J Ring
Product Code : JA-CT-9909
The J Ring (SKU JA-CT-9909) determines the passing ability of self-consolidating concrete, that is, how well it flows through gaps between reinforcing bars without blocking. The ring of bars is used with the slump cone, and the J-Ring flow spread shows the restricted deformability of the concrete caused by the blocking effect of the bars. The difference between the unrestricted slump flow and the J-Ring flow indicates passing ability. The test suits laboratory comparison of mixes and field quality control. It is supplied by JaincoLab for concrete laboratories.
Specifications
The J Ring is a ring of vertical bars used with the slump cone to measure J-Ring flow and compare it with slump flow; ring diameter, number and size of bars and base plate are not listed in the product data and are confirmed on the quotation.
| Product | J Ring |
| SKU | JA-CT-9909 |
| Test | Passing ability of self-consolidating concrete |
| Result | J-Ring flow spread compared with slump flow |
| Use | Laboratory mix comparison and field quality control |
| Other use | Segregation check by comparing two portions of a sample |
Applications of the J Ring
Technicians place the ring around the slump cone, fill and lift the cone, then measure the spread and the height difference inside and outside the ring to judge blocking.
- Passing ability of self-compacting concrete
- Comparing SCC mixes in the laboratory
- Field quality control of SCC
- Segregation resistance checks
- Concrete technology practicals
Scope of supply and ordering
This listing covers the J Ring for self-compacting concrete. Slump cone and base plate are confirmed on the quotation.
Frequently asked questions
What does the J Ring test show?
The passing ability of self-consolidating concrete through reinforcement gaps.
How is passing ability judged?
From the difference between slump flow and J-Ring flow.
Can it be used on site?
Yes, as a field quality control test as well as in the laboratory.
Related products
Browse the JaincoLab concrete testing equipment range for other concrete laboratory equipment.
Request a quote
For a quotation on the J Ring, share the quantity, any size or specification preference and the destination via the JaincoLab contact page; the sales team also answers at [email protected]. Tender and project enquiries can be sent through the tenders page.
