CN110952447A - High-toughness, durable and anti-skid steel bridge deck pavement structure and construction method thereof - Google Patents
High-toughness, durable and anti-skid steel bridge deck pavement structure and construction method thereof Download PDFInfo
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- CN110952447A CN110952447A CN201911390933.5A CN201911390933A CN110952447A CN 110952447 A CN110952447 A CN 110952447A CN 201911390933 A CN201911390933 A CN 201911390933A CN 110952447 A CN110952447 A CN 110952447A
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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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Abstract
The invention discloses a high-toughness, durable and anti-skid steel bridge deck pavement structure and a construction method thereof, wherein the steel bridge deck pavement structure comprises a steel bridge deck steel plate, a bonding bottom layer, a buffer layer, an adhesion layer and an abrasion layer are sequentially paved on the surface of the steel bridge deck steel plate from bottom to top, the buffer layer and the abrasion layer are high-toughness modified asphalt concrete consisting of aggregate, filler and asphalt cement, the thickness of the buffer layer is 1-3 cm, and the thickness of the abrasion layer is 2-3 cm. The invention has better high-temperature anti-rutting performance, anti-fatigue durability, anti-slip performance, bonding strength and deformation following performance, greatly reduces the manufacturing cost compared with the epoxy asphalt concrete engineering, and has simple construction process and convenient later maintenance.
Description
Technical Field
The invention relates to the technical field of road building materials and engineering, in particular to a high-toughness, durable and anti-skid steel bridge deck pavement structure and a construction method thereof.
Background
The steel box girder has the remarkable advantages of light dead weight, convenient erection and the like, and is widely applied to domestic and foreign bridges and municipal engineering construction. The pavement of the steel box girder bridge deck is a protective layer of the bridge deck slab and a structural layer providing a road service function, and has important effects on the durability of the bridge, the safety and the comfort of driving, and the economic and social benefits. The following requirements are put forward on the pavement layer by combining the climate environment of China, the external environment with serious overload problem and the complex stress system of the orthotropic steel bridge deck: 1) good high-temperature anti-rutting performance; 2) good low-temperature crack resistance; 3) the pavement layer is reliably bonded with the steel bridge deck; 4) the paving material provides sufficient skid resistance.
At present, the common paving schemes at home and abroad mainly comprise double-layer SMA, pouring type, epoxy, high-strength concrete and combination type.
The double-layer SMA pavement has the characteristics of mature construction process, good sliding performance, poor bonding performance and poor fatigue performance; the pouring type asphalt concrete pavement has the characteristics of low porosity, good waterproof performance, good following performance with a steel bridge deck, good coordination and deformation with a steel plate, poor high-temperature stability, high requirement on construction equipment and complex process, and is easy to generate track and other diseases; the epoxy asphalt concrete pavement has the characteristics of good bonding performance, good high-temperature stability, easy bulge and cracking, low early-stage anti-slip performance, complex construction process and high material price; the high-strength concrete pavement has the characteristics of high material rigidity, good high-temperature stability, good interlayer bonding performance, complex construction process, concrete shrinkage crack problem, stress concentration of a steel plate caused by welding shear nails, and difficulty in later maintenance.
The main factors of the problems can be summarized that the performance and the structural system of the current pavement layer material cannot be matched with the characteristics of a complex stress system, extreme temperature, serious traffic load overload and the like of a steel bridge deck steel plate.
Disclosure of Invention
The invention aims to provide a high-toughness, durable and anti-skid steel bridge deck pavement structure and a construction method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a high-toughness, durable and anti-skid steel bridge deck pavement structure, which comprises a steel bridge deck steel plate, wherein a bonding bottom layer, a buffer layer, an adhesion layer and a wearing layer are sequentially paved on the surface of the steel bridge deck steel plate from bottom to top, the buffer layer and the wearing layer are high-toughness modified asphalt concrete consisting of aggregates, fillers and asphalt cement, the thickness of the buffer layer is 1-3 cm, and the thickness of the wearing layer is 2-3 cm.
The bonding bottom layer is arranged on the steel bridge deck steel plate, provides corrosion resistance protection for the steel bridge deck steel plate, and firmly bonds the steel plate with the pavement layer structure on the steel bridge deck steel plate; the buffer layer arranged on the bonding bottom layer can resist the corrosion of oil, water and the like, has stronger adaptability to temperature conditions, forms transition between the steel plate and the wearing layer, increases the rigidity of the pavement layer and resists fatigue damage; the adhesive layer arranged on the buffer layer has the advantages of good durability and stability and is convenient to construct; the wearing layer arranged on the adhesion layer has reliable high-temperature stability, fatigue resistance, good skid resistance and low noise performance; therefore, the steel bridge deck pavement structure has good performances of cracking resistance, toughness and the like, meanwhile, the characteristics of skid resistance and noise reduction of the pavement are ensured, the requirements of deformation, rainwater and vehicle load action under high-temperature and low-temperature environments are met, the problems that the existing material is easy to crack and move, the existing material is not bonded with the original pavement structure sufficiently and the like are solved, and the durability of the thin-layer pavement is improved.
The asphalt cement enables the high-toughness modified asphalt concrete used for the buffer layer or the wearing layer to have high-temperature stability far exceeding that of cast asphalt concrete, and meanwhile, the asphalt cement has small porosity, good fatigue performance and good fatigue cracking resistance.
Further, the mass ratio of the aggregate, the filler and the asphalt cement in the buffer layer is 100: 5-8: 7.5 ~ 8.5, so, the buffer layer can better resist the erosion of oil, water etc. has stronger adaptability to the temperature condition to greatly increased the rigidity of layer of mating formation, better resist fatigue failure.
