AASHTO T 345-12 (2020) PDF Download

AASHTO T 345-12 (2020) is a standard testing method that focuses on determining the passing ability of self-consolidating concrete (SCC) using the J-Ring method. This standard applies to both laboratory and field testing. SCC is a type of concrete that possesses high workability, allowing it to flow through densely reinforced or complex structural elements without the need for vibration. It can also adequately fill voids without experiencing segregation or excessive bleeding.

The passing ability of SCC is defined as its capability to flow through openings, such as spaces between reinforcing bars, without segregating or encountering aggregate blocking. Segregation refers to the separation of the concrete mix into its components, while aggregate blocking occurs when coarse aggregate pieces combine and obstruct the flow of SCC between obstructions in the concrete formwork. By conducting the J-Ring test as outlined in this standard, the passing ability of SCC can be evaluated and verified.