Introduction to the new standard system on specifications and test methods for masonry units

Abstract

Masonry units are fundamental construction materials that directly influence structural durability and quality. The previous Vietnamese standard system (TCVN) was limited, focusing mainly on traditional products, lacking consistency, and omitting key performance indicators such as frost resistance, moisture expansion, and soluble salt content. To address these gaps and align with international practices, the Ministry of Construction developed two new standards: TCVN X771 – Specifications and TCVN X772 – Test Methods. These were adapted from EN 771 and EN 772 with reference to ASTM and ISO, and validated through laboratory testing in Vietnam. TCVN X771 comprises six parts specifying requirements for major masonry types, while TCVN X772 includes nineteen test methods ensuring consistency and applicability. Verification results confirmed the feasibility and reliability of new indicators. The introduction of these standards not only overcomes shortcomings of the previous system but also establishes a solid scientific and regulatory basis, thereby improving product quality, ensuring structural durability, and fostering international integration of Vietnam’s construction materials industry.