I have excavated for a gravel driveway and added well compacted scalpings, it has been raining since this time and the scalpings are soft and pudding like! The quarry says they will go like concrete when dry. Is this so and how long will it take? I cannot drive on the scalpings as my vehicle will leave ruts. I have not covered with the gravel yet. Scalpings been down for 5 days.