On Thursday, 21 March 2019 13:33:31 UTC, Jim GM4DHJ ... wrote:
On 21/03/2019 12:05, Chris Hogg wrote:
On Thu, 21 Mar 2019 11:29:08 +0000, "Jim GM4DHJ ..."
wrote:

just caught a bit of homes under the hammer heard red ash problems
mentioned ...what is that ...never heard of it ....

'Sulphate-bearing hardcore' it says he
http://www.cpservicesuk.com/red-ash-...--removal.html
The sulphate reacts with the overlying concrete screed, causing the
latter to expand, bulge and crack. A problem common in coal mining
areas, apparently. Although why it's called 'red ash' isn't explained.

right saw that kind of thing happen to a new warehouse floor at glasgow
airport in the early nighties...thanks

Shoulda used SRPC


NT