Tractor Talk Discussion Board |
Re: Re: Chert
[ View Follow Ups ] [ Post Followup ] [ Return to Tractor Talk Discussion Board ]
Posted by Jim WI on July 13, 1999 at 11:08:31 from (192.159.76.19):
In Reply to: Re: Chert posted by RMD on July 10, 1999 at 12:39:48:
Around here, concrete companies advertise "chert-free" concrete. Chert is a soft stone that will absorb water. When concrete containing chert is subjected to freezing temperatures, the water expanding in the chert causes it to pop out of the surface of the slab.
Follow Ups:
Post a Followup
|