Further, the mass ratio of the aggregate, the filler and the asphalt binder in the wearing layer is 100: 6-10: 7.4-8.4, so the wearing layer has more reliable high-temperature stability, fatigue resistance, better skid resistance and lower noise performance.
Further, the maximum grain size of the aggregate and the filler in the buffer layer is 7mm, and the maximum grain size of the aggregate and the filler in the wearing layer is 9.5 mm.
The overall grading range of the aggregate and the filler in the buffer layer is shown in the following table 1:
TABLE 1 grading requirements for aggregates and fillers in buffer layers
| Screen hole (Square hole screen mm) | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Passage Rate (%) | - | 100 | 30～80 | 15～40 | 10～25 | 8～20 | 6～13 | 5～10 | 2～8 |
The aggregate and filler bulk grading ranges in the wearing course layer are shown in table 2 below:
TABLE 2 grading requirements for aggregates and fillers in wearing course
Furthermore, the oilstone ratio of the buffer layer is 7.2-8.0, and the porosity is 2% -3%, so that the high-toughness modified asphalt concrete has the high-temperature stability far exceeding that of cast asphalt concrete, and meanwhile, the high-toughness modified asphalt concrete has small porosity, good fatigue performance and good fatigue cracking resistance.
Furthermore, the oilstone ratio of the wearing layer is more than or equal to 7.0, and the porosity is 3% -4%, so that the high-toughness modified asphalt concrete has high-temperature stability far exceeding that of cast asphalt concrete, and meanwhile, the high-toughness modified asphalt concrete has small porosity, good fatigue performance and good fatigue cracking resistance.
Further, the aggregate is basalt or diabase.
Furthermore, the filler is limestone mineral powder, and the technical index requirements of the filler are shown in the following table 3:
TABLE 3 technical index requirements for fillers
Furthermore, the asphalt cement is high-viscosity high-elasticity modified asphalt, the softening point is more than or equal to 90 ℃, and the dynamic viscosity at 60 ℃ is more than or equal to 50 ten thousand Pa.s. The high-viscosity high-elasticity modified asphalt is a product of China fortune Tongda (Guangdong) road science and technology limited company, has an oilstone ratio (more than or equal to 7.0) similar to cast asphalt concrete and a unique framework continuous grading design, so that the high-toughness modified asphalt concrete for the buffer layer or the wearing layer has the high-temperature stability performance far exceeding that of the cast asphalt concrete, and meanwhile, the high-viscosity high-elasticity modified asphalt has smaller void ratio, better fatigue performance and better fatigue cracking resistance.
Furthermore, the bonding bottom layer adopts epoxy resin bonding layer oil, and the using amount of the epoxy resin bonding layer oil is 0.4-0.5 kg/m2. The selected epoxy resin adhesive layer oil has the advantages of high adhesive strength, high shear resistance and good fatigue performance. Specifically, the epoxy resin adhesive layer oil is KD-HYP adhesive layer oil of Japanese modern chemical company, and comprises a main agent and a curing agent according to the weight ratio of 1: 1, mixing and using.
Further, the adhesion layer is made of epoxy resin adhesive layer oil or high-viscosity high-elasticity modified emulsified asphalt, and when the adhesion layer is made of epoxy resin adhesive layer oil, the dosage of the epoxy resin adhesive layer oil is 0.7-0.8 kg/m2When the adhesive layer is made of high-viscosity high-elasticity modified emulsified asphalt, the spraying amount of the high-viscosity high-elasticity modified emulsified asphalt is 0.8-1.0 kg/m2。
When the adhesion layer adopts high-viscosity high-elasticity modified emulsified asphalt, the adhesion layer and the wearing layer are constructed by adopting synchronous paving equipment, so that the interlayer pollution during the separation construction is avoided, the interlayer bonding performance is ensured by synchronous construction, and the construction time is shortened.
In a second aspect, the present invention further provides a construction method of the above steel deck pavement structure, including the following steps:
(1) before construction, the sundries on the working face are cleaned, and the working face range is closed, so that the working face is ensured to be free of interference.
(2) And (3) carrying out sand blasting and rust removal on the steel bridge deck steel plate, wherein the rust removal grade is more than Sa2.5 grade, and the roughness is 80-140 mu m.
(3) Construction of a bonding bottom layer: heating the epoxy resin adhesive layer oil to 20-30 ℃, stirring for 2-4 min, uniformly coating the epoxy resin adhesive layer oil on the steel bridge deck steel plate in a manual coating or mechanical spraying mode, wherein the using amount of the epoxy resin adhesive layer oil is controlled to be 0.4-0.5 kg/m2And forming a bonding bottom layer. High temperatureThe bonding bottom layer can be coated at the temperature of 10 ℃ and the temperature of the steel bridge deck steel plate is more than 10 ℃, and the drawing strength at 25 ℃ is ensured to be more than or equal to 5 MPa.
(4) Buffer layer construction: firstly, aggregate is heated to 190-210 ℃, and is stirred for 30-45 s, then asphalt cement heated to 170-190 ℃ is added into the aggregate and is stirred for 45-60 s until the mixture is uniform, finally, filler heated to 190-210 ℃ is added, the mixture is stirred for 45-60 s until the mixture is uniform at 180 ℃, high-toughness modified asphalt concrete for a buffer layer is obtained, the buffer layer with the thickness of 1-3 cm is formed by whole spreading and rolling, the discharging temperature is 170-210 ℃, the spreading temperature is not less than 165 ℃, and the rolling temperature is not less than 150 ℃.
