CN210439139U - Cement concrete bridge floor double-layer AC asphalt mixture pavement structure - Google Patents

Cement concrete bridge floor double-layer AC asphalt mixture pavement structure Download PDF

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Publication number
CN210439139U
CN210439139U CN201920958920.2U CN201920958920U CN210439139U CN 210439139 U CN210439139 U CN 210439139U CN 201920958920 U CN201920958920 U CN 201920958920U CN 210439139 U CN210439139 U CN 210439139U
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layer
cement concrete
asphalt
concrete bridge
bonding layer
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Inventor
王凯
周勇
商红发
王霄川
鹿鸣
吕明柳
高震
刘洪新
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Shandong Luqiao Group Co Ltd
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Shandong Luqiao Group Co Ltd
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Abstract

The utility model provides a double-deck AC bituminous mixture of cement concrete bridge floor structure of mating formation, it is with low costs and longe-lived. The utility model provides a double-deck AC bituminous mixture of cement concrete bridge floor structure of mating formation, cement concrete bridge floor upper surface and waterproof bonding layer lower surface combine, waterproof bonding layer upper surface and intermediate level lower surface combine, intermediate level upper surface and bonding layer lower surface combine, bonding layer upper surface and upper strata lower surface combine, the intermediate level includes rubble french drain and lower surface course, the rubble french drain sets up in the curb side, lower surface course and upper surface course are the AC bituminous concrete layer with polyester fiber.

