Sir

First of all a gentle wish and in above matter i want to say if alkali content in our cement is high than S.D will be higher but by means of fineness we can maintani difference low

Most appropriate reply will be ,lmit for Alkali in clinker to assure good quality : Na2O + K2O = 1.5%.

You should also first read the significance of Standard Deviation (S.D.) as it is difficult to understand your question.

Hi Mr Ted,

Would you please to send that detailed reply at the email tuanbk06@gmail.com.

Thank you so much .

 Hi Mr Ted !

i received the email of you, thank you so much for sharing me that document