AZA 1109 J-RING, NARROW GAP

Description

AZA 1109 J-RING, NARROW GAP – Self-Compacting Concrete Testing Apparatus

The AZA 1109 J-Ring, Narrow Gap is a precise laboratory apparatus used to assess the passing ability of Self-Compacting Concrete (SCC) through reinforcement-like obstructions.Used in both research and quality control environments, this narrow-gap variation of the J-Ring test is more stringent, simulating congested reinforcement layouts in real-world construction. Designed in accordance with international SCC testing standards, this equipment helps determine if SCC can flow freely around rebars without segregation or blockage.

Used in both research and quality control environments, this narrow-gap variation of the J-Ring test is more stringent, simulating congested reinforcement layouts in real-world construction. The apparatus works in conjunction with a slump flow cone to measure flow diameter, flow time, and blocking assessment.

🔍 Key Features & Applications

• Simulates tight reinforcement conditions

• Accurately assesses SCC’s passing ability

• Compatible with standard slump flow cone

• Widely used in construction QC, R&D, and site testing labs

• Conforms to ASTM C1621, EFNARC Guidelines

🔧 Testing Procedure Overview

1. Place the J-Ring (narrow gap type) on a smooth, non-absorbent surface.

2. Center the slump flow cone inside the ring.

3. Fill the cone with freshly mixed SCC.

4. Raise the cone vertically to allow concrete to flow outward.

5. Measure:

   • Flow diameter

   • Flow time (T50)

   • Difference in flow with and without J-Ring (indicates blocking)

6. Analyze results to evaluate the passing ability and viscosity of the mix.

🔗 External Resources (DoFollow Links)

• EFNARC Guidelines for SCC Testing

• ASTM C1621 – Standard Test Method for Passing Ability of SCC

• The Constructor: J-Ring Test for SCC Explained

📊 Specifications

❓ Frequently Asked Questions (FAQ)

Q1: What is the purpose of the J-Ring Narrow Gap?
A: It tests SCC’s ability to flow through closely spaced rebars without blocking or segregation.

Q2: What does the narrow gap simulate?
A: It simulates highly congested reinforcement areas in concrete structures.

Q3: How does it differ from a standard J-Ring?
A: The narrow gap type has tighter spacing between vertical bars to challenge SCC flow more rigorously.

Q4: What standards apply to this test?
A: ASTM C1621 and EFNARC testing procedures for SCC.

Q5: Can I use this with regular concrete?
A: No, it is designed specifically for self-compacting concrete only.

Q6: What does the narrow gap simulate?
A: It simulates highly congested reinforcement areas in concrete structures.