Discussion
Bleeding channels in concrete remain continuous if the water-cement ratio used is :
Answer: B
Bleeding channels remain continuous when the water-cement ratio is more than 0.7.
As fresh concrete settles, surplus mix water rises to the surface and leaves fine channels behind it. In a normal mix the products of hydration grow into these channels and gradually block them. With a water-cement ratio above about 0.7 there is so much water, and so little cement to hydrate, that the channels can never be closed, so they stay continuous and the hardened concrete remains permeable.
So the effect does depend on the water-cement ratio, which rules out option A, and below 0.7, or at the boundary value, the channels are eventually segmented.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development