Many years ago, when the first Whole Earth Catalog came out, there was an article about ferroconcrete ship hulls. I read a bit more, and soon found that experiments had been done to find the optimum ratio of steel to concrete for hull strength. It was 100% steel, zero concrete...
Sort of like asking "what handles bending better, candy canes or caramel?"
Sort of like Bart Simpson’s secret to the best PB&J sandwich: no PB; all J.
Right !
The ferroconcrete was recommended for covering Buckey Fuller's Geodesic domes, on the outter shell.
I still have the Whole Earth Catalogue, vol 1, number 1.
I even made a geodesic dome skeleton out of tongue depressors about 12 -14 inches high, and it was able to support my weight (then) of 185 pounds.
I was looking into the dome as for low-income housing; but found that without curved furniture, there was too much wasted space; ideal for air circulation (wood stove), though !