CN114277677A - Novel rigid-flexible composite steel bridge deck pavement structure and pavement method thereof - Google Patents
Novel rigid-flexible composite steel bridge deck pavement structure and pavement method thereof Download PDFInfo
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Abstract
The invention relates to the field of steel bridge deck pavement engineering, in particular to a novel rigid-flexible composite steel bridge deck pavement structure and a pavement method thereof. The technical points are as follows: the concrete is characterized by comprising a second-order epoxy waterproof bonding layer, a GA10 cast asphalt concrete layer, a normal temperature type resin bonding layer and a RSMA10 normal temperature curing resin concrete layer which are sequentially paved on a steel bridge deck. In the steel bridge deck pavement structure, the lower-layer GA10 cast asphalt concrete has good deformation compliance, effective bonding with a steel plate is ensured, and the pavement integrity is improved; the upper RSMA10 normal temperature curing type resin concrete has excellent high temperature stability, and can ensure that no track appears at high temperature in summer when paved; secondly, the RSMA10 has larger structural depth, so that the skid resistance of the pavement structure is superior to that of the traditional EA10 hot-mix epoxy asphalt concrete; meanwhile, the RSMA10 normal temperature curing resin concrete has low requirement on construction temperature, does not generate smoke dust during normal temperature construction, and is green and environment-friendly.
Description
Technical Field
The invention relates to the technical field of steel bridge deck pavement, in particular to a novel rigid-flexible composite steel bridge deck pavement structure and a pavement method thereof.
Background
The steel bridge deck pavement is a research hotspot in the field of road bridges, and as a structure for directly bearing vehicle loads, the steel bridge deck pavement not only has the function of vehicle driving, but also can effectively protect the main structure of a steel bridge deck against abrasion and erosion of rainwater.
The traditional pouring type and modified asphalt SMA paving structures have the problem of insufficient high-temperature performance, and are very easy to generate ruts under the coupling action of high temperature in summer and vehicle load. The hot-mixed epoxy pavement has good high-temperature stability, but the problem of exposure of the steel plate at the bottom of the pavement due to insufficient anti-skid performance and easy formation of through cracks is solved.
In view of the defects existing in the existing steel bridge deck pavement, the inventor develops a novel rigid-flexible composite steel bridge deck pavement structure and a pavement method thereof based on years of abundant experience and professional knowledge of the materials, and by matching with theoretical analysis and research and innovation, the skid resistance and the service life of pavement are improved through reasonable structural design and material innovation.
Disclosure of Invention
The first purpose of the invention is to provide a novel rigid-flexible composite steel bridge deck pavement structure, which takes a cast asphalt mixture as a lower surface layer to obtain good deformation following performance and crack resistance; the normal temperature solidified resin SMA is used as the upper surface layer to obtain good high temperature stability and anti-skid property.
The technical purpose of the invention is realized by the following technical scheme:
the invention provides a novel rigid-flexible composite steel bridge deck pavement structure, wherein a second-order epoxy waterproof adhesive layer, a GA10 cast asphalt concrete lower surface layer, a normal temperature type resin adhesive layer and a RSMA10 normal temperature cured resin concrete upper surface layer are sequentially paved on the surface of a steel panel from bottom to top;
the RSMA10 normal temperature curing resin concrete upper layer comprises the following components in parts by weight:
7-10 parts of normal temperature curing resin cementing material, 90-93 parts of mineral aggregate and 0.3-0.6 part of fiber; the mineral aggregate comprises aggregates and mineral powder with different particle sizes.
According to the invention, the flexible GA10 cast asphalt concrete is used as a lower surface layer, and the rigid RSMA10 normal temperature cured resin concrete upper surface layer is matched, so that not only is good deformation following performance of pavement ensured, but also no rutting is ensured to be generated at high temperature in summer due to the excellent high-temperature stability of the RSMA10 normal temperature cured resin concrete upper surface layer.
The RSMA10 has larger structural depth, and obtains excellent anti-skid performance through the combination of the epoxy mixture and the SMA gradation.
