Correct option is C
Admixtures are chemical substances added to concrete in small quantities to modify its properties such as setting time, workability, strength and durability.
Accelerating admixtures are those which reduce the setting time of cement and increase the rate of early strength development. These are generally used in cold weather concreting and where early removal of formwork is required.
Analysis of Options
- Teepol → Air entraining agent
- Vinsol resin → Air entraining agent
- Darex → Air entraining agent
- Triethanolamine → Acts as a setting accelerator and is used to increase early strength of concrete
Conclusion
Triethanolamine is an accelerating admixture among the given options.
Correct Option:
C) triethanolamine
