+ Each concrete car before venting into the container of the pump will be tried right slumps in place with standard taper with the requirements ensuring the slump. Not reached not used.+ Concrete pour for each class according to the height just enough length of the tongue intermittent punching. ensure all swamp, not miss, not getting evenly layered and dense.+ Maintenance of clean water concrete under TCVN 4506-87 started watering after 6 ~ 8 hours from now pour is complete, every day watering 3 ~ 4 times lasted 7 ~ 10 days.
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