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  2. Creep and shrinkage of concrete - Wikipedia

    en.wikipedia.org/.../Creep_and_shrinkage_of_concrete

    In practice, creep during drying is inseparable from shrinkage. The rate of creep increases with the rate of change of pore humidity (i.e., relative vapor pressure in the pores). For small specimen thickness, the creep during drying greatly exceeds the sum of the drying shrinkage at no load and the creep of a loaded sealed specimen (Fig. 1 bottom).

  3. Properties of concrete - Wikipedia

    en.wikipedia.org/wiki/Properties_of_concrete

    Concrete has a very low coefficient of thermal expansion, and as it matures concrete shrinks. All concrete structures will crack to some extent, due to shrinkage and tension. Concrete which is subjected to long-duration forces is prone to creep. The density of concrete varies, but is around 2,400 kilograms per cubic metre (150 lb/cu ft). [1]

  4. Creep (deformation) - Wikipedia

    en.wikipedia.org/wiki/Creep_(deformation)

    The creep of concrete, which originates from the calcium silicate hydrates (C-S-H) in the hardened Portland cement paste (which is the binder of mineral aggregates), is fundamentally different from the creep of metals as well as polymers. Unlike the creep of metals, it occurs at all stress levels and, within the service stress range, is ...

  5. Types of concrete - Wikipedia

    en.wikipedia.org/wiki/Types_of_concrete

    The ingredients in any particular mix depends on the nature of the application. Regular concrete can typically withstand a pressure from about 10 MPa (1450 psi) to 40 MPa (5800 psi), with lighter duty uses such as blinding concrete having a much lower MPa rating than structural concrete. Many types of pre-mixed concrete are available which ...

  6. Structural load - Wikipedia

    en.wikipedia.org/wiki/Structural_load

    Dead loads have small load factors, such as 1.2, because weight is mostly known and accounted for, such as structural members, architectural elements and finishes, large pieces of mechanical, electrical and plumbing (MEP) equipment, and for buildings, it's common to include a Super Imposed Dead Load (SIDL) of around 5 pounds per square foot ...

  7. Flour Bugs Are a Real Thing—Here’s an Easy Way to ... - AOL

    www.aol.com/flour-bugs-real-thing-easy-150000385...

    A food safety expert weighs in on flour bugs, also known as weevils, that can infest your pantry after one TikToker found her flour infested with the crawlers.

  8. Water–cement ratio - Wikipedia

    en.wikipedia.org/wiki/Water–cement_ratio

    A w/c ratio higher than 0.60 is not acceptable as fresh concrete becomes "soup" [2] and leads to a higher porosity and to very poor quality hardened concrete as publicly stated by Prof. Gustave Magnel (1889-1955, Ghent University, Belgium) during an official address to American building contractors at the occasion of one of his visits in the ...

  9. 5 Things to Avoid When You Have Alopecia Areata - AOL

    www.aol.com/5-things-avoid-alopecia-areata...

    4. Not Enough Vitamin D. You shouldn’t get too much sun, but some vitamin D exposure is essential.A review of studies found that people with certain autoimmune diseases may have a vitamin D ...