64results about How to "Play the role of "internal maintenance"" patented technology

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.

The invention belongs to the field of concrete materials, and specifically relates to a functional aggregate and a preparation method thereof. The functional aggregate is characterized in that: the functional aggregate has a core-shell structure, and is composed of a porous core substrate and an alkaline surface active shell. Mullite is a main mineral phase of the porous core substrate, and a continuous phase is formed. Pores are distributed in the continuous phase. The pore sizes of the pores are distributed in a multilevel form. The pores are mainly micron-leveled pores. The mineral phase of the alkaline surface active shell is mainly composed of dicalcium silicate, tricalcium silicate, tricalcium aluminate, and tetracalcium iron aluminate. The functional aggregate provided by the invention has light weight and high strength. The functional aggregate can be internally cured, and has a surface active layer. When the functional aggregate is used in concrete, an interfacial transition zone (ITZ) can be completely enhanced and improved, cement stone structure formation can be regulated, and concrete overall performance can be improved. The preparation process is simple and controllable, and is easy to operate.

The invention discloses high-performance fiber concrete with a C110 strength grade and a preparation method thereof. The concrete is prepared from the following components in parts by mass: 425 to 450 parts of cement, 120 to 130 parts of water, 710 to 730 parts of river sand, 1000 to 1030 parts of crushed stones, 60 to 90 parts of fly ash, 40 to 60 parts of rich husk ash, 40 to 60 parts of silicon ash, 9 to 10 parts of a water reducing agent, 13 to 14 parts of an exciting agent, 1.1 to 1.8 parts of cellulose fibers, 20 to 23 parts of a hydroxyl-modified carbon nanotube dispersion solution and 2.2 to 2.4 parts of a de-foaming agent. The concrete prepared by the preparation method has relatively high toughness and excellent durability and has relatively high bonding strength with section steel. The high-performance fiber concrete is used in a section steel concrete composite structure and can effectively express cooperative work performance between the section steel and the concrete; the disadvantages that the bonding performance of the section steel and the concrete is poor and respective mechanical properties of the section steel and the concrete cannot be sufficiently expressed are overcome.

The invention discloses ultrahigh-strength and high-performance fiber concrete with a C180 strength grade and a preparation method thereof. The concrete is prepared from the following components in parts by mass: 505 parts of cement, 70 parts of water, 1000 parts of crushed stones, 770 parts of fine aggregate, 70 parts of fly ash, 78 parts of rich husk ash, 118 parts of silicon ash, 15 parts of a water reducing agent, 10 parts of an exciting agent, 1.7 parts of cellulose fibers, 43 parts of a hydroxyl-modified carbon nanotube dispersion solution, 45 parts of a graphene oxide dispersion solution and 2.7 parts of a de-foaming agent. The concrete prepared by the preparation method has relatively high toughness and excellent durability and has relatively high bonding strength with section steel; the compression strength reaches 188.63MPa, the flexural strength reaches 36.44MPa, the splitting tensile strength reaches 15.38MPa, the bonding strength with the section steel reaches 7.68MPa and a chloride ion anti-leakage grade reaches a grade VI. The ultrahigh-strength and high-performance fiber concrete is used in a section steel concrete composite structure and can effectively express cooperative work performance between the section steel and the concrete; the disadvantages that the bonding performance of the section steel and the concrete is poor and respective mechanical properties of the section steel and the concrete cannot be sufficiently expressed are overcome.

The invention discloses ultrahigh-strength and high-performance fiber concrete with a C170 strength grade and a preparation method thereof. The concrete is prepared from the following components in parts by mass: 497 parts of cement, 74 parts of water, 1000 parts of crushed stones, 760 parts of fine aggregate, 80 parts of fly ash, 75 parts of rich husk ash, 111 parts of silicon ash, 14.4 parts of a water reducing agent, 10 parts of an exciting agent, 1.6 parts of cellulose fibers, 41 parts of a hydroxyl-modified carbon nanotube dispersion solution, 42 parts of a graphene oxide dispersion solution and 2.6 parts of a de-foaming agent. The concrete prepared by the preparation method has relatively high toughness and excellent durability and has relatively high bonding strength with section steel; the compression strength reaches 175.91MPa, the flexural strength reaches 35.76MPa, the splitting tensile strength reaches 15.26MPa, the bonding strength with the section steel reaches 7.49MPa and a chloride ion anti-leakage grade reaches a grade VI. The ultrahigh-strength and high-performance fiber concrete is used in a section steel concrete composite structure and can effectively express cooperative work performance between the section steel and the concrete; the disadvantages that the bonding performance of the section steel and the concrete is poor and respective mechanical properties of the section steel and the concrete cannot be sufficiently expressed are overcome.

