CN114890746A - Steel-STC light combined structure bridge deck pavement material, bridge deck and steam-curing-free construction process thereof - Google Patents
Steel-STC light combined structure bridge deck pavement material, bridge deck and steam-curing-free construction process thereof Download PDFInfo
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- CN114890746A CN114890746A CN202210533191.2A CN202210533191A CN114890746A CN 114890746 A CN114890746 A CN 114890746A CN 202210533191 A CN202210533191 A CN 202210533191A CN 114890746 A CN114890746 A CN 114890746A
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Classifications
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- 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
- C04B28/02—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 containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- 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
- C04B28/02—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 containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
- C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
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- 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
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- 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
- C04B2111/2038—Resistance against physical degradation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention provides a steel-STC light composite structure bridge deck pavement material, a bridge deck and a steam-curing-free construction process thereof. The paving material comprises the following components in parts by weight: p.o42.5 ordinary portland cement: 20-35 parts; fly ash: 10-25 parts; calcium carbonate whisker: 0.4-1 part; micro silicon powder: 5-10 parts; 100-200 mesh quartz powder: 10-20 parts; 40-100 mesh quartz sand: 10-20 parts; copper-plated steel fiber: 1-8 parts; polycarboxylic acid high-performance water reducing agent: 0.4-1 part; water: 7-15 parts. The paving material is prepared into premix and is uniformly paved on a steel bridge surface, a covering film is paved after the compaction and the leveling, the moisture maintenance is carried out, and the obtained local rigidity of the bridge surface is obviously improved. The load stress of each structural detail of the orthotropic steel bridge deck is greatly reduced, the risk of fatigue cracking is reduced, and compared with other types of pavement layers, the whole life cycle cost and carbon emission of the pavement layer have overwhelming advantages.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a steel-STC light composite structure bridge deck pavement material, a bridge deck and a steam-curing-free construction process thereof.
Background
The steel bridge has the characteristics of high strength, light dead weight, strong spanning capability and the like, and is widely applied to large-span bridges. The steel bridge deck pavement is a construction layer which is laid on a steel bridge deck slab, protects a steel plate and provides good driving performance, and the quality of the construction layer directly influences the safety, comfort, durability and the like of driving, and becomes an important index for evaluating the quality of bridge engineering.
After years of research and practice, the most commonly used steel bridge deck pavement materials at present mainly comprise the following components:
(1) poured asphalt concrete (GA), with the following disadvantages: the stability at high temperature is poor, and the diseases such as rutting and the like are easy to occur under the condition of heavy load in high-temperature weather;
(2) epoxy asphalt concrete (EA), drawback: the construction requirement is strict, the construction period is long, the damage maintenance is complex, and the influence on traffic is large;
(3) asphalt mastic macadam mixture (SMA) and dense-graded modified Asphalt Concrete (AC), and has the following defects: the stability and the durability are poor, the pavement is thick, the diseases in the application are more, and more maintenance is performed in the later period.
The traditional orthotropic steel bridge deck structure obtained based on the paving material has low local rigidity, and the load stress of each structural detail of the orthotropic steel bridge deck is large, so that the risk of fatigue cracking exists. The repair cost and the construction difficulty after cracking are very high. Therefore, there is a need to develop new bridge deck pavement materials and related construction processes.
Disclosure of Invention
Aiming at the problems and defects in the prior art, the invention provides a steel-STC light combined structure bridge deck pavement material, a bridge deck and a steam-curing-free construction process thereof. The technical scheme of the invention is as follows:
in a first aspect, the invention provides a steel-STC light composite structure bridge deck pavement material, which comprises the following components in parts by weight: p.o42.5 ordinary portland cement: 2035 portions of; fly ash: 10-25 parts; calcium carbonate whisker: 0.4-1 part; micro silicon powder: 5-10 parts; 100-200 mesh quartz powder: 10-20 parts; 40-100 mesh quartz sand: 10-20 parts; copper-plated steel fiber: 1-8 parts; polycarboxylic acid high-performance water reducing agent: 0.4-1 part; water: 7-15 parts.
