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A expansion joint, or movement joint, is an assembly designed to hold parts together while safely absorbing temperature-induced expansion and contraction of building materials. They are commonly found between sections of buildings , bridges , sidewalks , railway tracks , piping systems , ships , and other structures.
A concrete pavement composed of multiple slabs of uniform size will produce a periodic sound and vibration in each vehicle as its tires pass over each expansion joint. These monotonous repeated sounds and vibrations can cause a fatiguing or hypnotic effect upon the driver over the course of a long journey.
Construction programs of Rubber Bridge Expansion Joints: (1) Set out and cut Modular Bridge Expansion Joint. (2) Excavate and clean the Modular Bridge Expansion Joint area. (3) Drill holes to locate the anchor bolts. (4) Place the rebar mat and mold. (5) Pour bottom concrete layer. (6) Install comb-shaped steel plate. (7) Pour side concrete. (8 ...
The omission of the expansion joint removes a significant maintenance and durability issue, as it serves as a point of ingress for road salts which allows the abutment, piers and deck soffit concrete to come under chloride attack that can cause degradation and eventual span failure. A 1989 British study showed that the majority of expansion ...
Mageba (stylised as mageba) is a civil engineering service provider [1] and manufacturer of bridge bearings, expansion joints, seismic protection and structural monitoring devices for the construction industry. [2] The company is headquartered in Bulach, Switzerland, and operates through offices in Europe, Americas and Asia Pacific. [3]
The caulking filler is used to prevent backfill material from flowing into the joint or crack. Non-shrink concrete backfill material that is tested as rapid set concrete patching materials is recommended for use on DBR projects. First, make two saw cuts in the pavement to outline the longitudinal sides of each dowel bar slot.
In highly variable climates which undergo multiple freeze-thaw cycles, concrete blocks will be formed with separations, called expansion joints, to allow for thermal expansion without breakage. The use of expansion joints in sidewalks may not be necessary, as the concrete will shrink while setting. [30]
Dowel bar retrofit (DBR) is a process that re-establishes load transfer capability on joints and cracks by installing epoxy-coated, round steel dowels into existing concrete pavement across transverse joints and/or cracks. Slots are cut using diamond-tipped saw blades; the existing concrete is removed and the dowels are placed in the slots ...
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