A kind of C250 strength grade ultra-high performance fiber concrete containing coarse aggregate and its preparation method
A fiber reinforced concrete, strength grade technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of limitation, poor resistance to deformation, etc. Effects of Fracture Toughness and Deformability
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[0052] A kind of preparation method of the C250 intensity grade ultra-high performance fiber concrete containing coarse aggregate of the present invention, comprises the following steps:
[0053] 1) Add 12 parts of activator and 3.0 parts of antifoaming agent into 25% water of the total water amount in parts by mass, which is recorded as aqueous solution 1, and 17 parts of water reducer, 55 parts of hydroxyl modified carbon nanotubes Dispersion liquid and 58 parts of graphene oxide dispersion liquids are added in the 50% aqueous solution of total water, denoted as aqueous solution 2;
[0054] 2) Add 810 parts of fine aggregate (the mass ratio of river sand to quartz sand is 6:4), 870 parts of gravel, 1.6 parts of cellulose fiber and 85 parts of copper-coated microwire steel fiber into the mixer in sequence , stir evenly for 3-5min;
[0055] 3) Then, add 596 parts of cement, 70 parts of fly ash, 65 parts of rice husk ash, and 168 parts of silica fume in sequence, then add the ...
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