Optionally, the steel-STC lightweight composite deck pavement further comprises: 5-20 parts of sulphoaluminate cement, 5-20 parts of ferro-aluminate cement, 30-35 parts of phosphoaluminate cement, 5-15 parts of ground slag, 0.01-0.1 part of nano silicon dioxide, 1-3 parts of PP fiber, 0.5-2 parts of PE fiber, 2-5 parts of POM fiber, 0.5-2 parts of PVA fiber and 1-2 parts of basalt fiber.
In a second aspect, the invention provides a steam-curing-free construction process of a steel-STC light combined structure bridge floor, which comprises the following steps:
step 1, preparing ingredients and preparing premix according to the weight parts of the paving material;
step 2, uniformly paving the prepared premix on a steel bridge deck;
step 3, performing jolt ramming and leveling operation, and controlling the paving thickness to be 45 +/-0.5 mm;
and 4, paving a covering film, and performing moisture preservation and maintenance.
Further, the process of preparing the premix in step 1 comprises:
(1) paving materials are prepared according to the mass ratio: dry mixing: water = (7-12): 1, mixing and stirring the components except the fiber in the dry mixture and water at the rotating speed of 20-30 r/min until the mixture is in a fluid state;
(2) then adding fiber, and continuing stirring for 1-2min to obtain the final product.
In a third aspect, the invention provides a steel-STC light combined structure bridge floor, which is obtained by adopting the steam-curing-free construction process.
The invention has the beneficial effects that:
1. compared with the traditional orthotropic steel bridge deck system, the local rigidity of the steel-STC light combined bridge deck structure is obviously improved. The load stress of each structural detail of the orthotropic steel bridge deck is greatly reduced, and the risk of fatigue cracking is reduced.
2. The STC layer is a permanent structure, does not need to be replaced within the service life of the whole steel-STC light combined bridge deck structure, and only needs to replace a common asphalt wearing layer with lower price.
3. Compared with other types of paving layers, the whole life cycle cost and carbon emission have overwhelming advantages. Taking the epoxy asphalt pavement commonly used at present as an example, the average price is about 1600 yuan per square meter, and the epoxy asphalt pavement is replaced once every 8 years. The STC layer is about 1800 yuan per square meter without replacement, and the wearing layer is about 80 yuan per square meter and is replaced once every 8 years. The economic advantage of steel-STC lightweight composite decks was highlighted since the 8 th year (first overhaul change). By the 50 th year (the minimum design service life of the STC layer), the total cost of the steel-STC light combined bridge deck pavement material is less than one fourth of the total cost of the steel-STC light combined bridge deck pavement material.
4. The steam-curing-free process can save steam-curing equipment, reduce construction difficulty, save a large amount of energy, reduce carbon emission and has more obvious economic advantages and environmental protection advantages.
Detailed Description
In the description of the present invention, it is to be noted that those whose specific conditions are not specified in the examples are carried out according to the conventional conditions or the conditions recommended by the manufacturers. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
Example 1
The embodiment provides a steel-STC light composite structure bridge deck pavement material, which comprises the following components in parts by weight: p.o42.5 ordinary portland cement: 30 parts of (1); fly ash: 15 parts of (1); calcium carbonate whisker: 0.6 part; micro silicon powder: 5 parts of a mixture; 100-200 mesh quartz powder: 15 parts of (1); 40-100 mesh quartz sand: 20 parts of (1); copper-plated steel fiber: 4 parts of a mixture; polycarboxylic acid high-performance water reducing agent: 0.4 part; water: 10 parts.
