The content of machine-made sand and gravel powder is a required item of production. What are the main detection methods?

The content of machine-made stone powder generally has two test methods: water washing method and dry sieve method. The representative ones are American ASTMC136 or AASHTOT27, suitable for dry sieve, ASTMC117 or AASHTOT11, suitable for water sieve. However, China has always been on cement concrete aggregates or asphalt pavement aggregates, and the dry sieving method is directly used. The 0.075mm sieve throughput is not determined by water washing, so the accuracy is poor. The dry sieve method is mainly applicable to aggregates for cement concrete, and also needs to be comprehensively evaluated in combination with the detection results of methylene blue value.