trammayo
Interested in vintage commercial vehicle, trams, t
I used Thermolite/Celcon Blocks on 3 of my earlier Railways going as far back as 1983. Moved from 1983 line in 1987 then built another line using them moved from that in 2000 to another which was left in 2012. All were still in near perfect condition when I left. Would appear to me that these blocks stop egress of Water thus discouraging Frost Breakup as shown in Stockers Pics of Concrete Blocks. Though having said that I have used Breeze Blocks in the Ruschbahn 2004-2013 and my curent line 2013 (which also has Concrete Blocks cos they were the cheepest) to present with no sign of damage. So you pays yer money and takes yer blocks.
JonD
You would think that aerated blocks (by their very description) would allow moisture penetration which might then suffer from frost damage! But obviously they don't. Cannot get them out here unless you buy by the pallet load.