CN117383867A - Overhead bridge pier reinforced protection layer concrete structure - Google Patents
Overhead bridge pier reinforced protection layer concrete structure Download PDFInfo
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- CN117383867A CN117383867A CN202311136340.2A CN202311136340A CN117383867A CN 117383867 A CN117383867 A CN 117383867A CN 202311136340 A CN202311136340 A CN 202311136340A CN 117383867 A CN117383867 A CN 117383867A
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- 239000004567 concrete Substances 0.000 title claims abstract description 98
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 54
- 239000000835 fiber Substances 0.000 claims abstract description 54
- 239000010959 steel Substances 0.000 claims abstract description 54
- 239000004568 cement Substances 0.000 claims abstract description 48
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 45
- 230000002787 reinforcement Effects 0.000 claims abstract description 44
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 41
- 229920005989 resin Polymers 0.000 claims abstract description 31
- 239000011347 resin Substances 0.000 claims abstract description 31
- 238000007789 sealing Methods 0.000 claims abstract description 29
- 239000002245 particle Substances 0.000 claims abstract description 22
- 238000003763 carbonization Methods 0.000 claims abstract description 8
- 239000004890 Hydrophobing Agent Substances 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 48
- 238000003756 stirring Methods 0.000 claims description 35
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 29
- 238000002360 preparation method Methods 0.000 claims description 22
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 20
- 239000012159 carrier gas Substances 0.000 claims description 15
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 15
- 239000000725 suspension Substances 0.000 claims description 15
- 239000011241 protective layer Substances 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 7
- 230000002378 acidificating effect Effects 0.000 claims description 7
- 239000004925 Acrylic resin Substances 0.000 claims description 5
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 5
- 229920001661 Chitosan Polymers 0.000 claims description 5
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 5
- 229920000877 Melamine resin Polymers 0.000 claims description 5
- 239000004640 Melamine resin Substances 0.000 claims description 5
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 5
- 125000001931 aliphatic group Chemical group 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 5
- 239000004327 boric acid Substances 0.000 claims description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 5
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 5
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 5
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- 238000001704 evaporation Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000002209 hydrophobic effect Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 239000003094 microcapsule Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 claims description 5
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 claims description 5
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 5
- 229920005646 polycarboxylate Polymers 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 238000004537 pulping Methods 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 239000011975 tartaric acid Substances 0.000 claims description 5
- 235000002906 tartaric acid Nutrition 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims 1
- 229910007857 Li-Al Inorganic materials 0.000 claims 1
- 229910008447 Li—Al Inorganic materials 0.000 claims 1
- 230000035699 permeability Effects 0.000 abstract description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 3
- 230000003628 erosive effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000013078 crystal Substances 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 10
- 238000006116 polymerization reaction Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 210000003205 muscle Anatomy 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 239000003673 groundwater Substances 0.000 description 4
- 230000036571 hydration Effects 0.000 description 4
- 238000006703 hydration reaction Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- MHWRYTCHHJGQFQ-UHFFFAOYSA-N prop-2-enoic acid hydrate Chemical compound O.OC(=O)C=C MHWRYTCHHJGQFQ-UHFFFAOYSA-N 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000002940 repellent Effects 0.000 description 3
- 239000005871 repellent Substances 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000005543 nano-size silicon particle Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 150000005837 radical ions Chemical class 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/22—Carbonation resistance
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the field of manufacturing of viaduct piers, in particular to a reinforced protection layer concrete structure of an viaduct pier, which comprises a reinforcement cage, wherein a concrete layer is poured on the outer side of the reinforcement cage; the concrete layer comprises 100-160 parts of modified cement, 200-300 parts of coarse aggregate, 100-200 parts of steel fiber, 20-60 parts of reinforced resin, 10-30 parts of hydrophobing agent, 20-60 parts of water reducer, 10-20 parts of hole sealing agent and 10-20 parts of antifreezing agent. According to the invention, the coarse aggregate with more uniform particle size is adopted as the aggregate, and any fine aggregate is not doped, so that the water permeability and air permeability of the concrete are better, the coarse aggregate, the modified cement, the steel fiber and the reinforced resin are mixed with each other, the overall strength of the concrete is improved, the carbonization resistance and chloride ion erosion resistance of the concrete layer of the overhead pier are improved, and the service life of the overhead pier is prolonged.
