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The Grouting Intensity Number (GIN) involves the energy expended, which is grouting pressure P, and the grout volume injected V. The product PV is called the Grouting Intensity Number or GIN. The volume may be unitized to the length of the grouting intervals as liters/m (or interchangeably as weight of cement injected in kg/m, since for moderately thick mixes the numerical values are similar within 5 to 10 percent). The pressure has been used traditionally as bar, resulting in P-V or GIN units being bar liter/m

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