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

Coarse-aggregate-containing C240-strength-grade ultrahigh-performance fiber concrete and preparation method

The invention discloses coarse-aggregate-containing C240-strength-grade ultrahigh-performance fiber concrete and a preparation method. The concrete is composed of, by mass, 578 parts of cement, 62 parts of water, 880 parts of rubble, 800 parts of fine aggregate, 70 parts of coal ash, 60 parts of rice husk ash, 154 parts of silicon ash, 16.5 parts of water reducer, 11.5 parts of excitant, 1.7 parts of cellulosic fiber, 90 parts of steel fiber, 51 parts of hydroxyl modified carbon nanotube dispersion, 54 parts of oxidized graphene dispersion and 2.9 parts of defoamer. The concrete prepared by the method has high toughness and durability and has high binding strength with section steel, compressive strength reaches 249.65MPa, bending strength reaches 50.88MPa, splitting tensile strength reaches 24.78MPa, the binding strength with the section steel reaches 10.54MPa, and chlorion anti-permeation grade reaches VI grade. When the concrete is used in a section steel and concrete combined structure, cooperative working performance between the section steel and the concrete can be brought into play effectively, and the defects that the section steel and the concrete are poor in binding performance and respective mechanical performance of the section steel and the concrete cannot be brought into full play are made up.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness and high-cohesiveness C250 ultrahigh-strength hybrid fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C250 ultrahigh-strength hybrid fiber concrete and a preparation method thereof. The ultrahigh-strength hybrid fiber concrete is prepared from cement, sand, gravel, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fibers, basalt fibers, CaCO3 whiskers, a carboxyl modified polyvinyl alcohol polymer and nano titanium / graphene oxide dispersion liquid according to the mixing ratio of (550-560): (760-770): (830-840): (65-70): (103- 108): (125-135): (5.4-5.6): (70-75): (20-21): (16-17): (3-3.3): (14.5-15): (7.5-8): (13.3-13.6): (21-21.5): (22-23.5): (42-46). The materials are evenly mixed at intervals through a layered stirring method, and discharging, forming and curing are conducted. The mechanical property and durability of the concrete and the bonding property between the concrete and the profile steel are obviously improved.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness and high-cohesiveness C130-strength high-strength fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C130-strength high-strength fiber concrete and a preparation method thereof. The concrete is prepared from cement, sand, gravel, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fibers, basalt fibers, CaCO3 whiskers and a carboxyl modified polyvinyl alcohol polymer according to the mixing ratio of (425-430): 718: 985: (80-85): (60-65): (30-35): (3.5-4.2): (120- 125): (12-13): (13-14): (1.9-2.3): (10-11): (5.4-5.6): (9-9.4): (17.8- 18.1): (20-22). The materials are evenly mixed at intervals through a layered stirring method, and discharging, forming and curing are conducted. The fracture resistance, the compression resistance, the bonding strength with the profile steel and the impermeability of the concrete are remarkably enhanced, and the cooperative work capacity with the profile steel is further improved.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness and high-cohesiveness C150-strength ultrahigh-strength fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C150-strength ultrahigh-strength fiber concrete and a preparation method thereof. The ultrahigh-strength fiber concrete is prepared from cement, sand, gravel, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fibers, basalt fibers, hydroxyl modified single-walled carbon nanotube dispersion liquid and a carboxyl modified polyvinyl alcohol polymer according to the mixing ratio of (460-470): (710-720): 985: (75-85): (65-70): (40-45): (3.8-4.4): (105-110): (14-16): (12-13): (2.2-2.6): (11-12): (5.5-5.7): (9.8-10.2): (25-30): (16.5-18). The materials are evenly mixed at intervals through a layered stirring method, and discharging, forming and curing are conducted. The concrete mechanics including the profile steel bonding performance and the durability are remarkably improved, and the cooperative work capacity with the profile steel is enhanced.