| Mains | V/Hz | 230V/1Ph/50Hz or 115V/60Hz (option) (110V is also available) |
| Power | kW | 1.0 |
| Outer Size | cm (wxdxh) | 70 x 83 x 215, 70 x 91 x 215 with Option C0108 |
| Inner Size | cm (wxdxh) | 53 x 65 x 155 |
| Vessel Size (Option C0108) | cm (wxdxh) | 50 x 60 x 48, volume approx. 144l |
| Minimum Temperature | °C | -35 |
| Maximum Temperature | °C | +40 |
| Max. number of shelfs | 24 | |
| Min. distance between 2 shelfs | mm | 55 |
| Max weight per shelf | kg | 60 |
| Shelf size | cm (w x d) | 53 x 65 |
| Weight | kg | 169 |
Concrete Slab Tester Features features a temperature and time-controlled refrigerating and heating system, with three fans for optimal air circulation. Both the inner and outer surfaces are made of stainless steel. It uses environmentally friendly refrigerant R290, which has minimal Global Warming Potential (GWP).
The chamber allows for freezing and thawing of specimens with 8 freely programmable temperature profiles. Standards such as EN 1340 and EN 12390-9, among others, are pre-set but can be modified. Two included temperature sensors can be placed freely within the cabinet, for example, on the specimen surface and at the bottom of the specimen.
A graphical touch display shows the set temperature, specimen temperature, air temperature, and the temperature at the cooling unit. All temperatures are internally recorded and can be copied to a USB memory stick. The chamber includes a network interface for remote control over your network. No extra software is necessary; simply open your internet browser and enter the address of the Slabtester.
You can program the temperature profiles on your PC, display all temperature data graphically in your browser, and import the data into Excel for local backup. Data is stored locally, with no external internet access required.
Included: 4 shelves, electronic controller, network cable, USB memory, and user manual.
Flooding Option: In the chamber, a removable stainless steel container with dimensions of approximately 50 x 60 x 48 cm (w x d x h) is mounted. A second container, placed outside, contains a pump and a heating unit. During freezing, the inner container remains empty. For thawing, tempered water is pumped from the outer container into the inner container, where it remains during the thawing period. After thawing, the water is drained back into the outer container. The timing for flooding and emptying is freely programmable. This feature makes the Slabtester suitable for testing natural stones according to EN 12371, aggregates according to EN 1367-1, tile glue according to EN 1348:2007, and other standards mentioned above.
Circulating Flooding Option: The Circulating Option is similar to the standard Flooding Option C0108, but with slightly larger outer and inner vessels. The inner vessel has an overflow and is filled from the bottom, draining through the overflow below the upper border. The pump runs continuously during the thawing period. After thawing, the pump stops, and the water drains from the inner vessel to the outer vessel. The inner vessel features a drawer mechanism for easy placement of specimens.
Option for Testing Freeze-Thaw Resistance of Clay Masonry Units according to EN 772-22:2018: This additional option includes automatic spraying of a specified amount of water at set intervals according to EN 772-22:2018. The intervals are freely programmable. Note that the maximum testing wall size, including the frame, is 58 x 58 cm. This option also requires the Natural Stone Option (C0108). An air pressure compressor (6 bar) is included.
Also available:
Option: Heat Flow Meter for Calibrating the Freeze-Thaw Test for Clay Masonry Units as described in EN 772-22:2018: The heat flow meter is an insulated device designed to extract heat over the central area of the surface that would be exposed during a test. The area is matte black and capable of extracting heat such that when the air temperature is at -15°C, the center of the plate is maintained at 0°C. The average rate of heat extraction can be measured.
Concrete Slab Tester for freezing in air and thawing in air or water. Complies with several European and international standards. Now with significantly increased cooling power. Suitable for testing not only concrete but also natural stones and tile adhesives. Includes optional internet connection and a flooding mechanism.
The test requires four specimens obtained from four cubes. After 21 days, a 50 mm thick specimen is sawed from each cube perpendicular to the top surface, ensuring the saw cut for the test surface is located in the center of the cube. The specimens are sized to 15 x 15 x 5 cm. After 25 days of concrete aging, a rubber sheet is glued on all surfaces except the test surface. After 28 days, demineralized water to a depth of 3 mm is placed on the test surface for 72 hours. After 31 days, all surfaces except the test surface are thermally insulated with 20 mm thick polystyrene foam plastic. The demineralized water is then replaced by the freezing medium, and the test surface is covered with a polyethylene sheet.
One freeze-thaw cycle is performed in 24 hours. The temperature must be above 0°C for at least 7 hours but not more than 9 hours during each cycle.
The reference temperature is measured in the center of the test surface and may vary between +/-2.5 K and +/- 5 K from the target temperature, as shown in the picture below.
After 7, 14, 28, 42, and 56 days, the weight of the scaled material is measured after the surface has been brushed.
The Slabtester is suitable for tests according to the following standards:
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