106.3.2.94 TM-94 Identification of Penetrating Emulsified Asphalts

106.3.94.1 Scope

This test method, applicable to both anionic and cationic emulsified asphalts, can be used as an identification test of the emulsions ability to penetrate a compacted asphalt mixture or a granular aggregate material.

106.3.94.2 Referenced Documents

ASTM Standards:

E 1 Specification for Liquid-in-Glass Thermometers

E 11 Specification for Wire Cloth and Sieves for Testing Purposes

AASHTO Standards:

T59 Standard Method of Test for Emulsified Asphalts

106.3.94.3 Significance and Use

This test method is used to identify or classify an emulsified asphalt as having a penetrating capability as measured by the amount of emulsified asphalt that can pass through a 500 wire sieve in a period of 5 minutes.

106.3.94.4 Sample Conditioning for Testing

All emulsified asphalts shall be properly stirred to achieve homogeneity before testing.

Warm the emulsified asphalt to 50 ± 3°C in an oven or water bath. After the sample reaches 50°C, stir the sample to achieve homogeneity.

106.3.94.5 Apparatus

1. Wire Cloth Sieve – 3” round sieve, number 500 mesh (25 um).
2. Receiver/pan/can – metal container of size to collect emulsified asphalt passing the wire cloth sieve.
3. Balance – capable of weighing 500 ± 0.1 g.
4. Water bath – constant temperature, maintained at 50 ±0.5°C
5. Oven – capable of maintaining a temperature of 50 ± 3°C.
6. Thermometric Device – thermometer 15C or 15F as prescribed in Specification E 1, or equivalent thermometric device.
7. Timer – capable of measuring time to ± 5 seconds.

106.3.94.6 Procedure

1. Dilute the emulsified asphalt with distilled water to a residue of 38%, as determined by distillation at 260 ± 5°C (AASHTO T59) or by evaporation for 3 h at 163 ± 3°C. (AASHTO T59).
2. Warm the diluted emulsified asphalt to 50 ± 3°C in a water bath or oven.
3. Tare the receiver/pan. Assemble the 3” sieve and receiver/pan on the balance. Pour 20 ± 0.1 g diluted emulsified asphalt onto the sieve. Immediately after the emulsified asphalt is poured on the sieve, start the timer. After 5 minute ± 15 seconds, remove the sieve from the assembly. Record the mass in grams of emulsified asphalt retained in the receiver/pan.
4. Clean the sieve by rinsing with soft water to remove emulsion. Then wash with Acetone, followed by TCE to remove asphalt solids, and another washing with Acetone to remove any excess TCE and RPE chemicals. Air dry the sieve using a pressurized air hose until moisture is gone, and allow the sieve to return to room temperature before conducting another test.

106.3.94.7 Calculation

Calculate the percent of emulsion passing the No. 500 sieve in 5 minutes as follows:

Mass retained in pan/20 x 100 = % of emulsified asphalt passing #500 sieve

106.3.94.8 Report

The average of three tests for % of emulsified asphalt passing the #500 sieve.