Asphalt Deck Pavement Design for Concrete Bridge under Frost Climate in the North Sea Region

Abstract

A prefered waterproofing system and bearing course mixtures for asphalt pavement deck were designed to determine a suitable waterproofing system and material/structure combination optimize proposal for Qingdao Bay Bridge, which was built under the frost climate of Shandong province, through a general analysis on the disease type and the damage mechanism of asphalt deck pavement. Based on the laboratory test results, the test section construction and long-term pavement performance observation, a comprehensive comparison and analysis about five types of waterproofing system(Synchronous Seal coat+ Asphalt Sand, Polymer Modified Bituminous Waterproofing Sheets, Priming Coat+Asphalt Rubber Membrance+Protection Board, Polymer Modified Emulsified Asphalt Waterproof coating, Gussasphalt)were made in terms of waterproof effect, workability, quality reliability and long-term performance. Furthermore, the asphalt deck pavement were proposed to be designed on the basis of the layer performance-related concept, and regarded as the system engineering. The construction effect indicates that both the multi-purpose layer (waterproofing high modulus asphalt sand) and the deck pavement structure are adapted to the evidence temperature difference and windy characteristics during the construction. It also shows the excellent workability and quality reliability.