Why monitor the concrete temperature?

Monitoring the curing temperature of job site concrete in real-time helps ensure proper curing procedures are in place and the achievement of the design strength.  Project thermal control plans are important to the job and require monitoring to ensure this is achieved.  ACI 207 / ACI 116 (Mass Concrete) provides guidelines for extra thick (1 meter) concrete to prevent large temperature differential between the edge or surface and the middle, to prevent internal cracking. ACI 306R (Cold weather concrete) provides guidelines for the internal concrete curing temperature to be maintained within certain thresholds. The VAKKA sensor collects and stores the data continuously throughout the curing process and generates a report on the internal concrete temperature and strength development. 

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Why monitor the concrete relative humidity (RH)?

When concrete is initially placed, the relative humidity is 100% and can remain at 100%  in certain environments.  The concrete relative humidity is a critical measurement for proper adhesion of finishes to the surface of the concrete.  Monitoring the drying process can help ensure efficient scheduling of the floor covering process.  The VAKKA sensor continually monitors the RH and provides real-time information, as opposed to another single point-in-time testing. 

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How do I develop the concrete maturity index?

ASTM C1074 provides the procedure for making concrete cylinders.  The concrete cylinders are then tested at a certain interval.  The time and compressive strength can then be added into the free app, which will calculate the maturity index based upon either the Nurse-Saul or Arrhenius Method, automatically.  The maturity index can then be called up and used on projects in similar environmental conditions.

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What are the advantages of using the VAKKA sensor to monitor the concrete?

•Real time monitoring has been shown to result in faster and better decision making, speeding up the construction and saving monies in the process. 

•Problems that arise during the monitoring process can be identified sooner. 

•Better scheduling for upcoming work such as post-tensioning stressing or formwork removal

•Finishes to the surface of the concrete can be installed with confidence.

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Where can I get help if I have questions setting up the VAKKA sensor?

Questions can be sent to Support@hgcr-technology.com.  If available, a video conference call can be scheduled with a VAKKA specialist.