Description
Technical Field
The invention relates to the technical field of manufacturing of viaduct piers, in particular to a reinforced protection layer concrete structure of an viaduct pier.
Background
Overpasses, i.e. overpasses, bridges with high-supporting towers or struts, bridges that bridge valleys, rivers, roads or other low-lying obstacles. After the city is developed, the traffic is crowded, the buildings are dense, the streets are difficult to widen, and the traffic density can be evacuated by adopting the bridge, so that the transportation efficiency is improved. In addition, the highway or railway between cities can also be used without embankment in order to avoid crossing other line planes, save land and reduce roadbed subsidence.
The bridge pier is mainly used for supporting bridge span structures, the bridge pier is often formed by wrapping steel bars by adopting a mould and pouring concrete for hardening, and the concrete is one of main materials of the overhead bridge pier and has the characteristics of rich raw materials, low price and simple production process, so that the consumption of the bridge pier is increased. Meanwhile, the concrete has the characteristics of high compressive strength, good durability, wide strength grade range and the like.
In recent years, along with the development of economy, the weight born by the viaduct is increased, the strength of the traditional concrete is difficult to reach the standard of viaduct pier construction, and the novel high-strength concrete needs to be continuously developed to meet the requirements of the viaduct pier on the strength and the tear resistance of the concrete.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects in the prior art, and thereby provide the reinforced protection layer concrete structure of the overhead pier.
In order to solve the technical problems, the invention provides an overhead pier reinforced protection layer concrete structure, which comprises a reinforcement cage, wherein a concrete layer is poured on the outer side of the reinforcement cage;
the concrete layer comprises 100-160 parts of modified cement, 200-300 parts of coarse aggregate, 100-200 parts of steel fiber, 20-60 parts of reinforced resin, 10-30 parts of hydrophobing agent, 20-60 parts of water reducer, 10-20 parts of hole sealing agent and 10-20 parts of antifreezing agent.
Preferably, the preparation method of the concrete layer comprises the following steps:
step one: weighing the components according to the proportion, firstly adding the modified cement, the coarse aggregate and the modified steel fiber during feeding, adding water accounting for 30-50% of the total water quantity, and stirring for 2-4 minutes at 1000-3000 rpm;
step two: adding a hydrophobic agent, stirring for 2-4 minutes at 1000-3000 rpm, adding a hole sealing agent, and stirring for 2-4 minutes at 1000-3000 rpm;
step three: then adding the water reducer and the antifreezing agent, stirring for 20-30 minutes at 1000-3000 rpm, and discharging.
Preferably, the preparation method of the modified cement comprises the following steps:
s1, dispersing L i-A l layered double hydroxide powder and an acidic retarder in ethanol liquid to form a mixed suspension for later use;
s2, carrying out opposite impact collision on the atomized mixed suspension and cement particles carried by the hot carrier gas, spraying the mixed suspension on the surfaces of the cement particles, and evaporating ethanol on the surfaces of the cement particles under the action of the hot carrier gas to obtain the modified cement.
Preferably, the temperature of the hot carrier gas is 120-200 ℃, and the acid retarder is one or a combination of more of boric acid, citric acid and tartaric acid.
Preferably, the preparation method of the coarse aggregate comprises the following steps:
s1, soaking coarse aggregate in water, and adding nano silicon dioxide powder, wherein the weight ratio of the coarse aggregate to the nano silicon dioxide powder is (5-7): 1, stirring to fully mix the coarse aggregate and the nano silicon dioxide powder to obtain mixed coarse aggregate;
s2, placing the mixed coarse aggregate in a carbonization furnace at 300-500 ℃ and heating for 2-3 hours to obtain carbonized mixed coarse aggregate;
and S3, taking out the coarse aggregate and crushing.
