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Wilma Caldwell
Architectural technologist
Asked a question 2 years ago

What Concrete Grade Should be Used for Basement Waterproofing?

What grade of concrete to be used for waterproofing of basement of apartment?

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Raul Jimenez
Senior Project Manager

Water proofing is done using shotcrete not concrete. Basement should be built using concrete . Water proofing can also be done by polymer membrane systems called tanking ( refer to CIRIA). 

I used ACI 506 to design shotcrete. Its should be of 28Mpa strength using 12mm down aggregates.

Terry Collins
Sustainability consultant
concrete is not meant for this however in old days a mortar of cement and pan crush was used known locally in indopak as chips plaster