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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Power technology and engineering 12 (1978), S. 20-22 
    ISSN: 1570-1468
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Conclusions 1. Of the 1652 cracks found in the Ust-Ilim dam concrete, 12–13% were through and deep. 2. An increase in the planar dimensions of the blocks along the axis of the dam to 22 m without correction of the requirements imposed on their thermal regime promote an increase in the rate of cracking. All percolating cracks were found in joined blocks. 3. To reduce the rate of cracking the requirements imposed on providing the thermal regime of the concrete masses must be coordinated with the construction work at individual stages of construction.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Power technology and engineering 12 (1978), S. 240-243 
    ISSN: 1570-1468
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Conclusions 1. A change in seepage flows through cracks depends on the temperature of the concrete in the upstream face of the dam and on a change of the UP level. The maximum occurs in February-March and the minimum in September–October. 2. A change in seepage through the intersectional joints is related mainly to a change of the UP level. 3. The total seepage through the cracks was 20 liters/sec in February 1976 and 7 liters/ sec in February 1977, i.e., it decreased by almost 2.5 times. Grouting the cracks in the spring of 1976 was the main cause of the reduction. 4. Physical leaching of lime occurred in all investigated cracks in 1976.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Power technology and engineering 8 (1974), S. 198-202 
    ISSN: 1570-1468
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Conclusions 1. 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. 2. 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. 3. 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. 4. 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. 5. 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.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Power technology and engineering 12 (1978), S. 553-558 
    ISSN: 1570-1468
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Power technology and engineering 7 (1973), S. 1-4 
    ISSN: 1570-1468
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Conclusions 1. Dry grading of sand-gravel mixes during the winter, in combination with special hydraulic stockpiling, is an effective procedure for construction in the northern regions. 2. The quality of the concrete prepared during the winter, with temperatures of the coarse fraction as low as −10°C, is not inferior to the quality of the concrete prepared during the summer. 3. Thermal resistance of the “warm” formwork of 1.5 (m·h·°C)/kcal is sufficient to ensure crack resistance os structures concreted during the winter. For blocks measuring 11×12m, concreted during the summer, it is possible to use “cold” forms to provide additional cooling of the concrete down to temperatures of 10–15°C, before the approach of the winter. 4. To reduce the labor costs involved in the concreting work during the winter, it is necessary to improve and unify the formwork and tent elements.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1570-1468
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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