Stages experienced in the development of preventive maintenance process micro-surfacing
In recent years, micro-surfacing has become more and more widely used as a preventive maintenance process. The development of micro-surfacing technology has gone through roughly the following stages to this day.
The first stage: slow-crack and slow-setting slurry seal. During the Eighth Five-Year Plan, the asphalt emulsifier technology produced in my country was not up to standard, and slow-crack emulsifiers based on lignin amine were mainly used. The emulsified asphalt produced is a slow-cracking and slow-setting type of emulsified asphalt, so it takes a long time to open the traffic after the slurry seal is laid, and the post-construction effect is very poor. This stage is approximately from 1985 to 1993.
The second stage: With the continuous research of major universities and scientific research institutes in the highway industry, the performance of emulsifiers has improved, and slow cracking and fast setting asphalt emulsifiers have begun to appear, mainly anionic sulfonate emulsifiers. It is called: slow cracking and fast setting slurry seal. The time spans from about 1994 to 1998.
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2024-05-11