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  2. Schmidt hammer - Wikipedia

    en.wikipedia.org/wiki/Schmidt_hammer

    Testing the compressive strength of a concrete cube using Schmidt hammer Cross section. The hammer measures the rebound of a spring-loaded mass impacting against the surface of a sample. The test hammer hits the concrete at a defined energy. Its rebound is dependent on the hardness of the concrete and is measured by the test equipment.

  3. 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.

  4. Ready-mix concrete - Wikipedia

    en.wikipedia.org/wiki/Ready-mix_concrete

    Concrete has a limited lifespan between batching / mixing and curing. This means that ready-mixed concrete should be placed within 30 to 45 minutes of the batching process to hold slump and mix design specifications in the US, [15] though in the UK, environmental and material factors, plus in-transit mixing, allow for up two hours to elapse. [16]

  5. Template:Runcic cube table - Wikipedia

    en.wikipedia.org/wiki/Template:Runcic_cube_table

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  6. Compressive strength - Wikipedia

    en.wikipedia.org/wiki/Compressive_strength

    The characteristic strength is defined as the strength of the concrete below which not more than 5% of the test results are expected to fall. [ 16 ] For design purposes, this compressive strength value is restricted by dividing with a factor of safety, whose value depends on the design philosophy used.

  7. Mexico seeks Trump agreement to avoid receiving non-Mexican ...

    www.aol.com/news/mexico-does-not-want-us...

    MEXICO CITY (Reuters) -Mexico is seeking an agreement with U.S. President-elect Donald Trump to ensure Mexico does not receive deportees from third countries in case of large-scale deportations ...

  8. The report also found that the average vacation budget had reached $5,051, and people planned to take over four trips per person. Explore More: 5 Google Flights Tricks To Help You Land the ...

  9. Electrical resistivity measurement of concrete - Wikipedia

    en.wikipedia.org/wiki/Electrical_resistivity...

    Standard Test Method for Electrical Indication of Concrete's Ability to Resist Chloride Ion Penetration. ASTM Standard C1202-10. Standard Test Method for Surface Resistivity of Concrete's Ability to Resist Chloride Ion Penetration. Washington, D.C., USA: American Association of State Highway and Transportation Officials. 2011. AASHTO TP 95.