Preferably, the reinforced resin is one or a combination of sodium polyacrylate resin, melamine resin and carboxymethyl cellulose grafted acrylic acid water absorption resin, and the reinforced resin is subjected to polymerization treatment before being added into the concrete, so that the water retention capacity and the water absorption capacity of the reinforced resin can be improved by carrying out polymerization treatment on the reinforced resin, and the concrete layer can keep stable performance for a long time.
Preferably, the water reducing agent is one or a combination of more of a polycarboxylate water reducing agent, a naphthalene water reducing agent, an aliphatic water reducing agent and an sulfamic acid water reducing agent, and the water reducing rate of the water reducing agent is not less than 30 percent.
Preferably, the steel fiber is one or more of common steel fiber, stainless steel fiber and aluminum fiber, and after the steel fiber is added, the steel fiber is bonded with the interface of the concrete matrix, so that the strength and the crack resistance of the concrete layer are improved, the steel fiber is required to be subjected to annealing treatment, and after the steel fiber is subjected to annealing treatment, internal crystal grains are refined, crystal boundaries are increased, a fine crystal strengthening effect is generated, and the tensile strength of the steel fiber is improved.
Preferably, the preparation method of the hole sealing agent comprises the following steps: pulping 20-30 parts of silica micropowder, starting a stirrer, adding 2-5 parts of long-chain carbonic acid, stirring for 5-8 minutes at 3000-6000 rpm, adding 6-8 parts of microcapsule hole sealing agent and 9-12 parts of chitosan, and stirring for 20-40 minutes at 1000-2000 rpm to obtain the hole sealing agent.
Preferably, the steel reinforcement cage includes many vertical main muscle, many vertical main muscle distributes according to the shape of overpass mound outline, the surface equidistance of many vertical main muscle is tied up there is the stirrup, the fixed cover in surface of stirrup is equipped with the protective layer cushion, the fixed cover in top of vertical main muscle is equipped with EPE protective sleeve.
By means of the technical scheme, the invention provides the concrete structure of the reinforced protection layer of the overhead pier, which has the following beneficial effects:
1. according to the reinforced protection layer concrete structure of the overhead bridge pier, coarse aggregate with more uniform particle size is adopted as aggregate, any fine aggregate is not doped, so that the water permeability and air permeability of the concrete are better, the coarse aggregate, the modified cement, the steel fiber and the reinforced resin are mixed with each other, the overall strength of the concrete is improved, the carbonization resistance and the chloride ion erosion resistance of the concrete layer of the overhead bridge pier are improved, and the service life of the overhead bridge pier is prolonged.
2. According to the concrete structure of the reinforced protection layer of the viaduct pier, the acid retarder on the surface of the modified cement is hydrolyzed to release H+ and acid radical ions after meeting water, the H+ is utilized to destroy the interlayer structure of L i-Al LDHs, so that the interlayer structure is disintegrated to release Li+ and Al+, the two ions can penetrate and destroy the hydration film on the surface of cement particles, water is enabled to continuously contact with the cement particles, cement hydration is further promoted, and early strength of the viaduct pier in preparation can be effectively improved.
3. According to the concrete structure of the reinforced protection layer of the overhead bridge pier, aggregate is carbonized, nano silicon dioxide is mixed with coarse aggregate, so that the concrete layer of the overhead bridge pier can bear larger pressure, the integral strength of the overhead bridge is improved, and the concrete layer is kept stable for a long time.
4. According to the reinforced protection layer concrete structure of the overhead bridge pier, the hole sealing agent can be mixed when concrete is stirred, all raw materials act cooperatively, the hole sealing agent continuously acts gradually in the hardening process of the concrete, the air holes on the surface of the concrete are sealed, the defect of the interface between the concrete and a template can be effectively reduced, the aesthetic degree of a hardened concrete engineering can be improved, and the rebound strength of the concrete is improved.
5. This overhead pier protective layer concrete structure mixes the hydrophobe in the concrete for the inside pore of concrete layer of overhead pier is more smooth and easy, has stronger water permeability, makes the rainwater permeate underground rapidly, supplements groundwater, keeps soil humidity, maintains the ecological balance of groundwater and soil, and still has the sound absorption effect, reducible environmental noise, and the space can adsorb urban pollutant, reduces the dust pollution.
