So, now, before moving onto the next stage of the construction, there's the important step of waterproofing the ground beam. This is done mainly to avoid water from seeping through the land through the ground beam concrete which will make it conducive for algal growth (as the pic i found in the internet below)
So, in order to avoid this, bitumen are spread onto the inner surface of the ground beam as they make it waterproof (see pics below...the black stuff is bitumen)
Rightio folks...later
By way of (getting tired...but still going) AAMMJ
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