white layer on the surface of clinker in the storage yard

hello every one ,

i want know , why the white layer appears on the surface of the clinker in the open air storage yard , is there any effect on the clinker quality due to this layer?   

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Re: white layer on the surface of clinker in the storage yard

Dear Azhar,

In the storage yard your clinker getting hydrolysed, leaving a white layer of Calcium hydroxide on the surface. This happens when clinker is stored for prolonged time in open storage yard.

Hydration of C3S and C2S , along with free lime bound to decrease your compressive strength. Though the hydration of free lime may reduce unsoundness in cement

Regards,

Gulam Dastgir

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Re: white layer on the surface of clinker in the storage yard

thank you Mr,Gulam Dastgir for the quick reply 

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