ELASTIC RECOVERY MOULD AZA0958

Description

Importance of Elastic Recovery Testing

In conventional and modified asphalt pavements, bitumen is often enhanced with polymers to improve elasticity and durability. The elastic recovery test evaluates how effectively a binder can return to its original shape after being stretched.

This property is crucial because:

• Elastic binders absorb traffic-induced stresses more effectively

• Higher elastic recovery reduces permanent deformation (rutting)

• Improved elasticity minimizes cracking under thermal cycling

• Polymer-modified binders with good recovery extend pavement service life

The AZA0958 Elastic Recovery Mould enables precise sample preparation, which is fundamental to obtaining meaningful and comparable test results.

Principle of Use

The elastic recovery test using the AZA0958 mould follows a standardized procedure:

1. Heated bitumen is poured into the mould cavity and allowed to cool, forming a uniform test specimen.

2. The specimen is mounted in a ductility testing machine.

3. The sample is elongated at a controlled rate, typically 5 cm/min, in a temperature-controlled water bath.

4. Once the specimen reaches a specified elongation (commonly 20 cm), it is cut at the midpoint.

5. The two ends are allowed to retract freely.

6. The recovered length is measured and expressed as elastic recovery (%).

The mould’s dimensional accuracy ensures consistency across tests and laboratories.

Design and Construction Features

The AZA0958 Elastic Recovery Mould is designed for durability, precision, and ease of use:

• High-Grade Construction
  Manufactured from premium brass or stainless steel for excellent thermal stability and mechanical strength.

• Precision Machining
  Smooth internal cavity ensures accurate specimen geometry and easy demolding without distortion.

• Dimensional Stability
  Maintains exact dimensions during repeated heating and cooling cycles.

• Reusable Design
  Suitable for long-term laboratory use with proper cleaning and handling.

• Universal Compatibility
  Designed to fit standard ductility testing machines used worldwide.

Key Features & Benefits

• Conforms to international elastic recovery testing standards

• Ideal for polymer-modified and elastomer-modified bitumen

• Brass or stainless steel options available

• Smooth surface finish for clean specimen removal

• High repeatability and reproducibility of test results

• Long service life in QA/QC and research laboratories

Applications

• Highway and road construction material testing

• Polymer-modified bitumen (PMB) quality evaluation

• Asphalt mix design and formulation research

• Bitumen plant QA/QC laboratories

• Academic and institutional research on binder elasticity

Technical Specifications

Model Number: AZA0958

Product Type:

• Elastic Recovery Mould for Bitumen Testing

Standard Compliance:

• ASTM D6084

• EN 13398

Material Options:

• Brass

• Stainless Steel

Dimensions:

• As per ASTM / EN standard specifications

Application:

• Elastic recovery and ductility testing of bituminous binders

Compatibility:

• Standard ductility testing machines

Usage Temperature:

• Room temperature to 25 °C water bath

Reusability:

• High (with proper cleaning and maintenance)

Maintenance and Cleaning

After testing, allow the mould to cool naturally. Residual bitumen can be removed using a soft cloth and an appropriate solvent such as toluene or equivalent laboratory-grade cleaner. Avoid abrasive tools to preserve surface finish and dimensional accuracy.

Frequently Asked Questions (FAQ)

Q1: What is the primary use of the AZA0958 Elastic Recovery Mould?
It is used to prepare standardized bitumen specimens for elastic recovery and ductility testing, especially for polymer-modified binders.

Q2: Which standards does the AZA0958 comply with?
The mould conforms to ASTM D6084 and EN 13398 requirements.

Q3: Can this mould be used for unmodified bitumen?
Yes, it can be used for conventional bitumen, although it is most critical for evaluating polymer-modified binders.

Q4: Is the mould compatible with all ductility testers?
Yes, it is designed to work with all standard ductility testing machines used globally.

Q5: What material should I choose—brass or stainless steel?
Brass offers excellent thermal stability and corrosion resistance, while stainless steel provides higher mechanical strength and extended durability.

Summary

• Essential accessory for elastic recovery testing of bituminous binders

• Ensures standardized and accurate specimen preparation

• Critical for evaluating polymer-modified bitumen performance

• Manufactured from precision-machined brass or stainless steel

• Fully compliant with ASTM and EN standards

• Ideal for road construction, QA/QC, and research laboratories