A LASER Beam Measurement of early Shrinkage and Expansion of Building Materials: contact-less and with high resolution!

Shrinkage ConeWith Schleibingers patented innovation the Schleibinger Shrinkage Cone it is possible to measure the shrinkage or expansion of fluid building materials in the first minutes and hours after addition of water. The expansion of the building material is registered contact-less and very accurate by a laser beam.

To ensure the measured distance correlates with the relative length change of the material a special formed double wall sample container is used. The design of the sample container allows a connection with an external temperature control unit for heating or cooling the sample during the measurement.

The length change is registered with a resolution of < 2 mikron. The measurement values are digitized and stored by the software delivered with the system. In addition, simultaneous recording of the measurement of the temperature and humidity of the environment and the temperature and the weight change of the sampe are possible.


Measurement Procedure


 shrinkage cone measurement principle

For an angle of 60° the Volume V = 1/9 * pi * h³ . With h = 100mm V = 349 cm3


Example Measurement

The following graphic shows measurement results of the cement pastes with different cement fineness:

example measurement shrinkage cone



Technical Data

Measurement Range 10 mm
Basic distance 25 mm
Reproducibility better 0.5 µm
Linearity better ±8 µm
Resolution better 2 µm
Volume / height sample container for mortar or paste ca. 349 cm³ / 100 mm
Volume / height sample container for concrete ca. 682 cm³ / 125 mm
Laser Power < 1 mW at 670 nm Class 2 according to DIN EN 60825-1:2008-05 and IEC 60825-1:2015

Changes are reserved for technical progress. DBPa registered.


 Scope of Delivery for Order Code S0050






User Manual