20 Mm Jelly

In construction and civil engineering, the term "20 mm jelly" typically refers to a specific size of coarse aggregates used in the production of concrete. These aggregates are also known as jelly stones, blue metal, or crushed stones. Here's an explanation of the term. In construction and civil engineering, the term "20 mm jelly" typically refers to a specific size of coarse aggregates used in the production of concrete. These aggregates are also known as jelly stones, blue metal, or crushed stones. Here's an explanation of the term: