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- W833001856 abstract "In this report a comparison is made between a new type of air-entraining agent (SJ-2) based on saponin and the traditional air-entraining admixture Vinsol Resin. It is shown that both admixtures significantly improve the salt-frost resistance of concrete made with the water-cement ratio 0.50. Good salt-frost resistance, as judged by Swedish rules, is obtained when the air content of the fresh concrete exceeds about 6Vo.There is no significant difference between the two admixtures. Both admixtures create air-pore systems that are very stable. The loss in air content between the fresh and hardened concrete is on an average only 0.3Vo. The air-pore structure was analysed by automatic image analysis. The specific area of the pore system is very high with both admixtures, showing that the air-pores formed are small in both cases. There is no important difference between the two admixtures. The strength loss for one percent increase in the air content is about 4-5Vo. This is a normal value found for almost all air-entraining admixtures. There is a slight indication of a smaller strength loss when the admixture SJ-2 is used. This difference, however, can not be regarded significant due to the limited amount of data. All results indicate that the new admixture SJ-2 is well suited for the production of concrete with high salt-frost resistance." @default.
- W833001856 created "2016-06-24" @default.
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- W833001856 date "1998-01-01" @default.
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- W833001856 title "Freeze-thaw resistance of concrete with a new type of air-entraining agent (SJ-2)" @default.
- W833001856 hasPublicationYear "1998" @default.
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