What are the Advantages of Using a Reinforcement Mesh?

Reinforcement Mesh is also called reinforced welded mesh, welded mesh, building mesh, welded mesh, reinforced mesh, etc. Reinforcement mesh is a mesh made by longitudinal and horizontal reinforcing steel crosses through binding or welding. Reinforcement mesh can be divided into: shaped reinforcement mesh and formulated reinforcement mesh. Rebar material: CRB550 grade cold-rolled ribbed steel bar; (threaded steel mesh). Reinforced mesh is widely used in the construction of beams and columns, roofs, walls, pavements, bridge decks, highway cracks, airport runways, tunnel linings, box culverts, dock floors, factories, etc. engineering.

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Reinforcing Mesh With Ribbed

The building reinforcement mesh is firstly made of high-quality low-carbon steel wire, stainless steel wire with Reinforcing Mesh With Ribbed or cold-rolled round steel bar at right angles in the longitudinal and transverse directions, and all cross-welded at a certain distance. Construction steel mesh is divided into hot-dip galvanized, electro-galvanized, PVC coated, dip plastic, special welding mesh, mainly used in bridges, highways, tunnel backing panels, high-rise floors, subway culverts, power plant projects, dam foundations, Various reinforced concrete structural projects such as ports, docks, river walls, airport runways, etc.

Advantages of reinforced mesh:

1) Significantly improve the quality of reinforcement engineering

2) Significantly increase construction speed

3) Enhance the crack resistance of concrete

4) Has better comprehensive economic benefits

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5) Save labor

6) reduce engineering costs

The welded mesh of the building reinforcement mesh should be made of CRB550 grade cold-rolled ribbed steel bar, or CRB510 grade cold-drawn smooth steel bar. A piece of welded mesh should be welded with the same type of reinforcement. Welded meshes are divided into two types: shaped and customized. The spacing and diameter of the reinforcing bars in the two directions of the shaped welded mesh can be different, but the reinforcing bars in the same direction should have the same diameter, spacing and length, which have been specified in relevant standards and regulations.

The Concrete Reinforcing Mesh Manufacturer will briefly answer a few questions below.

Q: Do roads need to be reinforced?

A: The upper part is compressed and the lower part is tensioned. The bending strength must be improved, and the concrete pavement must be flexed.

Q: What is anti-cracking reinforcement mesh?

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The primary methods to prevent early age cracking are concrete quality, finishing, and curing. The primary method to control longer term cracking is subgrade preparation. For heavily loaded slabs, increased thickness and discrete reinforcement are the best controls.

The use of fibers is limited to non-structural purposes, with few exceptions. This is primarily because the distribution and orientation of fibers is not assured. Distributed fibers help reduce crack width by encouraging development of multiple, small cracks, or in some cases, helping to improve the properties of concrete which reduce cracking. Once cracks start to grow, they are controlled by the modulus and area of fibers and reinforcement crossing the cracks. The modulus of plastic fibers is far below that of steel (- ksi for plastic v 29,000 ksi for steel.) The use of discrete (conventional) reinforcement assures that crack width is controlled once they start to grow. In slabs, this is usually relatively less important, but we have been seeing quite a few large companies move back to conventionally reinforced slabs after finding that fiber and unreinforced slabs did not perform well enough. Some slabs where poor performance was seen were well prepared and cracking was the result of loading and/or restraint, and the lack of reinforcement allowed wider crack propagation and/or vertical faulting.

In reinforcing an indoor slab, small, closely-spaced bar or wire will generally control cracks better than larger, widely-spaced reinforcement. Having reinforcement closer to a surface will restrain cracks on that surface better.

State of the practice for design of slabs is provided in ACI 360:

Construction practices are covered by ACI Committee 302:
This is due for an update, and the committee is now doing that. hokie66....
TXstructural....

EXACTLY!!

Fiber is an enhancement to the concrete mix....it is not reinforcement
It increases both the flexural (good) and compressive strength (not so much) (steel fiber only...polypropylene is worthless...as noted by hokie66)

I spent about 10 years on the ACI Committee for fiber concrete. It was a constant effort trying to keep the BS out....fiber provides some help, but it does not replace reinforcement and its crack limiting capabilities are limited as well.

The most significant effect that I've seen with fibers (steel fibers, again), is a reasonable increase in the modulus of rupture. Thanks Folks,

Seems to be a hotly debated topic.

The application I am considering is for a sand & aggregate storage shed (quarry). The floor (on grade) will be subject to loads from plant and materials. My approach is to design a floor slab which is suitable for use and to simplify its construction as much as possible.

Therefore, I am considering a deep slab (200mm / 8") with 1 no. layer A252 mesh (bottom) with fibre mesh reinforcement within the concrete mix. This will allow me to increase control joint spacings and allow for larger pours. The slab will be laid on graded hardcore well compacted in 9" layers. The slab does not need to be a super flat floor nor is the application the interiro of a 5* hotel, with a tiled finish, therefore, it does not need to be over-designed in terms of crack control. Primary objective is functionality & durability.

The viewpoints above are all valid and informative, many thanks.



murdydrum
chartered engineer
Depending on the soil type, an 8" slab for moderate loading should be OK... you can check the design. A good high strength concrete, low slump, sawcut into proper sizes at the right time and curing should all be used. I'd probably use regular reinforcing steel properly chaired and not WWM/WWF. I'd skip the fibres completely, steel and/or polypropylene. The former should be used if there is heavy equipment moving on the slab. In addition to the rust noted by MM, they are really difficult to work with.

Dik I stick by my recommendation to use steel fibers, based on the desire to minimize the need for crack control joints in an industrial slab where they're storing sand and aggregate. The slab will be subject to heavy abuse, both from the product itself, and it's likely that front end loaders will be used... they'll tear up the joints! The use of steel fibers allows larger slab areas to be poured without joints.

For normal industrial floors, I'm all for reinforcing bars (mesh is a joke), but you generally cannot stretch the joint spacing with reinforcing, and it does nothing for durability and abrasion resistance. Steel reinforcing is normally placed in the upper 1/3 of the slab to control cracking, rather than being used for bending strength, so it generally doesn't help you there. Murdy stated his "primary objective is functionality and durability". Steel fibers give you that... improved bending strength, crack control, fewer joints, abrasion resistance, lower maintenance costs, etc., etc..

Msquared... you seem real hung up on the fuzzy/rusty floor thing. Have you ever seen a properly constructed steel fiber floor? The fibers to not stick out. Sure you'll get a little surface rust, but who cares? This is an industrial building that somebody is dumping rock and sand on, and running over with heavy equipment.

Another suggestion to increase strength and limit joints, Is the post-tension the slab. Post-tensioning can also be used to reduce the thickness of the slab. While I agree with spats's basic premise, I do not agree that the use of fiber will allow no joints. It will allow different spacing of the joints (distance between joints can be a bit more), but it will not preclude the use of joints.

An hokie66 noted, the toughness of the slab will be increased by the use of fibers.

As dik alluded, don't let the fiber addition substitute for sound concrete mix design and placement practices.