2.3.1 General Principles
The Czech method has been employed in the Czech Republic based on the Czech guidelines TP 109.
The distinctive feature of this method is the consideration of the influence of the coarse aggregate content on asphalt mixture properties. Some knowledge of the impact of coarse particle quantity in creating an SMA aggregate structure has been adopted during design. In the Czech method, particles bigger than 4 mm (called
HDK here as designated in Czech method) are regarded as coarse aggregate, making an active part of the aggregate mix.
