The newest ACI Field Testing Technician Grade 1 book (CP-1 40th edition printed in January 2023) shows what you call the "open top mixer" as a 'continuous mixer truck." I'm wondering where the discrepancy is. Our company owns a few and we call them "Zimmers."
I have a doubt we should collect samples after 10% for example if we have rotating drum mixer 10m³ of total volume we could not use 1st 1m³. This 1m³ we have to dump on a receptacle or pour into a structur?
Question, you said do not take sample from the first 10 % or last 90% of the batch. Can you explain what you mean by this? That equals 100% so when do you collect sample?