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Cavitation destruction of concrete and protective facings under natural conditions
Conclusions At flow velocities greater than 15–18 m/sec cavitation occurs at a number of places on hydraulic structures, which causes intense erosion of concrete. Therefore, when designing structures it is desirable to eliminate conditions giving rise to cavitation.Experience gained in the use of protective steel facings and polymer coatings shows that under cavitation conditions the anchors are quickly torn away and the adherence of the facing (coating) to the concrete is disrupted, which leads to partial or complete separation of the facing (coating) and development of cavitation erosion of the concrete.To increase the cavitation resistance of hydraulic concrete it is necessary not only to search for effective methods of protecting it by means of facings (coatings) and to perfect methods of their attachment on the concrete base, but also to study the possibility of increasing the resistance of the concrete itself under cavitation conditions. These investigations should determine under what conditions and in what elements of the structure the concrete can successfully and for a long time withstand cavitation and what requirements should be taken into account for increasing its cavitation resistance.
Cavitation destruction of concrete and protective facings under natural conditions
Conclusions At flow velocities greater than 15–18 m/sec cavitation occurs at a number of places on hydraulic structures, which causes intense erosion of concrete. Therefore, when designing structures it is desirable to eliminate conditions giving rise to cavitation.Experience gained in the use of protective steel facings and polymer coatings shows that under cavitation conditions the anchors are quickly torn away and the adherence of the facing (coating) to the concrete is disrupted, which leads to partial or complete separation of the facing (coating) and development of cavitation erosion of the concrete.To increase the cavitation resistance of hydraulic concrete it is necessary not only to search for effective methods of protecting it by means of facings (coatings) and to perfect methods of their attachment on the concrete base, but also to study the possibility of increasing the resistance of the concrete itself under cavitation conditions. These investigations should determine under what conditions and in what elements of the structure the concrete can successfully and for a long time withstand cavitation and what requirements should be taken into account for increasing its cavitation resistance.
Cavitation destruction of concrete and protective facings under natural conditions
Inozemtsev, Yu. P. (author)
1969
Article (Journal)
English
BKL:
56.30
Wasserbau
Local classification TIB:
770/6550/8000
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