JIS A 5021:2018 PDF Download

The JIS A 5021:2018 standard for recycled aggregate for concrete-class H focuses on the manufacturing process of recycled aggregate H, which involves a high level of treatment such as crushing, grinding, and classification. This treatment is applied to concrete lumps that are generated from activities like demolishing buildings or hardening returned concrete from concrete products and ready mixed concrete.

The standard also provides a comparison table in Annex E, which highlights the technically significant revisions made between previous and current editions of the standard. This table helps users understand any changes or advancements in the standard that may be relevant to their application.

It is worth noting that the standard recognizes that concrete lumps are not only generated through building demolition but also through the hardening of concrete returned from various sources, including concrete products and ready mixed concrete. This highlights the diverse sources from which recycled aggregate can be derived and emphasizes the importance of the standard in regulating and ensuring the quality and suitability of these aggregates for concrete applications.