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Significant dislocations of grains always occur when granular materials are sampled by conventional methods. Relative motion of soil grains during the sampling process can be minimized or prevented by replacing the void fluid by a solid prior to sampling. Chemical grouts can be used for this purpose.
Equipment and techniques for placing the grout have been developed and tested in the field. Strata as fine as 1/16 in. thick, normally lost by conventional sampling, can be delineated by chemical grouting prior to sampling.
Limited data indicate a linear relationship between relative density and unconfined compressive strength of stabilized granular soils. Laboratory testing of fabricated stabilized samples at zero and maximum density defines the relationship. Testing of stabilized field samples then indicates relative density.
chemical grouts, disturbance, grout properties, relative density, sampling, noncohesive soils, soil mechanics, compressive strength, undisturbed sampling, evaluation, tests
Director, Continuing Engineering Studies, Rutgers University, New Brunswick, N. J.