Further, the GA10 cast asphalt concrete lower surface layer comprises the following components in parts by weight: 10-20 parts of a pouring asphalt cement, 80-90 parts of a mineral aggregate and 0.3-1 part of an external additive; the mineral aggregate comprises aggregates and mineral powder with different particle sizes.
Further, the normal temperature curing resin concrete is in SMA gradation.
Further, the mineral powder is limestone mineral powder.
Furthermore, the aggregate comprises coarse aggregate and fine aggregate, and is formed by crushing basalt.
Further, the cast asphalt cement is composed of straight-run 30# asphalt and TLA lake asphalt according to the mass ratio of (7:3) - (6: 4).
Further, the external admixture is a composite synergistic warm mixing agent, and comprises the following specific components in parts by weight: 6-12 parts of oleyl alcohol, 1-6 parts of acrylamide or an epoxide thereof, 0.1-1 part of petroleum resin and 0.1-2 parts of epoxy stearyl acrylate.
Furthermore, basalt macadam is scattered on the lower surface layer of the GA10 cast asphalt concrete, the particle size of the macadam is 13-20 mm, and the scattering amount is 10-12 kg/m2。
Further, the normal-temperature curing type resin cementing material consists of a component A and a component B, wherein the mass ratio of the component A to the component B is (4.5-5): 1.
Further, the component A comprises the following components in parts by weight: 100 parts of bisphenol A type glycidyl ether epoxy resin and 10-15 parts of inactive epoxy resin diluent; the component B comprises: 80-90 parts of curing agent and 1-2 parts of defoaming agent.
Further, the curing agent is one or a combination of several of anhydride compound, ester and amide.
Furthermore, the curing agent comprises 75-85 parts by weight of methyl tetrahydrophthalic anhydride, 3-5 parts by weight of 2-ethyl-4-methylimidazole and 2-5 parts by weight of phenylsulfonamide.
The invention provides a novel normal-temperature curing agent, 2-ethyl-4-methylimidazole is used as an accelerator, and phenylsulfonamide has an amide group and contains a benzene sulfonic group, so that the bonding strength between a normal-temperature resin bonding layer and an RSMA10 normal-temperature cured resin concrete upper layer is greatly improved, the flexible lower layer and the rigid upper layer are prevented from being peeled off after being stressed, and the interlayer peeling resistance is improved.
Further, the fibers are wood fibers.
The second purpose of the invention is to provide a paving method of a novel rigid-flexible composite steel bridge deck paving structure, which has the same technical effect.
The technical purpose of the invention is realized by the following technical scheme:
the paving method of the novel rigid-flexible composite steel bridge deck paving structure specifically comprises the following operation steps:
s1, performing sand blasting and rust removing treatment on the steel plate, and spraying an epoxy zinc-rich anti-corrosion primer;
s2, cleaning the epoxy zinc-rich surface, and coating a second-order epoxy resin waterproof bonding layer;
s3, preparing GA10 cast asphalt concrete, and paving by adopting an asphalt paver;
s4, wrapping the broken stone with a second-order epoxy resin binder; uniformly spreading the pre-wrapped macadam on the surface of GA10 cast asphalt concrete to make the macadam naturally sink;
s5, after the GA10 cast asphalt concrete is cooled and hardened, coating a normal temperature resin binder on the surface of the GA10 cast asphalt concrete;
s6, preparing RSMA10 normal temperature curing resin asphalt concrete, paving the RSMA10 normal temperature curing resin asphalt concrete on the surface of the GA10 cast asphalt concrete layer coated with the normal temperature resin binding material, and after rolling, sealing and curing at normal temperature for 3-5 days to open traffic.
Further, in the step S1, the steel plate is subjected to sand blasting and rust removing treatment, the cleanliness is required to be more than Sa2.5 grade, and the roughness is more than 60 mu m.
Further, in step S2, the coating weight of the second-order epoxy resin waterproof bonding layer is 0.4-0.6 kg/m2。
Further, in step S3, an asphalt spreader is used to perform paving, and to assist in manually controlling the paving thickness and the flatness.