Example 2
The embodiment provides a steel-STC light composite structure bridge deck pavement material, which comprises the following components in parts by weight: p.o42.5 ordinary portland cement: 25 parts of (1); fly ash: 15 parts of (1); calcium carbonate whisker: 0.4 part; micro silicon powder: 8 parts of a mixture; 100-200 mesh quartz powder: 20 parts of (1); 40-100 mesh quartz sand: 15 parts of (1); copper-plated steel fiber: 3 parts, POM fiber: 3 parts of basalt fiber: 1.8 parts; polycarboxylic acid high-performance water reducing agent: 0.8 part; water: 8 parts.
Example 3
The embodiment provides a steel-STC light composite structure bridge deck pavement material, which comprises the following components in parts by weight: p.o42.5 ordinary portland cement: 20 parts of (1); 5 parts of sulphoaluminate cement; 5 parts of ferro-aluminate cement; grinding slag: 9 parts of (1); nano silicon dioxide: 0.1 part; fly ash: 20 parts of (1); calcium carbonate whisker: 1 part; micro silicon powder: 10 parts of (A); 100-200 mesh quartz powder: 17 parts of (1); 40-100 mesh quartz sand: 18 parts of a mixture; copper-plated steel fiber: 2 parts of (1); polycarboxylic acid high-performance water reducing agent: 0.6 part; water: 10 parts of (A); PP fiber: 1.3 parts; PE fiber: 1 part; PVA fiber: 1 part.
Example 4
The embodiment provides a steam-curing-free construction process of a steel-STC light combined structure bridge floor, which comprises the following steps:
step 1, preparing ingredients and preparing a premix according to the parts by weight of the paving material in the embodiment 2; the method specifically comprises the following steps: (1) paving materials are prepared according to the mass ratio: dry mixing: water =8.6:1, mixing and stirring the components except the fiber in the dry mixture and water at the rotating speed of 30r/min until the mixture is in a fluid state;
(2) then adding all the fibers, and continuously stirring for 2 min;
step 2, uniformly pouring the prepared premix on a steel bridge deck through a plurality of discharge ports;
step 3, performing jolt ramming and leveling operation, and controlling the paving thickness to be 45 mm;
and 4, paving a covering film, and performing moisture preservation and maintenance.
The relevant performance indexes of the bridge deck of the embodiment are as follows: the thickness of an STC layer on an STC combined bridge deck steel panel is 45mm, the STC compressive strength is 149.8Mpa, the breaking strength is 26.3MPa, the compressive elastic modulus is 46.2GPa, the elastic ultimate tensile strength is 9.57MPa, and the ultimate tensile strength is 11.67 MPa; the thickness of the surface layer asphalt concrete is 2.5 cm. Through calculation, the rigidity of the rear axle panel adopting the combined bridge deck is increased by 40 times, which is equivalent to the fact that the thickness of a steel panel is increased from 12mm to 40 mm. The stress is greatly reduced, wherein the transverse tensile stress of the steel panel is reduced from 100MPa to 21.9MPa (the reduction amplitude is 78%); the tensile stress of the welding seam of the panel and the longitudinal rib is reduced from 76.9MPa to 24.6MPa (the reduction amplitude is 68 percent).
The tensile stress of the STC bridge deck slab along the bridge direction is 10 MPa, and the compressive stress is 19.3 MPa; the tensile stress in the transverse bridge direction is 6.4 MPa, and the compressive stress is 10.6 MPa.
The bridge deck structure is: and paving an asphalt concrete layer with the thickness of 2.5cm and an STC layer with the thickness of 4.5cm on the steel box girder.
Example 5
The embodiment provides a steam-curing-free construction process of a steel-STC light combined structure bridge floor, which comprises the following steps:
step 1, preparing ingredients and preparing a premix according to the parts by weight of the paving material in the embodiment 3; the method specifically comprises the following steps: (1) paving materials are prepared according to the mass ratio: dry mixing: water =11.1:1, mixing and stirring the components except the fiber in the dry mixture and water at the rotating speed of 30r/min until the mixture is in a fluid state;
(2) then adding all the fibers, and continuously stirring for 2 min;
step 2, uniformly pouring the prepared premix on a steel bridge deck through a plurality of discharge ports;
step 3, performing jolt ramming and leveling operation, and controlling the paving thickness to be 50 mm;
and 4, paving a covering film, and performing moisture preservation and maintenance.