(5) Construction of an adhesive layer: when the adhesive layer adopts epoxy resin adhesive layer oil, the epoxy resin adhesive layer oil is heated to 20-30 ℃, stirred for 2-4 min and uniformly coated on the surface of the buffer layer in a manual coating or mechanical spraying way, and the dosage of the epoxy resin adhesive layer oil is controlled to be 0.7-0.8 kg/m2Forming an adhesion layer; when the adhesive layer adopts high-viscosity high-elasticity modified emulsified asphalt, a synchronous paver with spraying is adopted to spray the high-viscosity high-elasticity modified emulsified asphalt according to the spraying amount of 0.8-1.0 kg/m2And synchronously paving with the wearing layer to form an adhesive layer on the buffer layer.
(6) Construction of a wearing layer: firstly, heating aggregate to 180-210 ℃, stirring for 30-45 s, then adding asphalt cement heated to 180-200 ℃ into the aggregate, stirring for 45-60 s to be uniform, finally adding filler heated to 190-210 ℃, stirring for 45-60 s to be uniform at 180 ℃ to obtain high-toughness modified asphalt concrete for an abrasion layer, and forming the abrasion layer with the thickness of 2-3 cm by whole spreading and rolling, wherein the discharging temperature is 170-210 ℃, the spreading temperature is not less than 165 ℃, and the rolling temperature is not less than 150 ℃.
Compared with the prior art, the invention provides a high-toughness, durable and anti-skid steel bridge deck pavement structure and a construction method thereof, and the steel bridge deck pavement structure has the following beneficial effects:
(1) the buffer layer of the invention adopts special high-toughness modified asphalt concrete, the high-temperature stability is far higher than that of cast asphalt concrete, the void ratio is small, the good following performance with the steel bridge deck can be ensured, and the fatigue performance and the durability are good;
(2) the high-viscosity high-elasticity modified emulsified asphalt or epoxy resin adhesive layer oil is used as an adhesive layer, so that the adhesive layer has good adhesive property and can further prevent water from seeping downwards;
(3) the wearing layer adopts special high-toughness modified asphalt concrete, selects high-viscosity high-elasticity modified asphalt and optimizes the mix proportion design, so that the high-temperature rutting resistance and the fatigue cracking resistance of the pavement layer are obviously improved, meanwhile, the wearing layer adopts special framework continuous gradation, the surface structure depth after molding is large, the friction coefficient is high, the internal structure is compact, the void ratio is small, the anti-skid property and the water sealing capacity are good, the waterproof effect is good, the problems of insufficient anti-skid property, bulging and the like in the early stage of the epoxy asphalt concrete can be solved, the service life of the pavement bridge deck layer is greatly prolonged, the construction process is simple, and the construction quality is ensured;
(4) the waterproof bonding system of the present invention comprises: the waterproof and adhesive material epoxy resin adhesive layer oil of the adhesive bottom layer, the high-viscosity high-elasticity modified emulsified asphalt or epoxy resin adhesive layer oil of the adhesive layer, and the compact waterproof structure of the buffer layer and the wearing layer.
(5) The invention has simple process and convenient construction, and the paving structure of the steel bridge deck with the thickness of 5cm has the price of 500 yuan/m2Compared with the pouring type asphalt concrete pavement (900 yuan/m) adopting special lake asphalt2) And epoxy asphalt concrete pavement (1500 yuan/m)2) And the construction cost is greatly saved, and the later maintenance is facilitated.
Detailed Description
The technical solutions of the present invention will be described clearly and completely by the detailed embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment provides a steel bridge deck pavement structure of high toughness, durability, skid resistance, including steel bridge deck steel sheet, the surface of steel bridge deck steel sheet has laid bonding bottom layer, buffer layer, adhesion layer and wearing and tearing layer by from bottom to top in proper order, and buffer layer and wearing and tearing layer are the high toughness modified asphalt concrete who comprises aggregate, filler and asphalt cement, and the mass ratio of aggregate, filler and asphalt cement in the buffer layer is 100: 5: 7.6, the mass ratio of the aggregate, the filler and the asphalt cement in the wearing layer is 100: 6: 7.8.
wherein, the bonding bottom layer and the adhesion layer both adopt epoxy resin bonding layer oil produced by Japanese modern chemical company, the model is KD-HYP, and the weight ratio is 1: 1, mixing a main agent and a curing agent; diabase is used as aggregate, limestone mineral powder is used as filler; the asphalt cement is high-viscosity high-elasticity modified asphalt produced by Huayuntong (Guangdong) road science and technology limited company, the softening point is more than or equal to 90 ℃, and the dynamic viscosity at 60 ℃ is more than or equal to 50 ten thousand Pa.s. The thickness of the buffer layer is 2cm, the maximum grain size of the aggregate and the filler in the buffer layer is 7mm, the oilstone ratio of the buffer layer is 7.2-8.0, and the porosity is 2% -3%; the thickness of the wearing layer is 3cm, the maximum grain size of aggregate and filler in the wearing layer is 9.5mm, the oilstone ratio of the wearing layer is not less than 7.0, and the porosity is 3% -4%.
The construction method of the steel bridge deck pavement structure comprises the following steps:
(1) before construction, the sundries on the working face are cleaned, and the working face range is closed, so that the working face is ensured to be free of interference.
(2) And (3) carrying out sand blasting and rust removal on the steel bridge deck steel plate, wherein the rust removal grade is required to be more than Sa2.5 grade, and the roughness is 80-140 mu m.
