Hangzhou Bay Bridge & Sutong Bridge open to traffic

Nowadays, Hangzhou Bay Bridge and Sutong Bridge have been officially opened to traffic. These two bridges are the milestones in the bridge construction history in China, which emblematizes that China has leaped from "large country in bridge construction" to "strong country in bridge construction". During this forward leap, Baosteel has acted as an important role, not only supplied all steel for high-difficulty inclined cable stays for Sutong Birdge, but also supplied the green slag powder for Hangzhou Bay Bridge.

Accompanying with these two bridges, whose designed life is over 100 years, opening to traffic, Baosteel's steel products will also endure the test by wind and rain for over 100 years.

As the main span of Sutong Bridge is 1088 meters, it is the largest span inclined cable bridge in the world till now and is praised as "the Cable-Stayed Bridge representing the highest construction technology in the world" by international bridge engineering circles. On the bridge, over 6500 tons of galvanized steel wires produced by Baosteel have been braided into 272 pieces of inclined cable stays, which has supported the "ridge pole" of the Bridge.

As the most important load-bearing member of the cable-stayed bridge, each is inclined cable stay is braided by hundreds of galvanized steel wires. The capability of resisting the fatigue, breakage, tensile and bending is subject to the performance of steel wires.

As the full length of Hangzhou Bay Bridge is 36km, it is the longest sea-crossing bridge in the world at present and is also one of the most-difficult-constructed sea-crossin bridges in the world. As the Bridge locates in the strong corrosive marine environment, in order to insure the lifetime of the Bridge will be longer than 100 years, Baosteel and Chinese scientific research colleges, together, have researched and developed the high-performance admixture slag powder special-purposed for marine concrete which has filled in the blank in China, and have been used to cast the piers of Hangzhou Bay Bridge in batches. The application has improved the density of concrete material, formed the concrete structure with low penetration, high dense and less defects and advanced the corrosion resisting capability of concrete structure radically, all of which has piled the strong "base" for Hangzhou Bay Bridge the "horizontal dragon" on the sea.