Discussion
Rice husk ash is used commercially chiefly as
Answer: B
Correct answer: A pozzolan in cement and concrete
Rice husk ash is nearly all silica, and when that silica is amorphous it reacts with the calcium hydroxide released as cement hydrates, forming additional binding compounds. That is what a pozzolan does, and it improves strength and durability while replacing part of the cement.
The value depends entirely on the ash being amorphous, which means burning below about 700 degrees. Above that the silica crystallises and the pozzolanic activity is lost, leaving an inert filler. The ash is not a fermentation substrate, a feed or an oil source.
No comment is present. Be the first to comment.
Loading…
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