Frost Susceptibility of Concrete in Near‐Saturated States

Autor:	K. S. Soo, B. V. Enüstün, K. L. Bergeson
Rok vydání:	1994
Předmět:	Materials science Mathematical model Degree of saturation Building and Construction Mechanics Gas phase Mechanics of Materials Compressibility General Materials Science Geotechnical engineering Frost (temperature) Air entrainment Porous medium Saturation (chemistry) Civil and Structural Engineering
Zdroj:	Journal of Materials in Civil Engineering. 6:290-306
ISSN:	1943-5533 0899-1561
DOI:	10.1061/(asce)0899-1561(1994)6:2(290)
Popis:	A two‐stage freezing model is proposed for concrete at a near‐saturated state. The first‐stage involves a mechanism considered by Powers, while the second‐stage is based on a theory due to Everett. The volumetric consequences of this model checked by dilatometry do not perfectly materialize, since the pore air is not compressible enough as assumed in Powers' theory. Experiments qualitatively confirm the expected abrupt dependence of frost damage on degree of saturation. The role of air entrainment in minimizing the frost damage in the field is explained primarily by lowering the rate of saturation and partly by its retardation of the second‐stage freezing by increasing the compressibility of the gas phase. Experiments also confirm that the dilatometric expansion on freezing is a measure of significant damage as predicted by the proposed model.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e7b6a4cdacd97a330784b4f99f155f0b https://doi.org/10.1061/(asce)0899-1561(1994)6:2(290) Zobrazit plný text záznamu