WO2021077817A1 - 一种预制超高性能混凝土钢桥面铺装结构及制备方法 - Google Patents
一种预制超高性能混凝土钢桥面铺装结构及制备方法 Download PDFInfo
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- WO2021077817A1 WO2021077817A1 PCT/CN2020/102447 CN2020102447W WO2021077817A1 WO 2021077817 A1 WO2021077817 A1 WO 2021077817A1 CN 2020102447 W CN2020102447 W CN 2020102447W WO 2021077817 A1 WO2021077817 A1 WO 2021077817A1
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- 239000010410 layer Substances 0.000 claims abstract description 95
- 229920005989 resin Polymers 0.000 claims abstract description 66
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- 239000004575 stone Substances 0.000 claims description 20
- 229930185605 Bisphenol Natural products 0.000 claims description 18
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 16
- YSUQLAYJZDEMOT-UHFFFAOYSA-N 2-(butoxymethyl)oxirane Chemical compound CCCCOCC1CO1 YSUQLAYJZDEMOT-UHFFFAOYSA-N 0.000 claims description 15
- 229920002748 Basalt fiber Polymers 0.000 claims description 15
- 239000002131 composite material Substances 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 11
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims description 10
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- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 8
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- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
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Images
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
Definitions
- the invention relates to the technical field of steel bridge deck paving, in particular to a prefabricated ultra-high performance concrete steel bridge deck paving structure and a preparation method.
- Ultra-high performance concrete has good fatigue durability and resistance to deformation under load. It can improve the rigidity of the steel bridge deck and play a certain reinforcing effect; when it is used as a steel bridge deck paving material, it is often passed on the steel bridge deck. Welding shear rivets to achieve an effective connection with the steel bridge deck. However, when welding rivets, it will cause a certain degree of damage to the steel bridge deck and cause greater safety hazards, and the setting of the studs will also cause later maintenance and repairs. Great influence.
- the construction of high-performance concrete steel bridge deck pavement structure generally adopts on-site pouring construction. The quality of the paving layer and its surface flatness are difficult to control, and the on-site maintenance time will also extend the construction period and affect the traffic operation.
- the use of high-performance concrete precast slab paving structure can further shorten the maintenance period and reduce the waste of human resources.
- the oxygen protective wear layer is laid to ensure the smoothness of the pavement while also satisfying driving comfort.
- the inventors actively research and innovate based on years of rich practical experience and professional knowledge engaged in the engineering application of such products, and cooperate with the application of academic theory, in order to create a prefabricated ultra-high performance concrete steel bridge deck pavement structure and preparation method, so that It is more practical.
- the purpose of the present invention is to provide a prefabricated ultra-high performance concrete steel bridge deck pavement structure and preparation method to reduce fatigue cracking of steel bridge deck paving, overcome rivet welding damage in the prior art, and ultra-high performance concrete construction steel bridge deck
- the flatness is difficult to control, and the long construction period affects traffic operation.
- the use of high-toughness resin contact surface full bonding method can reinforce the steel bridge deck and avoid the stress damage caused by conventional welding and rivet connection to the steel plate, and the pavement structure
- the improved mechanical properties of the pavement layer also provide convenience for the later maintenance and repair of the pavement layer.
- a prefabricated ultra-high performance concrete steel bridge deck pavement structure with a total pavement thickness of 5-8cm, which includes a steel panel base layer, a high-toughness resin waterproof bonding layer, a high-density fiber concrete prefabricated pavement layer and epoxy chips from bottom to top. Stone anti-skid wear layer.
- the thickness of the high-toughness resin waterproof bonding layer is 5-10mm, including the uneven connection surface formed by the high-toughness resin and the basalt gravel with a particle size of 1-5mm, the high-strength interface adhesive injected into the reserved holes of the prefabricated plate, and the High-viscosity pads for positioning of prefabricated panels.
- the high toughness resin includes the following components: 65 to 70 parts of bisphenol epoxy resin, 10 to 15 parts of butyl glycidyl ether reactive diluent, 12 to 16 parts of polyamide curing agent, butyl 2 to 5 parts of nitrile rubber toughening agent and 2 to 5 parts of quartz powder reinforcing agent.
- the high-strength interface adhesive includes the following components: 65 to 70 parts of epoxy resin, 12 to 16 parts of polyamide curing agent, 5 to 10 parts of polyisocyanate adhesive, and butyl glycidol It is composed of 4-6 parts of ether active diluent and 2-5 parts of quartz water-based powder enhancer.
