Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

Register Log in
  • Congratulations waross on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. wsheppard

    Fibre Reinforced Concrete

    You might take a look at PVA (polyvinylalchohol) fibers. This has very good pull out resistance, won't make the slab 'fuzzy' because it doesn't float and lends itself to better mixing/distribution. At 12mm a 1.6 pound per yard mix is a good starting point, up to around 2 pounds. In larger...
  2. wsheppard

    Rain water on footings

    re: waterproofing concrete There is a product called 'Densicrete' that you should take a look at from WickTek (www.wicktek.com) This has been used for years in waterparks, commercial roofs, etc., but is still rather unknown. Independent lab tests as well as actual years in the field have shown...
  3. wsheppard

    Concrete Floor Loading

    I'm not exactly sure if you are asking about surface damage or structural, but I'll assume you mean surface. Increasing the density of the concrete (see densicrete www.wicktek.com ) will certainly help, and there are also coatings ( see www.spraycrete.com ) that will help a lot. I think that...
  4. wsheppard

    Thinnest slab for residential 40 to 60 psf?

    Thanks for the kind words. Here's more specific info - Flat Roof - I can buy EPS foam in 8" thick sheets for almost exactly $1 per foot. EPS gives an R value of 4 per inch, so 8x4=R32. Lay a solid layer of this on top of the shoring. Next we need beams. It's trivial to setup an...
  5. wsheppard

    Parking Garage Water proofing

    I would suggest you take a look at DensiCrete. www.wicktek.com This is a one time permanent application that is used by waterparks, PA DOT, commercial roofing, etc. It is applied via a low pressure (Hudson garden type even) sprayer and will not only provide waterproofing, but will mitigate...
  6. wsheppard

    Thinnest slab for residential 40 to 60 psf?

    First of all notice that I'm NOT a strucural engineer. But I am building a mostly concrete home, and have faced some of the same issues. A few things to consider - 1. Overhead slabs without insulation will transmit a lot of contact noise. Not much ambient noise though. Tap shoes suck. 2...
  7. wsheppard

    Does anyone have any vertical load

    Does anyone have any vertical load data on corrugated steel pipe? We need to construct a support column with an internal chase. So using an outer pipe of 34", and an inner pipe of 24", and then pouring between the two is the plan. The only data I can find so far ignores any value of...
Back
Top