(3) Construction of a bonding bottom layer: the construction adhesive bottom layer can be coated only when the temperature is higher than 10 ℃ and the temperature of the steel bridge deck steel plate is higher than 10 ℃, and the drawing strength at 25 ℃ is ensured to be more than or equal to 5 MPa. During construction, the main agent and the curing agent in the epoxy resin adhesive layer oil are heated to 20-30 ℃, and then the main agent and the curing agent are mixed according to the weight ratio of 1: 1 stirring for 2-4 min by an electric stirrer, uniformly coating on a steel bridge deck steel plate by manual brushing or mechanical spraying, and controlling the using amount of epoxy resin adhesive layer oil to be 0.5kg/m2And forming a bonding bottom layer. The drawing strength of the bonding bottom layer and the steel plate is 5.8 MPa.
(4) Buffer layer construction: firstly, aggregate is heated to 200 ℃ and stirred for 30s, then high-viscosity high-elasticity modified asphalt heated to 180 ℃ is added into the aggregate and stirred for 45s to be uniform, finally, filler heated to 190 ℃ is added, the mixture is stirred for 60s to be uniform at 180 ℃, high-toughness modified asphalt concrete for buffer layer construction is obtained, a buffer layer with the thickness of 2cm is formed by whole-width paving and rolling, the discharging temperature is 170-210 ℃, the paving temperature is 165 ℃, the rolling temperature is 150 ℃, a 9-13-ton double-steel-wheel road roller is adopted for rolling, and a rubber-wheel road roller is forbidden. The grading of the buffer layer is shown in table 4 below:
TABLE 4 grading requirements for aggregates and fillers in buffer layers
| Screen hole (Square hole screen mm) | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Passage Rate (%) | - | 100 | 62 | 22 | 18 | 13 | 10 | 8 | 6 |
(5) Construction of an adhesive layer: the adhesion layer adopts epoxy resin to bond the layer oil, can guarantee that the interlaminar bonding pull strength is more than or equal to 1 MPa. When the adhesive layer is constructed, firstly heating the main agent and the curing agent in the epoxy resin adhesive layer oil to 20-30 ℃, and then mixing the main agent and the curing agent according to the weight ratio of 1: 1 stirring for 2-4 min by an electric stirrer, uniformly coating on the surface of the buffer layer by manual coating or mechanical spraying, and controlling the using amount of epoxy resin adhesive layer oil at 0.8kg/m2And forming an adhesion layer.
(6) Construction of a wearing layer: after the construction of the adhesion layer, firstly heating the aggregate to 190 ℃, stirring for 30s, then adding the high-viscosity high-elasticity modified asphalt heated to 190 ℃ into the aggregate, stirring for 45s to be uniform, finally adding the filler heated to 190 ℃, stirring for 60s to be uniform at 180 ℃ to obtain the high-toughness modified asphalt concrete for the wearing layer, paving and rolling the whole to form the wearing layer with the thickness of 3cm, wherein the discharging temperature is 170-210 ℃, the paving temperature is 165 ℃, the rolling temperature is 150 ℃, and the rolling is carried out by adopting a 9-13-ton double-steel-wheel road roller. The wear layer grading is shown in table 5 below:
TABLE 5 grading requirements for aggregates and fillers in wearing course
| Screen hole (Square hole screen mm) | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Passage Rate (%) | 100 | 90 | 65 | 25 | 16 | 14 | 11 | 8 | 7 |
Example 2
The embodiment provides a steel bridge deck pavement structure of high toughness, durability, skid resistance, including steel bridge deck steel sheet, the surface of steel bridge deck steel sheet has laid bonding bottom layer, buffer layer, adhesion layer and wearing and tearing layer by from bottom to top in proper order, and buffer layer and wearing and tearing layer are the high toughness modified asphalt concrete who comprises aggregate, filler and asphalt cement, and the mass ratio of aggregate, filler and asphalt cement in the buffer layer is 100: 5: 7.8, the mass ratio of the aggregate, the filler and the asphalt cement in the wearing layer is 100: 6: 8.0.
wherein the bonding bottom layer adopts epoxy resin bonding oil produced by Japanese modern chemical company, the model is KD-HYP, and the weight ratio is 1: 1, mixing a main agent and a curing agent; the adhesive layer adopts high-viscosity high-elasticity modified emulsified asphalt of a commercial product; diabase is used as aggregate, limestone mineral powder is used as filler; the asphalt cement is high-viscosity high-elasticity modified asphalt produced by Huayuntong (Guangdong) road science and technology limited company, the softening point is more than or equal to 90 ℃, and the dynamic viscosity at 60 ℃ is more than or equal to 50 ten thousand Pa.s. The thickness of the buffer layer is 2.5cm, the maximum grain size of the aggregate and the filler in the buffer layer is 7mm, the oilstone ratio of the buffer layer is 7.2-8.0, and the porosity is 2% -3%; the thickness of the wearing layer is 2.5cm, the maximum grain size of the aggregate and the filler in the wearing layer is 9.5mm, the oilstone ratio of the wearing layer is not less than 7.0, and the porosity is 3-4%.
The construction method of the steel bridge deck pavement structure comprises the following steps:
(1) before construction, the sundries on the working face are cleaned, and the working face range is closed, so that the working face is ensured to be free of interference.
(2) And (3) carrying out sand blasting and rust removal on the steel bridge deck steel plate, wherein the rust removal grade is required to be more than Sa2.5 grade, and the roughness is 80-140 mu m.
