The Department of Environment (DOE) method is used for: (i) Concrete mix design (ii) Road mix design (iii) Mix Design with pulverized fuel ash (iv) Mix Design with GGBFS
Try it first: pick an option, then read the explanation.
Correct answer: C. (i), (ii), (iii), and (iv)
Detailed Explanation: The DOE Method of Concrete Mix Design
Why C (all four) is correct: The DOE method was developed by the UK Building Research Establishment (BRE) and published as “Design of Normal Concrete Mixes.” It covers a wide range of applications through separate design charts and correction procedures for each case.DOE Method Coverage
| Application | DOE Method Coverage |
|---|---|
| (i) General concrete mix design | Primary application — normal OPC concrete |
| (ii) Road mix design | Extended to pavement concrete design |
| (iii) PFA/Fly ash concrete | Uses “equivalent cement factor” for PFA |
| (iv) GGBFS concrete | Uses “equivalent cement factor” for slag |
Comparison of Mix Design Methods
| Method | Developed By | Standard Used In |
|---|---|---|
| DOE method | UK Building Research Establishment | UK, many Commonwealth countries |
| IS 10262 | Bureau of Indian Standards | India |
| ACI 211.1 | American Concrete Institute | USA |
| Road Note 4 | Transport Research Lab, UK | UK road pavements |
- DOE method covers all four applications: general mix design, road mixes, PFA, and GGBFS.
- For PFA and GGBFS: DOE uses the concept of “cementing efficiency factor (k)” — each kg of SCM is treated as k kg of OPC for strength prediction.