The relevant performance indexes of the bridge deck of the embodiment are as follows: the thickness of an STC layer on an STC combined bridge deck steel panel is 45mm, the STC compressive strength is 139.4Mpa, the breaking strength is 23.4MPa, the compressive elastic modulus is 46.3GPa, the elastic ultimate tensile strength is 8.53MPa, and the ultimate tensile strength is 10.34 MPa; the thickness of the surface layer asphalt concrete is 2 cm. Through calculation, the rigidity of the rear axle panel adopting the combined bridge deck is increased by 40 times, which is equivalent to the fact that the thickness of a steel panel is increased from 12mm to 40 mm. The stress is greatly reduced, wherein the transverse tensile stress of the steel panel is reduced from 100MPa to 21.9MPa (the reduction amplitude is 78%); the tensile stress of the welding seam of the panel and the longitudinal rib is reduced from 76.9MPa to 24.6MPa (the reduction amplitude is 68 percent).
The tensile stress of the STC bridge deck along the bridge direction is 10 MPa, and the compressive stress is 19.3 MPa; the tensile stress in the transverse bridge direction is 6.4 MPa, and the compressive stress is 10.6 MPa.
The bridge deck structure is: and paving an asphalt concrete layer with the thickness of 2cm and an STC layer with the thickness of 4.5cm on the steel box girder.
In summary, the bridge deck structure of the present invention has the following advantages:
1. compared with the traditional orthotropic steel bridge deck system, the local rigidity of the steel-STC light combined bridge deck structure is obviously improved. The load stress of each structural detail of the orthotropic steel bridge deck is greatly reduced, and the risk of fatigue cracking is reduced.
2. The STC layer is a permanent structure, does not need to be replaced within the service life of the whole steel-STC light combined bridge deck structure, and only needs to replace a common asphalt wearing layer with lower price.
3. Compared with other types of paving layers, the whole life cycle cost and carbon emission have overwhelming advantages. Taking the epoxy asphalt pavement commonly used at present as an example, the average price is about 1600 yuan per square meter, and the epoxy asphalt pavement is replaced once every 8 years. The STC layer is about 1800 yuan per square meter without replacement, and the wearing layer is about 80 yuan per square meter and is replaced once every 8 years. The economic advantage of steel-STC lightweight composite decks was highlighted since the 8 th year (first overhaul change). By the 50 th year (the minimum design service life of the STC layer), the total cost of the steel-STC light combined bridge deck pavement material is less than one fourth of the total cost of the steel-STC light combined bridge deck pavement material.
4. The steam-curing-free process can save steam-curing equipment, reduce construction difficulty, save a large amount of energy, reduce carbon emission and has more obvious economic advantages and environmental protection advantages.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a light-duty integrated configuration bridge deck pavement material of steel-STC which characterized in that: the composition comprises the following components in parts by weight: p.o42.5 ordinary portland cement: 2035 parts of a carrier; fly ash: 10-25 parts; calcium carbonate whisker: 0.4-1 part; micro silicon powder: 5-10 parts; 100-200 mesh quartz powder: 10-20 parts; 40-100 mesh quartz sand: 10-20 parts; copper-plated steel fiber: 1-8 parts; polycarboxylic acid high-performance water reducing agent: 0.4-1 part; water: 7-15 parts.
2. A steel-STC light composite deck pavement according to claim 1, wherein: the steel-STC light composite structure bridge deck pavement material further comprises: 5-20 parts of sulphoaluminate cement, 5-20 parts of ferro-aluminate cement, 30-35 parts of phosphoaluminate cement, 5-15 parts of ground slag, 0.01-0.1 part of nano silicon dioxide, 1-3 parts of PP fiber, 0.5-2 parts of PE fiber, 2-5 parts of POM fiber, 0.5-2 parts of PVA fiber and 1-2 parts of basalt fiber.
