Table 2 Reference for categorizing concrete made with recycled coarse aggregate (RCA).
From: Evaluation on the Surface Modification of Recycled Fine Aggregates in Aqueous H2SiF6 Solution
Category | Coarse aggregate | Aggregates for concrete | ||
|---|---|---|---|---|
High quality | Medium quality | Low quality | ||
Dried density (t/m3) | Over 2.5 | Over 2.3 | – | Over 2.5 |
Absorption rate (%) | Below 3.0 | Below 5.0 | Below 7.0 | Below 3.0 |
Fine aggregate content (%) | Below 1.0 | Below 1.5 | Below 2.0 | Below 7.0 |
No. JIS | A 5021 | A 5022 | A 5023 | A 5005 |
Categorization of usage | Identical to natural aggregate or structural concrete | Concrete construction elements not affected by dry shrinkage | Non-structural elements that do not require durability and strength | – |