Three Gorges Dam

The Three Gorges Dam is a strategic hydraulic engineering for flood control, power generation and shipping in China. The permanent navigation lock is a vitally important engineering for construction of Three Gorges Dam with worldclass scale and design head. Moreover, the underground conveyance system is a key part for the permanent navigation lock. Ultimately JM-PCA superplasticizer and JM-II set-retarding and water-reducing admixture, manufactured by Bote company, was selected to be applied in the system after rigorous experiments. JM-PCA features outstanding water-reducing and reinforcing performance . Concrete that uses JM-PCA has excellent placeability, less bleeding rate, no slump loss and satisfying sthength and durability, all of which assure the speed and quality of the construction of underground conveyance system in the permanent navigation lock.

The Hangzhou Bay Highway Bridge

The Hangzhou Bay Highway Bridge, one of the national key project, which is 36 Killometers long and whose investment is 12 billion yuan, is listed the first of the homogeneous type in the world for its span and construction scale. Because the bridge is under the ocean enviroment and designed lifetime is as many as one hundred years. Therefore the high choloride impermieability, volume stability, anti-cracking and low hydration heat of concrete are required.. After a series of experiments and comparison with other brand of admixtures, JM-PCA was applied and met the techical requiremnet of the concrete in the upper structure of the bridge.

Nanjing Xuanwu Lake Tunnel

Xuanwu Lake Tunnel is a vital part of in road network in Nanjing and its consumption of concrete is approximately 260,000 m3. After multidimensional testing, our second-generation JM-VIII set-retading and water-reducing admixture is picked out finally. JM-III features small dosage(only 6-8% of cement consumption), outstanding crack resistance, high anti-seepage high water reducing performance, moderate hardening time, good slump retention and placeability,etc.

Nanjing Subway is in the list of national key infrastructure projects. JM-VIII set-retarding and water-reducing admixture was used in Nanjing Subway in great quantities. JM-VIII features outstanding placeability, strong adaptability and good set-ratarding effects, with the water reducing rate up to 22£¥ and almost no slump loss for 2h. Moreover, the compression strength(28d) can increase by 40% compared with that of reference concrete.