Further, after the pre-mixing in the step S4, the crushed stone is naturally cooled, and each crushed stone is ensured to be dispersed and not to be bonded.
Further, in step S4, the amount of the second-order epoxy resin binder is 0.5 to 1.2%, and the particle size of the premixed resin crushed stone is 13 to 20 mm.
Further, in step S5, the coating amount of the normal temperature type resin binder is 0.5-0.6 kg/m2。
Further, in step S6, the normal temperature curing type resin concrete RSMA10 is paved on the surface of the GA10 cast type asphalt concrete layer coated with the normal temperature type resin binder by using a conventional asphalt mixture paving device, rolling is performed for 4-6 times by using a 30t rubber-tyred roller, and after completion, the traffic can be opened after the normal temperature closed curing is performed for 3-5 days.
In conclusion, the invention has the following beneficial effects:
the novel rigid-flexible composite steel bridge deck pavement structure provided by the invention has the characteristics of good high-temperature performance and excellent deformation following performance of the traditional rigid-flexible composite steel bridge deck, and meanwhile, the pavement upper surface layer adopts the normal-temperature cured resin mixture RSMA10 to replace the traditional hot-mix epoxy asphalt mixture EA10, so that the novel rigid-flexible composite steel bridge deck pavement structure has the advantages of convenience in construction and environmental friendliness. The normal temperature curing resin concrete of the upper surface layer adopts SMA gradation, has larger construction depth, and solves the defect of insufficient skid resistance of epoxy pavement.
Detailed Description
To further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose, the detailed description of the embodiments, features and effects of the novel rigid-flexible composite steel bridge deck pavement structure and the pavement method thereof according to the present invention is as follows.
Sources of raw materials used in the examples:
lake asphalt: trinidad lake asphalt;
30# asphalt: china petrochemical Co., Ltd;
second-order epoxy resin: jiangsu middle road traffic science and technology company;
normal temperature type resin binder: jiangsu middle road traffic science and technology company;
compound synergistic warm-mixing agent: jiangsu middle road traffic science and technology company;
mineral aggregates in RSMA 10:
cold mixing high-toughness resin;
mineral powder: shanghai Tianfu mineral powder science and technology.
In the present embodiment, the GA10 grading range of the cast asphalt concrete is shown in table 1; the gradation range of mineral aggregate in the ambient temperature curing resin concrete RSMA10 is shown in table 2.
TABLE 1 GA10 grading Range for cast asphalt concrete
TABLE 2 Normal temperature curing resin concrete RSMA10 grading range
Example 1: novel rigid-flexible composite steel bridge deck pavement structure and pavement method thereof
The novel rigid-flexible composite steel bridge deck pavement structure provided in the embodiment is sequentially paved with a second-order epoxy waterproof adhesive layer, a GA10 cast asphalt concrete lower surface layer, a normal temperature type resin adhesive layer and a RSMA10 normal temperature cured resin concrete upper surface layer from bottom to top.
Wherein, according to the weight portion, the GA10 cast asphalt concrete lower surface layer comprises the following components: 12 parts of pouring asphalt cement, 88 parts of mineral aggregate and 1 part of external admixture; the mineral aggregate comprises aggregates and mineral powder with different particle sizes, the lower surface layer is spread with basalt broken stone, the particle size of the broken stone is 13-20 mm, and the spreading amount is 12kg/m2。
Wherein, calculated according to the weight portion, the RSMA10 normal temperature curing type resin concrete upper layer comprises the following components: 10 parts of normal temperature curing resin cementing material, 90 parts of mineral aggregate and 0.6 part of fiber; the mineral aggregate comprises aggregates and mineral powder with different particle sizes.
