What causes a driveway to washboard?
Thanks for the link. It has been dry here. I thought that speed was a factor and the link said you need to go 3mph or less. I have some people who fly in my drive way.
I am not exactly sure about the what you mean about rain on of camber area's. Do you mean water washing across?Rain on off camber areas and vehicles accelerating or slowing from/to a choke point.
It is a straight portion. I have not seen water running on that portion of the driveway.Are you referring to the "washboard" effect on straight, flat semi-soft surfaces or hilly gravel lanes etc?
[just my observations and experience]
the former is usually caused by the dynamic action of a vehicle (on tires) and speed where the latter is often caused by run-off creating one or more minor "dips" that eventually induces a rhythm of a moving vehicle that compounds and expands the issue
Buppies said:In my limited experience vehicles cause this. You could install 21a pug mill stone compact it properly and solve this for a while but it will come back. Surface treating or paving are two ways to solve the problem
Buppies said:Prime and double seal or tar and gravel. There are three coats involved. Tar is crs-2 applied at rates of .30 gal per square yard, .35 gal per square yard, final coat .35 gal psy. Stone at30 lbs of 68s,35 lbs of 78s, 35 lbs of # 8 s. this would solve wash boarding