Grading Road Grading

   / Road Grading #11  
i wish i could work in soil like that, would you like me to send some clay?:D

Shane
 
   / Road Grading #12  
How well would this rig work with crush-n-run?
 
   / Road Grading
  • Thread Starter
#13  
dirtworksequip said:
I was just curious as to how fast people drive since it is so smooth and straight. I would think that it would not wash board as fast or bad if everyone drove in and out at a slow speed. I think the faster people drive the harder it is on the road. What are your thoughts on that?

Sincerely, Dirt
I would tend to agree that our speeder neighbors don't help things out much.
 
   / Road Grading
  • Thread Starter
#14  
rtdiggr said:
i wish i could work in soil like that, would you like me to send some clay?:D

Shane

No thanks, no clay for me. Thanks for the offer though.:rolleyes:
 
   / Road Grading
  • Thread Starter
#15  
tcarter1 said:
How well would this rig work with crush-n-run?

Not 100% sure what that is, would you explain? Is it crushed rock? What size is it crushed down to, 3/8, 1/2, 3/4? Just what is this crush-n-run?:confused:
 
   / Road Grading #16  
While I'm sure someone can give a more detailed explanation, I describe it as a gravel mix of varying sizes. Very common for driveways. When compacted, it makes for a pretty firm bed.
 
   / Road Grading
  • Thread Starter
#17  
tcarter1 said:
While I'm sure someone can give a more detailed explanation, I describe it as a gravel mix of varying sizes. Very common for driveways. When compacted, it makes for a pretty firm bed.

Sounds like what I thought it might be, just a bit finer. With that being the case, I would say that a Road Boss or similar implement would work well with crusher fines. Here's a link to a Road Boss. Road Boss Grader - Road and Landscape Grading, Surfacing and Leveling, and Material Spreading and Reclamation There are many other manufactures that are less money, do some research if your interested.
 
   / Road Grading #18  
There's probably a technical description for it, but limestone is crushed into various sizes 3" 2" etc. What we call crusher run around here has a lot of crushed up fines in it, and rock that's probably no bigger than a peanut. It packs down well because of all the small material in it.

Your road looks like a superhighway compared to what we have with hills, curves, and limestock rock outcropping.
 
   / Road Grading #19  
The phenomenon you refer to is known as "washboarding," a wave-like pattern on unpaved roads that might more aptly be called speedbump ****. As you've observed, the ruts occur with striking regularity, belying a chaotic event like erosion.

According to Tom Pettigrew, a Forest Service engineer, the cause is an unlikely source: your car's suspension. (Well, maybe not yours specifically, but it's not innocent in this matter, either.) A vehicle's suspension system distributes the shock and energy of road irregularities with a bouncing rhythm called harmonic oscillation. At each downstroke, the wheels exert extra force on the road, causing the particles in the road to either pack or displace at regular intervals. Once a pattern of ruts starts to establish itself, it becomes self-reinforcing due to what engineers call forced oscillation. The next car hits the same irregularities in the road and bounces at the same rate, causing the pattern to become more and more defined. Forced oscillation overcomes minor variations in oscillation rate that might otherwise arise due to differences in car weight.

Wouldn't variations in speed affect the washboard pattern? Sure, which brings us to another critical part of the feedback loop: you, the driver. Drive too fast on a washboard road and the downstroke exerted by the car wheels may meet the road at a point where a bump is ramping upwards. You know what that means: You bounce off the ceiling. Instinctively most drivers slow to a speed at which the downstrokes coincide with the troughs between bumps, reinforcing the pattern.

Washboarding is inevitable in any unpaved road that sees fairly heavy traffic. The only way to avoid it is to: (a) radically redesign how automotive suspensions are made, (b) give up suspensions altogether, or (c) keep off those dirt roads.

I too live on a dirt road that I maintain an I find that slightly higher speeds does reduce the washboard formation. Maybe your sheriff is doing you a favor?
 
   / Road Grading #20  
Hey Brian,
Your road looks as smooth as a baby's butt!
Great job and thanks for sharing all those pictures showing how well your road grader works.
 

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