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Wpływ wilgotności betonu keramzytowego na jego wytrzymałość, odkszatałcalność i przewodność cieplną
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Abstrakty
The paper presents the results of own research on influence of moisture content in mature expanded clay aggregate concrete on some of its physical and mechanical properties. Six states of moisture content have been considered: dry state, state of full saturation with water under atmospheric pressure and four intermediate states. Investigations in intermediate states were carried out after removal of moisture gradients formed during drying process and bringing the moisture field in samples to homogeneous and uniform state. Distinct dependence of concrete properties on its moisture condition was proved. The character of these changes is non-linear, dependent on durability of water constraints with structure of concrete at a given moisture content of the material.
Przedstawiono wyniki badań własnych wpływu wilgotności dojrzałego betonu keramzytowego na niektóre jego cechy fizyko-mechaniczne. W badaniach uwzględniono sześć stanów wilgotności betonu: stan suchy, stan pełnego nasycenia wodą pod normalnym ciśnieniem atmosferycznym oraz cztery stany pośrednie. Badania w stanach pośrednich wykonano po likwidacji powstałych w procesie suszenia gradientów wilgoci i doprowadzeniu pola wilgotności w próbkach do jednorodnego i równomiernego. Wykazano wyraźną zależność właściwości betonu od jego wilgotności. Charakter tych zmian jest nieliniowy, uwarunkowany trwałością więzi wody ze strukturą betonu przy danej jego wilgotności.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
625--642
Opis fizyczny
Bibliogr. 25 poz., il.
Twórcy
autor
- Poznań University of Technology, Institute of Structural Engineering
Bibliografia
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- 3. Polish version EN 1990:2002 Eurocode: Basis of structural design, foreseen for enacting as PN-EN 1990:2004 [in Polish].
- 4. B. LEWICKI, Assuring the reliability of structures - values of partial safety coefficients for materials. Scientific commentary to PN-B-03264:2002: Concrete, steel and prestressed structures, Basic part, 1, [in Polish], ITB, Warszawa 2003, 9-26.
- 5. A. AJDUKJEWICZ, Concrete and environment - important aspect of balanced development [in Polish], Inżynieria i Budownictwo, 1, 22-25, 2002.
- 6. J. BOCUCKA, Moisture conditioning of properties of mature expanded clay aggregate concrete [in Polish], Rozprawy, 299, Poznań University of Technology editions, Poznań 1994, 133.
- 7. PN-EN 286- 12003, Concrete, Part 1: Specifications, properties, production and conformity [in Polish].
- 8. A. STRZAŁKOWSKI, A. ŚLlŻYŃSKI, Mathematical methods of data result handling [in Polish], PWN, Warszawa 1978.
- 9. S. Ł. ACHNAZAROWA,W. W. KAFAROW, Experiment optimisation in chemistry and chemical technology [in Polish], WTN, Warszawa 1982.
- 10. Z. N. CIŁOSANI, Usadka i połztuczest bietona, Mjecnijerjeba, Tbilisi 1979.
- 11. M. G. ELBAKIDZE, E. R. MJULMAN, l. R. ENUKASZWILl, Wlijanije wodonasyszczenija bietona na jewo procznost i deformatiwnost. Trudy Koordinacionnych Sowieszczani po Gidrotechnikje, 68, Energija, Leningrad 1971, 97-102.
- 12. S. E. PIHLAJAVAARA, A review of some of the main results of a research on the ageing phenomena of concrete. Effect of moisture conditions on strength, shrinkage and creep of mature concrete, Cement and Concrete Research, 4, 5, 761-771, 1974.
- 13. N. N. NIEDIELJA, Wlijanije włażnosti bietona na jewo procznost, Bieton i Żelezobieton, 3, 38-39, 1983.
- 14. N. N. SKOBLlNSKAJA, O miechanizmje diejstwija wody na procznost cementnowo kamnia, w kn. Strukturoobrazowanije bietona i fiziko-chimiczeskije mietody jewo issledowanija, NlIŻB GOSSTROJA SSSR, Moskwa 1980, 103-115.
- 15. P. J. SEREDA, R. F. FELDMAN, E. G. SWENSON, Effect of sorbed water on some mechanical properties of hydrated portland cement pastes and compacts, Highway Research Board, Special Raport, 90, 58-73, 1966.
- 16. R. F. FELDMAN, Volume change, porosity and helium flow studies of hydrated portland cement, Proceedings, RILEM/IUPAC 1973 International Symposium on Pore Structure and Properties of Materials, Prague 1973, 101-116.
- 17. R. F. FELDMAN, P. J. SEREDA, A model for hydrated portland cement paste as deduced from sorption- length change and mechanical properties, Materiaux et Constructions, 1, 6, 509-520, 1968.
- 18. J. BOCUCKA (WIATRAK), Influence of moisture content on deformability of lightweight aggregate concrete, PhD Thesis [in Polish], Poznań 1970.
- 19. J. BOGUCKA (WIATRAK), Deformability of light-weight structural concrete in various moisture states [in Polish], Archiwum Inżynierii Lądowej, 18, 2 ,277-285, 1972.
- 20. J. I. MESZKAUSKAS, Konstruktiwnyj keramzytobieton, Strojizdat, Moskwa 1977.
- 21. F. H. WITTMANN, Interaction of hardened cement paste and water, Journal of the American Ceramic Society, 56, 8, 409-415, 1973.
- 22. J. S. Guo, P. WALDRON, An elastic model to quantify the effect of moisture on the mechanical properties of concrete at the time of test, Magazine of Concrete Research, 53, 3, 151-162, 2001.
- 23. J. BOGUCKA, Application of nuclear magnetic resonance method in investigation of water state in expanded clay aggregate concrete [in Polish], Archives of Civil Engineering, 34, 3, 387-399, 1988.
- 24. J. BOGUCKA, Moisture modification of compressive strength in expanded clay aggregate concrete [in Polish], XXIX Scientific Conference of Civil Engineering Committee, Polish Academy of Science and Science Committee of Polish Association of Civil Engineers and Technicians, 3, Poznań-Krynica, 1983, 17-22.
- 25. S. E. PIHLAJAVAARA, Some results of the effect of carbonation on the porosity and pore size distribution of cement poste, Materiaux et Constructions, 1, 6, 521-52, 1968.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BTB2-0022-0032