Thanks, Phil! My neighbor came over and used his equipment to rip up about 110' feet of the lower drive. He broke up the pieces as best that he could and we are using them as base. I was out there too, helping as much as possible with the smaller stuff. Things went well. We're done for today because it's 90 degrees, and I had a dentist appointment. My dentist told me cement isn't that much more that resurfaced asphalt. Do you agree with that statement? Also, would we still be able to use the larger chunks of asphalt broken up as a foundation for the cement (assuming it's not much more expensive than asphalt)?
Thanks for your help! I'm going to contact our local building inspector to find out if my city has any requirements. It looks like we're going to rip up the entire drive, even the shallow layer of asphalt (2") that's over the cement foundation. All of the ripped up asphalt will be used as base material somewhere on the existing or expanded drive. I will take your base recommendations above into consideration. It's going to be a major project but it'll save me about 50% versus paying a company to do the entire thing. I got a quote for 4" of cement at $5 per square foot. He said this would be the minimum cost, assuming all the other work is done. It's someone I know and trust. The 3" compacted asphalt quote is $1.25 per square foot plus about $1,000 per day in labor. This job would be at least 1 day, possibly 1.5 days. Roughly, the comparable asphalt cost (with labor) would be about $1.75 per square foot. But we'd have the ongoing maintenance with asphalt that is not the case with cement. It's going to come down to money. But I realize it's pay now or pay later. Any advice?
Phil, I read the article in the link you provided. Good stuff. But I need some clarification on your response about the base. You said previously:
"All of that is quite a science depending on the conditions, vehicles used. On new projects three sizes of crushed rock are recommended, starting with 3 inch on the bottom, then a layer of 2 inch. then some sand, then 2 inch and finally 1 inch crushed rock... minimum of 4" concrete over that. or 2 to 3 inches of asphalt. The base can be anywhere from 6 to 12 or more inches deep depending on the sub soil and load."You said 3 sizes of crushed rock are recommended. But I wasn't sure if you were referring to the depth of the layer or size of rock. Maybe it's 3 sizes (1",2" and 3") but multiple layers of different depths. Any clarification you can provide on this or resources/reference material would be appreciated. Also, remember that we already have an ample supply of broken up asphalt that we're trying to use as bottom base. Thanks!
Hi, Phil! It's me again. Well, fall is here and I need to deal with my driveway situation before the winter comes. My Grandpa died last month, and I've been busy at work and other home improvement projects, so my driveway was put on hold. Now I need to get it done. I read through the links you previously sent. Thanks again. Below is an update on my situation.
For the 100' of our lower drive that my neighbor and I removed the top layer of broken up asphalt with his backhoe, I plan to replace a drain pipe from one side of the drive to the other (any tips on this would be appreciated) and then to put about 2-3" of #57 limestone over it. This should get us through the winter and look nice.
For the shoulder or berm of one side of our drive closer to the house, it's been excavated about 12" deep and to various widths. I originally had my neighbor dump all the broken up asphalt from the lower drive into the trenches. Now I'm thinking that I should do more of what you were talking about in previous posts (crushed stone instead of asphalt as base). What do you think of this post:
Also, if you think it's a waste of time to remove the existing asphalt that I still need to break up into smaller pieces, let me know. But I may have to do this anyway to get a level sub-base. That is, unless I just break up the asphalt and then put other layers of asphalt grindings on top of it and pack the layers down properly. But right now the ground isn't level. It's deeper farther away from side of drive. So I did what's in the link, I'd want to level the ground and put the layers in accordingly. Anyway, let me know your thoughts. Thanks!
Hi, Phil! Well, this holiday weekend (Columbus Day) is when I'm having the stones delivered and spread. Our weather is supposed to be dry and nice. So it's a good time to do this outdoor project.
One clarification I need from you is whether recycled concrete is acceptable as a base. Above you had mentioned only using 'road grade CRUSHED rock'. As of right now (there's still time to change things...lol), for the part of our drive that we're widening, here's what I plan to do:
* I'm having #4 recycled concrete delivered on Saturday morning. It will go over the existing chunks of broken up asphalt to create a base of 6-8".
* After leveling and compacting the #4 down, I'm going to have #304 recycled concrete delivered on Monday and plan to have it 3-4" deep. Again, it will be leveled and compacted.
* Finally, I was going to have #57 limestone top it off at about 2" deep.
If we end up paving this section down the road, I'd put down 411 gravel with fines and pack it down prior to having asphalt or pavers laid down.
For the bottom of the drive, I still plan to have about 2 inches of #57 limestone added to the existing base, which is only about 6" of compacted gravel. Down the road if we end up paving this section, I'm going to need to excavate this lower 100 feet and put in a proper base. The previous asphalt in this section was broken up badly. That's why we removed it and used it as a base for the upper part of drive that we plan to widen. After digging out the old corroded drainage pipe last night (with my neighbors backhoe), I realized how insufficient the base is. But I'd deal with this down the road.
Anyway, I really appreciate your help. I've been reading various things and talking to various so-called "experts" and others, but a lot of their advice conflicts so it get confusing to me sometimes. Any additional help you can provide regarding the wisdom of using recycled concrete (potential runoff issues? stability?) versus asphalt grindings or crushed stone would be helpful. Also, if you have any other tips, I'd be thankful. Thanks for your patience with me. But I guess that's what JustAnswer is for. I'll rate you again you address these other questions. Thanks!
Thanks, Phil! One thing I forgot to ask was should I install some kind of vertical separator to provide support for the stone and keep any roots, etc., from coming under the driveway? We've cleared out a bunch of roots already with the backhoe, but I'm sure they'll come back. Down the road I may add some type of edging on the top to help keep in any gravel. And I do plan to pack the topsoil along the edges. Any thoughts on this last component?
Sorry for the confusion, Phil! We will eventually (5-10 years) either pave with apshalt or brick pavers over this widened drive and also the lower section. But for now we're puttling down the base (asphalt chunks and #4 and #304 recycled concrete contained by clay on sides) and then topping off with #57 limestone (probably contained with some type of edging. When we do pave with asphalt or pavers, we'll add for 411 (and sand for pavers) on top of existing #57. I hope it all works out. Wish me luck!
One last clarification on the weed barrier...are you saying to add that on top of the 304 recycled concrete but below the #57 or am I misunderstanding your suggestion? When you respond, I'll rate you again. Thanks!