6. This overhead bridge pier protective layer concrete structure, EPE protective sleeve can effectively avoid the top of vertical main muscle to the damage of reinforcing bar in handling, ensures that the top of vertical main muscle is parallel not buckled, and the protective layer cushion is vertical to arrange once every meter, and eight along circumference symmetry arranges, bears external force effect protective layer cushion to have an anchor to the steel reinforcement cage, utilizes the anchor between concrete layer and the steel reinforcement cage, makes both combine closely.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the internal structure of the present invention;
fig. 3 is an enlarged view of a portion of fig. 2 a in accordance with the present invention.
In the figure: 1. a reinforcement cage; 101. a vertical main rib; 102. stirrups; 103. a protective layer cushion block; 104. an EPE protective sleeve; 2. and (3) a concrete layer.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
the concrete structure of the reinforcement protection layer of the overhead bridge pier comprises a reinforcement cage 1, wherein a concrete layer 2 is poured on the outer side of the reinforcement cage 1;
the concrete layer 2 comprises 100 parts of modified cement, 200 parts of coarse aggregate, 100 parts of steel fiber, 20 parts of reinforced resin, 10 parts of hydrophobing agent, 20 parts of water reducer, 10 parts of hole sealing agent and 10 parts of antifreezing agent.
The preparation method of the concrete layer 2 comprises the following steps:
step one: weighing the components according to the proportion, firstly adding the modified cement, the coarse aggregate and the modified steel fiber during feeding, adding water accounting for 30% of the total water quantity, and stirring for 2 minutes at 1000 rpm;
step two: adding a hydrophobic agent, stirring at 1000 rpm for 2 minutes, adding a hole sealing agent, and stirring at 1000 rpm for 2 minutes;
step three: then adding the water reducing agent and the antifreezing agent, stirring for 20 minutes at 1000 revolutions per minute, and discharging.
The preparation method of the modified cement comprises the following steps:
s1, dispersing L i-A l layered double hydroxide powder and an acidic retarder in ethanol liquid to form a mixed suspension for later use;
s2, carrying out opposite impact collision on the atomized mixed suspension and cement particles carried by the hot carrier gas, spraying the mixed suspension on the surfaces of the cement particles, and evaporating ethanol on the surfaces of the cement particles under the action of the hot carrier gas to obtain the modified cement, wherein the temperature of the hot carrier gas is 120 ℃, and the acidic retarder is one or a combination of more of boric acid, citric acid and tartaric acid.
The preparation method of the coarse aggregate comprises the following steps:
s1, placing coarse aggregate into water for soaking, and adding nano silicon dioxide powder, wherein the weight ratio of the coarse aggregate to the nano silicon dioxide powder is 5:1, stirring to fully mix the coarse aggregate and the nano silicon dioxide powder to obtain mixed coarse aggregate;
s2, placing the mixed coarse aggregate in a carbonization furnace at 300 ℃ and heating for 2 hours to obtain carbonized mixed coarse aggregate;
and S3, taking out the coarse aggregate and crushing.
The reinforced resin is one or a combination of sodium polyacrylate resin, melamine resin and carboxymethyl cellulose grafted acrylic acid water absorption resin, and the reinforced resin needs to be subjected to polymerization treatment before being added into the concrete, so that the water retention capacity and the water absorption capacity of the reinforced resin can be improved by carrying out polymerization treatment on the reinforced resin, and the long-term stable performance of the concrete layer can be kept.
The water reducing agent is one or a combination of more of a polycarboxylate water reducing agent, a naphthalene water reducing agent, an aliphatic water reducing agent and an sulfamic acid water reducing agent, and the water reducing rate of the water reducing agent is not less than 30 percent.
The steel fiber is selected from one or more of common steel fiber, stainless steel fiber and aluminum fiber, and after the steel fiber is added, the steel fiber is bonded with the interface of the concrete matrix, so that the strength and the crack resistance of the concrete layer are improved, the steel fiber is required to be annealed, and after the steel fiber is annealed, the internal crystal grains are thinned, the crystal boundary is increased, the fine crystal strengthening effect is generated, and the tensile strength of the steel fiber is improved.
