Of these, silica fume is the most reactive, with metakaolin being close to silica fume in terms of reactivity. Fly ash is less reactive, especially during the first few days of curing when less calcium hydroxide is generated. Generally the finer the pozzolan particles are, the more reactive they are. Silica fume is the finest with most particles averaging 0.3 Âµm (microns), metakaolin averages about 4 Âµm, Portland cement averages about 15 Âµm, and fly ash about 70 Âµm. Many pozzolans are waste products from industrial processes.
The most recent Rookie of the Year winner is Karl-Anthony Towns. Twenty-one winners were drafted first overall. Fourteen winners have also won the NBA Most Valuable Player (MVP) award in their careers; Wilt Chamberlain and Wes Unseld earning both honors the same season.
Griffin made his NBA debut as a rookie the following season, in which he was selected as an All-Star, won the NBA Slam Dunk Contest, and was named the NBA Rookie of the Year. In 2011, Sports Illustrated called him one of the NBA's 15 Greatest Rookies of All Time.e played college basketball for the Oklahoma Sooners, when he was named the Consensus National Player of the Year as a sophomore. Griffin was selected first overall by the Clippers in the 2009 NBA draft, and is a five-time NBA All-Star and a four-time All-NBA selection.