It is a 10' x 12' slab that will support walls on two sides. As I am in the South, I plan on a 12" x 12" footer on those two sides. I wasn't planning on using wire mesh with the fiber additive, but thought the rebar would still be a good idea. True?
2007-11-03 08:29:16 · 9 answers · asked by smithy1023 1 in Home & Garden ➔ Do It Yourself (DIY)
In the footing would to a great idea, continuous horizontals and stirrups [] size of bar needed depends on weight to be supported by walls. If it is a very light weight structure eliminate the stirrups.
2007-11-03 08:41:43 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Concrete Fiber Additive
2016-11-08 01:05:52 · answer #2 · answered by haven 4 · 0⤊ 0⤋
This Site Might Help You.
RE:
If I am using concrete with fiber additive, do I still need rebar?
It is a 10' x 12' slab that will support walls on two sides. As I am in the South, I plan on a 12" x 12" footer on those two sides. I wasn't planning on using wire mesh with the fiber additive, but thought the rebar would still be a good idea. True?
2015-08-12 18:35:06 · answer #3 · answered by Kayce 1 · 0⤊ 0⤋
Any time you build a wall, you should use a footing unless you are using a floating slab foundation.
You say you are located in a south location - hope this means no frost.
Also if you have a lot of rainfall and/or ground water you have to make sure water is drained away from the slab so it does not undermine it.
In either case you have to make sure you are on and non organic undisturbed ground. If you do not do this, your foundation will eventually move and crack even with re-bar and wire mesh.
You seem to be considering a floating slab foundation.
Excavate down to non organic undisturbed ground and fill in with a good grade of packing sand (sand and clay mixture) which has to be compacted with a tamper every six inches.
Do this until you have reached the level desired for pouring your concrete.
It would be advisable to incorporate the footer with the slab - all one pour. Also make the footer on all sides of the slab.
The width of the footer should be at least 18 inches wide and 12 inches deep plus the thickness of the slab.
If your slab is 6 inches thick, around the boarder for 18 inches wide it should be 24 inches thick. The inside of the footer should taper up at about a 45 degree angle to the six inch thickness.
Place at least two rows of re-bar along the footer.
Wire mesh should be about 3 inches from the top surface.
I am assuming the walls are masonary (block, brick, concrete, etc)
Use block-lok every 2 or three rows of block in your wall if you are using block. Every 12 to 16 inches if you are using a brick on brick (veneer type structure) with tie bricks.
Make sure the top of the walls are caped and sealed
If your area has frost that penetrates into the ground, you will have to design for the freezing and thawing as this can crack, move, and heave the slab.
DO NOT ATTACH A FLOATING SLAB TO A STRUCTURE THAT HAS A FIXED FOUNDATION!
Hopes this helps
2007-11-03 10:04:37 · answer #4 · answered by Comp-Elect 7 · 0⤊ 0⤋
The fiber additive is supposed to eliminate the need for rebar, however, I like to place a few pieces in a slab anyway. It doesn't hurt and rebar is cheap. An old piece of wire fencing works well and its cheaper yet.
2007-11-03 10:40:45 · answer #5 · answered by rico3151 6 · 0⤊ 0⤋
Since you plan to use part of the "slab" as a foundation, YES, you'd want to rebar the foundation portion.
I've never tried this "Fiber additive" and have always used wire mesh on any slab I've poured.
Good Luck with your project
2007-11-03 09:14:37 · answer #6 · answered by mariner31 7 · 0⤊ 0⤋
Believe me when I say that rust on rebar makes no difference onde the concrete is poured over it. If you where to hang around construction site, you would see that about 90% of the rebar or mess that are used on driveways or walkways, all have rust built up on them. Please don't worry. Good luck. I work in the construction field. See it just about everyday and I haven't seen it be an issue yet.
2016-03-22 16:04:25 · answer #7 · answered by Anonymous · 0⤊ 0⤋
yes you need rebar the fiber is to help keep spider webbing from developing.
2007-11-03 09:49:03 · answer #8 · answered by oildog#1 3 · 1⤊ 0⤋
--->> Tips---> https://trimurl.im/g10/if-i-am-using-concrete-with-fiber-additive-do-i-still-need-rebar
2015-08-04 22:00:07 · answer #9 · answered by Anonymous · 0⤊ 0⤋
yes,if possible ,bend them and tie them so they won't collaspse,also,if there are any old matresses near you,either cut out he steel to use ot burn the maresses and bring the steel
2007-11-03 11:22:23 · answer #10 · answered by Anonymous · 0⤊ 0⤋