Materiales de Construcción, Vol 56, No 283 (2006)

Superface energy of several construction materials


https://doi.org/10.3989/mc.2006.v56.i283.7

J. Rubio
Instituto de Cerámica y Vidrio (CSIC), Madrid (España), Spain

M.ª J. Sánchez
Instituto de Cerámica y Vidrio (CSIC), Madrid (España)., Spain

M.ª R. Elvira
Instituto de Cerámica y Vidrio (CSIC), Madrid (España)., Spain

F. Rubio
Instituto de Cerámica y Vidrio (CSIC), Madrid (España)., Spain

J. L. Otero
Instituto de Cerámica y Vidrio (CSIC), Madrid (España), Spain

Abstract


Inverse gas chromatography at infinite dilution was used to characterize the surface of different construction materials (marble, sandstone, granite and brick). Surface energy can be divided into two components: dispersive and polar or acid-base. The highest dispersive energy value was found for sandstone, while the values for the other three materials were all very similar. The lower dispersive energy variation exhibited by sandstone with temperature changes is an indication that substances interact equally well with its surface at any temperature. All the materials were found to be amphoteric, with both acid and alkaline components, although acidity was greater in granite and brick and sandstone and marble had higher alkalinity.

Keywords


construction materials; energy; surface; chromatography; characterization

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