Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO TP 74:2009
• Năm ban hành / Publication date: 2009
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Method of Test for Passing Ability of Self-Consolidating Concrete (SCC) by J-Ring
• Thay thế cho / Replace: AASHTO TP 74:2008
• Số trang / Page: 5

Phạm vi áp dụng / Scope of standard

This test method 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 1-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.

The values stated in either SI units or inch-pound units are to
be regarded separately as standard. Within the text, the inch-pound
units are shown in brackets. The values stated in each system are
not exact equivalents; therefore, each system shall be used
independently of the other. Combining values from the two systems
may result in nonconformance with the standard.

This standard does not purport to address all of the safety
concerns associated with its use. It is the responsibility of the
user of this standard to establish appropriate safety and health
practices and determine the applicability of regulatory limitations
prior to use.