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3. a) Describe Durability of Concrete. (2) b) Explain the Role of: i. Water-Cement Ratio ii. Permeability (4) (4) c) Describe ALKALI SILICA REACTION

3. a) Describe Durability of Concrete. (2) b) Explain the Role of: i. Water-Cement Ratio ii. Permeability (4) (4) c) Describe ALKALI SILICA REACTION (ASR) (5) [CLO -1,2]

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