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Stir the emulsion in the viscometer at 60 revolutions per minute Scope with the thermometer until the test temperature is attained, Adjust the bath temperature until to measure the consistency of an asphalt emulsion. It is the emulsion temperature remains constant for 1 min at 50 6 applicable to all the emulsions specified in Specifications 0. Withdraw the thermometer.
Quickly remove the excess D and D Determine the viscosity as described in Test Method D Report the results Significance and Use to the nearest full second. When products and lubricants when the time of flow is less than 25 s, this used in application types of construction, the material must be instrument is satisfactory for testing emulsified asphalt when the time of thin enough to be uniformly applied through the spray bar of flow is not less than 20 s.
Precision and Bias crown or grade of the road. For mixing grade emulsions, the viscosity may affect mixibility and resulting thickness of film Therefore, strict adherence to test procedure is Procedure Scope Place of asphalt emulsions suitable for mixing with coarse graded the bottle in the water bath at 25C for 30 min and mix the calcareous aggregates.
It can be applied to other aggregates. Pour the sample into the viscom- eter through the m sieve or mesh strainer, allowing a Significance and Use small portion to flow through the outlet tube to waste. Place the cork in position, fill the viscometer and, without again stirring Heat the emulsion sample to 6 5F 50 6 3C completion of the mixing. Stir the sample thoroughly without incorporating bubbles, and then pour ap- Apparatus proximately mL into a mL glass beaker.
Immerse the Hold the beaker upright and stir the emulsion with a wide steel blade with rounded corners. A Avoid Heat the emulsion in the water bath forming to Specification E Immediately pour the All joints and fitting attachments shall be soldered and shall be watertight.
All couplings shall be standard brass garden hose fittings. The mm pipe valve shall be placed as close as possible to the bottom of the tank, allowing space to shut off the valve. The tank shall be placed on a suitable stand, so that the distance from the bottom of the spray head to the top of the test sample is 0.
The water shall issue from the Sample Materials emulsion to be tested. Procedure for Tests with Dry Aggregate laboratory-washed and air-dried limestone aggregate graded to pass the Laboratory Limestone from the Monon Stone Co. NOTE 6The total weight of aggregate and dust shall equal g.
NOTE 2Existing NOTE Carefully drain off the water in the g. Scoop the mixture from the mixing pan on to absorbent At the end of the A fan may be used for drying if desired. Procedure for Tests with Wet Aggregate The distance from the sprayhead to the mixture into the mixing pan and mix thoroughly to obtain sample shall be 6 75 mm.
Then carefully pour off the uniform wetting. Continue spraying and pouring off the water until the Interpretation of Results a rating of poor applies to the condition of an excess of uncoated area over coated area. Penetration Significance and Use ing amount: Specific Gravity should not be considered suspect unless they differ by more Ductility Ash Content Float Test D Solubility in Trichloroethylene revise 6.
If the residue has been allowed to cool below C, Method D Washing the sand to remove impurities setting cationic emulsified asphalts. Their inability to coat a prior to test is required. Significance and Use Apparatus The test beaker or bowl, mL capacity. Decant water without mm or larger. Repeat water washing the sand two more times. Place pan with sand in an oven and dry the sand Table 1 of Specification E 1. Mix sand for approximately 30 s to obtain unifor- Materials Add 35 g of the emulsion to be tested and mix At the end of the mixing period, tilt the beaker and allow any excess emulsion, Millimetres 0.
Visually Emulsified Asphalt Emulsion Sample estimate the amount of uncoated and coated area in the See Note 7. Interpretation of Results Sand Preparation An excess of blend of 80 mL distilled water and mL isopropyl alcohol in uncoated area over the coated area shall be considered as a a mL graduated cylinder.
If results are inconclusive, the washing and stir for 5 min with a stainless steel spatula or a glass rod. Summary of Practice Apparatus and Material The use of hand mixed with a weighed amount of emulsified asphalt.
Mixing time should extend until aggregate is completely a Bunsen burner will necessitate the placement of an interfacial coated. The amount of CSS-grade emulsified asphalt in the mix material between the flame and beaker. The The ration with the edges folded downward, or cut a strip of m retained coating, after boiling, is determined. Bend the strip Significance and Use into a circle and insert it in the bottom of the beaker. Place the CSS-D to properly mix, coat, and adhere to a specified silica sand aggregate.
Allow to air cure for 24 impurities prior to test. Remove sample from paper napkin and break into several If sample blade of approximately mm in length. Place the coated Report Water may be added to facilitate mixing; 1. Summary of Practice into the porcelain saucepan.
The ability of the emulsion to remain as a coating during a 5-min mixing cycle is observed. The resistance offered by the Significance and Use applies to the condition of an excess of coated area over
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