how to apply grout method of I girder

Hello Vikas, the procedure to apply Grout method is -

1)After measuring the slip of 24hrs, the extended cables shall be cut off
50mm away from bearing plates.

2) Cement mortar of 1:1 ratio is applied over the Bearing Plates on both ends of girders to prevent the leakage of Grout. Grouting operation shall be commenced after two days of sealing the ends.

3) Water cement ratio should be as low as possible consistent with workability. This ratio is 0.42 (not more than 0.45 as per MOST,P-677) proportions of material shall be based on field trials made on the Grout before commencement of grouting. As per specifications, the temperature of the Grout maintained at 250C by adding ice into water if necessary.

4) Water shall be poured in to the mixer with Port land cement and admixture is added into it. Mixing shall be continued for duration to obtain uniform and thoroughly blended Grout. Grout shall be continuously agitated and then pour into another tank after passing through the screen.

5) Ducts shall be flushed with water for cleaning as well as for wetting the surface of the duct walls.

6) The water in the duct shall be blown out with compress air.

Hope this helps.

Thank you.