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 20 l. 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..10000 Nmm with a resolution of 0.05 Nmm and accuracy better then 0.02 Nm.
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 (from the left):
Liu, Y.; Jing, R.; Yan, P. Comparative Study of Different Measurement Methods for Characterizing Rheological Properties of Lubrication Layer.
Molecules 2021, 26, 3889.https://doi.org/10.3390/molecules2613388
Paul, Suvash & Wei, Yi & Tay, Yi Wei Daniel & Panda, Biranchi & Tan, M.J.. (2017). Fresh and hardened properties of 3D printable cementitious materials for building and construction. Archives of Civil and Mechanical Engineering. 18. 10.1016/j.acme.2017.02.008.
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 920 mm, width 315 mm, depth 410 mm, weight 68 kg.
Delivered with 3.5l vessel, inner diameter 165 mm, inner depth 175 mm, 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 ranges||±0..3000 Nmm and ±0...10000 Nmm|
|meas. torque resolution||0.05 N mm|
|meas. torque accuracy||better 20 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, max. 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, fishbone probe, vane probe (w/o cage VX0005),
scraper, vessel, monitor, mouse, keyboard, user manual
|Anti wall slippage cage or basket as inlet for the standard vessel||VX0005|
|Vane probe with 6 blades (already incl. in VX0001)||VX0004|
|Concrete probe, also called fishbone probe (already included in VX0001)||VX0011|
|Double wall vessel incl. valves for temperature control||VX0009|
|Window probe for mortar and paste||VX0013|
|Sphere probe set (10mm, 20mm 30mm diameter). Stainles steel incl 3 supports.||VX0007|
|Scraper for the viskomat XL||VX0021|
|Shear stress controlled drive||VX0006|
|Oscillation mode (requires VX0006)||VX0030|
Technical data may be changed without notice