The ambient temperature has a strong influence on the kinetics and phase formation during the hydration of hydraulic binders. Therefore for the description of hydraulic reaction, the strict observance of exact temperatures is necessary.
For this reason a compact sample holder with a temperature range of -3°C - 80°C, especially suited for the demands of the hydration reaction investigations in cement chemistry, was developed.
To enable tempering direct at the sample, heating and cooling is done by a peltier element. The sample holder with about 80 mm in diameter and a height of 30 mm has only a weight of 150 g and is inserted in the XRD device like a normal sample holder.

• controlling unit in 19” plug in with RS 485 interfaces and power unit

• controller software MESICON MAETRE with temperature recording and power consumption recording

• watercooler

Performance of the system

Temperatur limits: -3 °C to 80 °C

Temperature control is not done by a commercial controller, but by computer interfaces and software. With this system it is possible to adapt the controlling algorithm exactly to the conditions of tempering by a peltier element. Inaccuracies have been minimized by using Pt 100 temperature sensors with an accuracy of 0.1 or 0.03 °C. The resolution of the temperature interface is 16 bit (0.003 °C). The controller allows controlling of the temperature with a deviation of +/- 0.02°C from the target temperature.

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