Time Dependency of CaO-Treated Expansive Soils

T. López-Lara

Research Professor, Universidad Autónoma de Querétaro; Cerro de las Campanas SN, Santiago de Querétaro, Querétaro; Mexico

V. M. Castaño

Researcher, Instituto de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México; Querétaro, Querétaro, Mexico


In some practical cases of CaO-stabilized soils, a reversibility phenomenon seems to appear. This implies that, after some time, a CaO-treated expansive clay soil recovers its initial expansive properties. In the present work, a method for soil aging is proposed and applied for observing the mineralogical composition behavior of the treated soil through time, from material addition. With this method, the existence of such reversibility could be confirmed or rejected. X-Ray Diffraction and another characterization technique were also used.

KEYWORDS: Lime-treated soils, treated soil, stabilized expansive soils, expansive soils, soil aging, soils stabilization.


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