How to judge good aggregate gradation?

The quality of aggregate gradation can be measured by the density mentioned after batching, and the high packing density shows that the formula is reasonable and the batching is good. \ r \ Particle gradation is an important performance index of aggregate. Aggregate with good gradation has reasonable particle size content, no more or less, and low porosity, which can reduce the amount of water and cementitious materials under the same workability of concrete. The traditional thought is that aggregate only plays the role of inert filling, and its ability to improve the performance and economy of concrete has not been well understood. With the use of fine aggregates such as machine-made sand instead of river sand, the aggregate types of concrete become complicated. It takes a long time to design the mixture ratio by using the traditional method of drawing up the mixture ratio of various aggregates first and then adjusting it through experiments. Using aggregate two-factor theory combined with ACI screening suggestion can not only optimize aggregate gradation, but also predict the workability of concrete mixture according to gradation, which provides convenience for concrete work. \ r \ For detailed information on how to judge good aggregate gradation, please visit:/ask/b643031615772130.html? Zd view more content