Downloaded from https://www.everyspec.com ‘H7D420A 13 &eWry 1-s Method 106 1)ETERIWNA1’1ONOF WATER CONTENT BITUMINOUS MIXTURES USING A NONFLAMMABLE SOLVENT 1. SCOPE 3.1 The sample of bituminous mix shall be representative of the matirid to ~ tested and of such size practically to till the container in which it is transported to the laboratory. For duplicate teati, a sam- ple filling a ~~-gallon, friction-top, tin pail is satisfactory. 1.1 The proposed procedure is intended for the determination, by direct measure- men~ of the water content of hot-mix bituminous mixtures.’ 2 APPARATUS S.2 Break up the sample and mix throughly.
Weigh out an amount estimated to contain a percentage of moisture that is within the capacity of the trap calibmtion. Keep the remainder of the sample in a tightly covered container. (Preferably the sample should weigh not less than 600 g for normal mixtures, ) Place the sample in the still and ndd the solvent as prescribed in 4,1, 2.1 Metal still of the vertical, cylindrical type, similar to that used in ASTM D 244, having a faced flanged at the top, to which the head is tightly attached by means of a clamp. The head shall be of metal, pre- ferably copper or brass, and shall be pro- vided with n tabulation 1 in.
in inside diameter, 2.2 Condenser of the water-cooled, retlux, L glass-tube type, having a condenser jacket not less than 400 mm (153/4 in. ) long, with an inner tube 9.5 to 12.7 mm (s/8 to ~~~in.) in outside diameter. The end of the con- denser that is inserted in the trap shall be ground off at an angle of !)0 degrees from rhe vertical axis of the condenser. 34 Use only one of the following solvents. 3.S.1 1,1,2 trichlorethane (active ingredi- ent 100 percent), known akw as vinyl tn- chloride (CICH, CHCL). * 3.S.2 1,1,1 trichloroethane (methyl chloro- form) (CH, CC1,). 23 Trap, of vvell-anneakd glass, con- forming b the dimensions shown in figure 1 of ASTM D 322. 4.
TEST PROCEDURE 4.1 Place the prepared sample in the still, add 260 ml of the solvent, and quickly stir into the sample. Attach the still cover fixmdy, and assemble the trap and conden- ser in the manner prescribed in ASTM D 96. (Fill the trap with solvent prior to aaaem- bly of apparatus.) 24 Heating device. Any satisfactory source of heat capable of maintaining a rate of distillation of 2 to 3 drops per sec. 3 SAMPLE ~tist is to be conducted as m put of this promdure in order to detern~lne a correction factor, applicdJon of which is given in pmragrsph 5.2. Method 106 S9