FIELD: physics.
SUBSTANCE: in the method of evaluating cement activity in water-cement systems, cement is mixed with water, obtaining cement dough which is then put into a mould. For 60-70 seconds change of temperature of the cement dough is measured using at least one temperature sensor from the beginning of mixing to the onset of cement setting. Histograms are drawn for distribution of the obtained values of periods versus the values and cement activity is determined by comparing the obtained histograms with standard histograms. A fibre optic or resistance thermometre is used, preferably with sensitivity less than 0.05°K. A plasticiser can be added when preparing the water-cement mixture.
EFFECT: more accurate and faster method with simplification of its implementation.
4 cl, 4 ex, 1 dwg
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