Question

Which one of the following is not required in concrete mix-design?

• A. Degree of quality control of concrete
• B. Workability of concrete
• C. Characteristic compressive strength of concrete at 28 days
• D. Initial setting time of cement

Answer 1

The correct option is D Initial setting time of cement

According to IS: 456 - 2000 and IS : 1343 - 1980, the design of concrete mix should be based on the following factors:
(i) Characteristics compressive strength
(ii) Type of cement
(iii) Maximum nominal size of aggregates
(iv) Grading of combined aggregates
(v) Water-cement ratio
(vi) Workability
(vii) Durability
(viii) Degree of quality control