Description

Cement concrete bridge floor double-layer AC asphalt mixture pavement structure
Technical Field
The utility model relates to a bridge floor structure, concretely relates to double-deck AC asphalt concrete pavement structure of cement concrete bridge face belongs to road and bridge technical field.
Background
Unlike common road asphalt concrete pavement, the bridge pavement structure needs to have sufficient strength, reasonable thickness, excellent compatibility, excellent interlayer adhesion, high temperature stability, crack resistance, smoothness and other technical performances suitable for the structural characteristics and the use conditions of the road surface.
The materials for paving bridge deck at present mainly comprise three paving materials of cast asphalt mixture, modified SMA mixture and epoxy asphalt mixture. The cast asphalt mixture has high cost, needs professional equipment for construction, has high construction temperature and is easy to cause asphalt aging for a long time. The SMA mixture has the advantages of easy rolling, small void ratio, good thermal stability, water damage resistance, rough and uniform surface and the like. The double-layer SMA bridge deck pavement system can meet the use requirements of concrete bridge decks in structure and material. However, when the SMA mixture is rolled, the road roller is required to vibrate, and when the bridge structure is not allowed, especially for a highway and railway dual-purpose bridge, the vibration compaction is not allowed, the application of the SMA mixture is limited. The traditional AC mixture is inferior to SMA in high temperature, fatigue resistance and low temperature crack resistance.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a double-deck AC asphalt concrete of cement concrete bridge floor structure of mating formation, it is with low costs and longe-lived.
The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:
the utility model provides a double-deck AC asphalt concrete of cement concrete bridge floor structure of mating formation, cement concrete bridge floor upper surface and waterproof bonding layer lower surface combine, waterproof bonding layer upper surface and intermediate level lower surface combine, the intermediate level upper surface combines with the tie coat lower surface, the tie coat upper surface combines with the upper strata lower surface, the intermediate level includes rubble french drain and lower surface course, the rubble french drain sets up in the curb side, lower surface course and upper surface course are the AC asphalt concrete layer with polyester fiber.
According to the optimal scheme of the double-layer AC asphalt concrete pavement structure of the cement concrete bridge deck, the waterproof bonding layer is a hot-melt composite modified asphalt fiber reinforced bridge deck waterproof bonding layer, the cutting length of fibers in the waterproof bonding layer is 3-6 cm, and the using amount of the fibers cannot be lower than 120g/m2The specification of the crushed stone is 4.75-9.5 mm single-particle-size crushed stone.
The cement concrete bridge deck double-layer AC asphalt concrete pavement structure is an optimal scheme, and the bonding layer is made of modified emulsified asphalt or a multi-component epoxy asphalt composite material.
According to the preferable scheme of the cement concrete bridge deck double-layer AC asphalt concrete pavement structure, the size of the macadam blind ditch is 15cm in width and 5cm in thickness, and the backfilled macadam is 9.5-19 mm basalt macadam.
According to the optimal scheme of the double-layer AC asphalt concrete pavement structure of the cement concrete bridge deck, the thicknesses of an upper surface layer and a lower surface layer are respectively 4-6 cm.
The utility model has the advantages that:
(1) the lower surface layer and the upper surface layer are both an AC-13 asphalt mixture layer added with polyester fibers, and 0.2-0.3% of polyester fibers are added on the basis of the traditional AC mixture, so that the performances of the mixture in the aspects of high temperature, fatigue resistance and low temperature crack resistance are greatly improved, and the service life of the pavement is prolonged.
(2) The manufacturing cost is more economical than that of a casting asphalt mixture and a SMA mixture; the construction is simpler. The method has wide application prospect in the original cement concrete bridge deck reconstruction and maintenance engineering.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is the utility model discloses cement concrete bridge floor double-deck AC asphalt concrete pavement structure schematic diagram:
wherein, 1, cement concrete bridge deck; 2. a waterproof adhesive layer; 3. breaking the stone blind ditch; 4. a lower layer; 5. a bonding layer; 6. and (6) a top layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate directions
The positional or positional relationship is based on that shown in the drawings and is for convenience of description and simplicity of illustration only
Rather than indicating or implying that the device or element so referred to must have a particular orientation, be constructed and arranged in a particular orientation
Operation, and therefore should not be construed as limiting the invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As described in the background art, the existing bridge deck pavement materials include three pavement materials, namely a cast asphalt mixture, a modified SMA mixture and an epoxy asphalt mixture, and have the following problems: the cast asphalt mixture has high manufacturing cost, needs professional equipment for construction, has high construction temperature and is easy to cause asphalt aging for a long time; the SMA mixture has the advantages of easy rolling, small void ratio, good thermal stability, water damage resistance, rough and uniform surface and the like; the double-layer SMA bridge deck pavement system can meet the use requirements of a concrete bridge deck on the structure and materials, but when the SMA mixture is rolled, a road roller is required to vibrate, and when the bridge structure is not allowed, particularly for a highway and railway dual-purpose bridge, vibration compaction is not allowed, the application of the SMA mixture is limited. The traditional AC mixture is inferior to SMA in high temperature, fatigue resistance and low temperature crack resistance. In order to solve the problem, the utility model adopts the following technical scheme:
the utility model provides a double-deck AC asphalt concrete of cement concrete bridge floor structure of mating formation, 1 upper surface of cement concrete bridge floor combines with 2 lower surfaces of waterproof bonding layer, 2 upper surfaces of waterproof bonding layer combine with the intermediate level lower surface, the intermediate level upper surface combines with 5 lower surfaces of tie coat, 5 upper surfaces of tie coat combine with 6 lower surfaces of last surface course, the intermediate level includes rubble french drain 3 and lower surface course 4, rubble french drain 3 sets up in the curb side, lower surface course 4 and last surface course 6 are the AC asphalt concrete layer with polyester fiber.
In the embodiment, the waterproof bonding layer is a hot-melt composite modified asphalt fiber reinforced bridge deck waterproof bonding layer, the cutting length of fibers in the waterproof bonding layer is 3-6 cm, and the using amount of the fibers cannot be lower than 120g/m2The specification of the crushed stone is 4.75-9.5 mm single-particle-size crushed stone.
In this example, the adhesive layer was made of modified emulsified asphalt of 0.5kg/m2A base layer treating agent of 1.8 to 2.6kg/m2The composite modified asphalt comprises 120g/m2 reinforced fiber and 4.75-9.5 mm single-particle-size crushed stone, and the dosage of the crushed stone is 5-7 kg/m2The covering rate is 60-80%, and the bonding layer can also be made of a multi-component epoxy asphalt composite material.
