structural
structural
(OP)
good day to all...
we are doing the construction of a water tank...we are on the phase where we are constructing the RC walls...
this is the case: our inspector required us to get beam samples for the retaining walls and do the test for the modulus of rupture...
my question : is it necessary?
fyi : we haven't established the parameter for the modulus of rupture...
thanks and more power...
we are doing the construction of a water tank...we are on the phase where we are constructing the RC walls...
this is the case: our inspector required us to get beam samples for the retaining walls and do the test for the modulus of rupture...
my question : is it necessary?
fyi : we haven't established the parameter for the modulus of rupture...
thanks and more power...






RE: structural
If your specifications do not require testing for the modulus of rupture and the structural engineer did not use it for the design of the retaining wall, it is unnecessary to test for it. If you have no specification for it, then you also have no acceptance or rejection criteria upon which to base an interpretation of the results.
RE: structural
RE: structural
RE: structural
RE: structural
Beam testing is finicky...if the technician doesn't know how to properly fabricate the beam in the field and the lab tech isn't familiar with the nuances of testing beams in the lab, then the results won't mean much anyway.
While I agree with strucguy that it can be used, the MOR is only one aspect of testing for QA and does not do a great deal for maintaining the quality of construction. There is a good liklihood that the mix design used for the tank construction was not a design based on MOR, but compressive strength. There's a difference.
RE: structural
We are just finishing the final touches on a project that has been drawn out for a year by a debate over spec on a concrete tank. The project was a concrete tank that would not stop leaking. Upon start of the project, I would have disagreed with cvg, but my opinion now is they are very very difficult to make water tight, but not impossible.
In hind sight make sure your specs are water tight, because if your tank leaks this will be where everyone pulls out the guns. Have descriptive leak tests, time periods of testing defined, definitions of dampness...anything you can think of to make sure everyone involved knows what is considered a "leak proof tank".
The quality control is difficult for you to enforce despite your best efforts, unless you are the concrete sub, so again, cover yourself with a good spec.
And by the way, yes we did get it to stop leaking. Water tight concrete is possible.
RE: structural
one thing, is there any code(s) that would technically back-up these concepts and would also practically specify when are test specimens for rupture are required?...
thanks again and more power....
RE: structural
RE: structural
Specifications for Structural Concrete Buildings, ACI 301-89
Chapter 16 "Testing".