The invention relates to superfine quick-setting self-compacting repair
mortar material and a preparation method thereof; the superfine quick-setting self-compacting repair
mortar material is characterized by being prepared from, by total weight of the materials, 35.0-55.0% of quick-hardening early strength
cement, 35.0-55.0% of fine aggregate, 3.0-10.0% of a mineral admixture, 2.5-5.0% of an excitant, 0.80-2.00% of redispersible latex
powder, 0.25-0.50% of a water-
reducing agent, 0.25-0.50% of a thickening
time control agent, and 0.01-0.05% of a defoaming agent. The preparation method comprises: weighing the materials to a proportion, and mixing well in a mixing
machine. The superfine quick-setting self-compacting repair
mortar material has good
constructability, is up to 330 mm in initial mobility, has initial
setting time of < / =20 min and final
setting time of < / =30 min, is up to 33.0 MPa and 50.0 MPa in 6 h
compressive strength and 24 h
compressive strength, has stably increasing late strength, is up to 4.0 MPa and 6.0 MPa in 1 d and 3 d interfacial flexural-tensile strength of concrete interface, has the advantages of micro-expansion effect and good construction operational simplicity, and is suitable for the quick repair of housing and roads, particularly for the repair of concrete fracture surfaces and damaged rail plates of high-speed railway ballastless tracks.