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  1. bluesman

    Concrete cube testing problems

    the indirect tensile strength (splitting strength) test measures the concretes resistance to being pulled apart, it's carried out on a standard cylinder specimen by applying a tensile force to a concrete cylinde specimen placed on its side. flexural test measures the ability of a beam or slab...
  2. bluesman

    KIPS

    Each Time I come along such discussion it never fails to surprise me that with all the advancement in the engineering technology today, the world is not yet able to really use one unit system that can be applied everywhere! I don't really see the point in sticking with prejudice to an out dated...
  3. bluesman

    Jordanian Wind Design

    FisherStruct You can call : 1. Jordan Engineers Association JEA http://www.jea.org.jo/ info@jea.org.jo Tel ++962 6 560 7616 Fax ++962 6 567 6933 2. The royal scientific society http://www.rss.gov.jo/ rssinfo@rss.gov.jo Tel: +962 (6) 5344701 Fax: +962 (6)5344806 3. Jordan Institution for...
  4. bluesman

    Duranautic

    mweng; In general: A "Duranotic Finish" is an anodization process used for coating aluminum the end result is a dark bronze look. Drop By !! www.geocities.com/concretesite
  5. bluesman

    What's the time needed before weight applied?

    Guys I used to work with several ready mixed concrete suppliers. Take my word for it, don’t trust any data they provide! What would I like to add to what you guys mentioned is : Remember that the concrete is mix-designed for average mean strength not the specified (required) strength which...
  6. bluesman

    Education Tips???

    Luk; Here are some links that you might find helpful: 1. what is civil engineering? http://www.rose-hulman.edu/Class/ce/HTML/whatis.html 2. The Top Ten Public Works Projects of the Century http://www.apwa.net/About/Awards/TopTenCentury/ 3. Some of the century's top architects and engineers...
  7. bluesman

    Allowable amount of Unhydrated Cement Particles???

    Just to add to what Ron said many factors affect the amount of the unhydrated cement like time, temperature, curing and fineness of cement besides the water content of the mix. As the temperature increases the hydration of the cement increases and the HYDRATES (the result of the hydration of...
  8. bluesman

    Removing shale from aggregate

    The Use of screening to remove shale or other lightweight aggregate from river sand is normally unsuccessful. It is very difficult to control the raw feed rate, and as a result, it is practically impossible to maintain a uniform, shallow bed depth (the depth of the material passing over...
  9. bluesman

    Creep of concrete

    Here are some references for you : D. E. Branson, Deformation of cncrete structures (McGraw-Hill international book company) A. M. Neville, Creep of concrete A. M. Neville, W. H. Dilger and J. J. Brooks, Creep of plain and structural concrete (construction press, 1981) Also see..... ACI...
  10. bluesman

    Flexural strenght versus compressive strenght

    A quick but unreliable coloration is to consider the compressive strength to be eight times larger than the flexural strength. This ratio depends on the level of strength of the concrete, that is : the higher the compressive strength the lower this ratio becomes. As the tensile strength...
  11. bluesman

    Flexural strenght versus compressive strenght

    adelfahmy; start a new thread i will help you with the L-box inquiry Drop By !! www.geocities.com/concretesite
  12. bluesman

    7 day concrete strength

    If the concrete was supplied from a batch plant, the thing you should ask for is the "age-strength correlation" not the strength gain curves, as the former will give a better estimate of the predicted strength based on the true 28days strength using different Q/C systems such as the...
  13. bluesman

    7 day concrete strength

    charlierock, Many spec's set a "specimen age correction factor" to predict the 28-days compressive strength from the results obtained at an older or younger age. The most commonly used factors are : Age Factor (Multiply By) --- ------ 3 2.5 7 1.5 28...
  14. bluesman

    what are kind of fibers which use in concrete

    In addition to the manufactured fiber products that Rjeffery mentioned, carbon and Kevlar (a type of Polymer just like polypropylene) are also used in Fiber reinforced concrete. Natural fibers are also used such as asbestos, sisal and cellulose... studies showed promising results when shredded...
  15. bluesman

    Bird control

    This might sound funny but if the problem is severe and the netting doesn't help. If the pudget allows, why don't you consider laser dispersal? It’s effective, safe, humane and environment-friendly. Take a look at the following sites...
  16. bluesman

    Testing residential foundation poured in cold

    Dear Fredhead... I wouldn't want to be in your shoes right now! All you have been told in replies to your post in all the forums (which by the way are technically correct information) must have alarmed you and scare the hell out of you ..... Take this simple advice..... Wait till the concrete is...
  17. bluesman

    Batching Plant concrete Yield

    Do I get this right? The wet density of the yielded concrete is lower than expected from the design? Or the actual cement used at a given period is more than the cumulative cement content of the produced concrete? What were the yielded wet density and the expected one? Are there any changes in...
  18. bluesman

    Why consolidatate fresh concrete?

    Placing and compaction are interdependent and carried out simultaneously as they are important to ensure the required strength, permeability and durability. The purpose of compaction isn't just to force the concret to flow and the particles into a closer configuration but also the elimination of...

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