About: http://webisa.webdatacommons.org/366586670

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	Silica fume, or other pozzolans such as fly ash, slag or calcined clay such as metakaolin, can be added to the cementitious dry cast mixture in an amount from about 5% to about 70% based on the weight of cement.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com