A kind of ultra-high performance fiber concrete of C220 strength grade containing coarse aggregate and its preparation method
A technology of fiber-reinforced concrete and strength grades, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc. The effect of the process
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[0052] A kind of preparation method of the ultra-high-performance fiber concrete of the C220 intensity grade that the present invention contains coarse aggregate, comprises the following steps:
[0053] 1) Add 11.5 parts of activator and 2.9 parts of defoamer into water with a total water content of 25% and record it as aqueous solution 1. Disperse 15.5 parts of water reducer and 48 parts of hydroxyl modified carbon nanotubes Liquid and 50 parts of graphene oxide dispersions are added to the water of 50% of total water content, denoted as aqueous solution 2;
[0054] 2) Add 750 parts of fine aggregate (the mass ratio of river sand to quartz sand is 6:4), 900 parts of gravel, 1.7 parts of cellulose fiber and 78 parts of copper-coated microwire steel fiber into the mixer in sequence , stir evenly for 3-5min;
[0055] 3) Then, add 545 parts of cement, 72 parts of fly ash, 65 parts of rice husk ash, and 140 parts of silica fume in sequence, and add the aqueous solution 1 prepared...
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