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness and high-cohesiveness C80-strength fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C80-strength fiber concrete and a preparation method thereof. The concrete is prepared from cement, river sand, broken stone, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fibers, basalt fibers and CaCO3 crystal whiskers according to the mixing ratio of (360-370): 725: 1007: (100-110): (55-65): (17-19): (2.5-4): (150-155): (8.5-9.5): (12.5-13.5): (1.8-2.1): (7.8-8.2): (4.9-5.2): (8.1-8.3): (17.4-17.6). Through a layered stirring method, all the materials are uniformly mixed at intervals, and discharging, forming and curing are performed. The compression resistance, the fracture resistance, the splitting tensile strength, the toughness, the durability and the like of the concrete can be effectively improved, and the bonding strength and the cooperative deformation capacity between the concrete and the profile steel are enhanced.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness high-cohesiveness C70 strength fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C70 strength fiber concrete and a preparation method thereof. The concrete is prepared from cement, river sand, broken stone, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fiber, basalt fiber and CaCO3 whisker according to the mixing ratios of (350 to 360): (723): (1010): (105 to 112): (45 to 55): (14 to 17): (2 to 3.5): (155 to 160): (7.5 to 8.5): (12 to 13): (1.8 to 2.1): (6.8 to 7.8): (4.7 to 4.9): (7.9 to 8.1): (17.3 to 17.5). Through a layered stirring method, all the materials are uniformly mixed at intervals, and discharging, forming and curing are performed. The compression resistance, the fracture resistance, the splitting tensile strength, the toughness, the durability and the like of the concrete can be effectively improved, and the bonding strength and the cooperative deformation capacity between the concrete and profile steel are enhanced.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness and high-cohesiveness C60 strength fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C60 strength fiber concrete and a preparation method thereof. The concrete is prepared from cement, river sand, broken stone, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fibers, basalt fibers and CaCO3 whiskers according to the mixing ratio of (340-350): 719: 1015: (108-115): (40-50): (13-16): (1.5-3): (160-165): (6.5-7.5): (11.5-12.5): (1.6-2): (5.8-6.8): (4.5-4.7): (7.8-8): (17.1-17.4). Through a layered stirring method, all the materials are uniformly mixed at intervals, and discharging, forming and curing are performed. The compression resistance, the fracture resistance, the splitting tensile strength, the toughness, the durability and the like of the concrete can be effectively improved, and the bonding strength and the cooperative deformation capacity between the concrete and the profile steel are enhanced.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness and high-cohesiveness C210 ultrahigh-strength hybrid fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C210 ultrahigh-strength hybrid fiber concrete and a preparation method thereof. The ultrahigh-strength hybrid fiber concrete is prepared from cement, sand, gravel, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fibers, basalt fibers, CaCO3 whiskers, a carboxyl modified polyvinyl alcohol polymer andnanometer titanium / graphene oxide dispersion liquid according to the mixing ratio of (525-535):(735-740):(890-900): (70-80): (85-95:(95-100):(4.7-5):(90-95):(17-18):(14.5-15):(2.5-2.9) :(12-13):(6.5-6.7):(12.2-12.5):(19-19.3):(20.5-22):(33-36). The materials are uniformly mixed by a layered stirring method, and are prepared and maintained. The mechanical property of the concrete and the bonding property and durability between the concrete and the profile steel are obviously improved.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness and high-cohesiveness C180 ultrahigh-strength fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C180 ultrahigh-strength fiber concrete and a preparation method thereof. The high-toughness and high-cohesiveness C180 ultrahigh-strength fiber concrete is prepared from cement, sand, gravel, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fibers, basalt fibers, hydroxyl modified single-walled carbon nanotube dispersion liquid and a carboxyl modified polyvinyl alcohol polymer according to the mixing ratio of (490-496): (710-725): 970: (68-72): (75-77): (60-67): (4.3-4.5): (92-97): (16-17): (13.5-14): (2.4-2.8): (13.5-14.5): (5.9-6.2): (10.7-11): (29.5-32): (19-21). The materials are evenly mixed at intervals through a layered stirring method, and discharging, forming and curing are conducted. The mechanical property of the concrete and the bonding property and durability of the concrete and the profile steel are remarkably improved, and the cooperative working capacity of the concrete and the profile steel is enhanced.