Wherein, the novel rigid-flexible composite steel bridge deck pavement structure adopts second-order epoxy resin as a waterproof bonding layer, and the coating weight is 0.6kg/m2。
Wherein, the novel rigid-flexible composite steel bridge deck pavement structure adopts a normal temperature resin binder to bond the upper and lower surface layers, and the coating weight is 0.55kg/m2。
The paving method comprises the following steps:
s1, performing sand blasting and rust removing treatment on the steel plate, wherein the cleanliness is required to be more than Sa2.5 grade, the roughness is more than 60 mu m, and spraying epoxy zinc-rich anti-corrosion primer;
s2, cleaning the epoxy zinc-rich surface, coating a second-order epoxy resin waterproof bonding layer with the coating weight of 0.6kg/m2；
S3, preparing GA10 cast asphalt concrete, paving by adopting an asphalt paver, and assisting in manually controlling the paving thickness and the paving flatness;
s4, wrapping the crushed stone with a second-order epoxy resin binder, wherein the using amount of the second-order epoxy resin binder is 1.2% of the mass of the crushed stone, and the particle size of the premixed resin crushed stone is 13-20 mm; naturally cooling the crushed stones after the pre-mixing is finished, and ensuring that each crushed stone is dispersed and not bonded; and uniformly spreading the pre-coated crushed stone on the surface of the GA10 cast asphalt concrete to enable the crushed stone to naturally sink.
S5, after the GA10 pouring type asphalt concrete is cooled and hardened, coating the normal temperature type resin binder on the surface of the concrete, wherein the coating weight is 0.55kg/m2。
S6, preparing RSMA10 normal temperature curing resin asphalt concrete, paving the RSMA10 normal temperature curing resin asphalt concrete on the surface of the GA10 cast asphalt concrete layer coated with the normal temperature resin binder by adopting conventional asphalt mixture paving equipment, rolling for 5 times by adopting a 30t rubber-wheel road roller, and sealing and curing at normal temperature for 5 days to open traffic.
Example 2: novel rigid-flexible composite steel bridge deck pavement structure and pavement method thereof
The novel rigid-flexible composite steel bridge deck pavement structure provided in the embodiment is sequentially paved with a second-order epoxy waterproof adhesive layer, a GA10 cast asphalt concrete lower surface layer, a normal temperature type resin adhesive layer and a RSMA10 normal temperature cured resin concrete upper surface layer from bottom to top.
Wherein, according to the weight portion, the GA10 cast asphalt concrete lower surface layer comprises the following components: 10 parts of pouring asphalt cement, 90 parts of mineral aggregate and 0.4 part of external admixture; the mineral aggregate comprises aggregates and mineral powder with different particle sizes. Spraying basalt macadam on the lower surface layer, wherein the particle size of the macadam is 13-20 mm, and the spraying amount is 10kg/m2。
Wherein, calculated according to the weight portion, the RSMA10 normal temperature curing type resin concrete upper layer comprises the following components: 8 parts of normal temperature curing resin cementing material, 92 parts of mineral aggregate and 0.4 part of fiber; the mineral aggregate comprises aggregates and mineral powder with different particle sizes.
The normal-temperature curing resin cementing material consists of a component A and a component B, wherein the mass ratio of the component A to the component B is 5: 1; the component A comprises the following components in parts by weight: 100 parts of bisphenol A type glycidyl ether epoxy resin and 15 parts of inactive epoxy resin diluent; the component B comprises: 90 parts of curing agent and 1 part of defoaming agent;
wherein, the curing agent consists of 85 parts of methyl tetrahydrophthalic anhydride, 5 parts of 2-ethyl-4-methylimidazole and 5 parts of phenylsulfonamide by weight.
