product manual H-1449 H-1449_man_10.
1. Scope This is to determine bitumen content of hot paving mixtures by use of the vacuum extractor. The aggregate remaining after extraction of the bitumen may be used for sieve analysis. This test is designed for field control work on freshly mixed hot paving mixtures, but may be adapted for other uses. 2. Apparatus Vacuum extractor complete with vacuum pump, gasket, rubber tubing, filter paper, support plate and funnel ring, similar to that shown in Fig 1.
of less than that, then pour 200 ml of alcohol on to the specimen. Add approximately 700 ml of methylene chloride, stir occasionally for approximately five minutes or until all asphalt is visually in solution. TABLE 1: SIZE OF TEST SPECIMEN NOMINAL MAXIMUM SIEVE SIZE APPROXIMATE MINIMUM WEIGHT OF SPECIMEN (GM) No. 4 500 3/8" 1000 ½" 1500 ¾" 2000 1" 3000 1½" 4000 4. Method A PROCEDURE 4.1 Place a dry tare filter on the vacuum extractor and tighten the wing nuts finger tight.
CALCULATIONS Calculate the percentage of bitumen extracted as follows: Bitumen extracted, percent of gross test specimen weight Where: S= Weight of test specimen A= Weight of extracted mineral aggregate Add the retention factor (note 2), previously determined for the job mix, to the percent bitumen extracted and report total as percentage of bitumen in the mix (note 3). Note 2: see section 8 for procedure for determining the retention factor. Note 3: procedure as detailed in section 4.
.4 Mix the bitumen and aggregate by hand until aggregate is thoroughly coated. The mix specimen shall be kept within the specified job- mix temperature range by placing it on the hot plate during mixing. The mixing tool shall remain in the beaker until the specimen is ready to be transferred to the extractor. 5.5 Allow the specimen to cool to less than 130°F. Then add alcohol and methylene chloride and stir as in section 3. 5.
H-1449.5 H-1449.1 H-1497.613, 1 PKG. H-1448SP H-1448.1 H-1449.4 H-1449.2 H-1449.6 H-1448RT 3 FEET, (REF.) H-1449.
H-1448 and H-1449 Extractor Replacement Parts Description Fluorosilicone o-ring Model H-1448.1 Gauge, H-1448 H-1448G Glass Tubing, includes 2 o-rings H-1448GT Free-flow vacuum plate H-1448GS Stainless Steel Plate, as provided H-1448P Stainless Steel Plate, Heavy-Duty H-1448HP Rubber Tubing H-1448RT Clear, Heavy-wall, Vacuum Tubing 4,000cc Erlenmeyer Flask, meets ASTM D2172 and AASHTO T164 (Method E) 8" Sieve adapter H-1446 H-4913.
Warranty Humboldt Mfg. Co. warrants its products to be free from defects in material or workmanship. The exclusive remedy for this warranty is Humboldt Mfg. Co., factory replacement of any part or parts of such product, for the warranty of this product please refer to Humboldt Mfg. Co. catalog on Terms and Conditions of Sale. The purchaser is responsible for the transportation charges. Humboldt Mfg. Co.
