The 27.7 km (17 mile) Beijing subway tunnel travels underground, from Songjiazhuang, in south Beijing, to Beitaipingzhuang in the north. The route lightens traffic on the city’s north-south axis along the third ring road.
Many cracks in the finished concrete tunnels were actively leaking water and it was feared that the reinforcing steel, tracks, guide cables and equipment were susceptible to deterioration from the moisture.
In 1999, Kryton was contracted to provide the materials to repair cracks and to waterproof existing concrete in the underground tunnels. 16 tons of Kryton materials including Krystol T1, Krystol Bari-cote and Krystol Plug were supplied to waterproof and repair the cracked concrete. To date the materials are working as specified.
Krystol T1 is a surface applied crystalline slurry treatment that transforms new or existing concrete into a permanent waterproofing barrier.
Krystol Bari-Cote is a high-strength crystalline concrete waterproofing top coat used to resurface and repair concrete or masonry.
As part of the Krystol Leak Repair System, Krystol Plug is a rapid-setting hydraulic cement product that when mixed with water is used to stop flowing water and repair leaking cracks, holes and joints in concrete.