Wherein, the novel rigid-flexible composite steel bridge deck pavement structure adopts second-order epoxy resin as a waterproof bonding layer, and the coating weight is 0.5kg/m2。
Wherein, the novel rigid-flexible composite steel bridge deck pavement structure adopts a normal temperature resin binder to bond the upper and lower surface layers, and the coating weight is 0.5kg/m2。
The paving method comprises the following steps:
s1, performing sand blasting and rust removing treatment on the steel plate, wherein the cleanliness is required to be more than Sa2.5 grade, the roughness is more than 60 mu m, and spraying epoxy zinc-rich anti-corrosion primer;
s2, cleaning the epoxy zinc-rich surface, coating a second-order epoxy resin waterproof bonding layer with the coating weight of 0.5kg/m2；
S3, preparing GA10 cast asphalt concrete, paving by adopting an asphalt paver, and assisting in manually controlling the paving thickness and the paving flatness;
s4, wrapping the crushed stone with a second-order epoxy resin binder, wherein the using amount of the second-order epoxy resin binder is 0.8% of the mass of the crushed stone, and the particle size of the premixed resin crushed stone is 13-20 mm; naturally cooling the crushed stones after the pre-mixing is finished, and ensuring that each crushed stone is dispersed and not bonded; and uniformly spreading the pre-coated crushed stone on the surface of the GA10 cast asphalt concrete to enable the crushed stone to naturally sink.
S5, after GA10 pouring type asphalt concrete is cooled and hardened, coating normal temperature type resin binder on the surface of the asphalt concrete, wherein the coating weight is 0.5kg/m2。
S6, preparing RSMA10 normal temperature curing resin asphalt concrete, paving the RSMA10 normal temperature curing resin asphalt concrete on the surface of the GA10 cast asphalt concrete layer coated with the normal temperature resin binder by adopting conventional asphalt mixture paving equipment, rolling for 4 times by adopting a 30t rubber-wheel road roller, and then sealing and curing at normal temperature for 3 days to open traffic.
And (3) performance testing: the performance of the novel rigid-flexible composite steel bridge deck pavement structure in the embodiment 1-2 is tested according to JTG E20-2011 test procedure for asphalt and asphalt mixtures for highway engineering, and the results are shown in tables 2-5.
TABLE 3 Performance index parameters of the lower layer of GA10 cast asphalt concrete of examples 1-2
| Performance index | Example 1 | Example 2 |
| Bulk relative density | 1.903 | 1.875 |
| Penetration/mm | 1.4 | 1.3 |
| Fluidity/s | 17 | 19 |
| Dynamic stability at 60 deg.C/(degree/mm) | 636 | 574 |
| -10 ℃ bending failure strain/. mu.epsilon | 3577 | 3902 |
| 15 ℃ 10Hz dynamic modulus/MPa | 8757 | 8805 |
TABLE 4 index parameters of the upper layer of the RSMA10 ambient temperature curing resin concrete of examples 1-2
| Performance index | Example 1 | Example 2 |
| Marshall stability/KN at 70 ℃ after curing | 56.2 | 51.8 |
| Flow value/0.1 mm | 32.5 | 36.3 |
| Dynamic stability at 60 deg.C/(degree/mm) | ＞20000 | ＞20000 |
| -10 ℃ bending failure strain/. mu.epsilon | 8644 | 8715 |
| Marshall stability% of soaking residue | 98.5 | 98.1 |
| Freeze-thaw cleavage strength ratio/%) | 91.1 | 92.4 |
| Depth of formation/mm | 0.99 | 0.97 |
| Coefficient of friction/BPN | 69 | 68 |
TABLE 5 comparison of paving Structure Performance
From the above table, it can be seen that:
(1) the rigid-flexible composite pavement structure provided by the invention has good high-temperature performance, and the dynamic stability at 60 ℃ is more than 20000 times/mm.
(2) The dynamic modulus of the rigid-flexible composite pavement structure provided by the invention is larger than that of a common cast asphalt mixture under the condition that the temperature is 15 ℃ and the frequency is 10Hz and is closest to the service state of a road surface.
(3) The structural depth of the paved upper surface layer RSMA10 is close to 1mm, and the friction coefficient is close to 70BPN, which shows that the rigid-flexible composite pavement provided by the invention has good anti-skid performance.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A novel rigid-flexible composite steel bridge deck pavement structure is characterized in that a second-order epoxy waterproof adhesive layer, a GA10 cast asphalt concrete lower surface layer, a normal temperature type resin adhesive layer and a RSMA10 normal temperature curing resin concrete upper surface layer are sequentially paved on the surface of a steel panel from bottom to top;
the RSMA10 normal temperature curing resin concrete upper layer comprises the following components in parts by weight:
7-10 parts of normal temperature curing resin cementing material, 90-93 parts of mineral aggregate and 0.3-0.6 part of fiber; the mineral aggregate comprises aggregate with different particle sizes and mineral powder.
