Journal of Materials Science

, Volume 21, Issue 4, pp 1293–1296 | Cite as

Influence of slag substitution on some properties of sand-lime aerated concrete

  • S. A. S. El-Hemaly
  • A. S. Taha
  • H. El-Didamony


The effect of substitution of sand with granulated slag on some properties of sand-lime aerated concrete was investigated. The compressive strength, the hydration kinetics and the nature of the hydration products were studied for samples autoclaved under 8 atm for different periods from 0.5 to 24 h. The results indicate that the substitution of slag leads to a marked increase of the compressive strength compared with that of the unsubstituted samples. The extent of hydration, as measured by the chemically combined water, free lime and free silica contents, is enhanced due to the slag substitution. The X-ray diffraction results show that the hydration products are mainly tobermorite-like phases, C4AH13,C3AH6 and CAH10 in the slag-containing samples. Cement notations are used in the text, e.g. C=CaO, S=SiO2, A=Al2O3 and H=H2O.


Polymer SiO2 Hydration Al2O3 Compressive Strength 
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Copyright information

© Chapman and Hall Ltd. 1986

Authors and Affiliations

  • S. A. S. El-Hemaly
    • 1
  • A. S. Taha
  • H. El-Didamony
  1. 1.National Research Centre and Zagazig UniversityCairoEgypt

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