Document jyGoDEEQV7bBXZ9YjJrpmdO2k

AMERICAS SOCIETY FOR TESTING MATERIALS 1515 SPRUCE STREET, PHILADELPHIA, PA A*S*TM* STANDARD METHOD OF TEST ....... , ....., pgR _ , ..i.-.v,-/.:. LOSS ON BEATING OF OIL AND ASPHALTIC COMPOUNDS* < .. ................. A.S*T*M* DESIGNATION; D 6 - SO ... _...... This method is issued under the fixed designation p 6, the final number indicates the year of original adoption an stand* ard or, in the ease of revision, the year of Last revision* Adopted, 1911; Revised, 19X6, 1920, 1927, 1930* 1* This test covers the determination of the loss In weight (exclusive of water) of oil and asphaltio compounds when heated as hereinafter prescribed* The material under examination shall, therefore, first be tested for water end if water la found to be present, it shall be removed by suitable methods of dehyOration before the material is subjected to the loss on heating test; or another sample shall be obtained which is free from water* .......... . APPARATUS , . .. ; , . -. 2# The oven shall be rectangular In form with double walls and heated by electricity* Its interior dimensions shall be m follows; height, exclusive of space occupied by the beating element, not less than 29*26 cm* (11.5 in*), width and depth, each, at least 5*06 era* (2 in.) greater than the diameter of the revolving shelf* The oven shall be provided with a perforated metal oi3> cular shelf approximately 24*8 era* (975 in*) in dlarater* A rec ommended form of aluminua shelf is shown in Fig* 1* This shelf shai: be placed in the center of the oven, with respect to all dimensions of the interior of the same, suspended by a vertical shaft and pro vided with mechanical means for rotating it at the rate of 5 to 6 revolutions per minute* ' one side of the oven shall be hinged and equipped to serve as a tight fitting door which shall contain a window at leadt 4 inch square, with double glass, through which a thermometer, located in front of and level with the revolving shelf, may be read without opening the door* * Under the standardization procedure of the society, this method is under the gurlddlotlon of the A*S*TM* Committee D-4 on Road and Paving material* DSW 330741 STLCOPCB4077385 One round Tent hole each shall either be placed in the top end bottom of the even or one only near the top end one only near the hotton on each side of the oven* Each hole shall be not less than 1.27 om, (0.5 in.) nor more than 1.60 cm. (0.63 in*} In diameter and they shall both be left open during the operation of the oven* . . . - s .. 5* The thermometer shall conform to the following re~ quir eraent s. The specifications oover a special thermometer * graduated in Centigrade degrees, the range being 155 to 170 c* (Requirements hot eopled as this thermomstsr does not cover the 200F# point)* . \. 4* The container In which the sample is to be tested shall be of metal or glass cylindrical in shape, and shall have a flat bottom* Its inside dimensions shall be substantially as followss' diameter, 35 mm* (2*17 lh)| depth, 35 n&* (l*3o in*}* $ote* The American Can company*0 3-02. Gill style flat-bottom seamless ointment box, deep patten, fulfills these requirements* PREPARATION 0? SAMPLE 3* The sample as received shall be thoroughly stirred and agitated, warming, If necessary, to insure a complete mixture before the portion for analysis is removed* PROCEDURE 6# Fifty grams of the water-free material to be tested shall be weighed into a tared container conforming to the requiremeats of Section 4* The oven shall be brought to a temperature of l63C* (35O0 F,), and the box containing the sample placed In one of the recesses of the revolving shelf* The oven shall then be closed And the shelf rotated 5 to 6 revolutions per minute during the entire test. The temperatue shall be maintained at 1630c* (3250F,) for 5 hours after the sample has been introduced and the ovc has again reached that temperature* The sample shall be removed * from the oven, cooled and weighed, and the loss due to volatilieatloi oaleulated* 7* During the 5 hour period the temperature shall not var: more than 1C* All tests showing a greater variation in temperature shall be rejected, j 6* Under ordinary circumstance# a number of samples bavin about the same degree of volatility may be tested at the same time* ^ Samples varying greatly in volatility should be tested separately* v where extreme accuracy is required not more than one materiel should be tested at one time end duplicate samples of it should ba plaoed sfarultaneously in the oven* Suoh duplicates shall oheok within the limits of accuracy given in Section 9* Results obtained on samples showing evidences of foaming during the test shall be rejected. DSW 330742 STLCOPCB4077386 >\ ! > accuracy 9* Up to 5 per cent loss in weight the results obtained may be considered as oorreot within 0,5. Above 5 per oent loss In weight the numerical limit of error Increases 0*01 for every 0*5 per cent Increase in lose by volatilization as follows) Volatilization Loss, per cent h5.0 ' 10.0 15.0 25*0 40.0 Numerical Oorreotion *0.50 *0.51 *0.52 *0.o0 *0.70 *0*90 *1*20 True volatilisation jkosa* per cent to 6*52 r.40 to 10.60 14*30 to 15.70 24*10 to 25*90 38.80 to 41,20 NOTE; 20r the determination of loss on heating at 200 7, on Aroolors 1248 and 12p0 the above procedure was modified in that temperature of oven was maintained at 200 7* Instead of 163 C. Copled/hp 4/20/55 0S\N 330743 STLCOPCB4077387