EN 772 Edge and Corner Strength Testing

The EN 772 series of standards provides a comprehensive framework for testing construction materials to ensure their quality meets stringent European requirements. Specifically, EN 772-1:2018 covers the physical and mechanical properties of cement-based composite materials used in building and civil engineering structures.

The Edge and Corner Strength Testing under EN 772 is a critical component for assessing the strength of masonry units, including bricks. This service helps ensure that construction materials can withstand the stresses encountered during structural integrity testing, such as bending or compression forces at edges and corners. The test is particularly important in sectors like building and infrastructure where structural reliability is paramount.

During this testing procedure, specimens are prepared to simulate real-world conditions for masonry units. Specimens are cut from bricks according to specified dimensions (typically 50 mm x 50 mm x 25 mm). The test involves applying a load at the edge or corner of the specimen until failure occurs. Failure loads are recorded and used as an indicator of the material's strength.

The Edge and Corner Strength Testing is not just about compliance—it ensures that construction materials can perform reliably in harsh environmental conditions. This service supports quality management, procurement processes, and R&D efforts by providing accurate data on the performance characteristics of masonry units.

Industry Applications
Application Area	Description
Bridge Construction	Evaluating the strength of bricks used in bridge piers and abutments.
Tunnel Linings	Ensuring that masonry units can withstand the pressure exerted by tunnel walls and ground loads.
Building Facades	Testing bricks for their ability to resist wind loading and other environmental stresses.

Bridge Construction
Tunnel Linings
Building Facades

Applied Standards

The primary standard used for Edge and Corner Strength Testing is EN 772-1:2018. This European Standard specifies the methods of testing the physical, mechanical, and hydraulic properties of cement-based composite materials. The standard ensures that masonry units are tested in a consistent manner across Europe, facilitating international trade and harmonization.

Other relevant standards include EN 936:2015 for determining the frost resistance of bricks and ISO 1087-1:2014 which covers the determination of compressive strength of un-fired bricks. These standards complement each other, providing a holistic approach to assessing masonry materials.

The testing methods outlined in EN 772 are designed to simulate real-world conditions as closely as possible. This ensures that the test results accurately reflect how the material will perform under actual use.

Industry Applications

Use Cases and Application Examples
Application Example	Description
Evaluating the strength of bricks for use in bridge piers.	Bricks used in bridge structures must be able to withstand significant loads. This test ensures that they can do so safely and reliably.
Assessing masonry units for tunnel linings.	Tunnel walls require bricks that are strong enough to resist the pressure exerted by ground loads. The test checks if these requirements are met.
Testing building facades for wind loading resistance.	Bricks in building facades must be able to withstand environmental stresses, including high winds. This test ensures that they can do so without compromising structural integrity.

Frequently Asked Questions

What is the purpose of Edge and Corner Strength Testing?

The primary purpose is to evaluate the strength of masonry units, especially at edges and corners. This test ensures that materials can withstand physical stresses in real-world applications.

Which standard does this testing follow?

The test follows EN 772-1:2018, which specifies the methods for testing the physical and mechanical properties of cement-based composite materials.

What kind of specimens are used in this test?

Specimens are typically cut from bricks to a standard size (50 mm x 50 mm x 25 mm) and tested under load at the edge or corner.

Why is this test important for building facades?

It ensures that bricks used in facades can withstand wind loading and other environmental stresses, maintaining structural integrity over time.

How are specimens prepared before testing?

Specimens are cut to standard dimensions from bricks. They are then subjected to a load at the edge or corner until failure occurs, and the load is recorded.

Can you provide an example of where this test is used in bridge construction?

In bridge piers and abutments, bricks are subjected to significant loads. The Edge and Corner Strength Test ensures that these materials can withstand those stresses.

What is the significance of this test in tunnel linings?

Tunnel walls require bricks that are strong enough to resist pressure exerted by ground loads. This test ensures they can do so without compromising structural integrity.

Is this testing limited to EN standards?

While the primary standard used is EN, other relevant international standards like ISO and ASTM may also be applicable depending on regional requirements.