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Concrete Paving Quality Control Procedures: Concrete Slump Mobile App

The standard slump test should be considered as a pseudomeasure of workability. It does not necessarily reflect workability properties that correlate to the ability to place concrete with a slipform paver. However, slump can be used as an indicator of between-batch variability (uniformity). Changes in slump indicate variability in the materials and/or the batching process. Thus, slump is a process control test procedure and should not be considered as an acceptance criteria. Slump can also be used as an indicator of early stiffening. Performing slump tests at 5 minutes and 20 minutes after batching is a practice that is encouraged. Monitoring the slump loss over time can identify early stiffening issues associated with material changes, incompatibilities, or changes in the concrete temperature. The Concrete Paving Quality Control Procedures: Concrete Slump mobile app cover: Purpose, Principle, Test Procedure, Test Method, Output and Construction Issues. GoCanvas supports signature capture.

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Take a peek inside the Concrete Paving Quality Control Procedures: Concrete Slump Mobile App

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Included Fields

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    The standard slump test should be considered as a pseudomeasure of workability.

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    Water content, combined gradation, cementitious chemistry, mixing time, air content, and concrete...

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    ASTM C 143, the Standard Test Method for Slump of Hydraulic-Cement Concrete, determines how much ...

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    Slump mold.

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    Tamping rod.

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    Flat and nonabsorbent base.

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    Test Method – Refer to ASTM C 143 for Comprehensive Guidance

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    The following steps summarize the sampling and testing procedures for concrete produced at a cent...

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    Sample concrete at the central mix plant.

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    Perform the first slump test 5 minutes after the concrete batch is discharged from the mixing drum.

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    Measure and record the following for each test:

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    Sample concrete at the placement location and test.

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    Measure and record the following for each test:

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    Concrete temperature.

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    Ambient temperature.

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    Time.

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    Slump.

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    Graph the test results

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    Graphing the slump test data as shown in Figure 7.

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    Construction Issues – What Should I Look For?

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    Test results that vary by more than 2 in.

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    Aggregate moisture(s).

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    Stockpile segregation.

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    Mixing time.

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    Air content.

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    Concrete temperature

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    Material incompatibilities.

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    Batching proportions and/or scale tolerances.

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