Thermal Linear Expansion of RubCon

Heating of a RubCon sample was done with speed not exceeding 1.5° 0.5°C per minute in a range. 

FIGURE 2.12 Test unit for determination of coefficient linear expansion of RubCon (1) temperature chamber, (2) RubCon sample, (3, 4) steel plates, (5) pile, (6) indicator, (7) leg of indicator, (8) thermometer. (Reprinted from Yu. Potapov, O. Figovsky, Yu. Borisov, S. Pinaev, and D. Beilin, Joint Work of Reinforcement and Polymer Concrete Matrix, J. Scientific Israel Technological Advantages 4, nos. 3-4 (2002) 14-19. With permission.) 

Measurements of the elongation of test samples of the size 40 x 40 x 160 mm during heating were carried out in a thermostatic mode. The average coefficient of linear thermal expansion a was calculated with the following formula  

As a result of this research it is established that for RubCon samples, 

We shall note that the coefficient of linear expansion of steel is a = 1.2 a 1.3 10 5 (H°C) at the same temperature range. Thus, in RubCon-reinforced building structures, there will be no additional internal temperature stresses in all ranges of operational temperature. 

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