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Concrete Paving Quality Control Procedures: Heat Signature (Adiabatic Calorimetry Test) Mobile App

Does your line of concrete pavement work involve calorimetry? Heat signature is a representation of the heat of hydration generated by a specific concrete mixture over time. Variations in the chemistry and dosage of Portland cement and supplementary cementitious materials (SCMs), along with interactions between them and chemical admixtures, may be flagged by the heat signature. Changes in the heat signature of a concrete mixture can impact construction issues related to strength development and proper saw timing. The Concrete Paving Quality Control Procedures: Heat Signature (Adiabatic Calorimetry Test) mobile app covers: Purpose, Principle, Test Procedure, Test Method, Output and Construction Issues.

You can modify the app to include additional fields pertaining to heat and calorimetry tests, such as: reactions, initial temperature, temperature changes, specific heat, heat transfer, chemical reactions and more. With this app, you can record as much information as you find necessary in little to no time. Make your calorimetry work easier and reduce time spent on documentation.

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

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Take a peek inside the Concrete Paving Quality Control Procedures: Heat Signature (Adiabatic Calorimetry Test) Mobile App

Included Features

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Included Fields

Customize to add, remove, or edit any of the fields below.

  • Ico statictext

    Heat signature is a representation of the heat of hydration generated by a specific concrete mixt...

  • Ico statictext

    Chemical reactions that occur as concrete hardens emit heat (heat of hydration).

  • Ico statictext

    ΔT = Tn – T0

  • Ico statictext

    Tn = Temperature of the concrete sample at time n (after the initial temperature reading)

  • Ico statictext

    T0 = Initial concrete temperature at the beginning of the test

  • Ico statictext

    A concrete cylinder(s) is placed inside an insulated container that is equipped with temperature ...

  • Ico checkbox

    Calorimeter: insulated container equipped with temperature sensors

  • Ico checkbox

    Standard concrete cylinder(s).

  • Ico checkbox

    Personal computer.

  • Ico checkbox

    Prepare the test apparatus for use—program the temperature sensor(s) to measure and record temper...

  • Ico checkbox

    Sample the mixed concrete and cast the concrete cylinder(s).

  • Ico checkbox

    Insert the temperature sensor into the cylinder(s) and record the time when it is inserted into t...

  • Ico checkbox

    Place the concrete cylinder(s) in the insulated container and close the container.

  • Ico checkbox

    Maintain the temperature of the environment where the insulated container is located at 73˚F ± 3˚F.

  • Ico checkbox

    Open the container at the conclusion of the test and download the temperature data from the sensor.

  • Ico checkbox

    Graph the temperature data with time on the x-axis and ΔT on the y-axis

  • Ico checkbox

    Record and note the following values on the heat signature graph

  • Ico checkbox

    Maximum temperature (Tmax).

  • Ico checkbox

    Minimum elapsed time at which Tmax occurs.

  • Ico checkbox

    Maximum slope between two individual temperature measurements (Smax, ˚/h).

  • Ico checkbox

    Minimum elapsed time at which Smax occurs.

  • Ico checkbox

    Average slope from the minimum temperature to the maximum temperature (Savg, ˚/h).

  • Ico statictext

    The current practice for interpreting heat signature results is empirical—the curves should be vi...

  • Ico checkbox

    Random cracks occurred with this mixture due to slow strength development.

  • Ico checkbox

    Random cracks occurred with this mixture due to rapid strength development.

  • Ico checkbox

    Workability issues due to early stiffening.

  • Ico checkbox

    Workability issues related to hot weather or elevated concrete temperature (>85˚F).

  • Ico checkbox

    If the fi eld performance of a mixture was good, note the range of concrete temperatures that the...

  • ...and More!

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