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For a theory reference i have to agree with Qshake, Chopra's "Dynamics of Structures: Theory and Applications to Earthquake Engineering" is excellent.

With greater precompression forces you'll certainly increase the likelihood of blow-outs and increase congestion of rebar/tendons. You might want to choose a concrete mix design with higher strength and lower viscosity.

Roger - there are a number of causes of concrete deterioration primarily: alkali-silica reaction freeze-thaw damage corrosion of reinforcing bars sulfate attack physical forces (abrasion, impact, etc) Because you are asking about sulfur pits, as concrete engineers the first thing that comes...