About: http://webisa.webdatacommons.org/22436594

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Photo is a section of the mortar phase of concrete, and it shows the etched surface on a concrete with quartz sand fine aggregate in which the paste was undercut.
http://www.w3.org/ns/prov#wasQuotedFrom	dot.gov