hey guys dave pangio from remodeling hq and uh today we're going to take a look at a cement slab it's a it's a 4x4 section of concrete in front of a house we had a con we had a sheetrock delivery truck pull up on the front lawn and the weight of the truck ended up cracking a section of sidewalk so i wanted to show you a quick little four by four section that we're going to replace so we had to pulled out the concrete that was broken up and you'll see the 4x4 section let's take a look at what we're about to do okay so here is the sidewalk and what happened was the double wheels of the tire from the truck itself pulled up and cracked the sidewalk it was hollow underneath what happens is a lot of times the ground underneath these sidewalks sinks and the sidewalk is one cement solid slab and what happens is the ground just sinks the concrete will stay the way it is but if a lot of pressure gets on top of it uh it'll just cave in so what we're about to do is so we cleaned out the concrete we broke it up it takes about 10-15 minutes uh we threw it into this into this dumpster over here and uh we made a uh we took a 2x6 we cut it down the middle and uh just what we're gonna do is we're gonna we're gonna fill this up with concrete very simple we're gonna mix up some sakrete mix and uh you can see the form uh what we did is we're gonna make both ends even with the form and we'll fill it up with concrete um and uh then we'll smooth it out you can see the sidewalks not in the best condition that's an old gravel stone concrete mix so we're going to finish it semi smooth and and shouldn't take more than about a half an hour to mix it up we got about 10 bags i'll show you how to mix this up we'll also show you the amount of bags that you're going to have to need to calculate for any of your projects let's take a look at the calculation chart so the section of concrete that we need to fill is four by four and it's about four inches on an average so we're going to take a look at the chart right here here is the uh here's the concrete chart uh it tells you area in square feet so we have 16 square feet four by four four feet by four feet it's telling you uh uh four feet let's see on 16 square feet uh you're going to need approximately 10 bags so what we're going to end up doing is there's also what you can do is you can go to there's a website here let me see if i can find it on here oh here it is sakrete.com mobile and you put in your uh you put in the length and the width and then the height goes in inches and it'll tell you how many bags based on an 80 pound bag this is this here's an 80 pound bag they also have 60 pound bags so you just do a quick calculation you can find out in this case we need 11 bags so all you really need now is just a small mixing tub a bucket for water and a little mixer they call it a garden hoe and you can put the bag we're going to just dump the bag in one by one and pour the water in mix it up quick and throw it in there and fill it up what i like to do is make a little hole in the middle right in the middle of the cement and then take my water and just pour it in don't worry about it being too soupy because we have 11 other bags to make to mix so in less than two and a half minutes we just mixed our first bag and just simply line it up pour it right in that's it okay that's one now just repeat the process make your hole nothing crazy don't waste a lot of time pour your water right in the middle add a little extra it's no problem and then take your heart garden hoe and just mix it up okay so you can see we're about 25 minutes in and we have three more bags left so we're in really good shape we'll mix this one up they'll fill a big portion of that hole right there and then the other two will will level off uh the lower sections so we're in really good shape uh the concrete calculator worked and uh let's finish up mixing and then i'll show you how to smooth this off okay guys so we just got done mixing up all the cement and i simply took a trowel and we troweled over the cement the sakri and you can see there's some water on there so what i'm going to do is just simply work the water downhill get it off the off the slab and you can see just let it go on to the side and what we're going to do is we're going to um give this one shot right now with the steel trowel we're gonna push all the all the water right off and what's gonna happen is uh we'll get the water off and uh still a little bit too much water on it so we'll push the most uh as much water off as we can and uh then we'll let it sit for about 25-30 minutes i have some other things to do and uh we'll come back and hit this with the steel trowel one more time and probably in about an hour it's going to be all set okay so you can see the slab we finished it up we smoothed it out with a steel trowel and then we edged it with an edger around the corners and uh just got to dry up we broomed it with the small little broom and literally i think the the longest part was just waiting for the water to dry it's still a little still a little uh wet there you can see on the top right but for the most part we're good for now uh and uh this completes the replacement 4x4 slab on the front sidewalk home editions analytics complete home remodeling become a subscriber you'll see all our videos shot on location in new jersey thanks click on the button right over here thanks