T/CECRPA 018-2025 Technical Specifications for the Application of Environmentally Friendly Ecological Thin Layer Asphalt Concrete (ECA)

Scope

Scope: This document specifies the technical requirements for the design, application, and quality inspection and evaluation of eco-friendly thin-layer asphalt concrete (ECA) in new construction and maintenance projects, including terminology and definitions, materials, design requirements, construction methods, and quality inspection and evaluation. This document applies to the design, construction, and acceptance of eco-friendly thin-layer asphalt concrete (ECA) in new construction and maintenance projects. Main Technical Content: 3. Terminology and Definitions The following terms and definitions apply to this document: 3.1 Ecological Conservation Asphalt Concrete Refers to a green road-building material that aims to reduce asphalt and aggregate consumption, construction energy consumption, and carbon emissions by optimizing aggregate gradation design and selectively incorporating easily compacted additives, reinforcing fibers, and recycled rubber powder. 3.2 Easily Compacted Additive A chemical additive based on emulsification technology that reduces asphalt viscosity and improves the compactibility of asphalt mixtures at low temperatures. 3.3 Cured Modified Rubber Powder A non-desulfurized composite modified rubber particle made from road waste tire rubber powder and rubber reactants through special processing at 100°C. 3.4 Thin Overlays An asphalt mixture overlay with a design thickness of 25–40 mm. 3.5 Ultra-Thin Overlays An asphalt mixture overlay with a design thickness of less than 25 mm. 4. Materials 4.1 General Provisions 4.1.1 All materials shall be sampled and subjected to quality inspection in accordance with JTG F40 after arrival at the site. Only materials that pass the inspection may be used. Supplier-provided inspection reports or commodity inspection reports shall not replace on-site inspections. 4.1.2 Aggregate particle size specifications shall be based on square-hole sieves. Aggregates from different sources, varieties, and specificatio

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