adding to the garage slab

[dusterbd13]

ok, i have finally realized that i have project ADD. i start one and never finish it. now im trying to.
one of my next projects to finish is my garage. when we cut the doors in, we left hole in the slab where the block was. on one door it is roughtly 8 inches wide by 10 food long. the other is 8X3.
i would like to pour concrete to make it looked finished, and already have a mixer at the house to do the job. im just not certain how to go about it. i know i need to make a form, which i will be doing with a 1X6 even with the outside wall of the house, held in with rebar. i also know i need to clean out all the debris and loose gravel from the pour site. after that, im lost.

anyone have any sugestions? im also worried about the new part cracking or looking like crap. so i gues the question is how do i do this a little more specifically than read the instructions on trhe bag and follow, and the other is are there any special concerns with attaching it to the old slab?

thanks for any help yopu can throw a newbys way. its sad. i can build furniture or a car, but i have no idea how to do concrete other than to fill a post hole.

Michael

[Fireeater]

Mike,

Try and get a couple of pictures of the spots needing fill. If it is against another slab of concrete then you will need a piece of expansion joint between the two. Get the pictures and we can go from there.

Dave

[harshman]

Find a concrete guy that finishes well and let him do it. Anyone can pour but it takes experience to finish a slab right.

[6sixty6lemans]

Pictures would definately help. Doesn't seem like too tough of a job to do yourself, especially if your trying to save a few bucks. If you can work on cars you can definately pour some concrete.

[Paul_J]

There are several bonding agents you can use when adding to an existing slab. Most are for pouring over the top of existing concrete. Check out some of the stuff from Shepler's Performance Products. As long as you tie back into the existing slab you should be fine for a garage floor.

[dusterbd13]

sorry this reply of pioctures took so long. between my wifes morning sickness, working late, and family obligations, i havent had a spare minute till now.

so here is the pictures. the one with the Mazda in it is the deeper of the 2 places.









so let me know what i can do to finish these out. i only want to extend the slab out even with the rest of the wall. and then i can finish the gravel and make a nice enterance into the garage.

Michael

[Fireeater]

Put a piece of expansion foam in between the old slab and the new being poured. Frame out the front and sides, pour easily into space and float it. The reason for the expansion foam is to keep it a clean line across the two. It is really not necessary because the concrete can expand into the gravel, but it will give a nice clean line butting up the two.

Dave