3. A steel-STC light composite deck pavement according to claim 1, wherein: the composition comprises the following components in parts by weight: p.o42.5 ordinary portland cement: 30 parts of (1); fly ash: 15 parts of (1); calcium carbonate whisker: 0.6 part; micro silicon powder: 5 parts of a mixture; 100-200 mesh quartz powder: 15 parts of (1); 40-100 mesh quartz sand: 20 parts of (1); copper-plated steel fiber: 4 parts of a mixture; polycarboxylic acid high-performance water reducing agent: 0.4 part; water: 10 parts.
4. A steel-STC light composite deck pavement according to claim 1, wherein: the composition comprises the following components in parts by weight: p.o42.5 ordinary portland cement: 25 parts of (1); fly ash: 15 parts of (1); calcium carbonate whisker: 0.4 part; micro silicon powder: 8 parts of a mixture; 100-200 mesh quartz powder: 20 parts of (1); 40-100 mesh quartz sand: 15 parts of (1); copper-plated steel fiber: 3 parts, POM fiber: 3 parts of basalt fiber: 1.8 parts; polycarboxylic acid high-performance water reducing agent: 0.8 part; water: 8 parts.
5. A steel-STC light composite deck pavement according to claim 1, wherein: p.o42.5 ordinary portland cement: 20 parts of (1); 5 parts of sulphoaluminate cement; 5 parts of ferro-aluminate cement; grinding slag: 9 parts of (1); nano silicon dioxide: 0.1 part; fly ash: 20 parts of (1); calcium carbonate whisker: 1 part; micro silicon powder: 10 parts of (A); 100-200 mesh quartz powder: 17 parts of (1); 40-100 mesh quartz sand: 18 parts of a mixture; copper-plated steel fiber: 2 parts of (1); polycarboxylic acid high-performance water reducing agent: 0.6 part; water: 10 parts of (A); PP fiber: 1.3 parts; PE fiber: 1 part; PVA fiber: 1 part.
6. The steam-curing-free construction process of the steel-STC light combined structure bridge floor is characterized by comprising the following steps of: the method comprises the following steps:
step 1, preparing ingredients and preparing premix according to the weight parts of the paving material;
step 2, uniformly paving the prepared premix on a steel bridge deck;
step 3, performing jolt ramming and leveling operation, and controlling the paving thickness to be 45 +/-0.5 mm;
and 4, paving a covering film, and performing moisture preservation and maintenance.
7. The steam-curing-free construction process of the steel-STC light composite structural bridge floor as claimed in claim 6, wherein the steam-curing-free construction process comprises the following steps: the process for preparing the premix in the step 1 comprises the following steps:
(1) paving materials are prepared according to the mass ratio: dry mixing: water = (7-12): 1, mixing and stirring the components except the fiber in the dry mixture and water at the rotating speed of 20-30 r/min until the mixture is in a fluid state;
(2) then adding fiber, and continuing stirring for 1-2min to obtain the final product.
8. The utility model provides a light-duty integrated configuration bridge floor of steel-STC which characterized in that: is obtained by the steam-curing-free construction process of claim 6 or 7.
9. A steel-STC lightweight composite deck, according to claim 8, wherein: the bridge deck is provided with an asphalt concrete layer, and the asphalt concrete layer is provided with an STC layer.
10. A steel-STC lightweight composite deck, according to claim 9, wherein: the asphalt concrete layer was 2cm thick.
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Cited By (1)
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| CN117886528A (en) * | 2024-03-18 | 2024-04-16 | 中国电建集团西北勘测设计研究院有限公司 | Aggregate alkali-inhibiting active material and preparation method thereof |
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