Test for Bitumen Emulsion: Viscosity by Saybolt Furol Viscometer

目的

Viscosity indicates the resistance to flow due to its internal friction. Higher the viscosity, lower the rate of flow. The test is conducted to see if it is in the specified range. The Test result is expressed in seconds for the flow of 60 cc of the emulsion sample through a 3.8 mm diameter orifice under the specified conditions of the test.

Apparatus

• Saybolt Furol Viscometer
• Stop watch

Procedure

1. Clean the oil tube with a solvent, such as benzene, and remove excess solvent from the gallery. Pass the entire material through a 150 micron wire strainer before introducing into the oil tube.
2. After the tube is cleaned, pour into the tube a quantity of the material to be tested, sufficient to wet the entire surface of the tube. Allow to drain out.
3. The plunger commonly supplied with the viscometer shall never be used on instruments maintained as standards. Insert the cork stopper not less than 6.0 mm and not more than 9.5 mm into the lower end of the air chamber at the bottom of the oil tube, taking care that the cork fits tightly enough to prevent the escape of air, as tested by the absence of oil on the cork after it is withdrawn.
4. If the test temperature is above that of the room, heat the material to not more than 1.5⁰C below the temperature of test.
5. Pour the material into the oil tube until it ceases to overflow into the gallery. Keep it well stirred with the oil tube thermometer, care being taken to avoid touching the outflow tube. Adjust the bath temperature until the temperature of the material remains constant.
6. After thermal equilibrium has been attained, no further adjustment shall be made in the bath temperature. The test results shall be discarded if the indicated bath temperature varies by more than +0.03⁰C.
7. After the temperature of the material in the oil tube has remained constant within +0.02⁰C的所需温度持续搅拌一分钟，借助于取出管迅速取出油管温度计，从廊道上迅速去除剩余液体，使得画廊中材料的水平低于油管的水平恰当的。将抽出管的尖端插入画廊的一个点。
8. 如果提取管的尖端触及溢出轮辋，则应重新开始测试。在没有条件下，通过在画廊周围旋转抽出管来除去多余的液体。
9. 将接收烧瓶放置在位置，使出口管液流撞击烧瓶的颈部，注意到接收烧瓶上的刻度标记不小于10cm，不超过13厘米，从浴缸底部。从其位置捕捉软木塞，同时启动定时器。当液体的底部底部到达接收烧瓶颈部的标记时，停止定时器。
10. Time in seconds as determined by the prescribed procedure, with the proper calibration correction, is the Saybolt Furol viscosity of the material at the temperature at which the test is made.
11. Report the results to the nearest 0.1 second for viscosity values below 200 seconds and to the nearest whole second for values 200 seconds or above.

Reporting of Result

通过上述过程确定的时间以秒为单位，具有适当的校准校正，是测试在测试的温度下的材料的Saybolt Furol粘度。

Report the results to the nearest 0.1 s for viscosity values below 200s and to the nearest whole second for values 200s or above.

Reference

IS 3117 – 1965

Requirement Criterion

根据：8887 -2004，不同类型乳液的粘度验收限制如下。

乳液类型	验收限制500C
Rapid Setting (RS-1)	20 – 100
Rapid Setting (RS-2)	100 – 300
Medium Setting (MS)	50 – 400
Slow Setting (SS-1)	20 – 100
Slow Setting (SS-2)	30 – 150