This guy is selling the Basalt rebar, and it has been used in place of steel rebar in reinforced cement hulls. The FRTP Basalt rebar is what he is selling. If someone has found a means to modify the inherent shape, reducing the inherent stress created by bending it, then we can have a curved hull that does not want to be a straight wall. In other words, by modifying the shape of the rebar with heat, the hull reinforcement is not trying to pull the hull apart.
Meanwhile, when steel corrodes, and it IS a matter of ‘when’ not if, it will cause damage, eventually leading to failure.
His methodology description is crude and useless, but the pdf I posted earlier deals with the type of modification I am talking about. I would not be afraid to use heat, to relieve the stress, or modify the shape, but burning the polymer out and rewetting with epoxy is extreme, in my honest opinion.
The significance of a form of rebar that cannot corrode, surely hasn’t been lost on you…?
In a ferrocement hull, the problem is the inability to examine the rebar, which is what leads to the rapid devaluation of ferrocement hulls. With Basalt rebar, that becomes a moot point and there can be a visual record of the construction, to verify the elimination of steel, thus maintaining the value of the hull, for any future resale.
If one made 2 identical hulls, one with steel rebar, the other with Basalt, and documented the whole process, the differences would include a decrease in mass, and a decrease in the hours to make the Basalt rebar hull, along with the fact that the steel will corrode and the Basalt cannot.
The steel one may cost less, materials-wise, but the difference in weight and time could well mean that the Basalt rebar hull cost the same to build. Handling steel rebar is tedious and dangerous, due to the sheer weight and wire-tying. Basalt rebar is typically zip-tied, a much safer and quicker process and the plastic tails are far safer to deal with. However, the FRTP CAN be glued together, making zip-ties and wire-ties unnecessary, and it becomes a game of applying glue, aligning, and clamping until cured, come back, colect clamps and move on.
I learned to hate steel rebar, building concrete slabs. I’ve used rebar from 1/4" on up to 3", between house slabs and slabs for a concrete dam. I am very familiar with the process and the inherent danger of using steel. Not only the mass, but the conductivity and even the toxicity of the coatings. Throw an extension cord across steel and you’re tempting fate. Basalt rebar is non-conductive. There’s another layer of safety, beyond mere mass, in handling.
I’m not the preacher, I’m the new convert in the choir, and I’ve never used it, but I will, now I know it exists.