- the gasket strip is a butyl rubber self-adhesive gasket strip with a length of 0.5 to 1.0 m, a width of 10 to 20 cm, a thickness of 1.0 to 2.0 cm, and a horizontal and vertical center spacing of 1.5 to 2.0 m.
- the thickness of the high-density fiber concrete prefabricated paving layer is 4-6cm, which is composed of high-density fiber concrete prefabricated slabs spliced together, and the upper and lower edges of the opposite side locks and the lock grooves are equipped with polyurethane high-elastic sealing strips, with a width of 1 to 2cm.
- the thickness is 0.5 ⁇ 1.0cm; the length of the prefabricated board is 1 ⁇ 5m, and the width is 3 ⁇ 4m.
- the opposite sides of the high-density fiber concrete precast slab are respectively provided with semi-circular arc-shaped locks and lock grooves, and the diameter of the arc is 2 to 3 cm.
- the high-density fiber concrete prefabricated slab reserves a grouting hole and a diffusion port at the bottom of the hole, the aperture size is 10-16mm, and the diameter of the diffusion port at the bottom of the hole is 30-50mm.
- the high-density fiber-reinforced concrete precast slab is composed of steel mesh and fiber concrete, wherein the diameter of the steel mesh is 8-10mm, and the mesh spacing is 50-150mm.
- high-density fiber concrete includes the following components: 25-30 parts of Portland cement, 6-10 parts of silica fume, 8-12 parts of quartz powder, 30-35 parts of quartz sand with a particle size of ⁇ 1mm Parts, 2 to 4 parts of composite chopped steel fiber, 4 to 8 parts of basalt fiber, 8 to 12 parts of water, and 1 to 2 parts of polycarboxylic acid superplasticizer.
- the anti-skid wear layer of epoxy crushed stone has a thickness of 3 to 5 mm, and is formed by double-layer resin epoxy consolidating fine crushed stone particles of 1 to 3 mm.
- the double-layer resin epoxy includes the lower reinforced epoxy and the upper protective epoxy composite bond; calculated in parts by mass, the lower reinforced epoxy includes the following components: 68-72 parts of polyurethane epoxy resin, double 12-15 parts of glycidyl ether diluent, 12-16 parts of acid anhydride curing agent and 3-7 parts of polyether resin active toughening agent; protective epoxy includes 58-62 parts of bisphenol epoxy resin and polyamide curing agent 15-20 parts, 3-8 parts of olefin or cycloaliphatic monoepoxy diluent, 2-6 parts of benzoate toughening agent, 2-6 parts of organic silicon moisture-resistant aging agent.
- the method for preparing a prefabricated ultra-high performance concrete steel bridge deck pavement structure of the present invention includes the following steps:
- the bottom surface of the mold is the top surface of the prefabricated slab after molding.
- the high-density fiber concrete prefabricated slab is poured upside down.
- the side of the mold is provided with a semicircular concave and convex surface with a diameter of 20-30mm on the opposite side of the mold.
- the area is diagonally reserved for grouting holes with a diameter of 10-16mm and a semi-spherical diffuser with a diameter of 30-50mm at the bottom;
- the present invention has the following beneficial effects:
- the high-density fiber concrete prefabricated slab structure is used for on-site splicing to form a pavement layer.
- the prefabricated paving slabs can be standardized and mass-produced in the factory, and the climatic conditions are less restricted, and the paving quality is more reliable; at the same time, it reduces the need for on-site manpower and reduces The labor intensity of personnel; and the prefabricated structure does not need to be pavement and maintenance on site, reducing some procedures, speeding up the construction progress, and greatly shortening the traffic closure time caused by construction.
- the method of fully bonded and reinforced steel bridge deck is adopted to improve the overall rigidity of the steel deck system and delay the fatigue damage of the orthotropic steel deck and pavement;
- the multi-angle and three-dimensional distribution of concrete can effectively reduce the stress concentration of the cracks, improve the toughness and prevent the occurrence of cracks;
- the paving layer is equipped with steel mesh at the same time, dispersing the effect of the driving load, dissipating the tensile stress in the paving layer, and improving the overall bending and tensile resistance of the paving And anti-cracking performance.
