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  2. Concrete slump test - Wikipedia

    en.wikipedia.org/wiki/Concrete_slump_test

    The test is carried out using a metal mould in the shape of a conical frustum known as a slump cone or Abrams cone, that is open at both ends and has attached handles.The tool typically has an internal diameter of 100 millimetres (3.9 in) at the top and of 200 millimetres (7.9 in) at the bottom with a height of 305 millimetres (12.0 in).The cone is placed on a hard non-absorbent surface.

  3. Rebar - Wikipedia

    en.wikipedia.org/wiki/Rebar

    Rebar (short for reinforcement bar or reinforcing bar), known when massed as reinforcing steel or steel reinforcement, [1] is a tension device added to concrete to form reinforced concrete and reinforced masonry structures to strengthen and aid the concrete under tension. Concrete is strong under compression, but has low tensile strength.

  4. Grinding wheel - Wikipedia

    en.wikipedia.org/wiki/Grinding_wheel

    The wheel type (e.g. cup or plain wheel below) fit freely on their supporting arbors, the necessary clamping force to transfer the rotary motion being applied to the wheels side by identically sized flanges (metal discs). The paper blotter shown in the images is intended to distribute this clamping force evenly across the wheels surface.

  5. British anti-invasion preparations of the Second World War

    en.wikipedia.org/wiki/British_anti-invasion...

    Smaller cylinders cast from concrete are also frequently found. [83] [84] Pimples, popularly known as Dragon's teeth, were pyramid-shaped concrete blocks designed specifically to counter tanks which, attempting to pass them, would climb up exposing vulnerable parts of the vehicle and possibly slip down with the tracks between the points. They ...

  6. List of DIN standards - Wikipedia

    en.wikipedia.org/wiki/List_of_DIN_standards

    ISO general purpose metric screw threads – Part 4: Nominal sizes for 0,75 mm fine pitch threads; nominal diameter from 5 mm to 110 mm: Active: DIN 13-5: ISO general purpose metric screw threads – Part 5: Nominal sizes for 1 mm and 1,25 mm fine pitch threads; nominal diameter from 7,5 mm to 200 mm: Active: DIN 13-6

  7. More than a dozen states have passed new laws that led to ...

    www.aol.com/more-dozen-states-passed-laws...

    Proponents of the laws say they’re simply taking advantage of new technologies that make online age verification more feasible than it was in the past – essentially putting the same practices ...

  8. What is the AIP diet, and can it reduce inflammation? A ... - AOL

    www.aol.com/news/aip-diet-reduce-inflammation...

    The Autoimmune Protocol (AIP) diet is an elimination diet designed to help reduce inflammation, manage symptoms and improve quality of life for people with autoimmune diseases.

  9. ISO 5775 - Wikipedia

    en.wikipedia.org/wiki/ISO_5775

    It is designed to make tire sizing consistent and clear. It replaces overlapping informal systems that ambiguously distinguished between sizes. For example, at least 6 different "26 inch" sizes exist (just by American notation), and "27 inch" wheels have a larger diameter than American "28 inch" (French "700C") wheels.