Based on 20 years experience with rheometers for mortar and fresh concrete, Schleibinger has developed a new instrument called viskomat XL. Its filling the gap between the viskomat NT for mortar and paste with a specimen volume of 360 ml and the concrete rheometer eBT-V with a sample volume of 20l. The operation principle of the viskomat XL is near the same as for the viskomat NT. So a mixer formed probe is measuring the torque, and the specimen vessel is rotating. An additional scraper is cleaning the wall of the vessel. Also a Vane probe for a max. grain size of 20 mm is available
The speed may be 0.0001 to 80 rpm in both directions, clockwise or counter clockwise. You may be define the speed in several steps, in an linear increase or decrease of speed. As option also an oscillating or shear stress controlled mode is possible.
The viskomat XL has a torque range from 0..1000 Ncm with a resolution of 0.05 Ncm and accuracy better then 0.2 Ncm.
Temperature control is realized by a double wall specimen container, where a cooling liquid is circulating. The specimen temperature is measured with a RTD mounted inside the shaft of the probe.
The sampling rate my be set from 0.005s .. 1min.
As option you may run the viskomat XL with a shear stress controlled mode. So you preset the torque over time, and the speed is automatically controlled to achieve the predefined torque.
The oscillation mode gives information about the storage modulus G' and the loss modulus G'' ,as well as the plastic and elastic properties of your material.
There are 4 different probes available: The Vane Probe for concrete, The Window Probe for mortar and paste up to 4mm aggregate size and the the Fishbone Probe for max. 8 mm and a set of 3 Sphere Probes (10..30 mm, not shown here)
The viskomat XL is controlled via a network interface . Simple connect your PC and start your Internet Explorer, Edge, Chrome or Firefox for full control and data transfer. No special software installation necessary.
Height 920mm, width 315 mm, depth 410mm, weight 68 kg.
Delivered with 3.5l vessel, inner diameter 165mm, inner depth 175mm, online Display with LCD screen, 4 USB-ports, incl. 1 meas. vessel, 1 fishbone probe for concrete (max. aggr. size 8 mm ) and 1 Vane probe with 6 wings (height 69 mm, diameter 69 mm) max. grain size > 16 mm, 1 scraper, user manual.
|Application:||Rheometer for mortar paste and fresh concrete up to 6..20 mm.|
|net. size (hxwxd)||920 x 315 x 410 mm|
|specimen Volume||3.5 l, 3 l usable inner diameter 165mm,
height 175 mm, others sizes on request
|motor speed range||0.0001..80 rpm / 1.6 10-5 .. 1.4 10-0 1/s in both directions|
|motor torque||max. 15 Nm|
|motor angle measurement accuracy||better ± 0.05 °|
|meas. torque range||±0..5000 (10000*) N mm|
|meas. torque resolution||0.05 N mm|
|meas. torque accuracy||better 5 Nmm, depending on the measurement range|
|temperature sensors||RTD PT100 1/10 DIN B|
|cooling and heating||double wall vessel connected to an external chiller|
|controller||extra box, 110..230V, 50..60Hz, 800W|
|controller interfaces||4 x USB, 2 x GBit network, HDMI, ext. SATA|
|user interface||Colored screen with online graphic, or external PC / tablett|
|server||WEB, FTP, SSH|
|safety||Special proximity sensor with automatic stop function.|
|viskomat XL, incl. software, electronic, mortar probe,
concrete probe, vane probe, scraper, vessel
|double wall vessel incl. valves for temperature control||VX0009|
|window probe for mortar and paste||VX0013|
|scraper for the viskomat XL||VX0021|
|shear stress controlled drive||VX0006|