- the steel panel and the concrete pavement layer are cured by high-toughness resin to bond the gravel to form a rough surface. At the same time, it is combined with a high-elastic interface adhesive. With the dual effects of physical occlusion and chemical adhesive, the pavement structure is effectively interlayered. Connection; It also provides convenience for the later maintenance and repair of the pavement layer, while avoiding the stress damage to the steel plate caused by the conventional welding rivet connection.
- the concrete paving surface is laid with epoxy resin anti-slip wear layer, and the thickness is further reduced to 3 ⁇ 5mm, which relatively reduces the dead load of the steel bridge deck.
- the reinforced resin can enhance the effective bonding between the wear layer and the pavement layer.
- the protective resin layer has better temperature adaptability, can prevent the direct influence of rain and sunlight, and provide better driving safety and comfort.
- Fig. 1 is a schematic diagram of a cross-section of an ultra-high performance concrete steel bridge deck pavement in an embodiment of the present invention.
- Figure 2 is a schematic plan view of the ultra-high performance concrete paving precast slab in the embodiment of the present invention.
- the ultra-high performance concrete steel bridge deck pavement is composed of a steel panel base layer 1, a high-toughness resin waterproof bonding layer 2, a high-density fiber concrete paving layer 3, and an epoxy crushed stone anti-skid wear layer 4 Composed sequentially from bottom to top;
- the high-toughness resin waterproof adhesive layer 2 includes a high-viscosity pad 5;
- the high-density fiber concrete paving layer 3 includes a sparse reinforcement mesh 6, a lock groove 7, a reserved grouting hole and a bottom diffuser 8, and a sealing strip 9 at the joint.
- the base layer 1 of the steel panel is obtained by shot blasting sandblasting and rust removal treatment on the upper surface of the steel bridge. Its function is to improve the cleanliness of the steel bridge surface, reduce the adhesion failure caused by the presence of contaminants, and increase The roughness of the metal surface improves the bond strength with the metal surface.
- the high-toughness resin waterproof bonding layer 2 includes the uneven connecting surface formed by the high-toughness resin and the basalt gravel with a particle size of 1 to 5 mm, the high-strength interface adhesive injected into the preformed holes of the prefabricated plate, and the High-viscosity pad rubber strip 5 for positioning on the prefabricated board.
- the high-toughness epoxy resin adhesive laid on the base layer of the steel panel 1 has waterproof performance, which can prevent the road surface water from contacting the steel bridge deck, reducing the probability of corrosion of the base layer of the steel panel.
- the crushed stone particles are partially exposed to form a rough surface after curing, which effectively enhances the physical occlusal connection between the layers, and at the same time combines the injection of high-strength interface adhesives to further increase the effective bonding performance of the structural layer interface.
- the use of this high-toughness resin waterproof adhesive layer 2 avoids the damage to the steel bridge deck caused by the use of rivets in the prior art and the impact on subsequent maintenance.
- the high toughness resin contains 65 to 70 parts of bisphenol epoxy resin, 12 to 16 parts of polyamide curing agent, 10 to 15 parts of butyl glycidyl ether reactive diluent, 2 to 5 parts of nitrile rubber toughening agent, and Quartz powder enhancer 2 to 5 parts.
- the fine crushed stone is formed by mechanical crushing of basalt, diabase or andesite, and the diameter of the crushed stone is 1 to 5 mm.
- the high-strength interface adhesive consists of 65 to 70 parts of epoxy resin, 12 to 16 parts of polyamide curing agent, 5 to 10 parts of polyisocyanate adhesive, 4 to 6 parts of butyl glycidyl ether reactive diluent and quartz It is composed of 2 to 5 parts of water-based powder enhancer.
- the gasket strip is a butyl rubber self-adhesive gasket strip with a length of 0.5 to 1.0 m, a width of 10 to 20 cm, a thickness of 1.0 to 2.0 cm, and a horizontal and vertical center spacing of 1.5 to 2.0 m.
- the high-density fiber concrete paving layer 3 has a thickness of 4-6cm and is composed of high-density fiber concrete precast panels spliced together.
- the opposite side locks and the upper and lower edges of the lock groove are equipped with polyurethane high-elastic sealing strips. 1 ⁇ 2cm, thickness 0.5 ⁇ 1.0cm.
- the high-density fiber-reinforced concrete precast slab is composed of steel mesh and fiber concrete, wherein the diameter of the steel mesh is 8-10mm, and the mesh spacing is 50-150mm.
