Calculate the Actual Water Cement Ratio

A jobsite delivery ticket is shown below for a grout mix.  The actual w/c ratio is most nearly:

Solution:     

Note, although there is a significant amount of Non Chlorinated

Accelerator (NC ACC) in the grout mix, the product is a water reducing agent and is not added to the w/c ratio. 

[(2,592-oz ÷ 128-oz/gal * 8.345-gal/lb = 167-lb]  

Calculate the total weight of the water:

Water = (2,394-lb) + (Sand 18,640-lb x 4.4%) = 3,214-lb   

Calculate the total Weight of Cement:

Type1 9,100-lb + FlyAsh 1,595-lb = 10,695-lb  

Calculate the w/c ratio. Since the units are the same, the ratio can be directly calculated:

W/c = 3,214-lb ÷ 10,695-lb = .300