(3) Construction of a bonding bottom layer: the construction adhesive bottom layer can be coated only when the temperature is higher than 10 ℃ and the temperature of the steel bridge deck steel plate is higher than 10 ℃, and the drawing strength at 25 ℃ is ensured to be more than or equal to 5 MPa. During construction, the main agent and the curing agent in the epoxy resin adhesive layer oil are heated to 20-30 ℃, and then the main agent and the curing agent are mixed according to the weight ratio of 1: 1 stirring for 2-4 min by an electric stirrer, uniformly coating on a steel bridge deck steel plate by manual brushing or mechanical spraying, and controlling the using amount of epoxy resin adhesive layer oil to be 0.4kg/m2And forming a bonding bottom layer. The drawing strength of the bonding bottom layer and the steel plate is 5.6 MPa.
(4) Buffer layer construction: firstly, aggregate is heated to 190 ℃ and stirred for 30s, then high-viscosity high-elasticity modified asphalt heated to 180 ℃ is added into the aggregate and stirred for 60s to be uniform, finally, filler heated to 190 ℃ is added, the mixture is stirred for 45s to be uniform at 180 ℃ to obtain high-toughness modified asphalt concrete for buffer layer construction, a buffer layer with the thickness of 2.5cm is formed by whole-width paving and rolling, the discharging temperature is 170-210 ℃, the paving temperature is 165 ℃, the rolling temperature is 150 ℃, a 9-13-ton double-steel-wheel road roller is adopted for rolling, and a rubber-wheel road roller is strictly forbidden. The grading of the buffer layer is shown in table 6 below:
TABLE 6 grading requirements for aggregates and fillers in buffer layers
| Screen hole (Square hole screen mm) | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Passage Rate (%) | - | 100 | 58 | 20 | 16 | 12 | 9 | 8 | 6 |
(5) Construction of an adhesive layer: the adhesive layer is made of high-viscosity high-elasticity modified emulsified asphalt, and when the adhesive layer is constructed, a synchronous construction process is adopted, and the spraying amount is 1.0kg/m through a Fowler S1800-3SJ synchronous paver with spraying2And the buffer layer and the wearing layer are synchronously paved to form an adhesion layer on the buffer layer, so that the pollution between layers during the separation construction is avoided, the adhesion performance between layers is ensured during the synchronous construction, and the construction time is also shortened.
(6) Construction of a wearing layer: after the construction of the adhesive layer, firstly heating the aggregate to 195 ℃, stirring for 30s, then adding the high-viscosity high-elasticity modified asphalt heated to 180 ℃ into the aggregate, stirring for 45s to be uniform, finally adding the filler heated to 190 ℃, stirring for 60s to be uniform at 180 ℃ to obtain the high-toughness modified asphalt concrete for the wearing layer, and adopting a full-width paving and rolling to form the wearing layer with the thickness of 2.5cm, wherein the discharging temperature is 170-210 ℃, the paving temperature is 165 ℃, the rolling temperature is 150 ℃, and the rolling adopts a 9-13-ton double-steel-wheel road roller. The wear layer grading is shown in table 7 below:
TABLE 7 gradation requirements for aggregates and fillers in wearing course
| Screen hole (Square hole screen mm) | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Passage Rate (%) | 100 | 88 | 63 | 22 | 18 | 15 | 12 | 10 | 8 |
Example 3
The embodiment provides a steel bridge deck pavement structure of high toughness, durability, skid resistance, including steel bridge deck steel sheet, the surface of steel bridge deck steel sheet has laid bonding bottom layer, buffer layer, adhesion layer and wearing and tearing layer by from bottom to top in proper order, and buffer layer and wearing and tearing layer are the high toughness modified asphalt concrete who comprises aggregate, filler and asphalt cement, and the mass ratio of aggregate, filler and asphalt cement in the buffer layer is 100: 5: 8, the mass ratio of the aggregate, the filler and the asphalt cement in the wearing layer is 100: 6: 7.6.
wherein, the bonding bottom layer and the adhesion layer both adopt epoxy resin bonding layer oil produced by Japanese modern chemical company, the model is KD-HYP, and the weight ratio is 1: 1, mixing a main agent and a curing agent; diabase is used as aggregate, limestone mineral powder is used as filler; the asphalt cement is high-viscosity high-elasticity modified asphalt produced by Huayuntong (Guangdong) road science and technology limited company, the softening point is more than or equal to 90 ℃, and the dynamic viscosity at 60 ℃ is more than or equal to 50 ten thousand Pa.s. The thickness of the buffer layer is 3cm, the maximum grain size of the aggregate and the filler in the buffer layer is 7mm, the oilstone ratio of the buffer layer is 7.2-8.0, and the porosity is 2% -3%; the thickness of the wearing layer is 3cm, the maximum grain size of aggregate and filler in the wearing layer is 9.5mm, the oilstone ratio of the wearing layer is not less than 7.0, and the porosity is 3% -4%.
The construction method of the steel bridge deck pavement structure comprises the following steps:
(1) before construction, the sundries on the working face are cleaned, and the working face range is closed, so that the working face is ensured to be free of interference.
(2) And (3) carrying out sand blasting and rust removal on the steel bridge deck steel plate, wherein the rust removal grade is required to be more than Sa2.5 grade, and the roughness is 80-140 mu m.