- the length of the prefabricated slab is 1-5m and the width is 3-4m; the opposite sides of the high-density fiber concrete prefabricated slab are respectively provided with semi-circular arc locks and lock grooves 7, and the diameter of the arc is 2-3cm.
- a grouting hole and a diffusion port 8 at the bottom of the hole are reserved in the high-density fiber concrete prefabricated slab, the aperture size is 10-16mm, and the diameter of the diffusion port at the bottom of the hole is 30-50mm.
- the high-density fiber concrete is composed of 25-30 parts of Portland cement, 6-10 parts of silica fume, 8-12 parts of quartz powder, 30-35 parts of quartz sand with a particle size of ⁇ 1mm, and 2 ⁇ It is composed of 4 parts, 4-8 parts of basalt fiber, 8-12 parts of water, and 1-2 parts of polycarboxylic acid superplasticizer.
- the epoxy crushed stone anti-skid wear layer 4 has a thickness of 3 to 5 mm, and is formed by double-layer resin epoxy consolidating fine crushed stone particles of 1 to 3 mm.
- the fine crushed stone is formed by mechanical crushing of basalt, diabase or andesite, and the diameter of the crushed stone is 1 to 3 mm.
- the double-layer resin epoxy includes a lower reinforced epoxy and an upper protective epoxy composite bond; wherein the reinforced epoxy includes 68 to 72 parts of polyurethane epoxy, 12 to 15 parts of diglycidyl ether diluent, 12-16 parts of acid anhydride curing agent, 3-7 parts of polyether resin active toughening agent; protective epoxy includes 58-62 parts of bisphenol epoxy resin, 15-20 parts of polyamide curing agent, olefin or alicyclic 3 to 8 parts of monoepoxy diluent, 2 to 6 parts of benzoate toughening agent, and 2 to 6 parts of organic silicon damp and heat resistant aging agent.
- the reinforced epoxy includes 68 to 72 parts of polyurethane epoxy, 12 to 15 parts of diglycidyl ether diluent, 12-16 parts of acid anhydride curing agent, 3-7 parts of polyether resin active toughening agent
- protective epoxy includes 58-62 parts of bisphenol epoxy resin, 15-20 parts of polyamide curing agent, olefin or alicyclic 3
- the epoxy crushed stone anti-skid wear layer 4 is bonded to the bottom high-density fiber concrete pavement through reinforced resin epoxy, and at the same time, the protective resin solidifies the fine crushed stone particles to form a wear layer, which can prevent rain. As well as the direct impact of sunlight, and provide better driving safety and comfort.
- the bottom surface of the mold is the top surface of the prefabricated slab after molding.
- the high-density fiber concrete prefabricated slab is poured upside down.
- the side of the mold is provided with a semicircular concave and convex surface with a diameter of 20-30mm on the opposite side of the mold.
- the area is diagonally reserved for grouting holes with a diameter of 10-16mm and a semi-spherical diffuser with a diameter of 30-50mm at the bottom;
- the total thickness of the resin-bonded high-density fiber concrete precast steel bridge deck paving structure is 5-8cm, and the thickness of the high-toughness resin waterproof bonding layer is 5-10mm; the thickness of the high-density fiber concrete paving layer is 4 ⁇ 6cm; The thickness of the epoxy anti-skid wear layer is 3 ⁇ 5mm.
- a prefabricated ultra-high performance concrete steel bridge deck paving structure and a preparation method thereof include the following steps:
- the bottom surface of the mold is the top surface of the prefabricated slab after molding.
- the high-density fiber concrete prefabricated slab is poured upside down.
- the side of the mold is provided with a semicircular concave and convex surface with a diameter of 20mm.
- a grouting hole with a diameter of 16mm and a semi-spherical diffuser with a diameter of 50mm at the bottom are reserved at the diagonal position;
- Performance unit High-density fiber concrete Ordinary concrete Shrinkage value ⁇ 1350 250 7d compressive strength MPa 124.3 68.0 7d flexural strength MPa 25.8 8.5 Elastic Modulus GPa 48.9 25 Elastic ultimate strength MPa 10.3 6.8 Linear elastic ultimate strain % 0.025 0.002
- Test items unit Test Results Tensile strength (23°C) MPa 3.2 Elongation at break (23°C) % 26 Curing time (23°C) h 8 Bonding strength with concrete (23°C) MPa 8.9
- a prefabricated ultra-high performance concrete steel bridge deck paving structure and a preparation method thereof include the following steps:
- the bottom surface of the mold is the top surface of the prefabricated slab after molding.
