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Constructing Concrete Walkway with Crushed Granite Aggregate

Bob discusses the concrete walk with the contractor. He gives Bob some tips on how to make the concrete cure harder and have less cracks. They then discuss the aggregate, crushed granite that will be added to make the concrete look like granite. They use a special tool to push down the stones in the standard concrete to make room for the aggregate and the colorant. The concrete is allowed to set for four hours then hosed off to expose the granite chips.

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Constructing Concrete Walkway with Crushed Granite Aggregate

computer-generated transcript - may not be 100% accurate

" You guys Lawrence. Specialize concrete here right here we go. Let's talk about the prep work -- I noticed you've got that shape all the way in -- that was designed by our landscape architect that it did act kind of winds its way to the front door off. What is the frame made them different and it out of a one by law went backwards that meet the thickness of the slab will only be poor -- part of -- happen. Now do you need to put down a plastic vapor barrier like you're using here in an exterior situation."

" No we don't bother. I think vapor barrier when it -- All the water in the concrete holding them off on -- from."

" I speak through that concrete will cure more slowly and that's how you get a stronger and a -- yes yeah. But the the main thing the slab is all this reinforcing that goes in here right yes you have. But and -- this is really great pit stop and look like now almost like reinforcing rod. As opposed to the wire region working -- not been put into Nightline exactly. Of the I guess that this has the -- in the middle of the night and that as -- barn will be and that and you got your level line in place right here up. Okay now what about the -- we itself the truck here is there anything special about the concrete -- 3000 pound operation 3000 pound mix that. And and this special feature comes in in the finishing right right well we'll be putting in feminist this aggregate right on the top. Right -- a right after we abhor and let's let her rip and get an act I'm reading here."

" A little -- finally. To -- replied --"

" For a walk we'll."

" Exactly all the -- upon -- yeah. We've brought it in alignment. That. Don't doesn't serve any purpose on the ground."

" Reading it -- in Ottawa that that's the word that means leveling it off yes. And over here he's got a different kind of tool what you call that the -- That's right it will -- and that essentially the first swipe that you make -- at the start moving it out right exactly. As a notified if fashionable political ripples or. If you don't lines not. Not but it doesn't that help put the spoon down bring some of the cream up that we're going to need every. Aggregate. Case that this is the first specialized tool we're using and the objective is to try to bring some of the pure. Cement from a pure Portland up without any aggregated and that. -- custom job that will end up looking a little bit like natural granite what is this material that is happening here that's hair the color on. Put on over concrete. Buried in. Get this column that a conflict though it looks kind of blue grey yes. And they're ground up stone life."

" I'll let that it. --"

" Well normally that the concrete would dry out -- grave red light idea that's right they're have."

" As you can -- wants -- That -- it's threaded it through until like old water base and -- that it spreads across the whole top of the country. Well you really start to see the difference now between that last square that's still the normal concrete you see the olive green there. And the rest of where you put in this cholera or pigment. That's right yeah. Now the aggregate that goes on top is simply crushed granite right that's right and that's it just be scattered along. The property put a lot of it on. What I thought -- and even broadcast following -- I actually was to travel. If the idea is not that the -- big bunch of garbage fight to cast it evenly and yet even. Correct work. Yet another Saudi handles that shovel he let that all come off the side of the shovel and it's all the risks following he's getting it to fly out of there."

" And now another fast was. With the -- look what's that accomplishing. Apparently the village bury the stone woman who actually. Really. Well focal point fingers we'll bring about halfway. That's pretty counter intuitive though I mean you want the look of exposed aggregate and you're burying it. --"

" Having it for them. We get the carpet out on the phone from."

" Hot. All right we've let four hours go by in real time and that's enough stood to let the concrete set up. So that that Portland cement is almost like cream at the top of the bottle you can wash it off now."

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