red ash ?

'Sulphate-bearing hardcore' it says here:

^^^^^^^^^^^^^^ Were the early nighties followed by the naughties? :-)

Is this the new ailment that makes the leaves look like pom poms and means the tree has to be taken down and everything burned? Brian

Shoulda used SRPC

NT

When colliery waste tips caught fire, they burned for years. The resulting ash was red and used as aggregate for all sorts of things when the tip burned itself out. Mostly in the 1960's

Wasn't aware it caused problems. Have to do some research.

Found this:-

As yongster we had 2 tips near us that we used to play on. One was known as the blacky bing and the other as the red bing. (obvious why) The red bing smoulderd for years until they eventually dismantled it and used it for building roads that would have been in the 60s 70s.

This was another:

Gotta love the sort of gardening you do with bulldozers dump trucks and JCBs....

Looks great for trailbiking

Red Ash is burnt out coal spoil waste. Its found in the middle of coal mine slag heaps. It was used to fill in the middle of houses to bring the floor level up then a concrete screed lay on top. It was found that some of the acids in the ash caused the screed to disintegrate.

The land will be permanently polluted with heavy metals, maybe even radioactive. The last place you want to buy a house is there.

Indeed. Suphurous coal will in addition to meiting Sulphur oxides make certain sulhur style comounds with te dah, taht can turn to sulphuhuric acid when wet.

Turning cement from insoluble carbonates to soluble sulphates over time. Same as brick acid.