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  2. Needle ice - Wikipedia

    en.wikipedia.org/wiki/Needle_ice

    Liquid water underground rises to the surface by capillary action, and then freezes and contributes to a growing needle-like ice column. The process usually occurs at night when the air temperature reaches its minimum. The ice needles are typically a few centimetres long. While growing, they may lift or push away small soil particles.

  3. Wegener–Bergeron–Findeisen process - Wikipedia

    en.wikipedia.org/wiki/Wegener–Bergeron...

    The Wegener–Bergeron–Findeisen process (after Alfred Wegener, Tor Bergeron and Walter Findeisen []), (or "cold-rain process") is a process of ice crystal growth that occurs in mixed phase clouds (containing a mixture of supercooled water and ice) in regions where the ambient vapor pressure falls between the saturation vapor pressure over water and the lower saturation vapor pressure over ice.

  4. Water softening - Wikipedia

    en.wikipedia.org/wiki/Water_softening

    An alternative water treatment is called water conditioning, in which minerals remain in the water, but are altered so they do not form scale. Although the United States has standards for measuring the minerals in water, it does not have standards for measuring scale forming ability of water. Instead, US researchers use the German DVGW-W512 ...

  5. Pressure grouting - Wikipedia

    en.wikipedia.org/wiki/Pressure_grouting

    Different grout may be needed for fine grained and coarse grained soils in the grouted area. The greatest use of pressure grouting is to improve geomaterials (soil and rock). The purpose of grouting can be either to strengthen a formation or to reduce water flow through it. It is also used to correct faults in concrete and masonry structures.

  6. Frost weathering - Wikipedia

    en.wikipedia.org/wiki/Frost_weathering

    The ice accumulations grow larger as they attract liquid water from the surrounding pores. The ice crystal growth weakens the rocks which, in time, break up. [ 3 ] It is caused by the expansion of ice when water freezes, putting considerable stress on the walls of containment.

  7. Frost flower - Wikipedia

    en.wikipedia.org/wiki/Frost_flower

    Types of frost flowers include needle ice, frost pillars, or frost columns, extruded from pores in the soil, and ice ribbons, rabbit frost, or rabbit ice, extruded from linear fissures in plant stems. [1] The term "ice flower" is also used as synonym for ice ribbons, but it may be used to describe the unrelated phenomenon of window frost as well.

  8. Sea ice growth processes - Wikipedia

    en.wikipedia.org/wiki/Sea_ice_growth_processes

    Sea ice is a complex composite composed primarily of pure ice in various states of crystallization, but including air bubbles and pockets of brine.Understanding its growth processes is important for climate modellers and remote sensing specialists, since the composition and microstructural properties of the ice affect how it reflects or absorbs sunlight.

  9. Grout curtain - Wikipedia

    en.wikipedia.org/wiki/Grout_curtain

    A grout curtain is a barrier that protects the foundation of a dam from seepage and can be made during initial construction or during repair. [1] Additionally, they can be used to strengthen foundations and contain spills.

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