After my Bomber mission bit the dust i am aking a fighter mission. ia amakinga airfield from scratch but i cna't find the concreat sand bit that I wan't for my senary is there anyway to get hold of this where is it where can i find it ect?

I think the only concrete you can add to create an airfield from scratch is one of the Test Runways found under Stationary Ships. It's probably easier to create a grass field or one with a steel matting runway if you're going to start with an area of unused ground.