AZA 0789 RING MOULD

Description

Ring Mould is a critical component in cement and mortar testing, used to form standardized specimens for expansion, consistency, and setting time evaluations. Crafted from durable metals like brass or gunmetal, this mould ensures accurate, repeatable sample preparation for laboratory testing — whether in cement manufacturing units, third-party QC labs, or academic research facilities.

Most commonly, the Ring Mould is associated with tests like Le Chatelier expansion test, which determines the soundness of cement. This test evaluates the material’s volume stability after setting, ensuring that it won’t crack or distort in service. The Ring Mould provides a uniform containment structure for the cement paste, enabling controlled expansion measurement.

As per IS 4031 (Part 3):1988 – Methods of Physical Tests for Hydraulic Cement: Determination of Soundness, the Ring Mould must be used with a split cylinder (typically in the Le Chatelier apparatus) to assess cement expansion. Similarly, ASTM C151 – Standard Test Method for Autoclave Expansion of Hydraulic Cement references a comparable design for performing high-temperature expansion tests.

Key Features:

• Cylindrical mould with precise inner diameter and height

• Typically includes a slit or split for use with Le Chatelier setup

• Smooth inner walls for easy demoulding of samples

• Designed to hold freshly prepared cement paste or mortar

• Manufactured to tight tolerances for repeatability

The Ring Mould is critical to preparing specimens that reflect true material behavior under controlled conditions. This consistency is especially important in comparative testing, quality certification, and research-based formulation trials.

Common Applications:

• Le Chatelier soundness testing

• Autoclave expansion tests

• Cement setting time comparisons

• Consistency and flow behavior studies

• Civil engineering education and training labs

In Le Chatelier tests, the mould is filled with a cement paste of standard consistency. Once set and subjected to boiling or autoclave conditions, the distance between the mould’s indicators is measured before and after treatment to assess expansion. This helps detect excess free lime or magnesia, which can cause late-stage cracking in cementitious structures.

Why Choose This Ring Mould?

• Compliant with international standards

• Highly reusable and resistant to chemical wear

• Accurate dimensional stability for repeat testing

• Works with Le Chatelier apparatus for expansion measurement

• Lightweight and easy to clean

The Ring Mould may also be used independently for creating mortar rings in flow and shrinkage tests. When handled correctly, it allows consistent formation of samples for both destructive and non-destructive analysis.

Specifications:

Frequently Asked Questions (FAQ):

Q1: What is the Ring Mould used for in cement testing?
It’s primarily used for forming cement or mortar specimens to test expansion, soundness, and setting time.

Q2: Which standards apply to Ring Mould usage?
It conforms to IS 4031 Part 3 for soundness testing and ASTM C151 for autoclave expansion.

Q3: Is this mould reusable?
Yes. When cleaned properly after each use, the mould maintains its dimensional accuracy and finish over many test cycles.

Q4: Can I use this mould with Le Chatelier apparatus?
Yes. This mould is designed to fit seamlessly into Le Chatelier expansion testing setups.

Q5: What material is preferred — brass or gunmetal?
Both are corrosion-resistant and durable. Gunmetal offers slightly better wear resistance under frequent thermal cycling.