation of concrete
Youssef Korichi, Ahmed Merah, Med Mouldi Khenfer and Benharzallah Krobba

 
Abstract
    Reinforced concrete structures are exposed throughout their lifetime to the phenomenon of carbonation, which considerably influences their durability by causing corrosion of the reinforcements. The fight against this phenomenon is usually ensured by anti-carbonation coatings which have the possibility of limiting the permeability to carbon dioxide or with coatings which absorb the CO2 present in the air. A coating with good crack-bridging (sealing) capacity will prevent water from entering through existing cracks in concrete. Despite the beneficial effect of these coatings, their durability decreases considerably over time with temperature and humidity. In order to use coatings made from local materials, not presenting any danger, available in abundance in our country, very economical and easy to operate is the main objective of this work. This paper aim is to contribute to the formulation of a corrected dune sand-based mortar as an anti-carbonation coating for concrete. The results obtained show that the cement mortar based on dune sand formulated has a very satisfactory compressive strength, a very low water porosity compared to ordinary cement mortar and that this mortar allows an improvement in the protection of the concrete against the carbonation of 60% compared to ordinary cement mortar based on alluvial sand. Moreover, the formulated cement mortars based on dune sand have good adhesion to the concrete support, their adhesion strengths are greater than 1.5MPa recommended by the standards.
 
Key Words
    adhesion; alluvial sand; anti-carbonation coating; carbonation; concrete; corrosion; dune sand; mortar; sustainability
 
Address
Youssef Korichi: Civil Engineering Research Laboratory, Ammar Thélidji University of Laghouat, Algeria
Ahmed Merah: Civil Engineering Research Laboratory, Ammar Thélidji University of Laghouat, Algeria
Med Mouldi Khenfer: Civil Engineering Research Laboratory, Ammar Thélidji University of Laghouat, Algeria
Benharzallah Krobba: Structure Rehabilitation and Materials Laboratory (SREML), Ammar Thélidji University of Laghouat, Algeria
 
References
    -acc1304004-
 

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2023 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: info@techno-press.com