- the high-density fiber concrete prefabricated slab is poured upside down.
- the side of the mold is equipped with a semicircular concave and convex surface with a diameter of 25mm.
- a grouting hole with a diameter of 14mm and a semi-spherical diffuser with a diameter of 40mm at the bottom are reserved at the diagonal position;
- Performance unit High-density fiber concrete Ordinary concrete Shrinkage value ⁇ 1350 250 7d compressive strength MPa 124.3 68.0 7d flexural strength MPa 25.8 8.5 Elastic Modulus GPa 48.9 25 Elastic ultimate strength MPa 10.3 6.8 Linear elastic ultimate strain % 0.025 0.002
- Test items unit Test Results Tensile strength (23°C) MPa 4.2 Elongation at break (23°C) % 25 Curing time (23°C) h 5 Bonding strength with concrete (23°C) MPa 9.4
- Sandblasting and roughening the surface of the high-density fiber concrete prefabricated paving layer according to 70 parts of polyurethane epoxy resin, 13 parts of diglycidyl ether diluent, 14 parts of acid anhydride curing agent, and 3 parts of polyether resin active toughening agent Prepare reinforced epoxy with a coating amount of 0.65kg/m 2 ; then add 60 parts of bisphenol epoxy resin, 18 parts of polyamide curing agent, 5 parts of olefin or cycloaliphatic monoepoxy diluent, and increase of benzoate 3 parts of toughening agent, a silicone heat aging protection agent, 3 parts of epoxy prepared, the coating amount of 0.65kg / m 2; the coating immediately after the completion of 1 ⁇ 3mm uniform fine gravel particles diabase, normal temperature regimen 1d Complete the pavement of ultra-high performance concrete steel bridge deck.
- a prefabricated ultra-high performance concrete steel bridge deck paving structure and a preparation method thereof include the following steps:
- the bottom surface of the mold is the top surface of the prefabricated slab after molding.
- the high-density fiber concrete prefabricated slab is poured upside down.
- the side of the mold is provided with a semicircular concave and convex surface with a diameter of 30mm.
- a grouting hole with a diameter of 16mm and a semi-spherical diffuser with a diameter of 50mm at the bottom are reserved at the diagonal position;
