ISO 17892-2:2014 pdf free

ISO 17892-2:2014 pdf free.Geotechnical investigation and testing一Laboratory testing of soil
Either the sample may be extruded from the sample tube through a cylindrical cutter or a cylindrical cutter may be pushed into the sample. The sample tube or specimen cutter shall be pushed steadily at constant speed into the soil. The specimen shall be trimmed further to make the ends flat and perpendicular to the specimen axis, as necessary.
The trimmed specimen shall be weighed to the nearest 0,01 g or 0,1 % of the total mass,whichever is the greater (m).
For a rectangular prism specimen, the lengths of the specimen shall be measured in at least three positions in each dimension to the nearest 0,1 mm or 0,1 % of the dimension being measured,whichever is the greater.
For a cylindrical specimen, the diameter shall be measured in two perpendicular directions,at each end and near the middle, to the nearest 0,1 mm or 0,1 % of the dimension being measured,whichever is the greater. The length shall be measured along three lines spaced at about 120° around the circumference, to the nearest 0,1 mm or 0,1 % of the dimension being measured, whichever is the greater.
If the specimen is likely to deform on removal from the tube its volume should be determined by measuring the inside diameter and the length of the sample tube. If the tube is not full, allowance should be made for any missing sample. Each length shall be measured to the nearest 0,1 mm or 0,1 % of the dimension being measured, whichever is the greater. The mass of the specimen should then be determined by difference, by weighing the tube with the specimen and the clean tube after extrusion of the specimen.
The specimen shall be coated completely if the chosen fluid can penetrate into the specimen.For example, if coating with wax the specimen should be repeatedly dipped into molten wax, allowing each layer of wax to solidify before further dipping. To avoid shrinking and cracking of the wax, it should be only just molten when applied.
The specimen shall be placed in the cradle suspended from the supporting frame attached to the balance. The specimen shall be placed in the fluid taking care that no air bubbles are trapped underneath the specimen. Adjust the fluid level so that the specimen is completely submerged and so that the cradle is at about the same depth in the fluid as in 5.2.1.2.ISO 17892-2 pdf download.