Abstract: This specification discloses method and apparatus for treating surface layers of the earth to obtain stabilization, build strength and permeability characteristics; characterized by slaking quicklime (CaO) in a mixing tank to form an elevated temperature, hydrated lime [Ca(OH).sub.2 ] slurry and working the resulting elevated temperature lime slurry into the surface of the earth at the local where the stabilization of the soil is to be achieved. This achieves a cost reduction, has greater reliability in obtaining materials, achieves better results, saves energy and extends the soil-stabilization season into cold weather previously considered prohibitive. Also disclosed are the details of preferred embodiments for admixing the unslaked lime.

Abstract: This specification discloses method and apparatus for treating subsurface layers of the earth to build strength of the subsurface layers and control movement of the subsurface water characterized by slaking quicklime (CaO) in a mixing tank to form an elevated temperature, hydrated lime [Ca (OH).sub.2 ] slurry and injecting the resulting elevated temperature lime slurry at a predetermined plurality of spaced apart locations and at predetermined depths into the earth subsurface layers. This achieves a cost reduction, has greater reliability in obtaining materials, achieves better results, saves energy and extends the injection-stabilization season into cold weather previously considered prohibitive. Also disclosed are the details of preferred embodiments for admixing the unslaked lime for the various uses.