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  • Users: khinz
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  1. khinz

    Stress-Strain Curve of Structural Epoxy (type IV)

    I've searched for over an hour in the internet for the stress-strain curve of type iv structural epoxy and can't find this. Anyone knows where to get them? I need them asap. I need to know the portion in the curve where young's modulus (hooke's law) apply and what tests they did to derive the...
  2. khinz

    High Modulus Repair Material

    For structural repair such as foundation, beams, columns where part of the concrete have to be replaced and it has to share the compression and tensile load. What repair material with modulus of elasticity close to concrete that you normally use? How about non-shrink grout, what is its modulus...
  3. khinz

    Compression vs Compressive Strength

    The change in length of a compression member formula has the formula PL/AE where P is load, L is length, A is area and E is modulus of elasticity. How does it relate to compression strength like 5000 psi? Is it when maximum compression is reached that the 5000 psi would manifest? Is the pound...
  4. khinz

    location of lift joints

    For special moment frames, what is the best location of column lift joints (connections between partial pours)? Some said at midspan because it has less shear and moment. Some said below beam-column joints (although others thought that it has maximum base shear in floor so not allowable). Where...
  5. khinz

    Carbon Fiber Reinforced Polymer

    What is your experience with Carbon Fiber Reinforced Polymer in retrofitting columns for more seismic resistance? What are its pros and cons as far as your personal experience and research with them is concerned? Can it help more in the axial load capacity rather than bending moment capacity and...
  6. khinz

    multi-layer pipe system vs ppr piping system

    which is better for water line, multi-layer pipe system vs ppr piping system? what is the advantage and disadvantage?
  7. khinz

    Compressive Strength of Rebar (vertical)

    Of course I know since ages ago that concrete has strong compressive strength and poor tensile strength. We always specify the compressive strength of concrete by say 4000 psi. How about a rebar? I know it's tensile strength is in unit of say 414 mpa for a 20mm grade 60 rebar, how about the...
  8. khinz

    Rebars Compression Splash Point

    Please give references of how a rebar behave when there is say a 2mm gap in the column. Would the rebars just bend outwards for a given load? Let's say the rebars is a 20mm grade 60. So do you compute for the axial load needed to bend the bar in the gap or just splashing outwards in compression...
  9. khinz

    Checking bad concrete mix

    How do you check for bad mix when the concrete is still solid say inside a column or beam (meaning not the honeycomb section)? and what is the compression strength for a bad mix.. say the original is 4000 psi.. would it become 2000 psi or just 500 psi? how can you use a hammer to test a bad mix...
  10. khinz

    concrete placement in long column

    For long column (3 meters), what is the proper way to place concrete at the bottom? It seems by pouring it from the hole above (long distance) and with many stirrups crisscrossing the path, there may be some slump separation as the concrete fall down the bars causing segregation at the bottom of...
  11. khinz

    column splice for 16 to 24 rebars

    I know splice for column rebars is at midspan of columns.. but how do you distribute them so they won't be at one layer or location for a small 400x500mm 16 to 24 rebar column? any papers or guidelines about this in the net for comparisons? thanks.
  12. khinz

    Column discoloration

    What is this discoloration in the lower part of the column? it's not honeycomb because I tried hammering it and there is no honeycomb. Anyone has encountered this? How do you fix it?

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