I am using ICAR rheometer for the determination of static yield stress for different resting times. I observed the negative yield stress values for initial period of time i.e for 5 min and 10 min resting time since the rheometer testing was started. But after the 10 min resting time for all other rest times I found the positive yield stress values.

Can someone please tell me why this happened?

More Swapnil Balasaheb Ghodke's questions See All
Similar questions and discussions