Wednesday, August 11, 2010

Math related construction

Welcome to free math tutoring,

suppose you were designing a concrete freeway over-pass.
One of the things you would need to understand is how the concrete
cures as a function of time. similar exercise on free math
How long does one 'batch' need to cure
before construction can continue? When does it need to be tested?
How long until the bridge can be opened to regular traffic? (Concrete
appears to 'dry' in a day or two, but actually does not reach its full
strength for over a month!)

Well, it turns out that the strength of
the concrete as a function of time is described by an equation of the
form S=c(1-e^-kt) where S is the strength at time t and c and k are
constants specific to the type of concrete you are using. (How strong
is the concrete at time t=0? How strong is it as t approaches
infinity? How long will it take to get to half of its final
strength?) more examples on free math help.

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