ASTM D3668-78(1985) pdf free download.Standard Test Method for Bearing Ratio of Laboratory Compacted Soil-Lime Mixtures.
ASTM D3668-78(1985) covers the determination of the bearing ratio of soil-lime mixtures when compacted and tested in the laboratory by comparing the penetration load of the soil-lime mixture to that of a standard material.
5. Preparation of Test Specimen
5.1 If the specimen is to be soaked, take a representative sample of the material, for the determination of moisture in accordance with Test Method [)2216, at the beginning of compaction and another sample of the remaining material after compaction. If the test specimen is not to he soaked, take a representative sample of material from one of the cut faces after penetration, as described in 6.4 to determine the moisture content.
5.3 Remove the extension collar and carefully trim the compacted soil-lime mixture even with the top of the mold by means of a straightedge. Patch with smaller size material any holes that may have developed in the surface by the removal of coarse material. Remove the peribrated base plate and spacer disk, weigh, and record the weight of the mold and compacted soil-lime mixture. The curing desired for the soil-lime specimen shall be done at this time. Conduct all curing in suitable sealed containers to prevent carbonation of the lime.
6. Procedure
6.1 Place a sullic lent number of surcharge weights on the specimen to produce a surcharge equal to the weight of the base material and pavement within 5 lb (2.27 kg) but not less than 10 lb (4.54 kg). If the specimen has been soaked previously, the surcharge shall be equal to that used during the soaking period. To prevent upheaval of soil-lime mixture into the hole of the surcharge weights, place the 5-lb (2.27-kg) annular surcharge weight on the soil-lime surface prior to seating the penetration piston, after which, place the remainder of the surcharge weights.