The preparation method of the hole sealing agent comprises the following steps: and (3) pulping 20 parts of silica micropowder, starting a stirrer, adding 2 parts of long-chain carbonic acid, stirring for 5 minutes at 3000 rpm, adding 6 parts of microcapsule hole sealing agent and 9 parts of chitosan, and stirring for 20 minutes at 1000 rpm to obtain the hole sealing agent.
The reinforcement cage 1 comprises a plurality of vertical main reinforcements 101, the plurality of vertical main reinforcements 101 are distributed according to the shape of the outline of the viaduct pier, stirrups 102 are bundled on the outer surfaces of the plurality of vertical main reinforcements 101 at equal intervals, protective layer cushion blocks 103 are sleeved on the outer surface fixing of the stirrups 102, and EPE protective sleeves 104 are fixedly sleeved on the top ends of the vertical main reinforcements 101.
Embodiment two:
the concrete structure of the reinforcement protection layer of the overhead bridge pier comprises a reinforcement cage 1, wherein a concrete layer 2 is poured on the outer side of the reinforcement cage 1;
the concrete layer 2 comprises 140 parts of modified cement, 250 parts of coarse aggregate, 150 parts of steel fiber, 40 parts of reinforced resin, 20 parts of water repellent, 40 parts of water reducer, 15 parts of hole sealing agent and 15 parts of antifreezing agent.
The preparation method of the concrete layer 2 comprises the following steps:
step one: weighing the components according to the proportion, firstly adding the modified cement, the coarse aggregate and the modified steel fiber during feeding, adding water with the total water content of 40%, and stirring for 3 minutes at 2000 rpm;
step two: adding a hydrophobic agent, stirring for 3 minutes at 2000 rpm, adding a hole sealing agent, and stirring for 3 minutes at 2000 rpm;
step three: then adding the water reducing agent and the antifreezing agent, stirring for 25 minutes at 2000 rpm, and discharging.
The preparation method of the modified cement comprises the following steps:
s1, dispersing L i-A l layered double hydroxide powder and an acidic retarder in ethanol liquid to form a mixed suspension for later use;
s2, carrying out opposite impact collision on the atomized mixed suspension and cement particles carried by the hot carrier gas, spraying the mixed suspension on the surfaces of the cement particles, and evaporating ethanol on the surfaces of the cement particles under the action of the hot carrier gas to obtain the modified cement, wherein the temperature of the hot carrier gas is 160 ℃, and the acid retarder is one or a combination of more of boric acid, citric acid and tartaric acid.
The preparation method of the coarse aggregate comprises the following steps:
s1, placing coarse aggregate into water for soaking, and adding nano silicon dioxide powder, wherein the weight ratio of the coarse aggregate to the nano silicon dioxide powder is 6:1, stirring to fully mix the coarse aggregate and the nano silicon dioxide powder to obtain mixed coarse aggregate;
s2, placing the mixed coarse aggregate in a carbonization furnace at 400 ℃ and heating for 2.5 hours to obtain carbonized mixed coarse aggregate;
and S3, taking out the coarse aggregate and crushing.
The reinforced resin is one or a combination of sodium polyacrylate resin, melamine resin and carboxymethyl cellulose grafted acrylic acid water absorption resin, and the reinforced resin needs to be subjected to polymerization treatment before being added into the concrete, so that the water retention capacity and the water absorption capacity of the reinforced resin can be improved by carrying out polymerization treatment on the reinforced resin, and the long-term stable performance of the concrete layer can be kept.
The water reducing agent is one or a combination of more of a polycarboxylate water reducing agent, a naphthalene water reducing agent, an aliphatic water reducing agent and an sulfamic acid water reducing agent, and the water reducing rate of the water reducing agent is not less than 30 percent.
