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looks like dodgy DIY patches with cement to fill holes in the concrete floor [ Invalid Attachment ]
What no high-heels? Very impressed at you walking on wall - is this an ovine speciality?Could it be an accretion from a drip coming down from ceiling. We are taught that stalagmites (and -tites) take millennia to form; but I have seen round blobs start to form in London Underground stations. I guess that these drips are able to dissolve more minerals and thus able to deposit more than the purely natural ones.The mini-stalagmite I am thinking of is at Mile End - but the station is undergoing a major refurb, and I am not sure if they will have got rid of the floor lumps. i'll take a photo for comparison if I can still find them.Matthew
Acid rain can erode stonework ... http://en.wikipedia.org/wiki/Acid_rain#Other_adverse_effectshttp://www.bradlewis.com/concretesealing/concretedrivewaysealing.php
Here are piccies from Mile End Station. FYG Mile End is quite an old underground station and has always had a leaky ceiling. These little moundy things are at various places on the platform - and before they redid the ceiling they were in the places of the persistent drips (I am sure in a couple of years they will be dripped on again) [ Invalid Attachment ]
What no high-heels? Very impressed at you walking on wall - is this an ovine speciality?
Could it be an accretion from a drip coming down from ceiling. We are taught that stalagmites (and -tites) take millennia to form; but I have seen round blobs start to form in London Underground stations. I guess that these drips are able to dissolve more minerals and thus able to deposit more than the purely natural ones.The mini-stalagmite I am thinking of is at Mile End - but the station is undergoing a major refurb, and I am not sure if they will have got rid of the floor lumps. i'll take a photo for comparison if I can still find them.Matthew