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| Avtorstvo: |
Jana ŠELIH // 1.01 Izvirni znanstveni članek
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| Leto: |
1996 |
| Citat: |
ŠELIH, Jana, BREMNER, Theodor W. Drying of saturated lightweight concrete:
an experimental investigation. Matér. Constr., Aug/Sept 1996, vol. 29,
no 191, str. 401-405. |
| Povzetek: |
The changes of moisture content during
drying are experimentally investigated in the present work. Particular
emphasis is placed on the initial stage of drying of saturated concrete,
when moisture contents are high, since the resistance of the material to
several deterioration processes is reduced at high moisture content levels,
and experimental data for this stage of drying is lacking. The experimental
investigation is performed for concrete cylinders of different lengths with
one end exposed to drying. In this way, moisture flow is forced to be
unidirectional. The gravimetric method is employed to obtain moisture
content distribution in the material at different times of drying. The
cylinders are made of lightweight concrete with varying water-to-cement
ratios and moist curing times, and the influence of these variables upon the
drying process is assessed. Higher initial water content and more rapid
changes of water content occur in lightweight concrete with higher w/c
ratio. An increased moist-curing period results in a decrease of drying
rates throughout the drying process
S pomočjo gravimetrične metode
smo določili spremembe s časom razporeditev vsebnosti vlage v betonskih
cilindrih, ki so bili izpostavljeni sušenju pri konstantni temperaturi in
relativni vlažnosti okolja na eni strani. Pozornost raziskave je bila
usmerjena v začetno fazo sušenja, ko so vsebnosti vode v porah betona velike,
saj je odpornost betona na več procesov propadanja zmanjšana prav pri
visokih vsebnostih vode. Eksperimentalne raziskave smo izvedli na cilindrih
različnih dolžin, narejenih iz betona z lahkim agregatom z različnimi
vodocementnimi razmerji in različnimi časi negovanja. Rezultati kažejo, da
ima beton z višjimi v/c faktorjem višje začetne vsebnosti vode, ter da se
hitreje izsušuje. Podaljšan čas nege betona pa proces izsuševanja upočasni
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| Tipologija: |
1.01 Izvirni znanstveni članek |
| COBISS ID |
117863 Polni zapis iz sistema COBISS |
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Vpisal 2001/08/08 19:56
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