| Abstract: | Conclusions
| 1. |
The concrete of the Vilyui III hydrostation is characterized by a strength exceeding the grade and a high modulus of elasticity,
and for the structural members of the main structures by a long stay during construction at low temperatures —to minus 15–35°C.
|
| 2. |
The strength and deformation characteristics determined by tests of specimens and cores from mature concrete (up to 4.6 years)
of grades M250 W8 F100, M300 W10 F100, and M400 W12 F400 were: cube Rcub and prism Rpr strengths, respectively, 40–57 and 20–45 MPa; initial modulus of elasticity Ec=(4–4.3)·104 MPa and Poisson's ratiov=0.127; for M250 and M300 Rpr/Rcub=0.65 and for M400, 0.8.
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| 3. |
The initial modulus of elasticity of the on-site concrete M250 at an age of 400–500 days at positive temperatures was Ec=4.6·104 MPa. Freezing of concrete to minus 30°C leads to an increase of Ec by 1.6 times according to a linear dependence. An increase of Ec practically ceases in the minus 30–38°C temperature range.
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| 4. |
The strength and deformation characteristics of the concrete obtained as a result of tests, which considerably exceed the
standard values and those adopted in the design, can be used for analyzing the state of the main structures of the Vilyui
III hydrostation during the construction and operation periods and when processing the results of observations by means of
the installed monitoring and measuring instruments.
|
Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 7, pp. 11–14, July, 1998. |
