Hi all and thanks in advance for any input/guidance. I need a new driveway. The contractor that I'd like to use is offering two options: 1) 1.5" binder layer with 1.5" top coat; or 2) 2" top coat (ie, no binder) ​​​​​​Option 2 is being offered as a way to meet my budget. My question to all of you is what I'm losing by skipping the binder layer and doing just a 2-inch top coat on top of the compacted soil that'll be left behind after my existing driveway is removed. Is it a terrible idea?? ​​​​​In case it's helpful, here's the SMS conversation between me and the contractor: Him: Lets say I add a 10x15 in that spot you indicated i can rip out and do the 1 coat 2" driveway with the turn around for 5275... that's still a 15 year driveway and you can always overlay it in the future if you feel its not sufficient... is that more within your budget? Me: "1 coat 2" driveway"... Is that the alternative to 1.5" binder + 1.5" top? Him: Yes sir Me: The natural question here is what the consequences are of not having a binder layer... I'll need to educate myself on the two options Him: Just the longevity of 12-15 years as opposed to a 25-30 year driveway really... and as long as the base is done properly you're looking at closer to 20 years for the 2"

Today I poured concrete into 2 forms with rebar hooks that will anchor some chains to the ground, the chains will exert almost no load on the concrete. How long should I wait for them to cure before I take them out of the forms and bury them in the ground? Each block is about 1 cubic foot. (I did a 1:1:2 mix if it matters)