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  • Users: Robertmet
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  1. Robertmet

    Self Healing Concrete

    Here's an interesting development for concrete roadways !
  2. Robertmet

    inorganic/organic concrete

    http://www.dailymail.co.uk/news/worldnews/article-1282773/Sweet-rice-secret-Great-Wall-Chinas-strength-longevity.html Here's an interesting find .Like the pumice addition by the ancient Romans the old ways have their benefits !
  3. Robertmet

    Automotive Info Source ?

    I like to try to keep up with metallurgy of cars and trucks. Is there a source for technical details ? Two items in perticular - "Forged powdered metal piston rods" and the liner material for a new aluminum block that uses a spray type coating instead of an iron liner. These are both Ford...
  4. Robertmet

    Steel Velcro

    Metal velcro has been around for some time but this is a high strength version.I'd like to see what applications develope.
  5. Robertmet

    Wrought Iron !!

    http://www.nydailynews.com/ny_local/2009/08/07/2009-08-07_major_water_main_break_in_tribeca_snarls_downtown_manhattan_rush_hour.html While the article doesn't mention it these water mains are made of wrought iron. This one was put in service about 1870 ! Not too bad a service life .All but...
  6. Robertmet

    Bridge Demolition

    http://jalopnik.com/5316090/detroit-i+75-bridge-collapse-mega+gallery How to demolish a bridge !!This is how they do it in Detroit !
  7. Robertmet

    China - Outrage

    Damaging the structure then permitting traffic under it certainly should cause outrage !!
  8. Robertmet

    Pinned Truss Bridge

    http://www.historicbridges.org/pennsylvania/pondeddy/photos.htm I thought this might be of interest to some.This Pond Eddy Bridge is now going to be replaced. One of the rare examples of a Petit pinned truss bridges still standing.It has connected NY and PA for over 100 years across the Delaware...
  9. Robertmet

    Earthquake Proof Alloy ?

    http://www.popularmechanics.com/science/research/4298122.html " new alloy, which he calls nitinol" New? Do they mean the SMA [shape memory alloy] nitinol that was developed in the '60s ? The budget should be interesting if it includes nickel/titanium alloy rebar !
  10. Robertmet

    Magnetic Bronze ?

    I seem to remember that there is a type of bronze that is slightly magnetic . Is my memory correct ?
  11. Robertmet

    Preservative Grease

    I've learned that my old favorite preservative grease RIG is no longer made .I've used it for many years for tools and firearms and I'd like a replacement .Anyone familiar with RIG who can suggest a replacement ?
  12. Robertmet

    Developing Heat Resistant Steels

    I found this article confusing and wondered if anyone could explain it.The presentation was this morning so perhaps something will show up.
  13. Robertmet

    Bridge Failure Comments

    Here are some interesting comments about bridges as a result of the Minnesota bridge failure.Interesting that you can design but can't inspect bridges !
  14. Robertmet

    Grease Thickeners

    Lubricants are not my field but I came across a list of thickeners for grease.One of them was silica.Maybe I'm missing something but how can you use silica,very abrasive , in a lubricant ??
  15. Robertmet

    Boron detection with SEM

    How good are SEMs , and what type ,are good for detecting Boron in steel ?
  16. Robertmet

    Steel, Nickel vs Toughness

    While it's long been known that nickel improves toughness in steel can anyone tell me why ? My searches have found nothing.The only logical reason I can think of is nickel's aversion to carbon.
  17. Robertmet

    Bridge collapse -Nepal-overload

    Another bridge collapse ,built this year. www.foxnews.com/story/0,2933,318226,00.html
  18. Robertmet

    SS Springs

    I was asked about corrosion resistant springs for a boat trailer used on the Texas coast.These trailers are backed into the water to launch and have to be replaced in a few years .Is there a SS that would do better ? I did some jobs years ago, 1970s, on Padre Island and there you didn't have to...
  19. Robertmet

    Portable Hardness Test

    Does anyone have experience with the portable hardness testers made by www.proceq-usa.com/index.php
  20. Robertmet

    Montreal Roadway Collapse, 2006

    A report on the Sept 2006 roadway collapse in Montreal has been issued .Many worked together to cause it !! www.thestar.com/News/article/268242

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