The major contribution towards strength development in OPC or blended cements containing SCMs is from C-S-H gel. Do C-A-H phases increase or decrease strength development? I have two different blended mixes. One having high C-A-H content shows significantly lower strength at 7 days (7MPa against 17 MPa) but at 28 days both show almost similar strength (27 MPa against 25 MPa) i.e. little more at 28 days but significantly lower at 7 days. I have attached the TGA data for 7 and 28 days for reference
Hello Rajeev, I can't open your TGA graphics, but I have few question to understand your problem. 1) what type of pozzolana do you use to blend with OPC? What is SCM for? 2) to understand what is happening during hydration of cement you need to compare data from FTIR (structure) and TGA 3) what is temperature during curing? 4) what is the amount of OPC do you use? 5) do you use additives to accelerate the set?
Knowing These parameters, I can answer to you more precisely.
- Badges
- Science topic
- Similar topics
- Organizational Psychology
- Training