Question

The strength and the quality of concrete depend upon

• A. Grading of the aggregate
• B. Surface area of the aggregate
• C. Surface texture of the aggregate
• D. All the above

Answer 1

The correct option is D All the above

Factor affecting strength of concrete are

• W/C ratio : Lower the W/C, higher the strength of concrete provided concrete is workable.
• Cement aggregate ratio : increase in cement aggregate ratio the ultimate strength will increase provided all other things are constant.
• Surface area of aggregate : Larger surface area will require higher W/C ratio resulting in lower strength.
• Surface texture of aggregate : Rougher the surface, higher the bond strength.
• Compaction : Higher the compacting effort, lower the air voids, higher the strength.