slab-on-grade - concrete fiber solutions,steel fibers are always evenly distributed throughout the floor while wire mesh and rebar often ends up at the wrong elevation as it gets stepped on or knocked out of position during construction. steel fiber reinforcement allows for a cleaner, safer, and more efficient jobsite with no wire mesh and rebar to create a trip hazard or interfere with concrete trucks and screeding machines..concrete fiber mesh vs rebar,the camper is a fifth wheel, about 10,000 lbs when loaded. rebar is by far the slowest of the three, with its separate rods requiring time for alignment and connection (via ties or welding). this method remains the concrete reinforcing standard around the world, meaning that it is often reasonably cost-effective. rebar prevents it from shearing. :), chicago's concrete, demolition, excavation.
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what is fiber mesh? fiber mesh is actually a fairly modern method of reinforcing concrete. however, unlike the previous two types, this method does not require a framework of steel to be set into wet concrete. instead, this method involves the addition of synthetic fibers, glass fibers, natural fibers, and steel fibers during the concrete application process.
the use of fibers in concrete does not replace wire mesh or rebar. fibers will aid in preventing surface cracking, but do not provide much in the way of support for thermal expansion or shrinkage of the entire slab. concrete quick tips. concrete slab under stove.
rebar is strong and can be placed flat to reinforce concrete or it can stand straight. the same applies for steel mesh. one thing that steel mesh has that rebar doesn't is the ability to shape it. placement difficulty. one issue you'll have is placing the rebar or the mesh. creating reinforced concrete slabs means having to pour the concrete.
the fiber mesh’s job is to help hold the concrete together in that initial drying phase only, and when it cures, does little to nothing to add to the strength of the concrete. so why use is it that contractors will steer you towards substituting fiber mesh for wwf, because the contractor either is pulling the wool over the customers eyes or doesn’t know any better themselves.
fiber mesh concrete is not intended as a substitute for rebar. the two can be used jointly for extra reinforcement, but never use fiber mesh as a substitute. the mesh isn’t strong enough to withstand the weight and force that rebar can.
the fiber mesh strengthens the concrete and the steel rebar reinforces the extra load areas. fiber mesh can adversely affect the finish depending on whether you want a swirl finish, boom finish or exposed aggregate stone finish. the fiber mesh is good stuff but
this gives you a triple whammy of protection. first, the insulation is going to help prevent frost heaving. second, the rebar is going to hold the concrete together against force from up above and the fibers will help prevent the surfaces from succumbing to forces from underneath.
#2043 - 03/22/02 05:16 pm re: rebar vs. mesh vs. fiber: ken administrator registered: 04/12/01 posts: 1219 loc: austin, texas
to be more clear, 4' thick, rebar about halfway inside, so less than 2' above the rebar, and the possibility of it failing it the thin spots. thats why if i used rebar, the slab would have to be thicker. thats just my personal experience with pouring crete, which has been too many to count, in my 9 years.
rebar and fiber do different jobs. fiber reduces hairline cracks and surface spalling. the concrete holds together better but doesn't have any more strength. rebar increases shear and tensile strength. every time a truck or tractor drives on your new slab, there will be a lot of shear stress.
if you make concrete with cfs 100-2 steel fibers at 70 pcy (pounds per cubic yard), you get, on average, 12 fibers in each cubic inch of concrete. no microcrack can go more than a fraction of an inch without running into a fiber. in contrast, rebar designs always space the bars several inches apart, giving microcracks plenty of room in which to grow.
minimum concrete cover over (and to the sides) of the reinforcing bars is 1 1/2-inches, whereas the minimum concrete cover under the rebar is 3-inches. provide construction joints (ie, transverse joint) @ 40'-0' intervals if you have a long driveway.
bars supported on bricks on concrete blocks are better because the workers have enough room to place their feet between the bars, something they cannot do with mesh. fiber reinforced concrete seems to perform better than unreinforced concrete on grade slabs, but it cannot be relied upon to prevent cracking.
don't do any residential work, however i never allow mesh except for shotcrete. contractors belly ache, but the results are far superior. light weight mesh at the bottom of the slab is a total waste of time and money. always use #4 minimum. i don't see that you save much by going with #3's. re: rebar vs. wire mesh.
nearly all steel fibers are limited to replacing temperature crack control steel reinforcement (rebar/mesh) in concrete. comparing the material of the micro reinforcement helix micro rebar is made from 100% steel, which is 600% stiffer than concrete.
rebar’s are strong and thus should be set flat on the concrete or can even be placed in a vertical format. same is the case when we talk about rebars, the difference being that rebars cannot shape the concrete. thickness. the usage of mesh bars
if you put it in the right place during concrete prep, it's likely going to stay there due to rebar chairs, tie wire, and good ole inertia. the majority of rebar's downside is that it carries a drastically higher material and installation cost than wwm.
to be more clear, 4' thick, rebar about halfway inside, so less than 2' above the rebar, and the possibility of it failing it the thin spots. thats why if i used rebar, the slab would have to be thicker. thats just my personal experience with pouring crete, which has been too many to count, in my 9 years.
some projects specifically require the use of fiber mesh concrete reinforcement. for instance, if you are working on a kitchen countertop, the best option is to use fiber mesh concrete. the wire mesh or rebar won’t be the best option for the project. another example is if you need concrete for a thin layer of pavement. cons of the fiber mesh concrete
fiber mesh does not really increase the strength of the concrete, but it can minimize shrinkage cracks. if you are talking about a slab (floor, driveway or patio), there are three choices - fiber mesh concrete, concrete with rebar and concrete with wire mesh. if you are pouring a structural slab, use use rebar. under special conditions you may wish to use fiber mesh also to permit greater rebar spacing.
there are certain pros and cons to both rebar and wire mesh in building projects. rebar provides great high tensile strength and is resistant to corrosion, and there are many different rebar types available to purchase depending on your requirements some of these include glass fiber, carbon steel and galvanized rebars and each have different qualities. for instance galvanized rebars are utilized where corrosion
he said mesh with fiber reinforcement for these reasons: [ul]1. the mesh is welded, providing stability along 2 axes. rebar is tied together to form the pattern (labor intensive, hence more expensive) 2. the fiber in the concrete is especially advantageous in extremes of temperature. 3.
2 answers2. rebar is better in about every use case. the mesh will have to be installed directly in the middle of the slab. the pourers will have to do a lot of work to make sure that the mesh stays there while being poured and moved.
rebar is 'deformed' (the term for the rough surface) and minimum overlaps are spec'd in building codes because the concrete can grab onto the rough surface without slipping. a mat of #3 rebar will cost more to install but is a better system. for control of
