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Surrey, United Kingdom Gb

What is the effect on soil that has been contaminated with cement mortar




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I'm pretty certain that cement mortar is alkaline so may raise the soil pH slightly. However I would imagine that the biggest problem will be that when it gets wet it is going to go lumpy. If it is only a very small amount it probably won't really matter too much but otherwise, I would suggest clearing the 10-15cms of affected soil and replacing it with top soil from another part of your garden (or buy some bags of top soil/soil conditioner from your local garden centre ) and mix it up with the existing soil.

29 Mar, 2010

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