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  2. Concrete - Wikipedia

    en.wikipedia.org/wiki/Concrete

    The American Concrete Institute (ACI) definition of cold weather placement, ACI 306, [128] is: A period when for more than three successive days the average daily air temperature drops below 40 °F (~ 4.5 °C), and; Temperature stays below 50 °F (10 °C) for more than one-half of any 24-hour period.

  3. Types of concrete - Wikipedia

    en.wikipedia.org/wiki/Types_of_concrete

    The design begins by determining the requirements of the concrete. These requirements take into consideration the weather conditions that the concrete will be exposed to in service, and the required design strength. The compressive strength of a concrete is determined by taking standard molded, standard-cured cylinder samples.

  4. Properties of concrete - Wikipedia

    en.wikipedia.org/wiki/Properties_of_concrete

    The ultimate strength of concrete is influenced by the water-cementitious ratio (w/cm), the design constituents, and the mixing, placement and curing methods employed.All things being equal, concrete with a lower water-cement (cementitious) ratio makes a stronger concrete than that with a higher ratio. [2]

  5. Frost damage (construction) - Wikipedia

    en.wikipedia.org/wiki/Frost_damage_(construction)

    Therefore, when concreting at cold temperature cannot be avoided, it is essential to have a minimum curing time at a temperature sufficiently above the freezing point of the concrete pore water, so that the early strength of concrete is high enough to resist the inner tensile stress caused by water freezing.

  6. Air entrainment - Wikipedia

    en.wikipedia.org/wiki/Air_entrainment

    Air entrainment in concrete is the intentional creation of tiny air bubbles in a batch by adding an air entraining agent during mixing. A form of surfactant (a surface-active substance that in the instance reduces the surface tension between water and solids) it allows bubbles of a desired size to form.

  7. Electric cars in winter: How cold weather affects EV range ...

    www.aol.com/electric-cars-winter-cold-weather...

    The most recent test, conducted in January 2024, found the HiPhi Z, a Chinese E, lost just 5.9 per cent of its advertised range when driven in cold weather, while the Polestar 2, Volvo C40 ...

  8. Cement accelerator - Wikipedia

    en.wikipedia.org/wiki/Cement_accelerator

    A cement accelerator is an admixture for the use in concrete, mortar, rendering or screeds. The addition of an accelerator speeds the setting time and thus cure time starts earlier. [ 1 ] This allows concrete to be placed in winter with reduced risk of frost damage. [ 2 ]

  9. Yes, That Really Was [Redacted] and [Redacted] Singing in ...

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    Idina and Kristin performed a brand new song in the movie. The pair’s surprise appearance occurred during the “One Short Day” sequence, in which Erivo’s Elphaba and Grande’s Glinda ...

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