Roman concrete was a mixture of
a. water, tufa, travertine, and rubble.
b. water, mortar, gravel, and rubble.
c. stucco, plaster, water, mortar, and rubble.
d. tufa, rubble, gravel, and mortar.
b
Art & Culture
a. water, tufa, travertine, and rubble.
b. water, mortar, gravel, and rubble.
c. stucco, plaster, water, mortar, and rubble.
d. tufa, rubble, gravel, and mortar.
b