AASHTO T99-10 pdf free download

AASHTO T99-10 pdf free download.Moisture-Density Relations of Soils Using a 2.5-kg (5.5-1b) Rammer and a 305-mm (12-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 E 29.
1.7. The values stated in SI units are to be regarded as the standard.
2. REFERENCED DOCUMENTS
2.1. AAS!!T() Standards:
• NI 92. Vire-Cloth Sieves for Testing Iurposes
• M 231, Weighing Devices Used in the Testing of Materials
• T 19M1 19, Bulk Density (“Unit Weight”) and Voids in Aggregate
• T 224, Correction for Coarse Particles in the Soil Compaction Test
• T 265, Laboratory Determination of Moisture Content of Soils
2.2. ASTM Standards:
• D 2168. Standard Practices for Calibration of Laboratory Mechanical-Rammer Soil
Compactors
• E 29, Standard Practice for Using Significant Digits in Test Data to Determine Conformance
with Specifications
3. APPARATUS
3.1. Molds—The molds shall be solid-wall, metal cylinders manufactured with dimensions and capacities shown in Sections 3.1 .1, 3.1.2, and Figures 1 and 2. They shall have a detachable collar assembly 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 assembly 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 0.005 in. as shown in Figures 1 and 2.
Note 2—Alternate types of molds with capacities 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. A 101.6-mm (4-in.) mold having a capacity of 0.000943 ± 0.000008 m3 (/3o (0.0333)± 0.0003 ft3) with an internal diameter of’ 101.60 ± 0.41 mm (4.000 ± 0.016 in.) and a height of 116.43 ± 0.13 mm (4.584*0.005 in.) (Figure I).
3.1.2. A 152.4-mm (6-in.) mold having a capacity of0.002l24 ± 0.000021 m’ (/333 (0.07500) ±
0.00075 ft3) with an internal diameter of’ 152.40 ± 0.66 mm (6.000 ± 0.026 in.) and a height of
116.43 ± 0.13 mm (4.584 ± 0.005 in.) (Figure 2).
3.1.3. Molds Out of Tokrance Due to Use—A mold that fails to meet manufacturing tolerances after continued service may remain in use provided those tolerances are not exceeded by more than 50 percent: and the volume of the mold, calibrated in accordance with T l9M/T 19 for Unit Mass of’ Aggregate, is used in the calculations.
3.2.1. Manually Operated- -Metal rammer with a mass of 2.495土0.009 kg (5.5土0.02 Ib), and having a flat circular face of 50.80-mm (2.000-in.) diameter with a manufacturing tolerance of士0.25 mm (0.01 in.). The in-service diameter of the flat 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 of 305土2 mm (12.00土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 (/g-in.) diameter spaced approximately 90 degrees (1.57 rad) apart and approximately 19 mm (/4 in.) from each end; and shall provide sufficient clearance so the free fall of the rammer shaft and head is unrestricted.AASHTO T99-10  pdf download.