Moon bricks. Ship regolith and dust into orbit from the moon, mix with water to make a moldable clay, form into bricks, bake inside the mother of all solar kiln

Moon bricks. Ship regolith and dust into orbit from the moon, mix with water to make a moldable clay, form into bricks, bake inside the mother of all solar kilns and then drop them down on Earth. The water should be recoverable if the kiln is air tight. This would greatly reduce fuel needed on earth for construction. You could even make the reentry vehicle out of baked clay, only parachutes would need to be added. Extra points if you can make the whole thing buoyant and land them in the ocean.