What is the difference between vibratory roller machine and light effect

When the cement stability level, why should first use of vibratory roller, and then light? What is the difference of their role, without vibration pressure several times to replace smooth wheel roller OK?

Answer:

You should use the cement stabilized layer of vibratory roller. It should be the first to use vibratory compaction, and without vibration for smooth. Just don't open vibration pressure several times, just to reach the surface of static compacting, but the bottom is still relatively loose

Just don't open vibration pressure several times, just to reach the surface of static compacting, but the bottom is still relatively loose

You should use the cement stabilized layer of vibratory roller. It should be the first to use vibratory compaction, and without vibration for smooth.