- Performance unit High-density fiber concrete Ordinary concrete Shrinkage value ⁇ 1420 250 7d compressive strength MPa 128.9 68.0 7d flexural strength MPa 25.2 8.5 Elastic Modulus GPa 42.5 25 Elastic ultimate strength MPa 13.8 6.8 Linear elastic ultimate strain % 0.033 0.002
- Test items unit Test Results Tensile strength (23°C) MPa 4.8 Elongation at break (23°C) % 28 Curing time (23°C) h 6.5 Bonding strength with concrete (23°C) MPa 9.3
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Abstract
Description
性能指标 | 单位 | 高密纤维混凝土 | 普通混凝土 |
收缩值 | με | 1350 | 250 |
7d抗压强度 | MPa | 124.3 | 68.0 |
7d抗折强度 | MPa | 25.8 | 8.5 |
弹性模量 | GPa | 48.9 | 25 |
弹性极限强度 | MPa | 10.3 | 6.8 |
线弹性极限应变 | % | 0.025 | 0.002 |
检测项目 | 单位 | 测试结果 |
抗拉强度(23℃) | MPa | 3.2 |
断裂延伸率(23℃) | % | 26 |
固化时间(23℃) | h | 8 |
与混凝土粘结强度(23℃) | MPa | 8.9 |
性能指标 | 单位 | 高密纤维混凝土 | 普通混凝土 |
收缩值 | με | 1350 | 250 |
7d抗压强度 | MPa | 124.3 | 68.0 |
7d抗折强度 | MPa | 25.8 | 8.5 |
弹性模量 | GPa | 48.9 | 25 |
弹性极限强度 | MPa | 10.3 | 6.8 |
线弹性极限应变 | % | 0.025 | 0.002 |
检测项目 | 单位 | 测试结果 |
抗拉强度(23℃) | MPa | 4.2 |
断裂延伸率(23℃) | % | 25 |
固化时间(23℃) | h | 5 |
与混凝土粘结强度(23℃) | MPa | 9.4 |
性能指标 | 单位 | 高密纤维混凝土 | 普通混凝土 |
收缩值 | με | 1420 | 250 |
7d抗压强度 | MPa | 128.9 | 68.0 |
7d抗折强度 | MPa | 25.2 | 8.5 |
弹性模量 | GPa | 42.5 | 25 |
弹性极限强度 | MPa | 13.8 | 6.8 |
线弹性极限应变 | % | 0.033 | 0.002 |
检测项目 | 单位 | 测试结果 |
抗拉强度(23℃) | MPa | 4.8 |
断裂延伸率(23℃) | % | 28 |
固化时间(23℃) | h | 6.5 |
与混凝土粘结强度(23℃) | MPa | 9.3 |
Claims (10)
- 一种预制超高性能混凝土钢桥面铺装结构,其特征在于,铺装总厚度5~8cm,由钢面板基层(1)、高韧树脂防水粘结层(2)、高密纤维混凝土预制铺装层(3)、环氧碎石抗滑磨耗层(4)由下至上依次组成。
- 根据权利要求1所述的预制超高性能混凝土钢桥面铺装结构,其特征在于,所述高韧树脂防水粘结层(2)包括高韧树脂、凹凸连接面、高强界面粘结剂和高粘垫胶(5);所述凹凸连接面由高韧树脂与1~5mm粒径玄武岩碎石组成;所述高强界面粘结剂由预制板预留孔中注入;所述高粘垫胶(5)用于对预制板进行定位。
- 根据权利要求2所述的预制超高性能混凝土钢桥面铺装结构,其特征在于,按照质量份数计算,所述高韧树脂包括如下组分:双酚环氧树脂65~70份、丁基缩水甘油醚活性稀释剂10~15份、聚酰胺固化剂12~16份、丁腈橡胶增韧剂2~5份和石英粉增强剂2~5份。
- 根据权利要求2所述的预制超高性能混凝土钢桥面铺装结构,其特征在于,按照质量份数计算,所述高强界面粘结剂包括如下组分:环氧树脂65~70份、聚酰胺固化剂12~16份、聚异氰酸酯粘合剂5~10份、丁基缩水甘油醚活性稀释剂4~6份和石英水性粉末增强剂2~5份。
- 根据权利要求1所述的预制超高性能混凝土钢桥面铺装结构,其特征在于,所述高密纤维混凝土预制铺装层(3)由高密纤维混凝土预制板拼接组合而成;所述高密纤维混凝土预制板对边分别设置半圆弧状锁扣锁槽(7),所述锁扣锁槽(7)上下沿均设置聚氨酯高弹性密封胶条,所述高密纤维混凝土预制板中预留注浆孔以及孔底扩散口(8)。
- 根据权利要求5所述的预制超高性能混凝土钢桥面铺装结构,其特征在于,所述高密纤维混凝土预制板包括疏配钢筋网(6)和高密纤维混凝土组成, 按照质量份数计算,所述高密纤维混凝土包括如下组分:硅酸盐水泥25~30份、硅灰6~10份、石英粉料8~12份、粒径≤1mm石英砂30~35份、水8~12份、聚羧酸高效减水剂1~2份、复合型短切钢纤维2~4份和玄武岩纤维4~8份。
