Evolution of durability and mechanical properties of ordinary portland cement concretes in sulphates attack

Authors

  • Zaidi Narimane Department of Mechanical engineering, Sciences and technologies Faculty, University of Abbas Laghrour, 40004 Khenchela
  • Hamma Zedira Department of Mechanical engineering, Sciences and technologies Faculty, University of Abbas Laghrour, 40004 Khenchela, Algeria
  • J.P. Castro-Gomez C-MADE, Centre of Materials and Building Technologies, Department of Civil Engineering and Architecture, University of Beira Interior, 6201-001 Covilhã, Portugal 3URMPE, Materials, Processes and Environment
  • Boudjema Bezzazi URMPE, Materials, Processes and Environment Research Unit, University of M'Hamed Bougara, 35005 Boumerdes, Algeria
  • Aissa Talah LBE, Built Environment Research Laboratory, University of Science and Technology, 16111 Algiers, Algeria
  • Mohammed Amin Benbouras LBE, Built Environment Research Laboratory, University of Science and Technology, 16111 Algiers, Algeria

Keywords:

durability, mechanical properties, concrete, cement, sulphate attack

Abstract

Concrete in sulphates environments often undergoes significant alterations that often have significant adverse results on its engineering properties. However, the choice of cement type is a very important factor for concrete exposed in aggressive environment. This research presents the effect of two types of cement on the mechanical and microstructure properties of ordinary concretes exposed in aggressive solution dosed with 5% of gypsum (Ca2SO4.2H2O). The tests studied in this experimental part were the compressive strength, flexural strength, thermogravimetry, mercury intrusion porosimetry and mass variations of the concrete. The results clearly show that the CEM I 42.5 is suitable for the formulation of concretes exposed to sulphate attack and their properties are better compared with the CEM II/A 42.5.

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Published

2020-05-21