The steel fiber is selected from one or more of common steel fiber, stainless steel fiber and aluminum fiber, and after the steel fiber is added, the steel fiber is bonded with the interface of the concrete matrix, so that the strength and the crack resistance of the concrete layer are improved, the steel fiber is required to be annealed, and after the steel fiber is annealed, the internal crystal grains are thinned, the crystal boundary is increased, the fine crystal strengthening effect is generated, and the tensile strength of the steel fiber is improved.
The preparation method of the hole sealing agent comprises the following steps: and (3) pulping 25 parts of silica micropowder, starting a stirrer, adding 4 parts of long-chain carbonic acid, stirring for 6 minutes at 4000 rpm, adding 7 parts of microcapsule hole sealing agent and 10 parts of chitosan, and stirring for 30 minutes at 1500 rpm to obtain the hole sealing agent.
The reinforcement cage 1 comprises a plurality of vertical main reinforcements 101, the plurality of vertical main reinforcements 101 are distributed according to the shape of the outline of the viaduct pier, stirrups 102 are bundled on the outer surfaces of the plurality of vertical main reinforcements 101 at equal intervals, protective layer cushion blocks 103 are sleeved on the outer surface fixing of the stirrups 102, and EPE protective sleeves 104 are fixedly sleeved on the top ends of the vertical main reinforcements 101.
Embodiment III:
the concrete structure of the reinforcement protection layer of the overhead bridge pier comprises a reinforcement cage 1, wherein a concrete layer 2 is poured on the outer side of the reinforcement cage 1;
the concrete layer 2 comprises 160 parts of modified cement, 300 parts of coarse aggregate, 200 parts of steel fiber, 60 parts of reinforced resin, 30 parts of water repellent, 60 parts of water reducer, 20 parts of hole sealing agent and 20 parts of antifreezing agent.
The preparation method of the concrete layer 2 comprises the following steps:
step one: weighing the components according to the proportion, firstly adding the modified cement, the coarse aggregate and the modified steel fiber during feeding, adding water with the total water content of 50%, and stirring for 4 minutes at 3000 rpm;
step two: adding a hydrophobic agent, stirring for 4 minutes at 3000 rpm, adding a hole sealing agent, and stirring for 4 minutes at 3000 rpm;
step three: then adding the water reducing agent and the antifreezing agent, stirring for 30 minutes at 3000 rpm, and discharging.
The preparation method of the modified cement comprises the following steps:
s1, dispersing L i-A l layered double hydroxide powder and an acidic retarder in ethanol liquid to form a mixed suspension for later use;
s2, carrying out opposite impact collision on the atomized mixed suspension and cement particles carried by the hot carrier gas, spraying the mixed suspension on the surfaces of the cement particles, and evaporating ethanol on the surfaces of the cement particles under the action of the hot carrier gas to obtain the modified cement, wherein the temperature of the hot carrier gas is 200 ℃, and the acidic retarder is one or a combination of more of boric acid, citric acid and tartaric acid.
The preparation method of the coarse aggregate comprises the following steps:
s1, placing coarse aggregate into water for soaking, and adding nano silicon dioxide powder, wherein the weight ratio of the coarse aggregate to the nano silicon dioxide powder is 7:1, stirring to fully mix the coarse aggregate and the nano silicon dioxide powder to obtain mixed coarse aggregate;
s2, placing the mixed coarse aggregate in a carbonization furnace at 500 ℃ and heating for 3 hours to obtain carbonized mixed coarse aggregate;
and S3, taking out the coarse aggregate and crushing.
The reinforced resin is one or a combination of sodium polyacrylate resin, melamine resin and carboxymethyl cellulose grafted acrylic acid water absorption resin, and the reinforced resin needs to be subjected to polymerization treatment before being added into the concrete, so that the water retention capacity and the water absorption capacity of the reinforced resin can be improved by carrying out polymerization treatment on the reinforced resin, and the long-term stable performance of the concrete layer can be kept.
The water reducing agent is one or a combination of more of a polycarboxylate water reducing agent, a naphthalene water reducing agent, an aliphatic water reducing agent and an sulfamic acid water reducing agent, and the water reducing rate of the water reducing agent is not less than 30 percent.
