The application discloses a UHPC concrete
ditch cover plate and a preparation method thereof, and relates to the technical field of concrete
ditch cover plates. The UHPC concrete
ditch cover plate is prepared from the following raw materials in parts by
mass:
cement 350-380 parts, composite aggregate 450-470 parts, active mineral admixture 120-140 parts, composite
fiber 8-12 parts, core-shell particle 3-5 parts,
carbon nanotube dispersion liquid 0.5-1.5 parts, UHPC special polycarboxylic
acid water reducing agent 5-8 parts,
viscosity stabilizer 0.5-1.5 parts and water 130-145 parts. In the application, silica ash, S95 grade mineral
powder and first-grade
fly ash are compounded according to specific proportions to serve as the active mineral admixture, a cementing
system with gradient hydration and
microstructure optimization is constructed, the matrix has ultralow
porosity and high
toughness, meanwhile, the spherical micro-fine
quartz sand and the broken
basalt mechanism sand are compounded to serve as the composite aggregate, the
viscosity of the mixture is reduced, the forming fluidity is improved, the
bonding strength of the interface between the aggregate and the
slurry is improved, and the interface is prevented from becoming a weak link.