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness and high-cohesiveness C50-strength fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C50-strength fiber concrete and a preparation method thereof. The concrete is prepared from cement, river sand, broken stone, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fibers, basalt fibers and CaCO3 whiskers according to the mixing ratio of (330-340): 715: 1020: (110-125): (30-40): (10-14): (1-3): (170-180): (5.5-6.5): (11-12): (1.5-1.8): (5.5-6): (4.5-4.6): (7.8-7.9): (17-17.3). Through a layered stirring method, all the materials are uniformly mixed at intervals, and discharging, forming and curing are performed. The compression resistance, the fracture resistance, the splitting tensile strength, the toughness, the durability and the like of the concrete can be effectively improved, and the bonding strength and the cooperative deformation capacity between the concrete and the profile steel are enhanced.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness and high-cohesiveness C110-strength high-strength fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C110-strength high-strength fiber concrete and a preparation method thereof. The concrete comprises the following components: cement, sand, broken stone, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fibers, basalt fibers, CaCO3 whiskers and a carboxyl modified polyvinyl alcohol polymer in a mixing ratio of (405-415): 713: 995: (85-90): (45-55): (20-25): (3-4): (125-130): (11-12): (12-13): (1.8-2.1): (9-9.5): (5.2-5.4): (8.7-8.9): (17.6-17.8): (18-20). The materials are evenly mixed at intervals through a layered stirring method, and discharging, forming and curing are conducted. The fracture resistance, the compression resistance, the bonding strength with the profile steel and the impermeability of the concrete are all remarkably enhanced, and the cooperative work capacity with the profile steel is further improved.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness and high-cohesiveness C90-strength fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C90 strength fiber concrete and a preparation method thereof. The concrete is prepared from cement, river sand, broken stone, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fibers, basalt fibers and CaCO3 crystal whiskers according to the mixing ratio of (370-380): 728: 1004: (90-100): (65-75): (19-22): (2.8-4): (140-150): (10-11.5): (13-14): (2-2.3): (8.2-8.8): (5-5.2): (8.2-8.4): (17.5-17.7). Through a layered stirring method, all the materials are uniformly mixed at intervals, and discharging, forming and curing are performed. The compression resistance, the fracture resistance, the splitting tensile strength, the toughness, the durability and the like of the concrete can be effectively improved, and the bonding strength and the cooperative deformation capacity between the concrete and the profile steel are enhanced.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness and high-cohesiveness C120-strength high-strength fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C120-strength high-strength fiber concrete and a preparation method thereof. The concrete is prepared from cement, sand, gravel, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fiber, basalt fiber, CaCO3 whisker and carboxyl modified polyvinyl alcohol polymer according to mixing ratios of (415 to 425) to (715 to 999) to (85 to 90) to (55 to 65) to (25 to 30) to (3.2 to 4.2) to (125 to 130) to (11 to 12.5) to (13 to 13.5) to (1.9 to 2.2) to (9 to 10) to (5.3 to 5.5) to (8.9 to 9.1) to (17.7 to 18) to (19 to 21). The materials are evenly mixed at intervals through a layered stirring method, and discharging, forming and curing are conducted. The mechanical property of the concrete and the adhesive property and anti-permeability between the concrete and profile steel are all remarkably enhanced, and the cooperative work capacity of the concrete and the profile steel is improved.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness and high-cohesiveness C170-strength ultrahigh-strength fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C170-strength ultrahigh-strength fiber concrete and a preparation method thereof. The concrete is prepared from cement, sand, gravel, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fibers, basalt fibers, hydroxyl modified single-walled carbon nanotube dispersion liquid and a carboxyl modified polyvinyl alcohol polymer according to the mixing ratio of (480-490): (715-725): 975: (70-75): (70-75): (55-60): (4.2-4.4): (95-100): (15-17): (13.5-14): (2.4-2.8): (13-14): (5.7-6): (10.4-10.7): (28-32): (18-20). The materials are evenly mixed at intervals through a layered stirring method, and discharging, forming and curing are conducted. The concrete mechanics including the structural steel bonding performance and the durability are remarkably improved, and the cooperative work capacity of the concrete and the structural steel is enhanced.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

