%0 Journal Article %T The study of compressive strength in different cement types and dosages of concretes made by using 60% pumice and 40% perlite %A M. Haluk Celik %A M. Durmaz %J Contemporary Engineering Sciences %D 2012 %I %U http://www.m-hikari.com/ces/ces2012/ces5-8-2012/celikCES5-8-2012.pdf