| Summary: | The results of experimental studies of the strength and deformative properties of concretes with the addition of superplasticizer S-3 and without additives, of various compositions under dynamic loads, the rate of application of dynamic action averaged 700 MPa/sec are presented. The coefficient of dynamic strengthening of concrete is determined as the ratio of prismatic strength under static and dynamic loads for the studied concretes with and without the addition of S-3, the value of which varies from 1.14 to 1.28, the significant effect of the additive was not detected. Graphs of the dependence of the ratios of elastic modulus and ultimate deformations on the loading rate and the deformation rate are presented. According to the main deformative characteristics under dynamic loading, the studied concretes with and without additives differ little from each other.
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