Before revision: Frost damage can be prevented by the use of frost-proof materials, i.e., a material which has sufficient closed pores, by which the volume increase caused by the freezing of water in capillary pores can be absorbed by the ice-free closed pores.Pakkala T.A., Köliö A., Lahdensivu J. and Kiviste M. (2014).
After revision: Pornhub.comFrost damage can be prevented by the use of frost-proof materials, i.e., a material which has sufficient closed pores, by which the volume increase caused by the freezing of water in capillary pores can be absorbed by the ice-free closed pores.Pakkala T.A., Köliö A., Lahdensivu J. and Kiviste M. (2014).