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Development of inorganic polymer by alkali-activation of untreated kaolinitic clay: reaction stoichiometry, strength and dimensional stability

Esaifan M., Rahier H., Barhoum A., Khoury H., Hourani M. and Wastiels J.Development of inorganic polymer by alkali-activation of untreated kaolinitic clay: reaction stoichiometry, strength and dimensional stability,Constr. Build. Mater.,91: 251,259,2015.

doi: http://dx.doi.org/10.1016/j.conbuildmat.2015.04.034

An environmental friendly building material was developed by alkali-activation of untreated kaolinitic
clay using sodium hydroxide. The reaction was studied using differential scanning calorimetry. The
chemical structure of the produced inorganic polymer was deduced from infrared spectroscopy, X-ray
powder diffraction, thermogravimetric analysis, and scanning electron microscopy to be the tetrahydrate
phase of hydroxysodalite with a Na/Al ratio of 4/3. Its strength and stability were evaluated in terms of
compressive strength under dry and saturated conditions using different ratios of mixing water and
NaOH. The compressive strength of dry samples ranges between 45 and 50 MPa. The wet samples after
soaking in water show a strength between 20 and 25 MPa, and the wet samples after alternating cycles of
drying and wetting also show a strength of 20–25 MPa.

BibTeX

@article{,
    author  = "Esaifan, M.; Rahier, H.; Barhoum, A.; Khoury, H.; Hourani, M.; Wastiels, J.",
    title   = "Development of inorganic polymer by alkali-activation of untreated kaolinitic clay: reaction stoichiometry, strength and dimensional stability",
    journal = "Constr. Build. Mater.",
    year    = "2015",
    volume  = "91",
    number  = "",
    pages   = "251,259",
    month   = "",
    doi     = "http://dx.doi.org/10.1016/j.conbuildmat.2015.04.034",
    note    = "",
}