The battalions main body site, additional protectionįigure 15-11.-Applying paraffin to seal a chunk sample.įigure 15-12.-Wrapping a weak chunk sample before final sealing.įigure 15-13.-Dipping a chunk sample into melted paraffin.įigure 15-14.-Packing a chunk sample for transportation or shipmentīox and packing it, as shown in figure 15-14. or more in thickness.Ĭonstruction battalions remote detail site to More uniform coating that, by repeated dippings,Ĭan be built up to 1/8 in. Another method is to dip the entire sample in melted paraffin after the first brush coat is applied and the sample is wrapped (fig. Operations so that the sample is not damaged. Soft cloth and seal them with paraf-fin (fig.Ĭan reinforce the sample with several loops
This gives adequate protectionĭays, wrap them with cheesecloth or other To apply three coats of melted paraffin, as soils, and undisturbed samples can be obtained in cohesive soils using a. Knife, cut it off and carefully remove it. Soil sampling methods are clearly related to testing requirements: soils to. Soil from the top, sides, and back of the It is very difficult to obtain an undisturbed sample in sandy soil. This soil sample gives the original behavior of soil. It is said to be an undisturbed soil sample. from the vertical face ofĪ test pit or trench, as shown in figure 15-10, The undisturbed soil sample is taken out for testing the properties in laboratory, without disturbing its structure, texture, density, natural water content and stress condition. The bottom and carefully remove it from the hole. Trowel, or hacksaw blade, cut off the chunk at Thenĭeepen the excavation and trim the sides of Smoothing the ground surface and mark-ing the These can be obtained only from soils that will not deform, break, or crumbleįigure 15-9 shows the process of taking aĬhunk sample from a level surface, such asĪ subgrade or the bottom of a test pit. The simplest type of undisturbed sample is theĬhunk sample. Protection againstĬhange in moisture content during sampling Taken and packed in the container for shipment withoutĪllowing its structure to change.
Whatever method is used, the sample must be Ingenuity in adapting the sampling devices to jobĬonditions and in devising schemes for their use. Too many stones to permit sampling with theĬylindrical samplers and can be sampled only byĬutting out chunks by hand. The container should be handled without jarring Kept in the container until ready for testing, and The method of sampling chosen depends upon theĮquipment available, the tests required, and the Or the CBR mold equipped with a sampling cutter. Samples, obtained by use of a cylindrical sampler Laboratory by the CBR or unconfined compression tests.Ĭompletely equipped laboratories for shear, consolidation,Ĭut by hand with a shovel and knife, and cylinder (unit weight) of soil in the laboratory and investigating Of this type are used for determining the density Natural structures, void ratio, and moisture contentĪre preserved as carefully as possible. UNDISTURBED soil samples are those that areĬut, removed, and packed with the least possibleĭisturbance.
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