Arrange the steps of 'DOE method of concrete mix design' from first to last.

I. Find the target mean strength from the specified characteristic strength

II. Calculate the water/cement ratio

III. Find the cement content knowing the water/cement ratio and water content

IV. Proportion of fine aggregate is determined in total aggregate

V. Find out the total aggregate content

VI. Decide water content for the required workability, expressed in terms of slump or vebe time 

Concept:

The DOE (Department of Environment) method of concrete mix design involves a systematic process to achieve the desired concrete mix with specified characteristics and performance criteria. The steps must be followed in a logical sequence to ensure accurate mix design.

Steps:

• Step I: Find the target mean strength from the specified characteristic strength
• Step II: Calculate the water/cement ratio
• Step III: Decide water content for the required workability, expressed in terms of slump or vebe time
• Step IV: Find the cement content knowing the water/cement ratio and water content
• Step V: Find out the total aggregate content
• Step VI: Proportion of fine aggregate is determined in total aggregate

Conclusion:

The correct sequence of steps in the DOE method of concrete mix design is I, II, VI, III, V, IV