Polypropylene Vs. Nylon fibers
Polypropylene Vs. Nylon fibers
(OP)
If someone could give me some insight on the advantages and disadvantages of polypropylene and nylon fibers, and give some opinions on what works best, I would really appreciate it. Thanx





RE: Polypropylene Vs. Nylon fibers
I am not a fan of "plastic" fiber in concrete. It has been sold as the panacea of concrete quality, intended to overcome all the ills of poorly controlled concrete processes including mixing, placement, and curing. Steel fibers work well and provide good property enhancement of good concrete.
My caution is to not use fiber as a substitute for good quality concrete from supply to finished product.
RE: Polypropylene Vs. Nylon fibers
RE: Polypropylene Vs. Nylon fibers
RE: Polypropylene Vs. Nylon fibers
Plastic fibres can however be effective in controlling early plastic cracking when the concrete has not yet cured. As Ron pointed out, this can be beneficial, but should not be taken as a substitute for good placement and quality control etc.
Steel fibres or bars have an elastic modulus higher than that of hardened concrete, so are able to carry tensile stresses in cracked concert.
RE: Polypropylene Vs. Nylon fibers
RE: Polypropylene Vs. Nylon fibers
That means you can use it to replace the mesh if you don't need mesh!
RE: Polypropylene Vs. Nylon fibers
I do think fibermesh is great for crack control and "hardening" of the wearing surface.
RE: Polypropylene Vs. Nylon fibers
The enhancement of fiber in concrete material will increase its properties if done properly. Since a strength increase would be realized, there is a probability that the total volume of reinforcement might be reduced as a result of the increase in strength.
RE: Polypropylene Vs. Nylon fibers
Polypropylene fibres have been proven to be very successful in preventing explosive failure of concrete when exposed to a fire. The fibres melt in the heat thus producing air paths through which the air and free water in the concrete body can vent itself.
Fibres are not included in the mix to replace the structural rinforcement, although we in the UK do use fibres in the design of tunnel segments (without rebar) to take small bending moments generated by self weight under handling and tunnel erection loads.