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  2. Paper bag problem - Wikipedia

    en.wikipedia.org/wiki/Paper_bag_problem

    A cushion filled with stuffing. In geometry, the paper bag problem or teabag problem is to calculate the maximum possible inflated volume of an initially flat sealed rectangular bag which has the same shape as a cushion or pillow, made out of two pieces of material which can bend but not stretch.

  3. Neat volume - Wikipedia

    en.wikipedia.org/wiki/Neat_Volume

    A percentage is typically added to neat volume to estimate loose (i.e. uncompacted) volumes for procurement purposes. With concrete work, neat volume is calculated assuming there is no bowing in the formwork , or, for cast-in-place concrete, that the surfaces in contact with the concrete have no voids or imperfections that would require a ...

  4. Form liner - Wikipedia

    en.wikipedia.org/wiki/Form_liner

    When the masterwork is finished, a cast is made using synthetic liquid rubber, and from this cast, form liners are produced in the reverse image of the original. A form liner panel is placed on the inside of a concrete forming system before the concrete has been poured and acts as a mold for the concrete to be formed against. Once the concrete ...

  5. Barrel (unit) - Wikipedia

    en.wikipedia.org/wiki/Barrel_(unit)

    Both the 42-US-gallon (159 L) barrels (based on the old English wine measure), the tierce (159 litres) and the 40-US-gallon (150 L) whiskey barrels were used. Also, 45-US-gallon (170 L) barrels were in common use. The 40 gallon whiskey barrel was the most common size used by early oil producers, since they were readily available at the time.

  6. 3D concrete printing - Wikipedia

    en.wikipedia.org/wiki/3D_concrete_printing

    A print head that is set too high will reduce the bond strength between layers, causing an unstable shape. [8] A nozzle too close to the printing surface may interfere with the printing process and place additional loads on the concrete. Research proposes a print height equal to the width of the nozzle. [8]

  7. Fluid ounce - Wikipedia

    en.wikipedia.org/wiki/Fluid_ounce

    The US fluid ounce is based on the US gallon, which in turn is based on the wine gallon of 231 cubic inches that was used in the United Kingdom prior to 1824. With the adoption of the international inch , the US fluid ounce became 1 ⁄ 128 gal × 231 in 3 /gal × (2.54 cm/in) 3 = 29.573 529 5625 mL exactly, or about 4.084% larger than the ...

  8. Volume table - Wikipedia

    en.wikipedia.org/wiki/Volume_table

    A volume table is a chart to aid in the estimation of standing timber volume. These tables are based on volume equations and use correlations between certain aspects of a tree to estimate the volume to a degree of certainty. The diameter at breast height (DBH) and the merchantable height are used to determine the total volume. Difficulties ...

  9. Types of concrete - Wikipedia

    en.wikipedia.org/wiki/Types_of_concrete

    Stamped concrete is an architectural concrete that has a superior surface finish. After a concrete floor has been laid, floor hardeners (can be pigmented) are impregnated on the surface and a mold that may be textured to replicate a stone / brick or even wood is stamped on to give an attractive textured surface finish.