2. The novel rigid-flexible composite steel bridge deck pavement structure as claimed in claim 1, wherein the GA10 cast asphalt concrete lower surface layer comprises the following components in parts by weight: 10-20 parts of a pouring asphalt cement, 80-90 parts of a mineral aggregate and 0.3-1 part of an external additive; the mineral aggregate comprises aggregate with different particle sizes and mineral powder.
3. The novel rigid-flexible composite steel bridge deck pavement structure as claimed in claim 1, wherein the mineral aggregate is of SMA grade.
4. The novel rigid-flexible composite steel bridge deck pavement structure according to claim 2, wherein the admixture is a composite synergistic warm-mix agent, and comprises the following specific components in parts by weight: 6-12 parts of oleyl alcohol, 1-6 parts of acrylamide or an epoxide thereof, 0.1-1 part of petroleum resin and 0.1-2 parts of epoxy stearyl acrylate.
5. A novel rigid-flexible composite material as claimed in claim 1The steel bridge deck pavement structure is characterized in that basalt macadam is spread on the lower surface layer of the GA10 cast asphalt concrete, the particle size of the macadam is 13-20 mm, and the spreading amount is 10-12 kg/m2。
6. The novel rigid-flexible composite steel bridge deck pavement structure as claimed in claim 1, wherein the normal-temperature curing type resin cementing material is composed of a component A and a component B, and the mass ratio of the component A to the component B is (4.5-5): 1.
7. The novel rigid-flexible composite steel bridge deck pavement structure according to claim 6, wherein the component A comprises the following components in parts by weight: 100 parts of bisphenol A type glycidyl ether epoxy resin and 10-15 parts of inactive epoxy resin diluent; the component B comprises: 80-90 parts of curing agent and 1-2 parts of defoaming agent.
8. A novel rigid-flexible composite steel bridge deck pavement structure as claimed in claim 7, wherein said curing agent is one or more of anhydride compound, ester, and amide.
9. The paving method of the novel rigid-flexible composite steel bridge deck paving structure is characterized by comprising the following operation steps:
s1, performing sand blasting and rust removing treatment on the steel plate, and spraying an epoxy zinc-rich anti-corrosion primer;
s2, cleaning the epoxy zinc-rich surface, and coating a second-order epoxy resin waterproof bonding layer;
s3, preparing GA10 cast asphalt concrete, and paving by adopting an asphalt paver;
s4, wrapping the crushed stone with a second-order epoxy resin binder, and uniformly spreading the pre-wrapped crushed stone on the surface of GA10 cast asphalt concrete to enable the crushed stone to naturally sink;
s5, after the GA10 cast asphalt concrete is cooled and hardened, coating a normal temperature resin binder on the surface of the GA10 cast asphalt concrete;
s6, preparing RSMA10 normal temperature curing resin asphalt concrete, paving the RSMA10 normal temperature curing resin asphalt concrete on the surface of GA10 cast asphalt concrete coated with the normal temperature resin binding material, and after rolling, sealing and curing at normal temperature for 3-5 days to open traffic.
10. The paving method of the novel rigid-flexible composite steel bridge deck paving structure according to claim 9, wherein in the step S4, the using amount of the second-order epoxy resin binder is 0.5-1.2% of the mass of the crushed stone, and the grain size of the premixed resin crushed stone is 13-20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111671935.9A CN114277677B (en) | 2021-12-31 | 2021-12-31 | Rigid-flexible composite steel bridge deck pavement structure and pavement method thereof |
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| CN114808680A (en) * | 2022-04-22 | 2022-07-29 | 江苏中路工程技术研究院有限公司 | Open rib steel bridge deck pavement structure and preparation method thereof |
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