Bridge

Simplifying Concrete Temperature Plans and Expediting Construction Schedules Background As all contractors know, an efficient construction schedule is a cost-saving schedule. However, sometimes unforeseen events can happen, where construction takes longer than expected. That in turn can reduce the chances of meeting project deadlines while extending the budget, which isn’t likely to impress clients. To … Read More

Protecting Reinforcing Steel and Mitigating Freeze-Thaw Damage Background To upgrade the bridges on Highway 9 in British Columbia, Canada, the provincial government made a multimillion dollar investment. For the Popkum Train Overpass Bridge in particular, which was built in the 1950s, this investment would bring it up to modern seismic and safety standards. To ensure … Read More

Strengthening Concrete with CSA- and ASTM-Approved Silica Fume Background The third and current version of Johnson Street Bridge was built at its present location in Victoria, British Columbia, in 1924. A 2009 assessment of the existing bridge identified extensive corrosion to the bridge’s structural beams, obsolete mechanical and electrical systems, and a seismic vulnerability. It … Read More

Background The Coast Meridian Overpass is a 580 m four-lane cable stayed bridge in Port Coquitlam, British Columbia, crossing an active Canadian Pacific rail yard. Construction began in March 2008 and the bridge opened on time to 4 lanes of traffic with lanes for pedestrians and bicycles as well. The design challenge for the bridge … Read More

Background The Golden Ears Bridge, a 1 kilometer (0.62 mile) 6 lane cable stayed bridge, is the largest improvement to the Greater Vancouver Area road system in over 20 years. Construction started in June 2006 and the Golden Ears Bridge connects the communities of Surrey and Langley on the south side of the Fraser River … Read More

Background In 1996, the Tangsan Bridge, which links the 1.4 kilometers (0.87 miles) between Hapchong and Tangsan stations in southwestern Seoul over the Han River, was closed due to safety concerns. During construction of a new bridge, Kryton Korea was contracted to provide Krystol materials for protecting the concrete and to improve its long-term durability and … Read More

Background In 1985 and 1986, thirteen bridges on the newly constructed Coquihalla Highway required waterproofing treatment for the existing concrete infrastructure to protect the reinforcing steel from corrosion. Most of the bridges were constructed and treated during adverse winter weather conditions. Solution The Krystol T1 & T2 Waterproofing System was the only system compatible for wet … Read More

Background The bridge chamber, situated 3 meters (10 feet) below the water table, was constructed out of high quality concrete. It started to have a problem with alkali reactions due to the aggregate in the concrete, and also had leaking problems. A new 30 centimeter (11.8 inch) slab constructed on the original slab also started leaking. Solution … Read More

Background The Cambie Street bridge spans an arm of the Fraser River that separates downtown Vancouver and Vancouver. Shortly after the bridge was constructed, lateral cracks developed full-depth through the deck slab. Extensive water leakage occurred through these cracks during periods of rain. Stopping the water from leaking was a concern for two reasons: the … Read More

Background At one mile long the Coatzacoalcos II Bridge was the longest single-span, cable suspension bridge in the world in 1984. The bridge spans a salt water channel of the Coatzacoalcos River in the Gulf of Mexico. Because of the high humidity, salts and very high levels of pollution in the area, the bridge required … Read More