What is the initial and final setting time for OPC cement?
Table of Contents
What is the initial and final setting time for OPC cement?
Standard Specification of Setting Time for Different Type of Cement
| Cement Type | Initial Setting Time, min (min.) | Final Setting Time, min (max.) |
|---|---|---|
| OPC(53) | 30 | 600 |
| SRC | 30 | 600 |
| PPC | 30 | 600 |
| RHPC | 30 | 600 |
What is the final setting time of OPC?
Detailed Solution
| Cement | Initial setting time | Final setting time |
|---|---|---|
| Ordinary Portland cement | 30 minute | 10 hours |
| Rapid hardening cement | 30 minute | 10 hours |
| High alumina cement | 3.5 hour | 5.5 hour |
| Low heat cement | 1 hour | 10 hours |
How much initial setting time is minimum for OPC cement?
The time elapsed between the moments when water is added to the cement to the time when the square needle penetrates a depth of 33 to 35 mm from the top of the mould is known as the Initial Setting Time of that cement. The initial Setting Time should not be less than 30 minutes for Ordinary Portland Cement.
What are the limiting values of setting and hardening time of OPC as per IS?
Its initial setting time shall not be less than 60 minutes and final setting time shall not be more than 10 hours. The rate of its developing strength is very slow.
What should be the minimum fineness for Grade 53 OPC?
Table 1: Physical and Chemical Requirements for Hydraulic Cement
| 1 | Physical requirements | OPC 53 (conforming to IS 12269:2013) |
|---|---|---|
| i. | Fineness, m 2 /kg, Min. | 225 |
| ii. | Soundness: | |
| a) By Le Chatelier method, mm, Max | 10 | |
| b) By autoclave test method, percent, Max | 0.8 |
What is the initial setting time in case of OPC Mcq?
Explanation: As per IS specification, the minimum initial setting time is 30 minutes for ordinary portland cement.