(3) Construction of a bonding bottom layer: the construction adhesive bottom layer can be coated only when the temperature is higher than 10 ℃ and the temperature of the steel bridge deck steel plate is higher than 10 ℃, and the drawing strength at 25 ℃ is ensured to be more than or equal to 5 MPa. During construction, the main agent and the curing agent in the epoxy resin adhesive layer oil are heated to 20-30 ℃, and then the main agent and the curing agent are mixed according to the weight ratio of 1: 1 stirring for 2-4 min by an electric stirrer, uniformly coating on a steel bridge deck steel plate by manual brushing or mechanical spraying, and controlling the using amount of epoxy resin adhesive layer oil to be 0.45kg/m2And forming a bonding bottom layer. The drawing strength of the bonding bottom layer and the steel plate is 5.8 MPa.
(4) Buffer layer construction: firstly, aggregate is heated to 205 ℃ and stirred for 45s, then high-viscosity high-elasticity modified asphalt heated to 180 ℃ is added into the aggregate and stirred for 45s to be uniform, finally, filler heated to 200 ℃ is added, the mixture is stirred for 60s to be uniform at 180 ℃, high-toughness modified asphalt concrete for buffer layer construction is obtained, a buffer layer with the thickness of 3cm is formed by whole-width paving and rolling, the discharging temperature is 170-210 ℃, the paving temperature is 165 ℃, the rolling temperature is 150 ℃, a 9-13-ton double-steel-wheel road roller is adopted for rolling, and a rubber-wheel road roller is forbidden. The grading of the buffer layer is shown in table 8 below:
TABLE 8 grading requirements for aggregates and fillers in buffer layers
| Screen hole (Square hole screen mm) | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Passage Rate (%) | - | 100 | 55 | 20 | 18 | 14 | 11 | 9 | 6 |
(5) Construction of an adhesive layer: the adhesion layer adopts epoxy resin to bond the layer oil, can guarantee that the interlaminar bonding pull strength is more than or equal to 1 MPa. When the adhesive layer is constructed, the ring is firstly heldHeating a main agent and a curing agent in epoxy resin adhesive layer oil to 20-30 ℃, and then mixing the main agent and the curing agent according to a weight ratio of 1: 1 stirring for 2-4 min by an electric stirrer, uniformly coating on the surface of the buffer layer by manual coating or mechanical spraying, and controlling the using amount of epoxy resin adhesive layer oil at 0.7kg/m2And forming an adhesion layer.
(6) Construction of a wearing layer: after the construction of the adhesion layer, firstly heating the aggregate to 210 ℃, stirring for 30s, then adding the high-viscosity high-elasticity modified asphalt heated to 185 ℃ into the aggregate, stirring for 45s to be uniform, finally adding the filler heated to 205 ℃, stirring for 60s to be uniform at 180 ℃ to obtain the high-toughness modified asphalt concrete for the wearing layer, paving and rolling the whole to form the wearing layer with the thickness of 3cm, wherein the discharging temperature is 170-210 ℃, the paving temperature is 165 ℃, the rolling temperature is 150 ℃, and the rolling is carried out by adopting a 9-13-ton double-steel-wheel road roller. The wear layer grading is shown in table 9 below:
TABLE 9 gradation requirements for aggregates and fillers in wearing course
| Screen hole (Square hole screen mm) | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Passage Rate (%) | 100 | 86 | 60 | 21 | 18 | 13 | 10 | 8 | 6 |
Example 4
The embodiment provides a steel bridge deck pavement structure of high toughness, durability, skid resistance, including steel bridge deck steel sheet, the surface of steel bridge deck steel sheet has laid bonding bottom layer, buffer layer, adhesion layer and wearing and tearing layer by from bottom to top in proper order, and buffer layer and wearing and tearing layer are the high toughness modified asphalt concrete who comprises aggregate, filler and asphalt cement, and the mass ratio of aggregate, filler and asphalt cement in the buffer layer is 100: 8: 7.5, the mass ratio of the aggregate, the filler and the asphalt cement in the wearing layer is 100: 10: 7.4.
wherein the bonding bottom layer adopts epoxy resin bonding oil produced by Japanese modern chemical company, the model is KD-HYP, and the weight ratio is 1: 1, mixing a main agent and a curing agent; the adhesive layer adopts high-viscosity high-elasticity modified emulsified asphalt of a commercial product; basalt is adopted as aggregate, and limestone mineral powder is adopted as filler; the asphalt cement is high-viscosity high-elasticity modified asphalt produced by Huayuntong (Guangdong) road science and technology limited company, the softening point is more than or equal to 90 ℃, and the dynamic viscosity at 60 ℃ is more than or equal to 50 ten thousand Pa.s. The thickness of the buffer layer is 1cm, the maximum grain size of aggregates and fillers in the buffer layer is 7mm, the oilstone ratio of the buffer layer is 7.2-8.0, and the porosity is 2% -3%; the thickness of the wearing layer is 2cm, the maximum grain size of aggregate and filler in the wearing layer is 9.5mm, the oilstone ratio of the wearing layer is not less than 7.0, and the porosity is 3% -4%.
The construction method of the steel bridge deck pavement structure comprises the following steps:
(1) before construction, the sundries on the working face are cleaned, and the working face range is closed, so that the working face is ensured to be free of interference.
(2) And (3) carrying out sand blasting and rust removal on the steel bridge deck steel plate, wherein the rust removal grade is required to be more than Sa2.5 grade, and the roughness is 80-140 mu m.
