r|2==2AgFz,2 U@22_:430 Oct 2008 20:35strengthratio%9.0g%8.0gCompressive strength (psi)Water/cement ratioh (psi)p@/\b@D@Kzt@A@2q=@7\B?Rף@@HG@4p @I33@<ף?U?P?Kq=z@?I@F ׋@2p@9