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

Reference

IS 8887 – 2004