define alkali aggregate reaction - chemical
Define Alkali Aggregate Reaction - Chemical deterioration?
Sometimes high alkali cement reacts with minerals in certain aggregates and forms expansive compounds resulting into swelling of concrete which may cause cracking and spalling.
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define sulphate attack - underwater inspection of bridgecement contains a proportion of tricalcium aluminates which takes part in the hydration
define chlorides - underwater inspection of bridgechlorides do not attack plain concrete when present in the concentrations that normally exist in
define carbonation - underwater inspection of bridgecarbon dioxide is present in the air and attacks the concrete directly it has the effect of
a first order reaction takes 693 minutes for 50 completionset up an equation for determining the time needed for 80 completion of this
define alkali aggregate reaction - chemical deteriorationsometimes high alkali cement reacts with minerals in certain aggregates and forms expansive
illustrate with examplesa lyophilic and lyophobic solsb multimolecular and macromolecular colloidsc homogeneous and heterogeneous
define contaminants - underwater inspection of bridgethere are various substances that may be inadvertently incorporated into the concrete matrix eg
define marine growth - underwater inspection of bridgegenerally in seawater marine growth takes place acid generated by the marine growth attacks
a write the structural formula of 3-phenylprop-2-enalb write one chemical equation each to illustrate the following reactionsi aldol condensationii
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