Mechanical properties, strength and ductility

The influence of heat treatment on the dynamic strength characteristics of cement mortars

L. A. Igusheva^a, Yu. V. Petrov<sup>ab

a</sup> Saint Petersburg State University, St. Petersburg, Russia
^b Institute of Problems of Mechanical Engineering, Russian Academy of Sciences, St. Petersburg, Russia

Abstract: The dynamic fracture of pre-heat-treated cement mortars was analyzed from the point of view of a structural-temporal approach based on the incubation time concept. The rate dependences of fracture toughness and compressive strength of standard cement mortar and mortar with an admixture of barium sulfate were constructed, taking into account the heat treatment influence. Based on known experimental data, the values of incubation times were estimated. According to the theoretical calculation, the compressive strength inversion effect and the fracture toughness inversion effect were shown.

Keywords: mortar, incubation time, dynamic fracture toughness, dynamic compressive strength, heat treatment.

Received: 07.02.2024
Revised: 07.02.2024
Accepted: 15.02.2024

DOI: 10.61011/FTT.2024.03.57491.21

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