The formwork of visible concrete surfaces requires a comprehensive approach to ensure that the final product meets the requirements of the SIST EN 13670:2010 standard and qualifies as performance class VB3 or VB4. Key factors include selecting the appropriate formwork system, preparing the formwork surface, choosing the right concrete mix, planning the formwork process, considering suitable weather conditions, determining the optimal demoulding time, and leveraging experience in executing visible concrete surfaces. Effective collaboration between the supervisor, designer, contractor, technologist responsible for the concrete construction project, and other construction stakeholders is essential from the outset. Before constructing visible concrete elements as part of the building, test walls or sample fields should be created to evaluate the formwork method and system. These tests help verify the concrete mix intended for the project and establish a reference surface for quality comparison during actual construction. Despite thorough preparation, executing visible concrete elements remains a complex task. Achieving high-quality visible concrete surfaces that meet the architectural standards of VB3 and VB4 classes requires not only meticulous planning but also prior experience with similar project requirements.
|
