AASHTO T 345-12（2020）包括在实验室和现场通过J形环法测定自密实混凝土（SCC）的通过能力（注1）。SCC被定义为一种高和易性混凝土，它可以在自身重量下流过密集的钢筋或复杂的结构构件，而不会发生振动，并充分填充空隙，而不会出现离析或过度泌水。注:通过能力是指SCC在不发生离析或骨料堵塞的情况下通过开口（如钢筋之间的空间）的能力。堵塞是指粗骨料结合形成足够大的构件，以阻止钢筋之间的SCC流动或混凝土模板中的其他障碍物。

AASHTO T 345-12 (2020) covers determination of the passing ability (Note 1) of self-consolidating concrete (SCC) by the J-Ring method, both in the laboratory and in the field. SCC is defined as a highly workable concrete that can flow through densely reinforced or complex structural elements under its own weight without vibration and adequately fill voids without experiencing segregation or excessive bleeding.Note - Passing ability is defined as the ability of SCC to flow through openings such as the spaces between reinforcing bars without segregation or without aggregate blocking. Blocking is defined as the condition in which pieces of coarse aggregate combine to form elements large enough to obstruct the flow of the SCC between reinforcing bars or other obstructions in the concrete formwork.