Russell griffiths Posted September 30, 2021 Share Posted September 30, 2021 I’ve just been told I can use a light weight fill material on top of my treatment plant, anybody got any trade names or makers of this stuff, I’ve seen it, looks like volcanic balls about 15mm in diameter. Cheers russ. Link to comment Share on other sites More sharing options...
Mr Punter Posted September 30, 2021 Share Posted September 30, 2021 Leca is one I have heard of. 1 Link to comment Share on other sites More sharing options...
gravelrash Posted September 30, 2021 Share Posted September 30, 2021 sewage treatment plant? Link to comment Share on other sites More sharing options...
Russell griffiths Posted October 1, 2021 Author Share Posted October 1, 2021 14 hours ago, gravelrash said: sewage treatment plant? Yes. Link to comment Share on other sites More sharing options...
Haylingbilly Posted October 1, 2021 Share Posted October 1, 2021 There are different sizes depending on application and some come with a percentage of topsoil mixed in. I used it but ordered the wrong size, and they supplied it with topsoil mixed in by mistake. Great stuff, but double check size and mix - luckily it was their mistake so they had to pick up 10 cubic metres incorrectly delivered. We used Bourne Amenity as our supplier Link to comment Share on other sites More sharing options...
saveasteading Posted October 1, 2021 Share Posted October 1, 2021 Usually people are worried about holding down their tanks (against flotation) , and heavy fill would be an advantage. Can you explain the logic of using expensive lightweight fill? lytag is probably the biggest name and almost a generic name now. Looks like smarties when redder than this pic., made from power station ash, and used in concrete to keep the weight down....at a cost. Link to comment Share on other sites More sharing options...
gravelrash Posted October 2, 2021 Share Posted October 2, 2021 Most tanks are designed that once the main tank body is concreted or strapped then you just backfill above with soil or gravel. I would worry the tank is not strong enough if it had to be light weight backfill Link to comment Share on other sites More sharing options...
Russell griffiths Posted October 5, 2021 Author Share Posted October 5, 2021 On 01/10/2021 at 11:53, saveasteading said: Usually people are worried about holding down their tanks (against flotation) , and heavy fill would be an advantage. Can you explain the logic of using expensive lightweight fill? lytag is probably the biggest name and almost a generic name now. Looks like smarties when redder than this pic., made from power station ash, and used in concrete to keep the weight down....at a cost. The reason I was thinking on lightweight fill was I have an 1000mm invert into the tank leading to 1100mm of fill on top of tank, standing here looking at the hole I reckon there’s 5-6 tonne of soil to go on top. It just looks a lot when you are staring at it and thinking too much. Link to comment Share on other sites More sharing options...
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