ASTM D5295/D5295M-18 PDF Download

The ASTM D5295/D5295M-18 standard provides recommendations and guidelines for preparing concrete surfaces prior to the application of adhered waterproofing systems. The success of a waterproofing application depends on factors such as the type, smoothness, and cleanliness of the concrete surface being coated. This guide describes conditioning or repairing the concrete surface by removing or modifying surface defects that can affect the performance of the waterproofing system.

The standard covers surface preparation through mechanical, chemical, and blast cleaning methods to ensure good adhesion between the waterproofing system and the concrete, as well as the evaluation and control of various surface contaminants. It also addresses the evaluation of concrete moisture content to ensure an optimal initial bond. However, it does not offer guidelines for selecting a suitable waterproofing system, specific application techniques, or the design and installation of flashing, terminations, expansion joint details, etc. Additionally, the guide does not provide guidance for the control of water vapor drive through the concrete, which can affect long-term performance.

The recommended procedures described in the standard are considered minimums, and the manufacturer of the waterproofing materials may require stricter or more specific procedures for surface preparation. The guide is primarily directed towards installations of new concrete but can also be applied to existing concrete installations. It does not apply to loose laid systems, bentonite systems, lead, or applications involving insulating concrete or lightweight structural concrete. It is important to identify the type of concrete being used, as it can be difficult to visually differentiate between normal weight and lightweight concrete.