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Recent content by pevans

  1. pevans

    Retardating Plastic Concrete

    I'm not an engineer. YET Take a look at Recover by Grace, and Delvo by Masterbuilders. I have seen both used successfuly in the long term retardation of concrete.
  2. pevans

    coldpatching

    It appears that what you are describing is a 'cold joint'. Such joints occur when fresh concrete is placed against hardened concrete. Most structural drawings include a detail for cold joints, which are triggered when placements are interrupted. If the crack appears to be at an angle nearly...
  3. pevans

    suitable bedding for RCP storm drain

    We are in the process of monitoring the installation of approximately one mile of 18" Reinforced Concrete Pipe for storm drain purposes along a major road improvement project. The pipe will have 5 feet to 10 feet of cover. The contractor originally intended to use a one-half sack or better...
  4. pevans

    International Engineering Opportunities

    The comments from georam are right on the money. One often overlooked opportunity is the scheduling of the FE, or E.I.T. exam. You may generally take this exam, a prerequisite for the P.E. exam, while still attending college. This is the perfect time to take this test, since it is a test of...
  5. pevans

    Slump reduction with time

    Recently, on a 50%R.H. day, Temp of 75 deg. F, concrete trucks arrived with susicious consistency. The maximum allowable slump for the prduct code as submitted for approval was 5". Approx. 1 cy of concrete was discharged onto the ground, and a sample was taken for a slump test. The...
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