Downloaded from https://www.everyspec.com ~20A 13 J9mmry?Ms Method 105 DETERM1.NATION OF BULK-IMPREGNATED SPECIFIC GRAVITY OF AGGREGATE PROPOSED FOR USE IN BITUMINOUS PAVING MIXES --- 1. SCOPE 26 St!rrcr, (W henvy shwt-metal strip ~bout 1 in. wide for stirring content of each pail, 1.1 This test method is for determination of the spific gravity of the coarse, fine, and blended aggregates (including filler) proposed for use in hot-mix bituminous pav - ing mixes. It is to be used only when the ~!-ater absorption for the entire blend of aggregates aekcted for the job-mix formula exceeds 21/2 percent.
The method is not applicable for determination of specific gravity of mineral filler except when min- eral filler is included in the blended aggre- gate. Specific gravity of mineral filler alone shall be determined in accordance with .4STM D 854 or C 188, whichever is ~ppli- 26 Appurtenant equipme~t. A container fcr immersing the l-gal pail, and an aasem- bly for suspending the pail from the brdance. 3. SAMPLE 9.1 Sufficient quantities of materials shall be obtained at time of sampling to meet the specification wquiremcnts of SS-R406, and to provide fol’ the tests described here- in. S8mples shrill consist of the following. cabie for the type material to be examined. 3.1.1 .4gurcoute.
Aggregate samples shall consist of 1000 g of fine aggregate, 1500 g co~rse aggregate, or 1500 g of blended aggregate, taken with care to insure that the aggregate to be tested represents pro- (otype grading. 2 APPARATUS 21 Oven. A large, thermostatically cml- trolled oven, sensitive to A F,, capable of maintaining ternperatuves in the approx- imate range of 275” to 325° F. 3.1.2 Asphalt cement. .4sphalt cement of 85 to 100 penetration grade. 22 Balance. A balance of approximately 5000-g capacity, sensitive to 0.1 g, arranged for weighing sample in nir and suspended in water.
A TEST PROCEDURE 23 Pails Pails of l-gal capacity (syl*up can with top rim removed to eliminate en- trapped air is satisfactory) equipped with wire handle for suspending in water. 4.1 Dry the aggregate sample to a con- stant weight at a temperature not less than 230” F. nor greater than 290° F., and weigh to nearest 0,1 g. 4.2 Heat the previously specified asphalt to 280° = 6° F., taking care that the tem- perat ure never exceeds 2850 F., and pour into the 1-gal pniI about one-third full. b for retaining approxim~tely 1000 g of ag- gregate. 2.4 Pans Metal pans of a size suitable IbMbod lW 86