Widening asphalt driveway with gravel

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Old 04-10-14, 05:15 AM
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Widening asphalt driveway with gravel

Hi all, my wife and I just bought our first home. We have an asphalt driveway that we want to widen by eighteen inches on one side.

I have read that you can do this by digging out a couple inches of earth, putting down weedblock, then: compacting the earth, adding big gravel; compacting the big gravel; adding small gravel; then compacting the small gravel.

Is there any reason why, instead of renting a tamper/compacting machine, we couldn't just lay down gravel, then drive over/park on it it till it's sunk/compacted, then lay down more gravel?

Thanks!
 
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Old 04-10-14, 05:22 AM
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What you describe is the poor man's approach and what most people do. When digging it's best if you can get down past the topsoil and I would go at least 4". You can put in a couple inches of stone then drive the car back and forth to compact then add another couple inches. Generally I use "crusher run" with is a stone mix that varies by quarry and region but for me it is a blend stones up to 1 1/2" all the way down to dust. The various sizes fill all the nooks and crannies and it compacts well to form a solid base. It's what is often used on gravel roads.
 
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Old 04-10-14, 05:48 AM
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Both crusher run and it's smaller cousin, chat have a good deal of stone dust in it. The dust kind of acts like a binder to fill the voids between the rocks. IMO it's preferable to 'washed' rock. Stone dust will track more but after it's been rained on a few times the dust pretty much stays in place.
 
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