ASTM D75/D75M:19 pdf free download – Standard Practice for Sampling Aggregates.
5.3.5.3 A metal template placed over the area will aid in securing approximately equal increment weights. Place the template on top of the material to be sampled. Sample material from the center of the template. As material is extracted from the center of the teniplate. the template is continuously lowered to prevent the material outside of the template from falling into the sample hole. The template shall bc composed of metal or other shirdy material, no less than 0.3 in 112 in.I in diameter and 0.25 m [9 in.] in height, providing a sampling area not less than 0.07 m2 [110 in.2] (see Fig. 5).
5.4.1 The number of field samples (obtained by one of the methods described in 5.3) required depends on the criticality of, and variation in, the properties o he measured. Designate each unit from which a field sample is to be obtained prior to sampling. The number of field samples from the production shall he suflicieni to give the desired confidence in teSt results.
Note I l—Gtikkince for detennimng the number of samples required to obtain the desired level of confidence in test results may be found in Practices D22341D2234M, E105. E122. and E141.
5.4.2 The field sample masses cited are tentative. The masses must be predicated on the type and number of tests to which the material is to he subjected and sufficient material obtained to provide for the proper execution of these tests. Standard acceptance and control tests are covered by ASTM standards and specify the portion of the held sample required for each specific test. Generally speaking. the amounts specified in Table 1 will provide adequate material for routine grading and quality analysis. Extract test portions from the field sample according to Practice C7021C702M or as required by other applicable test methods.
6. Shipping Saniples
6. 1 Transport aggregates in bags or other containers so constructed as to preclude loss or contamination of any part of the sample, or damage to the contents from mishandling during shipment.
6.2 Shipping containers for aggregate samples shall have suitable individual identification attached and enclosed SO that field reporting, laboratory logging, and test reporting may he facilitated.5.3.5.3 A metal template placed over the area will aid in securing approximately equal increment weights. Place the template on top of the material to be sampled. Sample material from the center of the template. As material is extracted from the center of the teniplate. the template is continuously lowered to prevent the material outside of the template from falling into the sample hole. The template shall bc composed of metal or other shirdy material, no less than 0.3 in 112 in.I in diameter and 0.25 m [9 in.] in height, providing a sampling area not less than 0.07 m2 [110 in.2] (see Fig. 5).