To get an accurate reading, the load must be applied evenly. Since bricks often have uneven surfaces, the standard details methods for "capping"—applying a layer of gypsum plaster or mortar to create a flat surface—or grinding the faces flat.
The compressive strength of the assembled components (masonry units, mortar, and grout) must meet or surpass the stipulated strength to provide a safe building that can withstand anticipated service loads. The standard navigates users through the specifications of masonry units to determine if they are fit for their intended purpose. By complying with BS EN 772-1, manufacturers can demonstrate the quality, performance, and reliability of their products, thereby achieving the required structural integrity for construction works.
Understanding BS EN 772-1:2011+A1:2015 - Compressive Strength Testing of Masonry Units
The standard applies globally to various masonry types, though preparation techniques vary depending on the material: bs en 7721 pdf
If your work involves clay or calcium silicate units (common bricks and blocks), BS EN 772-21 is highly relevant. Water absorption is a key indicator of durability and is critical for ensuring good bond with mortar.
) sustained by the specimen at failure. Note the failure mode (e.g., conical, shear, or splitting failure). Understanding Normative Conditioning and Shape Factors
For the technical user, this standard is notable for its handling of . Unlike older British Standards (which often used strict mortar capping), BS EN 772-1 permits methods that align with European practice. The choice of capping material can significantly influence the final strength result; the standard provides correction factors to account for the stiffness of the capping material relative to the masonry unit. To get an accurate reading, the load must be applied evenly
Executing a compliant test sequence requires strict adherence to preparation, conditioning, and crushing criteria. 1. Specimen Selection and Dimensional Measurement
91.100.15 (Mineral materials and products), 91.100.25 (Terracotta building products).
The compressive strength is a critical property of masonry units as it directly influences the structural integrity and safety of buildings and other constructions. Builders, architects, and engineers rely on these standards to ensure that the materials used meet specific performance criteria. The standard navigates users through the specifications of
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The BS EN 772-1 PDF document provides detailed guidance on the testing and evaluation of masonry units. The standard covers the following aspects:
As with most EN standards, the document is dense and requires careful reading. It is not a "how-to" guide but a specification document.
The standard details rigorous testing protocols to determine the maximum compressive load a masonry unit can bear before failure. 1. Sample Preparation