Achieving an appropriate durability for concrete demands, among other dosing requirements, the use of concrete with a minimum cement amount. However, no accurate method exists to calculate the among of cement in hardened concrete. This article reports on research undertaken to develop a method able to determine the quantity of cement through the application of selective colorings on concrete cylinders. The authors carried out chemical tests that give rise to colored compounds through a selective reaction with certain mineral species present in cement paste. In the case of carbonated concretes (pH approximately equal to 9), the reaction with potassium ferrocyanate dyes the cement paste a strong blue color that disappears when the concrete is treated again with a slightly more alkaline solution. Both in carbonated concretes and in young concretes with an alkaline reserve, the tannic acid dyes the cement paste dark brown.

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    The Boulevard, Langford Lane
    Kidlington, Oxford  United Kingdom  OX5 1GB
  • Authors:
    • Chinchon, S
    • Garcia, J
    • Lopez-Atalaya, M
    • Linares, A
    • Vera, R
  • Publication Date: 2004-11


  • English

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  • Accession Number: 00986430
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 8 2005 12:00AM