The steel fiber is selected from one or more of common steel fiber, stainless steel fiber and aluminum fiber, and after the steel fiber is added, the steel fiber is bonded with the interface of the concrete matrix, so that the strength and the crack resistance of the concrete layer are improved, the steel fiber is required to be annealed, and after the steel fiber is annealed, the internal crystal grains are thinned, the crystal boundary is increased, the fine crystal strengthening effect is generated, and the tensile strength of the steel fiber is improved.
The preparation method of the hole sealing agent comprises the following steps: pulping 30 parts of silica micropowder, starting a stirrer, adding 5 parts of long-chain carbonic acid, stirring for 8 minutes at 6000 rpm, adding 8 parts of microcapsule hole sealing agent and 12 parts of chitosan, and stirring for 40 minutes at 2000 rpm to obtain the hole sealing agent.
The reinforcement cage 1 comprises a plurality of vertical main reinforcements 101, the plurality of vertical main reinforcements 101 are distributed according to the shape of the outline of the viaduct pier, stirrups 102 are bundled on the outer surfaces of the plurality of vertical main reinforcements 101 at equal intervals, protective layer cushion blocks 103 are sleeved on the outer surface fixing of the stirrups 102, and EPE protective sleeves 104 are fixedly sleeved on the top ends of the vertical main reinforcements 101.
In summary, the concrete structure of the reinforced protection layer of the overhead pier adopts coarse aggregate with more uniform particle size, does not dope any fine aggregate, ensures that the water permeability and air permeability of the concrete are better, mixes the coarse aggregate, the modified cement, the steel fiber and the reinforced resin with each other, improves the overall strength of the concrete, improves the carbonization resistance and the chloride ion erosion resistance of the concrete layer of the overhead pier, and prolongs the service life of the overhead pier.
The acid retarder on the surface of the modified cement is hydrolyzed to release H+ and acid radical ions after meeting water, and the H+ is utilized to destroy the interlayer structure of L i-Al LDHs, so that the modified cement is disintegrated to release Li+ and Al3+, and the two ions can penetrate and destroy the hydration film on the surface of cement particles, so that the water is continuously contacted with the cement particles to promote the hydration of the cement, and the early strength of the viaduct pier in preparation can be effectively improved.
The aggregate is carbonized, and nano silicon dioxide is mixed with coarse aggregate, so that the concrete layer 2 of the overpass pier can bear larger pressure, the integral strength of the overpass is improved, and the concrete layer 2 is kept stable for a long time.
The hole sealing agent can be mixed when the concrete is stirred, all raw materials act cooperatively, the raw materials continuously and gradually act in the hardening process of the concrete, the air holes on the surface of the concrete are sealed, the defects of the interface between the concrete and the template can be effectively reduced, the attractiveness of the hardened concrete engineering can be improved, and the rebound strength of the concrete is improved.
The water repellent is doped into the concrete, so that the inner pore canal of the concrete layer 2 of the viaduct pier is smoother, the viaduct pier has stronger water permeability, rainwater can quickly infiltrate into the ground, groundwater is supplemented, soil humidity is kept, ecological balance of the groundwater and the soil is maintained, the viaduct pier also has a sound absorption effect, environmental noise can be reduced, gaps can absorb urban pollutants, and dust pollution is reduced.
The EPE protective sleeve 104 can effectively avoid the damage to the steel bars in the treatment process of the top ends of the vertical main ribs 101, ensures that the top ends of the vertical main ribs 101 are parallel and not bent, the protective layer cushion blocks 103 are vertically arranged every 2 meters, eight protective layer cushion blocks 103 are symmetrically arranged along the circumference, bear the external force and have anchoring force on the steel bar cage 1, and the concrete layer 2 and the steel bar cage 1 are tightly combined by using the anchoring force between the concrete layer 2 and the steel bar cage 1.
