The invention discloses an
engineered cementitious composite (ECC) repairing material comprising the following components:
cement,
coal ash,
quartz sand, water, a
water reducer, an early strength additive and
polyvinyl alcohol fiber. All the components are stirred and mixed according to a certain sequence to obtain the ECC repairing material disclosed by the invention. Due to the addition of a great deal of cheap
coal ash in raw materials, on one hand, the strength of a substrate material can be weakened and the high
ductility of the material is ensured, and on the other hand, the price of the
coal ash is far lower than that of an artificial defect material; the ECC repairing material has higher
compressive strength and bending strength than a common ECC material; and meanwhile, a proper amount of early strength additive is added, the strength of the material used for seven days can be up to 80% of the final strength, and compared with the traditional engineered
fiber reinforced
cementitious composite material, the ECC repairing material has the advantages that the maintenance time is shortened, the material can be desterilized as soon as possible, and the material meets the general
engineering requirement on the aspect of time. Therefore, the ECC repairing material has a favorable
engineering application value.