Discussion
The heat of hydration of cement is a concern in mass concrete because
Answer: A
Correct answer: temperature differences cause cracking as the structure cools
Hydration is exothermic, and in a large pour the heat cannot escape, so the core rises well above the surface temperature. The surface then cools and contracts against a hot, expanded core, and later the whole mass contracts against its restraints - producing cracking in both phases. The remedies all attack the heat: low-heat cements, partial replacement with fly ash or slag, cooled aggregate, and pipe cooling.
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