Device and method for determining rheological properties of concrete

The present invention concerns a portable hand-held device (10) for determining rheological properties of concrete comprising a handle (11) for manually operating the device, a paddle (12) non-rotatably attached to said handle (11), sensor means (14) for determining a force acting on said paddle (12), an electronic module (17) for evaluating data collected by said sensor means (14), and an electrical power source for supplying electrical energy to said sensor means and said electronic module. The invention also concerns a method for determining rheological properties of concrete using such a portable, hand-held device comprising the steps of completely immersing said paddle (12) of said device into concrete;manually moving said paddle (12) along a linear path through the concrete for a predetermined distance;measuring a force acting on said paddle (12) during its movement through the concrete and collecting said force data; evaluating said measured force data and displaying the evaluated results.