Stabilizing.

   At the moment I'm working with a stabilizing crew. For the unititiated this is a process where a lime & cement mix is rotary hoed into the road, often with extra "make up metal". This is done to problem areas where the road foundation is breaking down, often because of poor drainage. " The lime agglomerates clay particles into coarser particles through base ion exchange as well as producing a cementing or hardening action."
   The lime is spread onto the road and watered.

When water hits the lime & cement mix, it fizzes and crackles. The reaction causes a lot of heat. (This is something you have to watch for if you are trucking it and it begins to rain!)
The Hoe is a very Manly thing. It munches the road up at about half walking speed, in this case to a depth of 300mm
   A grader then shapes up the road again, it is rolled and watered and left for a day or more to cure before being sealed. A "running course" of very fine chip is left on to stop the traffic chewing it up.