A kind of C240 ​​strength grade ultra-high performance fiber concrete containing coarse aggregate and preparation method thereof

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.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

A kind of high-performance fiber concrete of C90 strength grade and preparation method thereof

The invention discloses a high-performance fiber concrete of C90 strength grade and a preparation method thereof. The mass parts of the concrete are as follows: 385-410 parts of cement, 120-135 parts of water, 700-720 parts of river sand, and 1020 parts of gravel ‑1050 parts, 85‑105 parts of fly ash, 45‑75 parts of rice husk ash, 7‑8 parts of water reducing agent, 11‑13 parts of activator, 1.1‑1.8 parts of cellulose fiber, 28 parts of carboxylated styrene-butadiene polymer 30 parts, 14-16 parts of hydroxyl-modified carbon nanotube dispersion, 2.0-2.1 parts of defoamer. The prepared concrete has high toughness and excellent durability, and has a high bond strength with the section steel. Its 28d cubic compressive strength is not less than 93.28MPa, its splitting tensile strength is not less than 8.37MPa, and its flexural strength is not less than 21.19MPa, the bonding strength with the steel is not less than 4.59MPa, 28d unsteady chloride ion migration coefficient D RCM Not greater than 46×10 ‑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.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness and high-cohesiveness C200 ultrahigh-strength fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C200 ultrahigh-strength fiber concrete and a preparation method thereof. The ultrahigh-strength fiber concrete is prepared from cement, sand, gravel, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fibers, basalt fibers, hydroxyl modified single-walled carbon nanotube dispersion liquid and a carboxyl modified polyvinyl alcohol polymer according to the mixing ratio of (507-518): (720-730): 945: (60-68): (80-90): (70-78): (4.6-4.8): (85-90): (16.8-18): (14.5-15): (2.5-2.9): (14.5-15): (6.2-6.4): (11.3-11.5): (31-32): (20.5-21.5). The materials are uniformly mixed at intervals through a layered stirring method, and preparation and maintenance are performed. The mechanical property, the bonding property with the profile steel, the cooperative working capacity and the durability of the concrete are all remarkably improved.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness and high-cohesiveness C140-strength high-strength fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C140-strength high-strength fiber concrete and a preparation method thereof. The high-strength fiber concrete is prepared from cement, sand, gravel, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fibers, basalt fibers, a CaCO3 whisker and a carboxyl modified polyvinyl alcohol polymer according to the mixing ratio of (430-435): 720: 980: (80-85): (65-70): (35-40): (3.7-4.3): (115-120): (13-14): (13.5-14): (2-2.4): (10-11): (5.5-5.7): (9.3-9.6): (17.9-18.2): (21-23). The materials are evenly mixed at intervals through a layered stirring method, and discharging, forming and curing are conducted. The mechanical property of the concrete and the adhesive property and anti-permeability between the concrete and the profile steel are remarkably enhanced, and the cooperative work capacity of the concrete and the profile steel is further improved.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness and high-cohesiveness C230 ultrahigh-strength hybrid fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C230 ultrahigh-strength hybrid fiber concrete and a preparation method thereof. The high-toughness and high-cohesiveness C230 ultrahigh-strength hybrid fiber concrete is prepared from cement, sand, gravel, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fibers, basalt fibers, CaCO3 whiskers, a carboxyl modified polyvinyl alcohol polymer and nano titanium / graphene oxide dispersion liquid according to the mixing ratio of (540-545): (740-745): (870-880): (70-75): (95-100): (110-115): (5-5.2): (78-82): (18-19): (15.5-16): (2.6-3): (13-14): (7-7.2): (12.7-13): (19.5-19.7): (21-22): (39-42). The preparation method comprises the steps of uniformly mixing the materials by a layered stirring method, discharging, forming and curing. The concrete mechanics including the bonding performance and the durability between the profile steels are obviously improved.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness high-cohesiveness C220 ultrahigh-strength hybrid fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C220 ultrahigh-strength hybrid fiber concrete and a preparation method thereof. The high-toughness and high-cohesiveness C220 ultrahigh-strength hybrid fiber concrete is prepared from cement, sand, gravel, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fiber, basalt fiber, CaCO3 whisker, carboxyl modified polyvinyl alcohol polymer and nano titanium / graphene oxide dispersion liquid according to the mixing ratios of (535-540): (735-740): (880-890): (70-75): (90-100): (100-105): (4.8-5): (85-90): (17.5-18.5): (15-15.5): (2.6-3): (12-13): (6.7-7): (12.5-12.7): (19.2-19.5): (21-22): (36-39); and the materials are uniformly mixed by a layered stirring method, and preparation and curing are performed. The mechanical property and durability of the concrete and the bonding property between the concrete and profile steel are obviously improved.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

High-toughness high-cohesiveness C160-strength ultrahigh-strength fiber concrete and preparation method thereof

The invention discloses high-toughness and high-cohesiveness C160-strength ultrahigh-strength fiber concrete and a preparation method thereof. The concrete is prepared from cement, sand, broken stone, coal ash, straw ash, silica fume, nano silicon, water, exciting agent, defoaming agent, shrinkage reducing agent, ramie fiber, basalt fiber, hydroxyl modified single-walled carbon nanotube dispersion liquid and carboxyl modified polyvinyl alcohol polymer according to the mixing ratios of (470-480):(710-720):980:(75-80):(70-75): (45-55):(4-4.4):(100-105):(14-16):(13-13.5):(2.3-2.6):(12-13):(5.6-5.8):(10.2-10.4):(27-31):(17-19). The materials are evenly mixed at intervals through a layered stirring method, and discharging, forming and curing are conducted. The mechanic performance of the concrete, including the structural steel bonding performance and the durability, is remarkably improved, and the cooperative work capacity of the concrete and structural steel is enhanced.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

A kind of high-performance fiber concrete of c140 strength grade and preparation method thereof

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.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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