In the embodiment, the size of the crushed stone blind ditch 3 is 15cm in width and 5cm in thickness, and the backfilled crushed stones are 9.5-19 mm basalt crushed stones.
In the embodiment, the thicknesses of the upper layer 6 and the lower layer 4 are respectively 4-6 cm, the upper layer and the lower layer are both AC-13 asphalt mixture layers added with polyester fibers, the using amount of the polyester fibers is 0.3% of the mass of the AC-13 asphalt mixture, the polyester fibers are added while the coarse aggregates are added, the total mixing time is not less than 55s, the dry mixing time is not less than 10s, and the wet mixing time is not less than 45 s.
The paving method of the double-layer AC asphalt mixture paving structure of the cement concrete bridge deck comprises the following steps:
s1, performing shot blasting treatment or finish milling and planing on the cement concrete bridge deck, and ensuring that the structural depth is more than or equal to 0.3mm after treatment;
s2, constructing a waterproof bonding layer 2 on the cement concrete bridge deck, wherein the waterproof bonding layer 2 is a hot-melt composite modified asphalt fiber reinforced bridge deck waterproof bonding layer, the cutting length of fibers used for the waterproof bonding layer 2 is 3-6 cm, and the using amount of the fibers cannot be lower than 120g/m2
S3, coating SBS modified emulsified asphalt on the side face of the curb, arranging a macadam blind ditch, wherein the size of the macadam blind ditch 3 is 15cm wide and 5cm thick, and the backfilling macadam is basalt macadam with 9.5-19 mm of gravel;
s4, constructing a lower surface layer on the waterproof bonding layer 2, wherein the lower surface layer is formed by paving an AC-13 asphalt mixture and polyester fibers, the using amount of the polyester fibers is 0.3% of the mass of the AC-13 asphalt mixture, and the lower surface layer is rolled and combined into a mode that 2 vibratory rollers are adopted for static pressure for 2 times at the initial pressure, and the speed is 2 km/h; re-pressing by 3 rubber-tyred rollers for 3 times at a speed of 4 km/h; the final pressure is static pressure of 1 double-steel-wheel road roller until no wheel track exists, and the speed is 5 km/h;
s5, after the lower surface layer reaches the maintenance time, the construction of the bonding layer is specifically carried out by adopting SBS modified emulsified asphalt with the spreading amount of 0.3-0.5 kg/m2
And S6, after the emulsified asphalt is completely demulsified, constructing the AC-13 mixture on the upper layer, wherein the rolling mode is the same as that of the lower layer.
The paving method of the invention avoids the influence of vibration rolling on the safety of the bridge structure in a rolling combination mode of the lower layer and the upper layer, is particularly suitable for the road bridge of the iron-involved section, and avoids the interference of falling objects on the railway passage to the maximum extent during construction.
The deck performance in this example was compared to a conventional asphalt concrete deck:
(1) comparison of laboratory test results
From the above table it follows that: the residual stability of the AC-13 mixture after the polyester fiber is added is greater than that of the SMA-13 mixture, which shows that the water damage resistance of the AC-13 mixture is superior to that of the SMA-13 mixture; the high and low temperature performance is slightly superior to that of AC-13 by SMA-13; but the oil-stone ratio of the AC-13 mixture is 1.1 percent lower than that of the SMA-13 mixture, 9.9kg of asphalt can be used less for each ton of mixture, and the economic benefit is better.
(2) Comparison of test results
From the above table it follows that: the flatness and the compactness of the AC-13 mixture added with the polyester fiber are superior to those of the SMA-13 mixture; both are almost impermeable in water.
And (4) conclusion: (1) according to the test and detection results of related indoor and field test sections, the AC-13 mixture added with the polyester fiber is superior to SMA-13 in the aspects of water damage resistance, flatness and compactness control; the high and low temperature performance is inferior to that of the SMA-13 mixture, but the high and low temperature performance completely meets the requirements of design and first-order-to-first-order specifications.
(2) Compared with the SMA-13 mixture, the AC-13 mixed mineral aggregate is simpler and more convenient to raw materials, mixing temperature, mixing time and construction process, is more beneficial to construction quality control, and has better economic benefit.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. The utility model provides a double-deck AC bituminous mixture of cement concrete bridge floor structure of mating formation which characterized in that: cement concrete bridge floor (1) upper surface combines with waterproof bonding layer (2) lower surface, waterproof bonding layer (2) upper surface combines with the intermediate level lower surface, the intermediate level upper surface combines with tie coat (5) lower surface, tie coat (5) upper surface combines with upper surface layer (6) lower surface, the intermediate level includes rubble french drain (3) and lower surface course (4), rubble french drain (3) set up in the curb side, lower surface course (4) and upper surface course (6) are the AC asphalt concrete layer who adds polyester fiber.
2. The cement concrete bridge deck double-layer AC asphalt mixture pavement structure according to claim 1, which is characterized in that: the waterproof bonding layer is a hot-melt composite modified asphalt fiber reinforced bridge deck waterproof bonding layer, the cutting length of fibers in the waterproof bonding layer is 3-6 cm, and the using amount of the fibers cannot be lower than 120g/m2The specification of the crushed stone is 4.75-9.5 mm single-particle-size crushed stone.
3. The cement concrete bridge deck double-layer AC asphalt mixture pavement structure according to claim 1, which is characterized in that: the bonding layer is made of modified emulsified asphalt or multi-component epoxy asphalt composite material.
4. The cement concrete bridge deck double-layer AC asphalt mixture pavement structure according to any one of claims 1, 2 or 3, characterized in that: the size of the crushed stone blind ditch (3) is 15cm in width and 5cm in thickness, and the backfilled crushed stones are 9.5-19 mm basalt crushed stones.
5. The cement concrete bridge deck double-layer AC asphalt mixture pavement structure according to any one of claims 1, 2 or 3, characterized in that: the thicknesses of the upper surface layer (6) and the lower surface layer (4) are respectively 4-6 cm.
CN201920958920.2U 2019-06-25 2019-06-25 Cement concrete bridge floor double-layer AC asphalt mixture pavement structure Active CN210439139U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920958920.2U CN210439139U (en) 2019-06-25 2019-06-25 Cement concrete bridge floor double-layer AC asphalt mixture pavement structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920958920.2U CN210439139U (en) 2019-06-25 2019-06-25 Cement concrete bridge floor double-layer AC asphalt mixture pavement structure

Publications (1)

Publication Number Publication Date
CN210439139U true CN210439139U (en) 2020-05-01

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Application Number Title Priority Date Filing Date
CN201920958920.2U Active CN210439139U (en) 2019-06-25 2019-06-25 Cement concrete bridge floor double-layer AC asphalt mixture pavement structure

Country Status (1)

Country Link
CN (1) CN210439139U (en)

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