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Mr. Michael Arpino, P.E.

Federal Highway Adimistration

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RE: Micro vs Macro Fiber Reinforced Concrete

Posted By Michael Arpino 04-17-2018 10:20 AM
Found In Egroup: Horizontal/Subsurface Infrastructure & Transportation \ view thread
​Reinforced structural concrete is under-reinforced by safety code to provide slow ductile yielding of the steel reinforcing before sudden brittle crushing of the concrete. Consideration must be given to the failure mechanism when adding all types and proportions of fibers. ------------------------------ ...

RE: What major safety hazards related to grouting, deep mixing, and diaphragm walls must engineers be conscious of?

Posted By Michael Arpino 05-10-2017 09:57 AM
Found In Egroup: Horizontal/Subsurface Infrastructure & Transportation \ view thread
Murphy was an optimist. I've seen grout come up a mile away in someone else's excavation. I joke (but it's true) we have a million dollar building on ten million dollars of grout. The biggest problem is with unknowns and the claims generated because of them. Your skyscraper next door is moving and your ...