33results about How to "Unique fiber cavity structure" patented technology

The invention discloses a C250 strength grade ultra-high performance fiber concrete containing coarse aggregate and a preparation method thereof. The mass parts of the concrete are as follows: 596 parts of cement, 60 parts of water, 870 parts of gravel, and 810 parts of fine aggregate 70 parts of fly ash, 65 parts of rice husk ash, 168 parts of silica fume, 17 parts of water reducer, 12 parts of activator, 1.6 parts of cellulose fiber, 85 parts of steel fiber, 55 parts of hydroxyl modified carbon nanotube dispersion Parts, 58 parts of graphene oxide dispersion liquid, 3.0 parts of defoamer. The prepared concrete has high toughness and durability, and has a high bond strength with the steel, with a compressive strength of 263.81MPa, a flexural strength of 51.49MPa, and a splitting tensile strength of 25.57MPa. The bonding strength reaches 10.76MPa, and the chloride ion impermeability level reaches level VI. Used in steel-concrete composite structures, it can effectively exert the synergistic performance between steel and concrete, make up for the poor bonding performance of steel and concrete, and the inability to give full play to their respective mechanical properties.

The invention discloses a C210 ultra-high-performance fiber concrete containing coarse aggregate and a preparation method thereof. The mass parts of the concrete are as follows: 532 parts of cement, 65 parts of water, 900 parts of crushed stone, fine aggregate 740 parts, 78 parts of fly ash, 70 parts of rice husk ash, 132 parts of silica fume, 15 parts of water reducing agent, 11 parts of activator, 1.7 parts of cellulose fiber, 78 parts of steel fiber, hydroxyl modified carbon nanotube dispersion 45 parts, 49 parts of graphene oxide dispersion, 2.9 parts of defoamer. The prepared concrete has high toughness and durability, and has a high bond strength with the steel, with a compressive strength of 218.75MPa, a flexural strength of 45.98MPa, and a splitting tensile strength of 21.56MPa. The bonding strength reaches 8.72MPa, and the chloride ion impermeability level reaches level VI. Used in steel-concrete composite structures, it can effectively exert the synergistic performance between steel and concrete, make up for the poor bonding performance of steel and concrete, and the inability to give full play to their respective mechanical properties.

The invention discloses a C230 strength class ultra-high-performance fiber concrete containing coarse aggregate and a preparation method thereof. The mass parts of the concrete are as follows: 560 parts of cement, 64 parts of water, 900 parts of gravel, and 780 parts of fine aggregate 75 parts of fly ash, 63 parts of rice husk ash, 145 parts of silica fume, 16 parts of water reducing agent, 11 parts of activator, 1.7 parts of cellulose fiber, 78 parts of steel fiber, 50 parts of hydroxyl modified carbon nanotube dispersion Parts, 52 parts of graphene oxide dispersion liquid, 2.9 parts of defoamer. The prepared concrete has high toughness and durability, and has a high bond strength with the steel, with a compressive strength of 235.48MPa, a flexural strength of 48.23MPa, and a splitting tensile strength of 22.95MPa. The bonding strength reaches 9.24MPa, and the chloride ion impermeability level reaches level VI. Used in steel-concrete composite structures, it can effectively exert the synergistic performance between steel and concrete, make up for the poor bonding performance of steel and concrete, and the inability to give full play to their respective mechanical properties.

The invention discloses a C240 ​​strength class ultra-high-performance fiber concrete containing coarse aggregate and a preparation method thereof. The mass parts of the concrete are as follows: 578 parts of cement, 62 parts of water, 880 parts of crushed stone, and 800 parts of fine aggregate 70 parts of fly ash, 60 parts of rice husk ash, 154 parts of silica fume, 16.5 parts of water reducing agent, 11.5 parts of activator, 1.7 parts of cellulose fiber, 90 parts of steel fiber, 51 parts of hydroxyl modified carbon nanotube dispersion Parts, 54 parts of graphene oxide dispersion liquid, 2.9 parts of defoamer. The prepared concrete has high toughness and durability, and has a high bond strength with the steel, with a compressive strength of 249.65MPa, a flexural strength of 50.88MPa, and a splitting tensile strength of 24.78MPa. The bonding strength reaches 10.54MPa, and the chloride ion impermeability level reaches level VI. Used in steel-concrete composite structures, it can effectively exert the synergistic performance between steel and concrete, make up for the poor bonding performance of steel and concrete, and the inability to give full play to their respective mechanical properties.

The invention discloses a high-performance fiber concrete of C140 strength grade and a preparation method thereof. The mass parts of the concrete are as follows: 465-480 parts of cement, 100-110 parts of water, 730-760 parts of river sand, and 1000 parts of gravel ‑1050 parts, 55‑95 parts of fly ash, 55‑75 parts of rice husk ash, 55‑75 parts of silica fume, 13‑14.5 parts of water reducing agent, 15‑15.5 parts of activator, 1.1‑1.8 parts of cellulose fiber, Hydroxyl-modified carbon nanotube dispersion liquid 30-33 parts, defoamer 2.4-2.5 parts. The prepared concrete has high toughness and excellent durability, and has a high bonding strength with the steel. Its flexural strength is not less than 30.68MPa, the 28d cubic compressive strength is not less than 142.36MPa, and the splitting tensile strength is not less than 12.31MPa, the bonding strength with the steel is not less than 6.04MPa, the unsteady chloride ion migration coefficient D RCM Not larger than 16×10 ‑14 m 2 / s. Used in steel-concrete composite structures, it can effectively exert the synergistic performance between steel and concrete, make up for the poor bonding performance of steel and concrete, and the inability to give full play to their respective mechanical properties.