@Zander Hi Zander, It's been a while since I worked with concrete in a modern fast track environment but I do remember we used to test our concrete with every delivery. Most frequently using a slump gauge, see - https://www.sitebox.ltd.uk/concrete-testing-slump-cone-osc8100?paid=googlepaidproducts&gclid=EAIaIQobChMIj9yCwPqq7gIVRuR3Ch0cCAjmEAYYAiABEgKEM_D_BwE That page also has moulds for casting test blocks. Which can then be tested to destruction in various ways. E.g. crushing to test compressibility, I've also seen people keep them in sealed containers of water for several months, and then cut them to see how far it has penetrated. I dare say there are more tests you can do ...