1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard.The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.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.
The highly fluid nature of SCC makes it suitable for placing in difficult conditions and in sections with congested reinforcement.
Use of SCC can also help minimize hearing-related damages on the worksite that are induced by vibration of concrete.
The U-Box and L-Box tests are used for product development or prequalification and involve filling concrete on one side of the box and then opening a gate to allow the concrete to flow through the opening containing rebar.
Structural elements designed with reinforcing steel often require the use of Self-Consolidating Concrete (SCC) mix designs to assure structures free of voids and honeycombing.
The spread can range from 18 to 32 inches (455 to 810 mm).
The resistance to segregation is observed through a visual stability index (VSI).
Another advantage of SCC is that the time required to place large sections is considerably reduced.
When the construction industry in Japan experienced a decline in the availability of skilled labour in the 1980s, a need was felt for a concrete that could overcome the problems of defective workmanship.
Additional measurements or visual classifications may also be determined at the conclusion of the test.
Current Developments in Self-Compacting Concrete Introduction Self-compacting concrete (SCC) is a flowing concrete mixture that is able to consolidate under its own weight.
The J-Ring test, in conjunction with the Slump-Flow test, is one way to determine the passing ability of SCC, defined as the ability of the concrete to flow under its own weight to completely fill all spaces within the formwork.