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  1. BabbageGeo

    Stainless steel 304 corrosion resistance to soils and groundwater?

    Sulphate reducing bacteria will pit SS fairly rapidly. Volcanic soils can also be a problem. Elec conductivity and the presence or potential for stray current from earthing systems should be evaluated.
  2. BabbageGeo

    Ducts, cables : influence of soil thermal characteristics

    You may find the following of some use: Thermal Resistivity of Soil 1- Silica at 27 ºC k = 1.3 W/m.ºC, then the Resistivity = 0.77 ºC.m/W [ 3-263 Perry’s Chemical Engineering Handbook] 2- Soil at 27 ºC k = 0.52 W/m.ºC, then the Resistivity = 1.92 ºC.m/W [ 3-263 Perry’s...
  3. BabbageGeo

    Heavily Loaded Pipe-Arch Culverts

    Barry, I suggest that you check out the support conditions for the pipe arches and the potential for movement of the fill between and supporting the arches. I suspect for the heavily loaded situation you are looking at minor variations in field performance and control of the backfill and the...
  4. BabbageGeo

    Why 95% Compaction

    There is another issue here that does not appear to have been considered; that is the moisture content of the soil at the time of compaction and its relationship to the M/C at max dry density for either std or modified Proctor Compaction. For low moisture content soils, particularly those dry...

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