Betograve
Encyclopedia
Betograve is a type of concrete sculpting. A document published by the Nasher Sculpture Center
Nasher Sculpture Center
Opened in 2003, the Nasher Sculpture Center is a museum in Dallas, Texas that houses a collection of modern and contemporary sculpture. It is located on a site adjacent to the Dallas Museum of Art in the heart of the Dallas Arts District...

 says that betograve "...involves first pouring concrete into a form tightly packed with gravel, and, once set, precisely sand-blasting the surface of the concrete to expose the gravel beneath it".
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