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CE 308
Plain and Reinforced Concrete I
Admixtures
Dr. WasimKhaliq
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Admixtures
Types
Chemical Admixtures
Mineral Admixtures
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Admixtures
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Mineral Admixtures
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By Products
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Pozzolanic Reaction
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Blast Furnace Slag
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Pozzolans Effect on Strength
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Chemical Admixtures
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Admixtures Effect
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Use of Chemical Admixtures
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Air Entrainment
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ater Reducers
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Classification of ater Reducers
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Su!er!lasticizer "SP# or $igh Range ater Reducers "$RR#
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Mechanism of ater Reduction
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Mechanism
Electrostatic dispersion of cementgrains
Steric stabilization dispersion ofcement grains
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Effects on Fresh Pro!erties
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Effects on Fresh Pro!erties
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Effects on $ardened !ro!erties
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Set%Accelerating Admixtures
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Set%Retarding Admixtures
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Extended Set Control "Ready Mixed Concrete#
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Effect on Concrete Pro!erties
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Chemical Admixtures Effect on Strength
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