The European Physical Journal Special Topics

, Volume 224, Issue 9, pp 1985–1994 | Cite as

Reactivity of NO2 and CO2 with hardened cement paste containing activated carbon

  • M. Horgnies
  • I. Dubois-Brugger
  • N.J. Krou
  • I. Batonneau-Gener
  • T. Belin
  • S. Mignard
Regular Article
  • 51 Downloads
Part of the following topical collections:
  1. Advances in Design and Modeling of Porous Materials

Abstract

The development of building materials to reduce the concentration of NO2 is growing interest in a world where the air quality in urban areas is affected by the car traffic. The main binder in concrete is the cement paste that is partly composed of calcium hydroxide. This alkaline hydrate composing the hardened cement paste shows a high BET surface area (close to 100 m2.g−1) and can absorb low-concentrations of NO2. However, the presence of CO2 in the atmosphere limits the de-polluting effect of reference cement paste, mainly due to carbonation of the alkaline hydrates (reaction leading to the formation of calcium carbonate). The results established in this paper demonstrate that the addition of activated carbon in the cement paste, because of its very high BET surface area (close to 800 m2.g−1) and its specific reactivity with NO2, can significantly improve and prolong the de-polluting effect in presence of CO2 and even after complete carbonation of the surface of the cement paste.

Keywords

Activate Carbon Calcium Carbonate European Physical Journal Special Topic Cement Paste Calcium Silicate Hydrate 

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Copyright information

© EDP Sciences and Springer 2015

Authors and Affiliations

  • M. Horgnies
    • 1
  • I. Dubois-Brugger
    • 1
  • N.J. Krou
    • 2
  • I. Batonneau-Gener
    • 2
  • T. Belin
    • 2
  • S. Mignard
    • 2
  1. 1.Lafarge Centre de RechercheSaint Quentin FallavierFrance
  2. 2.Université de Poitiers, Institut de Chimie des Milieux et Matériaux de Poitiers, UMR 7285 CNRSPoitiersFrance

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