About: http://webisa.webdatacommons.org/249852578

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	Air is also often purposely entrained in concrete and other cementitious systems because of the properties it can impart to the fresh mixtures.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com