I have been drafting the concept of a future world based on current research. I have been contemplating the long lasting transportation tunnels of the future. I am asking about the likelihood of the following building method:
Notes: Granite is abundant and has extremely high strength and durability. New carbon based materials are breaking tensile strength records. There have been breakthroughs in self-healing waterproofing.
Proposed Building Method:
Tunnels cut. Cracks filled and surface covered with self healing waterproofing material. Then coated with abrasion resistant material.
Granite blocks precisely cut for perfect fit in tunnel assembly. 4 hole drilled through the block.(Two through one face, and two through a perpendicular face) Blocks then coated in self-healing waterproofing and abrasion resistant coating.
Blocks moved roughly into position. Carbon based cords weaved through the holes. Cords then pulled tight pulling the blocks into position and cords tied off on themselves.
Would this type of building method be stronger than our current concrete and rebar?