HYDROPHOBIC EARTH AS A MEANS OF MOISTURE -, THERMAL -, AND ELECTRIC - INSULATION

SOME PROBLEMS ARE DESCRIBED OF THE THEORY AND PRACTICE OF SOIL HYDROPHOBIZATION AND METHODS ARE DESCRIBED OF OBTAINING AND APPLYING FRIABLE HYDROPHOBIC MATERIALS. THE FUNDAMENTAL PRINCIPLE OF THESE METHODS CONSISTS IN COVERING THE HYDROPHILIC SURFACE WITH HYDROPHOBIC MATERIAL. THE INTRODUCTION OF THE HYDROPHOBIC REAGENT INTO THE SOIL IS FOLLOWED BY THE PHASE INTERACTION BETWEEN THE HYDROPHOBIZER AND THE TREATED MATERIAL. ACCORDING TO THE MANNER IN WHICH THE REAGENT IS ABSORBED BY THE TREATED MATERIAL, IT IS POSSIBLE TO DISTINGUISH THE FOLLOWING TYPES OF THE GROUND-SOIL ABSORPTION POWER: (1) MECHANICAL ABSORPTION POWER, (2) BIOLOGICAL ABSORPTION POWER, (3) CHEMICAL ADSORPTION POWER, (4) CHEMICAL ADSORPTION, (5) PHYSICAL ADSORPTION, AND (6) PHYSICOCHEMICAL OR INTERCHANGE ADSORPTION. THE PROCESSES OF HYDROPHOBIZING SOILS BY MEANS OF DIFFERENT REAGENTS ARE REVIEWED. THE GENERAL REQUIREMENTS TO BE FULFILLED BY THE HYDROPHOBIZING REAGENTS ARE: (1) ABSENSE OF WETTABILITY AND SOLUBILITY IN WATER, (2) CONSIDERABLE ADHESION TO THE MINERAL SURFACE, AND (3) EASY AND UNIFORM DISTRIBUTION IN SOIL MASS. THE FUNDAMENTAL PROCESS OF HYDROPHOBIZATION IS CONSIDERED AS AN ADHESION PROCESS WITH THE BUILDING UP OF AN INDEPENDENT PHASE ON THE SURFACE OF THE MINERALS. FOR THE PURPOSE OF HYDROPHOBIZATION ANY SUBSTANCES MAY BE USED WITH A SUFFICIENT DEGREE OF ADHESION TO THE MINERAL, WHICH ARE NEITHER WETTED BY WATER NOR SOLUBLE IN THE LATTER. THE MAIN REQUIREMENTS FOR THE HYDROPHOBIZATION ARE: (1) THE UNIFORM DISTRIBUTION OF REAGENT ON THE MINERAL SURFACE, (2) THE BUILDING OF A VOLUME FILM RESISTING THE HYDROSTATIC PRESSURES, AND (3) THE ELIMINATION OF HYDRATE FILMS FROM THE MINERAL SURFACE AND FROM THE HYDROPHOBIC COVERING. THE POSSIBILITY IS SHOWN OF USING THE HYDROPHOBIC EARTH AS A COMBINED THERMO-HYDRO-ELECTRIC INSULATOR AS WELL AS A SEPARATE THERMO-AND HYDRO-INSULATING MATERIAL.

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  • Accession Number: 00235721
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 17 1970 12:00AM