Mechanical properties of cement paste curing at different isothermal conditions

The paper studies the intensity of strength generation in the concrete paste during the time period of 0.67 hours, at 40, 50 and 70 degrees C. isothermal curing. It is shown that at these temperatures the yield stress increases by one order of magnitude. The elastic properties of the cement paste also significantly increase. The plastic strain range reduces with curing time, and the catastrophic failure of specimens occurs at the end of the investigated temperature range. Stress-strained curves in the plastic range are non-monotonous, with a high density of breaks. The yield stress is the main parameter for evaluating the strength properties of the cement paste.