Joint repairing material and repairing method for wide joint of CRTS II type track plate

The invention relates to the field of new materials, particularly to a joint repairing material and a repairing method for a CRTS II type track plate wide joint. The joint repairing material mainly comprises the following components: cement, fine aggregate, limestone, redispersible polymer emulsion or latex, a water reducing agent, an air entraining agent, a fiber material, a first component, a second component and a third component, wherein the fiber material comprises polyvinyl alcohol fibers and/or polyethylene fibers, the first component is any one selected from fly ash, coal gangue and fly ash-slag composite ultrafine powder, the second component is selected from mineral powder and metakaolin, and the third component is selected from volcanic ash and silica fume. The joint repairing material provided by the embodiment of the invention has the characteristics of quasi-strain hardening behavior and steady-state multi-joint cracking, and the prepared concrete has the characteristicsof high strength and high