TS EN 14487-1

TS EN 14487-1 is the first part of the sprayed concrete standard, setting out definitions, key properties, classification and conformity principles. It provides a common technical framework for sprayed concrete used in repair and upgrading of structures, in new construction and in ground strengthening, and it applies to both wet-mix and dry-mix methods. For anyone working with sprayed concrete, this part explains how the material is described and which performance topics belong together.

How sprayed concrete is understood technically

Sprayed concrete is placed by conveying mortar or concrete under pressure onto a surface, which reduces the need for conventional formwork. That makes it especially useful on curved surfaces, difficult-to-access areas and projects where rapid application is important. In technical terms, the distinction between wet-mix and dry-mix sprayed concrete matters because it affects how the mix is transported and where water is introduced during spraying. This part of the standard brings together the shared vocabulary and classification basis for fresh concrete behavior, hardened concrete properties and fibre-reinforced sprayed concrete.

Main subject areas covered by this part

• Classification related to wet-mix consistence
• Environmental exposure classes
• General framework for young, hardened and fibre-reinforced concrete
• Requirements for constituent materials, concrete composition and basic mix
• Specification and conformity principles for designed and prescribed mixes

The standard also identifies the substrates to which sprayed concrete may be applied: ground such as rock and soil, existing sprayed concrete, different types of formwork, structural members made of concrete, masonry or steel, drainage materials and insulating materials. It notes that applications outside this field may need additional or different requirements, including refractory uses. In practice, TS EN 14487-1 is both a terminology-and-performance reference and a boundary-setting document for the sprayed concrete family.