NLK apparatus according to EN 459-2

Variants

The reactivity of fine lime during slaking is tested by measuring the temperature increase that occurs during its reaction with water as a function of the reaction time. This process is called NLK (wet erasure curve). The equipment and measuring method are based on EN 459-2.

For the reaction process, 150 +/- 0.5 g of undissolved lime is added to the Dewar vessel, which contains 600 +/- 1 g of distilled water at approx. 20° C. As the contents of the Dewar flask must be completely mixed throughout the entire duration of the experiment, this apparatus is equipped with an agitator (speed 350 +/- 1/min).

During the reaction, the heat energy released heats the water. The temperature increase is recorded by a high-quality temperature sensor and can optionally be transferred to software for evaluation.

If you have any questions or would like a quote, please contact us: info@kgw-isotherm.de

The company Metalogie GmbH from Goslar has developed the nlk3 software solution for recording, storing and mathematically evaluating the measured values to match our NLK equipment.

• Standard-compliant recording and evaluation in accordance with DIN EN 459-2 using the characteristic values T0, tmax, Tmax, T’max, tu80, Tu80, t60
• Display of further characteristic values such as ΔT5, T10, t40, reaction enthalpy (heat tint), R-value, conversion rate maximum, etc.
• Evaluation of the final reaction rate (FR value) incl. graphical representation
• Measured value recording with 2, 4 or 8 temperature sensors (depending on version)
• Free configuration of the determination values
• Comprehensive management of measurements and samples
• Print preview with numerous export formats
• Test equipment management for the measuring devices and Dewar vessels
• Integrated device driver for Testo 735 measuring instrument (via USB); other drivers on request
• Calibration of the sensors via two points
• Testing the heat loss (water value) of the Dewar vessels
• File-based CSV interfaces for transferring (importing) existing raw data and for forwarding (exporting) intermediate and final results
• Generation of measurement logs/reports at the touch of a button
• Export of intermediate and final results via defined interfaces or CSV files
• Prepared for the US standard ASTM C 110

You can find detailed information about this solution on the Internet at www.nasslöschkurve.de/messen-auswerten.

If you are interested in nlk3, please contact us directly:

Metalogie GmbH
Im Schleeke 50, 38642 Goslar
Tel. 05321-57320
info@metalogie.de