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Concrete Manual: Project Calibration of Concrete Mobile Mobile App

The Concrete Manual: Project Calibration of Concrete Mobile app procedure is applicable to mechanical and all-hydraulic Concrete Mobiles. It also applies to the Magnum Concrete Mobile with certain exceptions. Calibrations are based on 45 kg (100 lb.) quantities. These values are not exactly equal but these quantities are used for convenience. Exceptions are identified where they occur. Each Concrete Mobile Model has a unique number of revolutions and length of time to deliver 45 kg (100 lb.) of cement for state work.

  • Lendlease
  • The Cooperative
  • PG&E
  • Red Bull
  • Mirvac

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    This calibration procedure is applicable to mechanical and all-hydraulic Concrete Mobiles.

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    A.

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    The list of items required by the Contractor are:

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    A scale with a capacity of 225 kg (500 lb.

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    A box or other container to catch the discharged material on the scaleA box or other container to...

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    A suitable deflector (sheet metal, etc.

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    Project personnel verify the cement output.

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    1. Check to see that the aggregate bins and the main conveyor belts are empty and clean

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    Clean and free-up cement deposits from the cement meter feeder.

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    Check the spring hammers and the cement meter register for proper operation.

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    Check all bin vibrators for operation (two for cement bin, two for sand bin).

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    Ensure that the cement bin aeration system is operating properly and that the air breather hole ...

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    Ensure that the cement bin aeration system is operating properly and that the air breather hole ...

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    Ensure the Concrete Mobile is properly grounded.

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    Place the mix-conveyor in the travel position and fix the piece of sheet metal into the bottom e...

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    With the cement meter register engaged, run out sufficient cement for charging the belt and ensu...

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    Zero the meter, place the box or other container on the scale, and position so all the discharge...

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    Engage the main conveyor and allow the equipment to run until the meter register reaches 45 kg (...

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    Engage the main conveyor and allow the equipment to run until the meter register reaches 3 times...

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    Stop the main conveyor.

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    If the net mass (weight) does not fall between 135 and 138 kg (300 and 306 lb.

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    If the meter count does not fall within 135 and 138 kg (300 and 306 lb.

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    Example:

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    Original meter count = 70 revolutions

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    Original cement weight = 46 kg (102 lb.

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    Original time constant = 30 seconds

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    Average mass (weight) for 3 times the number of revolutions = 150 kg (331 lb.

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