DIN EN 1504-9 PDF Download

The DIN EN 1504-9 standard provides guidance for specifying protection and repair for reinforced and unreinforced concrete structures. This standard applies to various types of structures such as pavements, runways, floor slabs, and pre-stressed structures, considering different exposure conditions such as atmospheric, buried, and submerged.

The standard covers several important aspects including the need for inspection, testing, and assessment before and after repair. It also addresses the protection of concrete structures from different causes of defects, such as mechanical actions (impact, overloading, settlement, etc.), chemical and biological actions (sulphate attack, alkali aggregate reaction), physical actions (freeze-thaw, thermal cracking, moisture movement), fire damage, and reinforcement corrosion.

Additionally, the standard provides guidance on repairing defects caused by inadequate design, specification, construction, or the use of unsuitable construction materials. It outlines different methods to provide the required structural capacity, such as adding or replacing embedded or external reinforcement, filling cracks and voids, or replacing concrete or whole elements. The standard also emphasizes the integration of waterproofing as a crucial part of protection and repair.