(3) Construction of a bonding bottom layer: the construction adhesive bottom layer can be coated only when the temperature is higher than 10 ℃ and the temperature of the steel bridge deck steel plate is higher than 10 ℃, and the drawing strength at 25 ℃ is ensured to be more than or equal to 5 MPa. During construction, the main agent and the curing agent in the epoxy resin adhesive layer oil are heated to 20-30 ℃, and then the main agent and the curing agent are mixed according to the weight ratio of 1: 1 stirring for 2-4 min by an electric stirrer, uniformly coating on a steel bridge deck steel plate by manual brushing or mechanical spraying, and controlling the using amount of epoxy resin adhesive layer oil to be 0.48kg/m2And forming a bonding bottom layer. The drawing strength of the bonding bottom layer and the steel plate is 5.8 MPa.
(4) Buffer layer construction: firstly, aggregate is heated to 190 ℃ and stirred for 30s, then high-viscosity high-elasticity modified asphalt heated to 180 ℃ is added into the aggregate and stirred for 60s to be uniform, finally, filler heated to 190 ℃ is added, the mixture is stirred for 45s to be uniform at 180 ℃, high-toughness modified asphalt concrete for buffer layer construction is obtained, a buffer layer with the thickness of 1cm is formed by whole-width paving and rolling, the discharging temperature is 170-210 ℃, the paving temperature is 165 ℃, the rolling temperature is 150 ℃, a 9-13-ton double-steel-wheel road roller is adopted for rolling, and a rubber-wheel road roller is forbidden. The grading of the buffer layer is shown in table 10 below:
TABLE 10 grading requirements for aggregates and fillers in buffer layers
| Screen hole (Square hole screen mm) | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Passage Rate (%) | - | 100 | 55 | 21 | 15 | 11 | 10 | 8 | 6 |
(5) Construction of an adhesive layer: the adhesive layer is made of high-viscosity high-elasticity modified emulsified asphalt, and when the adhesive layer is constructed, a synchronous construction process is adopted, and the spraying amount is 0.8kg/m through a Fowler S1800-3SJ synchronous paver with spraying2And the buffer layer and the wearing layer are synchronously paved to form an adhesion layer on the buffer layer, so that the pollution between layers during the separation construction is avoided, the adhesion performance between layers is ensured during the synchronous construction, and the construction time is also shortened.
(6) Construction of a wearing layer: after the construction of the adhesion layer, firstly heating the aggregate to 195 ℃, stirring for 30s, then adding the high-viscosity high-elasticity modified asphalt heated to 180 ℃ into the aggregate, stirring for 45s to be uniform, finally adding the filler heated to 190 ℃, stirring for 60s to be uniform at 180 ℃ to obtain the high-toughness modified asphalt concrete for the wearing layer, paving and rolling the whole to form the wearing layer with the thickness of 2cm, wherein the discharging temperature is 170-210 ℃, the paving temperature is 165 ℃, the rolling temperature is 150 ℃, and the rolling is carried out by adopting a 9-13-ton double-steel-wheel road roller. The wear layer grading is shown in table 11 below:
TABLE 11 grading requirements for aggregates and fillers in wearing course
| Screen hole (Square hole screen mm) | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Passage Rate (%) | 100 | 85 | 65 | 23 | 18 | 15 | 12 | 10 | 8 |
In order to verify the beneficial effects of the invention, the performance test of the composite beam prepared in the embodiment 1-4 is carried out.
Testing BPN swing value, construction depth, freeze-thaw splitting test residual strength ratio, water immersion Marshall test residual stability, combination beam dynamic stability and combination beam four-point bending fatigue test (800 microstrain, 15 ℃) according to road engineering asphalt and asphalt mixture test procedure JTG E20-2011; carrying out an interlayer drawing test according to JTG/T3364-02-2019, which is a pavement design and construction technical specification of a road steel bridge deck; the results of the experiment are shown in table 12 below:
TABLE 12 test conditions for the Performance of the composite Beam
From the above table 12, it can be seen that each performance index of the embodiments 1 to 4 satisfies the index requirement, showing better comprehensive performance of the invention. The test items of BPN swing value, a four-point bending fatigue test of the composite beam, an interlayer drawing test and dynamic stability of the composite beam are all highlighted in the embodiments 1-4 to have excellent performances, and the steel bridge deck pavement structure has good high-temperature anti-rutting performance, anti-fatigue durability, anti-skid performance, bonding strength and deformation following performance.
In addition, the price of the pavement structure of the steel bridge deck with the thickness of 5cm is 500 yuan/m2Compared with the pouring type asphalt concrete pavement (900 yuan/m) adopting special lake asphalt2) And epoxy asphalt concrete pavement (1500 yuan/m)2) Large, largeGreatly saves the construction cost, and is beneficial to the maintenance and the repair in the later period.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides a steel bridge deck pavement structure of high toughness, durable, skid resistance, includes steel bridge deck steel sheet, its characterized in that, bond bottom layer, buffer layer, adhesion layer and wearing and tearing layer have been laid in proper order by bottom to top on the surface of steel bridge deck steel sheet, the buffer layer with the wearing and tearing layer is the high toughness modified asphalt concrete who comprises aggregate, filler and asphalt cement, the thickness of buffer layer is 1 ~ 3cm, the thickness on wearing and tearing layer is 2 ~ 3 cm.
2. The steel deck pavement structure according to claim 1, wherein the mass ratio of the aggregate, the filler and the asphalt binder in the buffer layer is 100: 5-8: 7.5 to 8.5.
3. The steel deck pavement structure according to claim 1, wherein the mass ratio of the aggregate, the filler and the asphalt binder in the wearing layer is 100: 6-10: 7.4 to 8.4.
4. The steel deck pavement structure according to claim 1, wherein the aggregate and filler in the buffer layer have a maximum grain size of 7mm, and the aggregate and filler in the wearing layer have a maximum grain size of 9.5 mm.
