GongLuZhan using new materials polymer fast near the bridge expansion joint 2 hours repairing maintenance open traffic quick fixes

Polymer structure of rapid repairing materials polymer structure of rapid repair materials quickly opened the summer will come, bridge pavement structure due to temperature change is big, large vehicles by reasons are prone to damage, etc. GongLuZhan moved to prevent beam is too large, produce the beam deformation, damage to the bridge expansion joint of maintenance as a focus of recent work.     Recruiting station bridge engineers patrol found prefecture jurisdiction S252 Kan mountain bridge, bridge G310 industrial park, G310 beijing-fuzhou deck bridge had seven meters, 6 meters and 8 meters long expansion joints of concrete damage is 0. 3 bridge is located in the main trunk line, the traffic flow is big, if the use of ordinary cement concrete, due to the solidification period and maintenance period is longer, about 20 days, a lot of influence on transportation. To protect traffic generated, rapid construction using the current domestic most advanced polymer structure repair material ( XB） , in charge of the leadership on the ground instruction, elite team of maintenance and minor repairs to the bridge expansion joint of cement concrete to break repair damaged parts.     In terms of technological process, the site maintenance engineer will clear broken bridge expansion joint and material preparation, crushed stone weighing, mixture premixed, simultaneous add water mixing, vibrating compaction mixture into mould, leveling plaster, sprinkler cover health open to traffic in more than two hours, to ensure the safety of the highway in without hidden trouble.     Polymer structure of fast repair material is a kind of special box type cement mixture, designed for repair and rapid construction research, main characteristic is to condense sclerosis is fast, hours of high intensity, the so-called 'hours cement'. High early strength, strong cohesive force, 2 times that of ordinary cement, the cement setting time can use according to the needs of construction of retarding the seam an agent, usually 1 hour to compressive strength of 30 mpa, high compressive flexural strength, the late of 80 mpa, respectively is 15 mpa, does not damage the structure of metal component after 1 hour can be open to traffic, up to 80 mpa, respectively is 15 mpa, not damage of structures, 1 hour after the casting can be open to traffic.