Simply put, aggregate is the sand and gravel in concrete and mortar (of course, there are many others in new building materials). They act as skeletons, so they are called aggregates. Generally speaking, sand is fine aggregate and stone is coarse aggregate.

Masterbatch should be the raw material used to produce additives (also known as additives). After processing (heating, chemical, physical and other reactions), it becomes the finished product of additives, and adding a small amount of concrete and mortar can improve the performance.