High-toughness and high-cohesiveness C250 ultrahigh-strength hybrid fiber concrete and preparation method thereof
A technology with high cohesiveness and mixed fibers, which is applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc. conjunctive effect
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Embodiment 1
[0103] 1) Add 21 parts by mass of water-reducing agent and 43 parts by mass of nano-titanium / graphene oxide dispersion into two-thirds of the total water, which is recorded as mixed solution 1; 14.5 parts of shrinkage reducing agent and 3.2 parts of antifoaming agent are added to the water of one-third of the total water volume, which is recorded as mixed solution 2; 22.4 parts of carboxy-modified polyvinyl alcohol polymers are prepared for later use; the total water volume is 70 parts; Among them, the nano-titanium / graphene oxide dispersion is composed of 1.8 graphene oxide powder and 0.5 parts of nano-TiO 2 Made; carboxy-modified polyvinyl alcohol polymer is prepared from raw materials according to mass percentage: carboxy-modified polyvinyl alcohol 38.5%, water 60.4%, polyacrylate defoamer 1.1%;
[0104] 2) Mix 7.5 parts of ramie fiber, 830 parts of gravel, 765 parts of sand, 555 parts of cement, 65 parts of fly ash, 105 parts of straw ash, 130 parts of silica fume, 5.6 par...
Embodiment 2
[0113] 1) Add 20.5 parts by mass of water reducing agent and 44 parts by mass of nano-titanium / graphene oxide dispersion into two-thirds of the total water, which is recorded as mixed solution 1; 14.7 parts of shrinkage reducing agent and 3.3 parts of antifoaming agent are added to the water of one-third of the total water volume, which is recorded as mixed solution 2; 22.8 parts of carboxy-modified polyvinyl alcohol polymers are prepared for later use; the total water volume is 70 parts; Among them, the nano-titanium / graphene oxide dispersion consists of 1.3 parts of graphene oxide powder and 0.5 parts of nano-TiO 2 Made; carboxy-modified polyvinyl alcohol polymer is prepared from raw materials according to mass percentage: carboxy-modified polyvinyl alcohol 39%, water 60%, polyacrylate defoamer 1%;
[0114] 2) 8 parts of ramie fiber, 830 parts of gravel, 770 parts of sand, 550 parts of cement, 67 parts of fly ash, 105 parts of straw ash, 125 parts of silica fume, 5.5 parts o...
Embodiment 3
[0122] 1) Add 21 parts by mass of water-reducing agent and 46 parts by mass of nano-titanium / graphene oxide dispersion into two-thirds of the total water, which is recorded as mixed solution 1; 15 parts of shrinkage reducing agent and 3 parts of antifoaming agent are added to the water of one-third of the total water volume, which is recorded as mixed solution 2; 22 parts of carboxyl-modified polyvinyl alcohol polymers are prepared for later use; the total water volume is 73 parts; Among them, the nano-titanium / graphene oxide dispersion is composed of 1.8 parts of graphene oxide powder and 0.4 parts of nano-TiO 2 Made; carboxy-modified polyvinyl alcohol polymer is prepared from raw materials according to mass percentage: carboxy-modified polyvinyl alcohol 36.7%, water 62%, polyacrylate defoamer 1.3%;
[0123] 2) Mix 7.8 parts of ramie fiber, 835 parts of gravel, 770 parts of sand, 555 parts of cement, 70 parts of fly ash, 103 parts of straw ash, 135 parts of silica fume, 5.5 p...
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