The present invention provides a construction method for arranging an expansion joint on an upper surface of a bridge or structure spaced apart by a predetermined gap, comprising: a first step of cleaning the upper surface and applying a primer; A second step of sequentially installing a first perforated pipe and a backup material in the gap; Coating an elastic sealing material and sequentially installing a rubber support plate and a carbon fiber pad, or sequentially installing a rubber support plate and a carbon fiber pad and coating the elastic sealing material on the upper part of the gap and on the cut portion of the bridge or the structure A third step including; And a fourth step of applying a finish coating between the cut portion and the adjacent upper surface after completion of the third step, thereby increasing the structural strength of the structure to increase durability and increase the tensile strength to reflect The present invention relates to an expansion joint of a bridge or structure using an elastic sealing material and carbon fiber that suppresses cracks and eventually prevents the occurrence of portholes, and a construction method using the same.
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