Void surface water

Dampproofed concrete, therefore, should not show significant uptake of surface water in conditions of rain and wind up to about 100 km h T In fact, on prolonged exposure, some wetting does occur, because of defects in the hydrophobic coating, and the presence of larger voids in the concrete, up to perhaps 1 mm wide these are due to incomplete compaction, or to the nature of the concrete in the case of blocks. 

For the T300/Narmco 5208 system, the water concentrations within the bulk resin and at the void surface were obtained from measured solubility, weight fraction, and density data. The water concentration in the bulk resin is dependent only on the initial relative humidity under which the resin was equilibrated and is given by ... 

The water concentration at the void surface is a function of both the temperature and partial pressure of water within the void as follows ... 

Most soils have some amount of water in the soil voids. The water may be gravitational, capillary, or hygroscopic. The basis for distinction is the force that influences the water behavior. Stabilization methods are concerned mainly with gravitational water, generally present beneath the soil surface in areas requiring stabilization. The topography of the surface below which water is continuous is called the water table or the phreatic line. 

Groundwater — Water present below the soil surface and occupying voids in the porous subsoil, specifically the porous layer that is completely saturated with water. The upper surface of the groundwater is referred to as the water table. Contamination of groundwater is a major concern when oil is spilled on land as groundwater supplies springs and wells and passes into surface water in many areas. 

As shown by the IR data included in this study, the onset of adsorbed surface water loss occurs at 100°C, the same temperature at which the relative red shift in emission begins. Among a choice of explanations given, the authors hypothesized that the pores within the matrix at this point become void of solution, temporarily allowing greater rotational movement of [Ru(bpy)3] +. As the pores collapse around the molecule, [Ru(bpy)3] + molecules are again restricted in their motion by the matrix acting as the solvent. 

Hydrocompaction may occur on alluvial cones. The dried surface layer of these cones may contain many voids. Percolating water frequently reduces the strength of the material that, in turn, reduces the void space. This gives rise to settlement or hydrocompaction. 

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