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  • Users: JJF
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  1. JJF

    Concrete finishing with rock salt

    We are finishing an area around a swimming pool and one of the finishes being considered is a textured stone finish. I was told rock salt was pressed onto the surface and then rinsed off after the concrete set up. Any thoughts? My concern is the long term effects: surface spalling/cracking...
  2. JJF

    Cathodic Protection for pier

    I've got a client with a 1/4 mile pier into a brackish (salt and fresh water mix) river. Over time, the painted steel pipe piles have started to corrode. The plant currently uses an impressed current and sacraficial anodes to protect (or reduce) the pile corrosion but this does not appear to...
  3. JJF

    Boring under existing piping

    I need some suggestions............ I've got an existing refinery that some very old and very wide below grade pipe trenches. I've got to route some new utility (power) under them (+/- 3'-0" below bottom of trench) In most areas, directional drilling will work. In one area, I have no outlet...
  4. JJF

    Problem with a Guyed Stack

    We are replacing some equipment stacks and after a number of problems with the existing building steel we are at last down to the guy wire hold downs (deadman). The existing stack has three single cable tiedowns with a turnbuckle connection to the deadman. The new stack will have three PAIRS...
  5. JJF

    Cutting Rebar in existing slabs

    I am very familiar with ACI-318 (and several other ACI publications) but have never come across an analysis of the impact of cutting a single piece of reinforcement in an older (+ 50 years) existing slab. Does anyone have an article on this? Thanks.

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