# Determination of Residue of Bitumen Emulsion

## Purpose

This test is done for the determination of residue of bituminous emulsion by sieving through 600-micron is sieve.

## Apparatus

• 600 Micron IS Sieve — A circular sieve approximately 100 mm in diameter and 40 mm height.
• Metal or Glass Dish — A small metal or glass dish about 110 mm in diameter (such as a clock glass).
• Oven — A well ventilated oven thermostatically controlled to 100 to 110 “C.
• Balances — One of capacity 250 g and accuracy of 0.01 g and one of capacity 10 kg and accuracy of 1 g.
• Container — A clean, weighed, 1.5-litre container.

## Procedure

1. Wash the 600 micron IS sieve with xylene and then acetone. Place it in the dish, dry in the oven at 1000C to 1100C for one hour, cool and weigh, together with the dish, to the nearest 0.01g (W1).
2. Remove the sieve from the dish and moisten with the solution. Remove uniformly the 4-litre sample by gentle agitation and strain immediately through the sieve into the clean, dry weighed container (W4).
3. Sieve the low and high viscosity emulsion at room temperature and 500C respectively. When whole of the emulsion has passed through the sieve, remove the sieve and weigh the container to the nearest 1 g (W2).
4. Wash the sieve repeatedly with distilled water until the washings run clear. Place the sieve in the small dish to dry for two hours in the oven at 105±50C. Cool and reweigh together to nearest 0.01 g (W3).

Calculate the Residue as follows:

Residue, percentage retained = (W3 – W1) / (W2 – W4) x 100

Where

W1 = mass in g, of sieve and small dish

W2 = mass in g, of container and emulsion

W3 = mass in g, of sieve, small dish and residue; and

W4 = mass in g, of container

Take the average of three values obtained for residue, percent.

## Requirement Criterion

 Type of bituminous emulsion Residue on 600 micron IS sieve Rapid Setting-1     (RS-1) 0.05 Rapid Setting-2    (RS-2) 0.05 Medium Setting     (MS) 0.05 Slow Setting-1      (SS-1) 0.05 Slow Setting-2      (SS-2) 0.05

IS 8887 – 2004