AASHTO T180-19 pdf free download

AASHTO T180-19 pdf free download.Moisture- -Density Relations of Soils Using a 4.54-kg (1 0-Ib) Rammer and a 457-mm (1 8-in.) Drop.
1.6. The following applies to all specified limits in this standard: For the purposes of determining conformance with these specifications, an observed value or a calculated value shall be rounded off “to the nearest unit” in the last right-hand place of figures used in expressing the limiting value, in accordance with ASTM E29.
1.7. The values stated in SI units are to be regarded as the standard.
2. REFERENCED DOCUMENTS
2.1. AASHTO Standards:
• M 231, Weighing Devices Used in the Testing of Materials
• R 76, Reducing Samples of Aggregate to Testing Size
• T I9MiT 19, Bulk Density runit Weight”) and Voids in Aggregate
• T 85, Specific Gravity and Absorption of Coarse Aggregate
• T 217, Determination of Moisture in Soils by Means of Calcium Carbidc Gas Pressure
Moisture Tester
• T 255, Total Evaporable Moisture Content of Aggregate by Drying
• T 265, Laboratory Determination of Moisture Content of Soils
• T 310, In-Place Density and Moisture C’ontent of Soil and Soil- Aggregate by Nuclear
Methods (Shallow Depth)
2.2. ASTM Standards:
• D2 168, Standard Practices for Calibration of Laboratory Mechanical-Rammer Soil
Compactors
• El I, Standard Specification for Woven Wire Test Sieve Cloth and Test Sieves
• E29, Standard Practice for Using Significant Digits in Test Data to Determine Conformance
with Specifications
3. APPARATUS
3.1. Mold Assembh’ (Mold. Collar, and Basepltae.— Molds shall be solid-wall, metal cylinders manufactured with dimensions and capacities shown in Sections 3.1 .1 and 3.1.2 and in Figures 1 and 2 below. They shall have a detachable collar approximately 60 mm (2.375 in.) in height, to permit preparation of compacted specimens of soil-water mixtures of the desired height and volume. The mold and collar shall be so constructed that it can be fastened firmly to a detachable base plate made of the same material (Note 2). The base plate shall be plane to 0.13 mm (0.005 in.) as shown in Figures 1 and 2.
Note 2 Altemate types of mold assemblies with volumes as stipulated herein may be used. provided the test results are correlated with those of the solid-wall mold on several soil types and the same moisture—density results are obtained. Records of such correlation shall be maintained and readily available for inspection when alternate types of molds are used.
3.1.1. Molds having a volume of 0.000943 ± 0.000014 m3 (0.0333 ± 0.0005 fi3) shall have an inside diameter of 101.60 ± 0.40mm (4.000 ± 0.016 in.) and a height of 116.40 ± 0.50 mm (4.584 ± 0.018 in.) (Figure 1). I)ctcrmine mold volume in accordance with the “Calibration of Measure” section of T 19M/T 19 for Unit Mass of Aggregate.
3.1.2. Molds having a volume of 0.002124 ± 0.000025 m’ (0.0750 ± 0.0009 tI) shall have an inside diameter of 152.40 ± 0.70 mm (6.000 ± 0.026 in.) and a height of 116.40 ± 0.50 mm (4.584 ± 0.018 in.) (Figure 2). Determine mold volume in accordance with the “Calibration of Measure” section of T 19MFT 19 for Unit Mass of Aggregate.
3.2. Rammer:
3.2.1. Mamiallv Operated—Metal rammer with a mass of 4.536 ± 0.009 kg (10.00 ± 0.02 Ib) (Note 3)
and having a flat circular face of 50.80 mm (2.000 in.) diameter with a manufacturing tolerance of ±0.25 mm (±0.01 in.). The in-service diameter of the fiat circular face shall be not less than
50.42 mm (1.985 in.). The rammer shall be equipped with a suitable guide sleeve to control the height of drop to a free fall 457 ± 2 mm (18.00 ± 0.06 in.) above the elevation of the soil. The
guide sleeve shall have at least four vent holes, no smaller than 9.5-mm (0.375-in.) diameter, spaced approximately 90 degrees (1.57 rad) apart from each end, and shall provide sufficient clearance so the free fall of the rammer shaft and head is unrestricted.AASHTO T180-19 pdf download.