AGSCalabrese ha scritto: > A contractor told me today that concrete has a service life of 80 years. > He said 40 years getting stronger and then 40 years of decline. I was once told that it is 100yrs to get stronger and 100 to decline. Maybe south Italy has a deeper knowledge about concrete :))) Dario -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist