ISKRIT / Laboratory & metrology / Concrete strength · calibration
Laboratory & metrology
Concrete strength and rebound-hammer calibration online
The tool computes cube compressive strength and builds a test report per GOST 10180, fits a calibration curve for non-destructive testing per GOST 22690 (elastic rebound, impact impulse, pull-off with spalling, rib shearing, plastic deformation) and ultrasound per GOST 17624, and assesses the actual batch class per GOST 18105. Input the specimen failure loads, or pairs of indirect reading and strength; get the series strength, the report, the calibration chart, and a validated curve.
Standards
GOST 10180-2012: strength from control specimens, scale factors of table 4, series rule of clause 8.4. GOST 22690-2015: calibration curve per appendix E with outlier screening, correlation coefficient and residual standard deviation. GOST 17624-2012: ultrasonic method. GOST 18105-2018: actual batch class by coefficient of variation or scheme G.
Input
Cube edge, failure load, dates. For calibration, pairs of indirect reading and strength.
Output
Series strength, a GOST 10180 report, the calibration equation and chart, its applicable range, the actual batch class.
What it does
- Cube strength with the scale factor to the 150 mm base specimen
- Series strength per the GOST 10180 rule with defective specimens excluded
- Calibration for rebound, impact impulse, ultrasound, pull-off with spalling and rib shearing
- Outlier screening per condition E.6, validity check against correlation 0.7 and residual deviation 15 percent
Free and full version
Free
- Specimen strength and report per GOST 10180, actual batch class per GOST 18105
- Calibration and Kc binding per GOST 22690: rebound, impact impulse, ultrasound, pull-off with spalling
- Paste from Excel, calibration chart, export of the report and calibration to XLSX
- Up to 10 runs a day, no sign-up
Full version
- Test and batch journal: series accumulate, reports and history at hand
- Saved instrument calibration curves applied to new readings
- Batch acceptance per GOST 18105 with uniformity accumulated over the period
- Reports on the lab letterhead, integration with instrument tracking and company invoicing
Questions
Which standards does it use?
Specimen strength and the report per GOST 10180-2012, the calibration curve per GOST 22690-2015 (appendix E) and GOST 17624-2012 for ultrasound, the actual batch class per GOST 18105-2018.
Which non-destructive methods are supported?
Elastic rebound and impact impulse by rebound hammer, ultrasound, pull-off with spalling, rib shearing, plastic deformation. Pick a method and the column, chart and estimate labels follow the instrument indirect reading. A factory curve for a different concrete can be bound to your own with the coincidence coefficient Kc per appendix Ж.
How do I bring data from Excel?
Paste two columns, the indirect reading and the strength. The tool detects the columns and shows the parsed pairs as a table you can review and edit before fitting.
When is a calibration rejected?
If the correlation coefficient is below 0.7 or the residual deviation exceeds 15 percent of the mean strength, the curve is not allowed for strength assessment.