About: http://webisa.webdatacommons.org/189430761

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 was once a cheap waste product; but high demand has made it a high-cost admixture, used primarily for bridges and other structures where top weathering performance and high strength are needed.
http://www.w3.org/ns/prov#wasQuotedFrom	toolbase.org