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.
Duncan was named the 1997-98 NBA Rookie of the Year. He has helped the Spurs win five NBA championships and has been named to 15 All-Star teams. The Spurs havenât drafted in the lottery since. 1999: Manu Ginobili is selected with the 57th overall pick from the Italian team Viola Reggio Calabria. Three years later, he made his NBA debut and has helped the Spurs win four championships. 2001: Drafting at No. 28 overall in the first round, the Spurs select French point guard Tony Parker.