AASHTO T 180-21 Standard Method of Test for Moisture–Density Relations of Soils Using a 4.54-kg （10-lb） Rammer and a 457-mm （18-in.） Drop.pdf

Standard Method of Test for Moisture-Density Relations of Soils Using a 4.54-kg (10-lb)Rammer and a 457-mm (18-in.)Drop AASHTO Designation:T 180-21 Technically Revised:2021 Technical Submittee:1b Geotechnical Exploration Instrumentation Stabilization and Field Testing AASHIO American Association of State Highway and Transportation Officials 555 12th Street NW Suite 1000 Washington D.C.20004 Standard Method of Test for Moisture-Density Relations of Soils Using a 4.54-kg (10-lb)Rammer and a 457-mm (18-in.)Drop AASHTO Designation:T 180-21 AASHIO Technically Revised:2021 Technical Submittee:1b Geotechnical Exploration Instrumentation Stabilization and Field Testing 1. SCOPE 1.1. This method of test is intended for determining the relationship between the moisture content and density of soils when pacted in a given mold of a given size with a 4.54-kg (10-1b)rammer dropped from a height of 457 mm (18 in.).Four alternate procedures are provided as follows: ■Method A-A101.60-mm(4-in.)mold:Soil material passing a4.75-mm(No.4)sieve(see Sections 4 and 5); ■Method B-A152.40-mm(6-in.)mold:Soil material passing a4.75-mm(No.4)sieve(see Sections 6 and 7); ■Method C-A101.60-mm(4-in.)mold:Soil material passing a19.0-mm(0.75-in.)sieve(see Sections 8 and 9);or ■ Method D-A 152.40-mm (6-in.)mold:Soil material passing a 19.0-mm (0.75-in.)sieve(see Sections 10 and 11). 1.2. The method to be used should be indicated in the specifications for the material being tested.If no method is specified the provisions of Method A shall govern. 1.3. This test method applies to soil mixtures that have 40 percent or less retained on the 4.75-mm (No.4)sieve when Method A or B is used and 30 percent or less retained on the 19.0-mm (0.75-in.)sieve when Method C or D is used.Material retained on these sieves shall be defined as oversize particles (coarse particles). 1.4. If the test specimen contains oversized particles dry density and moisture corrections must be made in accordance with Annex A1...