HPC-09 COQAT
Concrete Quality Assessment Tool - HPC-09 COQAT
See the COQAT Video.
HPC-09 COQAT calculates both Curing Quality and the W/C (water / cement) Ratio in Real Time!
Note: HPC-09 COQAT calculates the W/C Ratio Experienced by the Concrete under the Bed Covering, while standard Lab Calculations Calculates the Initial W/C Ratio for the Mix delivered to the Beds.
W/C Ratio calculation is experimental, but months of testing has shown that the HPC-09-COQAT calculated W/C with perfect Bed Covering, is in good correspondence with manually calculated W/C in a Lab! The figures can often correspond within the 3 decimal after the comma (.).
The W/C Ratio Experienced by the Concrete will always be somewhat lower than the Initial W/C Ratio: Even with good Bed Covering, water evaporates and the concrete looses some water especially at the surface!
HPC-09-COQAT is Integrated into HPC-09 v8 and also provided as a Free Standalone Tool that can import Raw Report Data from HPC-09 v8.
Graphs can be Annotated and Comments can be attached to each Graph. When
Data is imported into HPC-09-COQAT it automatically calculates a Curing Quality and the W/C Ratio from the Data!
A collection of Graphs can be organized into a Project with project notes and saved to disk. The Project file (.hpc09G) can be sent to other Colleagues:
You can all look at the same data and discuss over e.g. the phone to solve any problems.
When Data is imported into HPC-09-COQAT it automatically calculates a Curing Quality and the W/C Ratio from the Data!
Curing Quality is also calculated by giving a "Penalty" for 5 areas during the curing::
- Bc: Early Phase Bed Covering
- Do: Dormant Phase
- Ac: Acceleration Phase
- Di: Curing Discrepancies
- Co: Bed Covering Consistency
Each of the Bc, Do, Ac, Di and Co numbers adds to subtract from 100% Curing Quality.
Any number above ~80% is very good. Lower then ~70% one should investigate the reasons.
Is this number "Correct"? It is at least much better than the human notion "This curing was better than the previous, or yesterday's curing..."
In the example below (real data!), the Bed Covering was removed from the concrete for 2 Hours causing the very low curing quality.
Read the Graph Comment for the "Measured Relative Humidity" Graph in the COQAT Tool,
See our LinkedIn Post regarding HPC-09-COQAT at this link.