5. The steel deck pavement structure according to claim 1, wherein the aggregate is basalt or diabase.
6. The steel deck pavement structure according to claim 1, wherein the filler is limestone mineral powder.
7. The steel bridge deck pavement structure according to claim 1, wherein the asphalt cement is high-viscosity high-elasticity modified asphalt, the softening point is greater than or equal to 90 ℃, and the dynamic viscosity at 60 ℃ is greater than or equal to 50 ten thousand Pa.s.
8. The steel bridge deck pavement structure according to claim 1, wherein the bonding bottom layer is epoxy resin bonding layer oil, and the amount of the epoxy resin bonding layer oil is 0.4-0.5 kg/m2。
9. The steel bridge deck pavement structure according to claim 1, wherein the adhesion layer is made of epoxy resin adhesive layer oil or high-viscosity high-elasticity modified emulsified asphalt, and when the adhesion layer is made of epoxy resin adhesive layer oil, the amount of the epoxy resin adhesive layer oil is 0.7-0.8 kg/m2When the adhesive layer is made of high-viscosity high-elasticity modified emulsified asphalt, the spraying amount of the high-viscosity high-elasticity modified emulsified asphalt is 0.8-1.0 kg/m2。
10. The construction method of the steel bridge deck pavement structure according to claims 1-9, characterized by comprising the following steps:
(1) cleaning sundries on an operation surface before construction;
(2) the steel bridge deck steel plate is subjected to sand blasting for rust removal, the rust removal grade is more than Sa2.5 grade, and the roughness is 80-140 mu m;
(3) construction of a bonding bottom layer: heating the epoxy resin adhesive layer oil to 20-30 ℃, stirring for 2-4 min, and uniformly coating the epoxy resin adhesive layer oil on a steel bridge deck steel plate, wherein the dosage is controlled to be 0.4-0.5 kg/m2Forming a bonding bottom layer;
(4) buffer layer construction: firstly, heating aggregate to 190-210 ℃, stirring for 30-45 s, then adding asphalt cement heated to 170-190 ℃ into the aggregate, stirring for 45-60 s until the mixture is uniform, finally adding filler heated to 190-210 ℃, stirring for 45-60 s at 180 ℃ until the mixture is uniform to obtain high-toughness modified asphalt concrete for a buffer layer, and forming the buffer layer with the thickness of 1-3 cm by whole spreading and rolling, wherein the discharging temperature is 170-210 ℃, the spreading temperature is not less than 165 ℃ and the rolling temperature is not less than 150 ℃;
(5) construction of an adhesive layer: when the adhesive layer adopts epoxy resin adhesive layer oil, the epoxy resin adhesive layer oil is heated to 20-30 ℃, stirred for 2-4 min and uniformly coated on the surface of the buffer layer, and the dosage is controlled to be 0.7-0.8 kg/m2Forming an adhesion layer; when the adhesive layer adopts high-viscosity high-elasticity modified emulsified asphalt, a synchronous paver with spraying is adopted to spray the high-viscosity high-elasticity modified emulsified asphalt according to the spraying amount of 0.8-1.0 kg/m2Synchronously paving the buffer layer and the wearing layer to form an adhesion layer on the buffer layer;
(6) construction of a wearing layer: firstly, heating aggregate to 180-210 ℃, stirring for 30-45 s, then adding asphalt cement heated to 180-200 ℃ into the aggregate, stirring for 45-60 s to be uniform, finally adding filler heated to 190-210 ℃, stirring for 45-60 s to be uniform at 180 ℃ to obtain high-toughness modified asphalt concrete for an abrasion layer, and forming the abrasion layer with the thickness of 2-3 cm by whole spreading and rolling, wherein the discharging temperature is 170-210 ℃, the spreading temperature is not less than 165 ℃, and the rolling temperature is not less than 150 ℃.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111705654A (en) * | 2020-07-03 | 2020-09-25 | 重庆市智翔铺道技术工程有限公司 | Steel bridge deck pavement structure transition layer |
| CN111733699A (en) * | 2020-08-06 | 2020-10-02 | 长沙理工大学 | Magnetic powder modified steel bridge deck asphalt pavement structure and construction method thereof |
| CN113882284A (en) * | 2021-11-05 | 2022-01-04 | 西安市灞桥市政设施养护管理有限公司 | High-toughness mute thin layer cover maintenance construction method for urban road and bridge |
| CN114382007A (en) * | 2021-12-24 | 2022-04-22 | 东南大学 | Durable bridge deck pavement structure suitable for concrete bridge and construction method thereof |
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2019
- 2019-12-30 CN CN201911390933.5A patent/CN110952447A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111705654A (en) * | 2020-07-03 | 2020-09-25 | 重庆市智翔铺道技术工程有限公司 | Steel bridge deck pavement structure transition layer |
| CN111733699A (en) * | 2020-08-06 | 2020-10-02 | 长沙理工大学 | Magnetic powder modified steel bridge deck asphalt pavement structure and construction method thereof |
| CN113882284A (en) * | 2021-11-05 | 2022-01-04 | 西安市灞桥市政设施养护管理有限公司 | High-toughness mute thin layer cover maintenance construction method for urban road and bridge |
| CN114382007A (en) * | 2021-12-24 | 2022-04-22 | 东南大学 | Durable bridge deck pavement structure suitable for concrete bridge and construction method thereof |
| CN114382007B (en) * | 2021-12-24 | 2024-05-17 | 东南大学 | Durable bridge deck pavement structure suitable for concrete bridge and construction method thereof |
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