| abstract |
The invention discloses a method for quickly judging whether the methylene blue value of machine-made sand is qualified. The fluidity increases, therefore, the method of the present invention designs the ratio of the fluidity of the cement slurry of the machine-made sand powder to be tested to the powder cement slurry with a methylene blue value of 1.4 as the reference fluidity ratio K is the criterion, and the K value If it is greater than or equal to 1, the judgment result is qualified; if the K value is less than 1, the judgment result is unqualified. |