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  1. HectorB

    Slump reduction with time

    First, the ACI states that the sample should be taken between 15% and 85% of the discharge of the total load. The ASTM standard states "In any case do not obtain samples from the very first or last portions of the batch discharge."
  2. HectorB

    Lightweight Particles Test Frequency

    I work in a crushed plant, and we run this test every week.
  3. HectorB

    Swiss Hammer

    I have a Swiss Hammer (and the Anvil, too), but It's not calibrated. Actually, it reads 80.23 when the right reading should be 84. How do I do the correction to accurate reanding?
  4. HectorB

    Concrete test record software

    I have a Rebound Hammer (Swiss Hammer) and It's not calibrated. In the verification in Anvil, it should read 84, and it read 80.23 (average). How do I do the correction to accurate reading?
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