A kind of RPC cover plate of tunnel cable trench and preparation method thereof
A tunnel cable and cover plate technology, applied in the field of building materials, can solve the problems of limiting the use of cable trench RPC cover plates, demanding impermeability requirements, low tensile strength, etc., achieving fewer defects, increased fluidity, and improved strength Effect
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[0044] The preparation method of the tunnel cable trench RPC cover plate in the above-mentioned embodiment comprises the following steps:
[0045] (1) Add cement, mineral powder, fly ash, quartz sand, modified steel fiber, flame retardant, modified rubber particles and osmotic crystallizer into the mixer and mix at a speed of 255r / min for 15 minutes, then Add water reducer and water, stir evenly to get concrete slurry;
[0046] (2) Inject the concrete slurry into the mold, let it stand at room temperature for 5 hours, and then put it into the curing room with a temperature of 20°C and a relative humidity of 95% or more. Steam is introduced and the temperature is raised at a rate of 10°C / h until When the temperature reaches 35°C, take it out after curing for 20 hours, and cool it at room temperature;
[0047] (3) After the specimen is removed from the mold, it is moved into a high-temperature curing room, and the temperature is slowly and uniformly raised to 300°C within 6 hou...
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