Abstract
The paper analyses ways of increasing strength and durability of reinforced concrete matrices for explosive stamping. One of the means to increase the strength of the structure is a technological method of hardening concrete mixture processing. This technique is known as concrete hardening under pressure. The research reveals advantages and disadvantages of this method. It shows that the improvement of matrix characteristics is achieved through engineering changes. The authors describe their design of the matrix, to which they additionally install a compensation layer and a hydraulic chamber. The chamber allows creating pressure inside the structure not only at the moment of its manufacture, but also at any moment of its operation. The paper further describes the developed method of calculating ring-shaped reinforced concrete matrices with a compensation layer. It proposes equations of a matrix and its separate elements motion, necessary for other calculations. The results of calculation of the matrix and its developed structure are described. Graphs of matrix motion and graphs of relative deformations in time done in MathCAD complex are given.
Highlights
Usage of high-strength concrete class B60 and higher is gaining its popularity on the territory of the Russian Federation
A significant difference from analogues is the device in the design of the circular reinforced concrete matrix of the hydraulic tank in order to create pressure on the concrete at the time of hardening
In the course of the inventive activity, solutions were obtained for the reinforced concrete ring matrix for hydro explosion stamping with the addition of a compensation layer and a hydraulic tank
Summary
Usage of high-strength concrete class B60 and higher is gaining its popularity on the territory of the Russian Federation. Considering the normative documentation of the European Union (EN 206-1), which is in force since 2000, it is possible to find classes of concrete C100 / 115, which corresponds to the national class B100. As a result with the use of ordinary aggregates (as for concrete class B30), we obtain increased strength, reliable adhesion of concrete to the reinforcement and increased frost resistance. It allows solving the problem of lack of the necessary raw materials base of high-quality components
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