Physical Causes of Concrete Deterioration

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. Cracking by crystallization of salts pores •The crystallization of salts in the pores of concrete can produce stresses that may damage the concrete structure. This can happen when the concentration of the solute (c) exceeds the saturation concentration (Cs). Higher C/Cs ratio (degree of supersaturation) produces higher crystallization pressure.
. Deterioration by Frost Action •When water freezes, there is an expansion of 9%. However, some of the water may migrate through the boundary, decreasing the hydraulic pressure. •Hydraulic pressure depends on: (a) rate at which ice is formed. (b) permeability of the material. (c) distance to an "escape boundary."
Page 1 and 2: hysical Causes of Concrete eteriora
Page 3: avitation •Good-quality concrete
Page 7 and 8: The problem transformation of ice f
Page 9 and 10: Air-Entraining
Page 11 and 12: Degree of Saturation
Page 13 and 14: Low-temperature SEM
Page 15 and 16: Images
Page 17 and 18: Imagens Interface gelo-líquido em
Page 19 and 20: Interface gelo-líquido em soluçã
Page 21 and 22: Interface gelo-líquido em soluçã
Page 23: Does the t air void increases or de
Page 26 and 27: .2 Factors Controlling Frost esista
Page 28 and 29: C) ) Strength. No direct relationsh
Page 30 and 31: .2) D-CrackingD •Aggregate proble
Page 32 and 33: .1) Effect of High Temperature on e
Page 34: .3) Effect of High Temperature on o

Physical Causes of Concrete Deterioration

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