Laying stone with concrete in the interior zone of the Ust-Ilim dam
- 20 Downloads
When 8–13% of oversize stones are laid in a concrete block, the difference between the temperatures of the concrete mix and the stone being 4–6°C, the maximum temperatures for exothermal heating of the concrete fall by 2–6°C.
Laying of stones at −14°C in concrete mix at 6–7°C does not lead to freezing of the concrete mix at the stone-mix contact provided that the concreting is performed under a heated canvas shelter.
When 8–13% of stone is laid in the block and when the temperature difference between the concrete mix and the stone is 4–21°C, during the stage of exothermic heating the concrete around the stone is compressed. There is a tendency for the compressive deformations to decrease as the stone content of the concrete increases.
During cooling of stone-concrete blocks, the stress state of the concrete surrounding a stone is mainly governed by the overall thermal stress state of the blocks.
Field investigations of the temperatures and thermal stress states of stone-concrete masonry show that it is possible and advantageous to lay oversize stones (even if their temperatures are 15–20°C below the temperature of the concrete mix) in the interior concrete of a dam.
KeywordsStress State Energy Source Temperature Difference Thermal Stress Power Generation
Unable to display preview. Download preview PDF.
- 1.A. K. Shreiber and M. I. Milyukovskii, “Possibility of using stone-concrete in shore-protection structures,” Gidrotekh. Stroitel'., No. 10 (1971).Google Scholar
- 2.A. N. Adamovich and M. S. Lamkin, “Observation of concrete cracking in the Bratsk hydroelectric station dam by drilling special boreholes,” Proceedings of Coordination Conference on Hydrotechnics [in Russian], No. IV, Gosénergoizdat, Moscow (1962).Google Scholar
- 3.G. D. Tsiskreli and A. N. Dzhavakhidze, “The effect of aggregate size on strength and deformation of concrete,” Gidrotekh. Stroitel'., No. 5 (1970).Google Scholar