It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an overhead bridge pier protective reinforcement concrete structure, includes steel reinforcement cage (1), its characterized in that: a concrete layer (2) is poured on the outer side of the reinforcement cage (1);
the concrete layer (2) comprises 100-160 parts of modified cement, 200-300 parts of coarse aggregate, 100-200 parts of steel fiber, 20-60 parts of reinforced resin, 10-30 parts of hydrophobing agent, 20-60 parts of water reducer, 10-20 parts of hole sealing agent and 10-20 parts of antifreezing agent.
2. The elevated pier reinforcement concrete structure of claim 1, wherein: the preparation method of the concrete layer (2) comprises the following steps:
step one: weighing the components according to the proportion, firstly adding the modified cement, the coarse aggregate and the modified steel fiber during feeding, adding water accounting for 30-50% of the total water quantity, and stirring for 2-4 minutes at 1000-3000 rpm;
step two: adding a hydrophobic agent, stirring for 2-4 minutes at 1000-3000 rpm, adding a hole sealing agent, and stirring for 2-4 minutes at 1000-3000 rpm;
step three: then adding the water reducer and the antifreezing agent, stirring for 20-30 minutes at 1000-3000 rpm, and discharging.
3. The elevated pier reinforcement concrete structure of claim 1, wherein: the preparation method of the modified cement comprises the following steps:
s1, dispersing Li-Al layered double hydroxide powder and an acidic retarder in ethanol liquid to form a mixed suspension for later use;
s2, carrying out opposite impact collision on the atomized mixed suspension and cement particles carried by the hot carrier gas, spraying the mixed suspension on the surfaces of the cement particles, and evaporating ethanol on the surfaces of the cement particles under the action of the hot carrier gas to obtain the modified cement.
4. An elevated pier reinforced protective layer concrete structure according to claim 3, wherein: the temperature of the hot carrier gas is 120-200 ℃, and the acid retarder is one or a combination of more of boric acid, citric acid and tartaric acid.
5. The elevated pier reinforcement concrete structure of claim 1, wherein: the preparation method of the coarse aggregate comprises the following steps:
s1, soaking coarse aggregate in water, and adding nano silicon dioxide powder, wherein the weight ratio of the coarse aggregate to the nano silicon dioxide powder is (5-7): 1, stirring to fully mix the coarse aggregate and the nano silicon dioxide powder to obtain mixed coarse aggregate;
s2, placing the mixed coarse aggregate in a carbonization furnace at 300-500 ℃ and heating for 2-3 hours to obtain carbonized mixed coarse aggregate;
and S3, taking out the coarse aggregate and crushing.
6. The elevated pier reinforcement concrete structure of claim 1, wherein: the reinforced resin is one or a combination of more of sodium polyacrylate resin, melamine resin and carboxymethyl cellulose grafted acrylic acid water-absorbing resin.
7. The elevated pier reinforcement concrete structure of claim 1, wherein: the water reducer is one or a combination of a plurality of polycarboxylate water reducer, naphthalene water reducer, aliphatic water reducer and sulfamic acid water reducer, and the water reducing rate of the water reducer is not less than 30%.
8. The elevated pier reinforcement concrete structure of claim 1, wherein: the steel fiber is one or more of common steel fiber, stainless steel fiber and aluminum fiber.
9. The elevated pier reinforcement concrete structure of claim 1, wherein: the preparation method of the hole sealing agent comprises the following steps: pulping 20-30 parts of silica micropowder, starting a stirrer, adding 2-5 parts of long-chain carbonic acid, stirring for 5-8 minutes at 3000-6000 rpm, adding 6-8 parts of microcapsule hole sealing agent and 9-12 parts of chitosan, and stirring for 20-40 minutes at 1000-2000 rpm to obtain the hole sealing agent.
10. The elevated pier reinforcement concrete structure of claim 1, wherein: the steel reinforcement cage (1) comprises a plurality of vertical main ribs (101), the plurality of vertical main ribs (101) are distributed according to the shape of the outline of the viaduct pier, stirrups (102) are bundled at equal intervals on the outer surfaces of the plurality of vertical main ribs (101), protective layer cushion blocks (103) are sleeved on the outer surface fixing sleeves of the stirrups (102), and EPE protective sleeves (104) are fixedly sleeved on the top ends of the vertical main ribs (101).
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