随老化时间的延长和老化温度的升高，沥青的胶体不稳定指数逐渐增加。

With the prolonging of aging time and the going up of aging temperature, the unstable index of asphalt's gel increases gradually.

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前言：文章对高锰酸盐指数加热时间、滴定温度、速度、滴定终点的控制进行了探讨。

This article discusses the acidic potassium permanganate method of permanganate index from the following aspects: heating time, titrate temperature and titrate speed, end point of titration.

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对于文中研究的液滴，无量纲完全蒸发时间随烟气温度变化呈指数递减规律。

For the droplet considered, the life time of droplet reveals the index declining rule along the flue gas temperature varying.

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