The invention discloses high-performance fiber concrete at a C60 strength grade and a preparation method thereof. The concrete comprises the following components in parts by mass: 360-380 parts of cement, 145-160 parts of water, 700-720 parts of river sand, 1020-1040 parts of gravel, 80-125 parts of fly ash, 40-60 parts of rice hull ash, 6-7.5 parts of a water reducing agent, 9-10 parts of a shrinkage reducing agent, 12.5-14 parts of an excitant, 1.1-1.8 parts of cellulosic fibers, 16-20 parts of a carboxyl butadiene styrene polymer an 1.7-1.8 parts of an antifoaming agent. The prepared concrete has high toughness and excellent durability, has high bonding strength with section steel, can effectively achieve the cooperative working performance between the section steel and the concrete when applied to a section steel and concrete combined structure, and overcomes the defects that the adhesive property between the section steel and the concrete is poor and respective mechanical properties of the two cannot be fully achieved.

The invention discloses high-performance fiber concrete with a C50 strength grade and a preparation method of the high-performance fiber concrete. The concrete comprises the following components in parts by mass: 330-350 parts of cement, 160-175 parts of water, 710-730 parts of river sand, 1010-1030 parts of gravels, 90-130 parts of coal ash, 20-50 parts of rice hull ash, 5-7 parts of water reducing agent, 8-9 parts of shrinkage reducing agent, 12-14 parts of exciting agent, 1.1-1.7 parts of cellulose fiber, 12-15 parts of carboxyl styrene butadiene polymers and 1.7-1.8 parts of defoaming agent. The prepared concrete has relatively high toughness and excellent durability and has relatively high bonding strength with profile steel; and when the high-performance fiber concrete is used in a profile steel and concrete combined structure, the coordinated working performance between the profile steel and the concrete can be effectively exerted, and the defects that the bonding performance of the profile steel and the concrete is poor and the mechanical properties of the profile steel and the concrete cannot be sufficiently exerted are made up.

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.

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.

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.

The invention discloses a formula and preparation method for renewable concrete. The formula comprises the following raw materials in parts by weight: 100-150 parts of Portland cement, 15-35 parts offly ash, 100-200 parts of river sand, 4-8 parts of a water reducing agent, 5-15 parts of a shrinkage reducing agent, 200-400 parts of coarse aggregate, 100-200 parts of fine aggregate, 5-10 parts of polyester fibers, 5-15 parts of steel fibers, 5-15 parts of straw ash and 50-80 parts of water, wherein the coarse aggregate and the fine aggregate are both prepared by crushing and grinding waste concrete, the particle size of the coarse aggregate is 18-22 mm, and the particle size of the fine aggregate is 5-10 mm. According to the invention, the formula and the preparation process of the renewable concrete are adjusted, so the strength of the prepared concrete can reach C60 or above, the problem of cracking is avoided, and problems in recycling of waste concrete are well solved.

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.

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.

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.

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.

The invention discloses high-toughness and high-cohesiveness C240 ultrahigh-strength hybrid fiber concrete and a preparation method thereof. The 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 (545-550): (750-760): (850-860): (68-73): (100-105): (120-130): (5.2-5.4): (72-76): (19-20): (16-17): (2.8-3.2): (14-15): (7.2-7.5): (13-13.3): (20-21): (21.5-23): (40-44). 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 concrete and profile steel are obviously improved.

The invention discloses fiber-reinforced recycled aggregate pervious concrete, which is prepared by adopting the following formula: 270-350 kg/m < 3 > of cement, 355-450 kg/m < 3 > of water, 1360-1950 kg/m < 3 > of coarse aggregate, 35-100% of recycled aggregate, 0-30 kg/m < 3 > of polymer emulsion, 0-9.6 kg/m < 3 > of water reducing agent, 0-5 kg/m < 3 > of high-performance admixture, a water-binder ratio of 0.24-0.42, a slurry-bone ratio of 1: 3.8-1: 4.7, the maximum nominal particle size of the coarse aggregate is 5-20 mm, the maximum nominal particle size of the recycled aggregate is 5-20 mm, and the maximum nominal particle size of the recycled aggregate is 5-20 mm. The pervious concrete is prepared from the recycled aggregate, carbon emission in the whole life cycle of ground and pavement paving materials is further reduced, meanwhile, construction waste and solid waste are effectively utilized, the breaking strength and toughness of a pervious paving layer are greatly improved through the fiber reinforcement technology, a premixing mode is adopted for production in a breakthrough mode, the production efficiency is greatly improved, and the production cost is reduced. And the quality stability of a pervious concrete product is ensured to a greater extent.