sand coffering
1CONCRETE — Concrete is a compound made from sand, gravel, and cement, while cement is a mixture of minerals that become hard when water is added, binding the sand and gravel into a solid mass. Although concrete is traditionally considered an Ancient… …
2Western architecture — Introduction history of Western architecture from prehistoric Mediterranean cultures to the present. The history of Western architecture is marked by a series of new solutions to structural problems. During the period from the… …