- 根据权利要求1所述的预制超高性能混凝土钢桥面铺装结构,其特征在于,所述环氧碎石抗滑磨耗层(4)由双层树脂环氧固结1~3mm细碎石颗粒组成;所述双层环氧树脂包括下层加固型环氧树脂和上层防护型环氧树脂复合粘结。
- 根据权利要求7所述的预制超高性能混凝土钢桥面铺装结构,其特征在于,按照质量份数计算,所述下层加固型环氧树脂包括如下组分:聚氨酯环氧树脂68~72份、双缩水甘油醚稀释剂12~15份、酸酐类固化剂12~16份、聚醚树脂活性增韧剂3~7份。
- 根据权利要求7所述的预制超高性能混凝土钢桥面铺装结构,其特征在于,按照质量份数计算,所述下层防护型环氧树脂包括如下组分:双酚环氧树脂58~62份,聚酰胺固化剂15~20份、烯烃或脂环族单环氧树脂稀释剂3~8份、苯甲酸酯类增韧剂2~6份和有机硅耐湿热老化剂2~6份。
- 一种预制超高性能混凝土钢桥面铺装结构的制备方法,其特征在于,按照质量份数计算,包括以下步骤:S1.采用直径8~10mm螺纹带肋钢筋制作疏配钢筋网(6),设置横纵向钢筋间距为50~100mm,置于固定模具中成型高密纤维混凝土预制板,以焊接梯形钢筋方式控制钢筋网保护层厚度15~20mm;S2.称取硅酸盐水泥25~30份、硅灰6~10份、石英粉料8~12份、粒径≤1mm石英砂30~35份、复合型短切钢纤维2~4份和玄武岩纤维4~8份、水8~12份、聚羧酸高效减水剂1~2份,采用卧式搅拌机按25~35转/min速率将干混料搅拌 1min,依次加入玄武岩纤维和钢纤维,然后添加减水剂和拌和用水,湿拌5~8min制备高密纤维新拌混凝土;S3.模具底面为成型后预制板顶面,倒置浇筑高密纤维混凝土预制板,模具侧面对边设置直径20~30mm半圆状凹凸面,为成型预制板拼接的锁扣锁槽(7),浇筑前按照板面积在对角位置预留直径10~16mm注浆孔和底部直径30~50mm半圆球状扩散口;S4.待高密纤维混凝土预制板保湿养护大于1d时,拆除模具并对预制板底部进行拉毛粗糙化处理,粗糙深度控制在0.5~2mm范围内,继续常温养护至28d后可进行铺装拼接使用;S5.对钢面板进行喷砂除锈清洁处理,得到Sa2.5级以上清洁度、60~150μm粗糙度的钢面板基层,并在2h内完成高韧树脂防水粘结层施工;S6.以间距1.5~2.0m横纵向布置丁基橡胶自粘型垫胶条,垫胶条长度0.5~1.0m、宽度10~20cm、厚度1.0~2.0cm;再按双酚环氧树脂65~70份、聚酰胺固化剂12~16份、丁基缩水甘油醚活性稀释剂10~15份、丁腈橡胶增韧剂2~5份和石英粉增强剂2~5份制备高韧树脂胶结料,并以1.0~2.0kg/m 2涂布于钢面板基层上(错开已粘贴垫胶条位置),随后按3~5kg/m 2撒布1~5mm玄武岩碎石颗粒,常温养生1d后形成高韧性树脂防水粘结层(2);S7.对养护好的高密纤维混凝土底面进行清洁处理,并在预制板侧边对边锁扣锁槽(7)上下沿粘贴宽度1~2cm、厚度0.5~1.0cm的聚氨酯高弹性密封胶条,同时于圆弧凹凸面上按0.5~0.6kg/m 2刷涂高韧树脂胶黏剂,完成后立即进行预制板拼接定位;S8.预制板拼接时适当挤压接缝处高弹性聚氨酯密封胶条并固定位置,控制挤压后厚度<5mm;以环氧树脂65~70份、聚酰胺固化剂12~16份、聚异氰酸酯 粘合剂5~10份、丁基缩水甘油醚活性稀释剂4~6份和石英水性粉末增强剂2~5份制备高强界面粘结剂,采用高压注浆设备进行多孔同时灌注高强界面粘结剂,控制注浆速率0.5~1.0L/min,待预制板底部边缘树脂均匀溢出时停止注入,固定位置不动,常温养生1d后即形成高密纤维混凝土预制铺装层(3);S9.对高密纤维混凝土预制铺装层表面进行喷砂粗糙处理,按聚氨酯环氧树脂68~72份、双缩水甘油醚稀释剂12~15份、酸酐类固化剂12~16份、聚醚树脂活性增韧剂3~7份制备加固型环氧树脂,涂布量0.5~0.8kg/m 2;随后按双酚环氧树脂58~62份,聚酰胺固化剂15~20份、烯烃或脂环族单环氧树脂稀释剂3~8份、苯甲酸酯类增韧剂2~6份、有机硅耐湿热老化剂2~6份制备防护型环氧树脂,涂布量0.5~0.8kg/m 2;完成涂布后立即均布1~3mm细玄武岩碎石颗粒,常温养生1d后完成混凝土钢桥面铺装。
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CN110714408A (zh) * | 2019-10-22 | 2020-01-21 | 江苏中路交通科学技术有限公司 | 一种预制超高性能混凝土钢桥面铺装结构及制备方法 |
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CN113215982A (zh) * | 2021-05-11 | 2021-08-06 | 中交第三公路工程局有限公司 | 一种uhpc组合桥的面板结构及组合方法 |
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