CN106769392A - Test steel bridge deck and epoxy asphalt mixture are mated formation the method for interface cracking resistance - Google Patents

Test steel bridge deck and epoxy asphalt mixture are mated formation the method for interface cracking resistance Download PDF

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Publication number
CN106769392A
CN106769392A CN201611044636.1A CN201611044636A CN106769392A CN 106769392 A CN106769392 A CN 106769392A CN 201611044636 A CN201611044636 A CN 201611044636A CN 106769392 A CN106769392 A CN 106769392A
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Prior art keywords
test specimen
asphalt mixture
bridge deck
beam test
epoxy asphalt
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CN201611044636.1A
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CN106769392B (en
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李方超
姚波
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Nanjing University of Science and Technology
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Nanjing University of Science and Technology
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0003—Steady
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/0042—Pneumatic or hydraulic means
    • G01N2203/0048—Hydraulic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/006—Crack, flaws, fracture or rupture
    • G01N2203/0067—Fracture or rupture

Abstract

Mat formation the method for interface cracking resistance the present invention relates to a kind of steel bridge deck and epoxy asphalt mixture tested, its reserving gaps in the middle part of simulation sample, sample middle part is further applied load and by displacement transducer and its load of strain gauge real-time detection and mid-span deflection, calculating steel bridge deck and epoxy asphalt mixture according to load mid-span deflection curve mats formation the energy to failure at interfaceG f With the rupture strength at interfacef fb Equipment simple cheap needed for test method of the invention, method of testing is simple and easy to do, and test result is reliable and stable, and can accurately evaluate steel bridge deck and epoxy asphalt mixture using interphase fracture energy and rupture strength mats formation the cracking resistance at interface and the development condition in crack.

Description

Test steel bridge deck and epoxy asphalt mixture are mated formation the method for interface cracking resistance
Technical field
Mat formation interface rating technical field the invention belongs to steel bridge deck and epoxy asphalt mixture, and in particular to one kind is surveyed Examination steel bridge deck and epoxy asphalt mixture are mated formation interface anticracking performance testing method.
Background technology
Because steel plate and epoxy asphalt mixture are two kinds of different materials, in steel bridge deck pavement process, road Destruction generally occurs at steel plate and the interface of mating formation of epoxy asphalt mixture.Steel bridge deck and epoxy asphalt mixture are mated formation interface The presence of middle cracking resistance interferes significantly on the service life and service level on road surface.
Steel plate and epoxy asphalt mixture are mated formation after Interface Cracking, and the traffic loading for repeating is in the external world such as temperature various factors In the presence of produce crack tip at stress concentration, cause Large Area Cracking.On the one hand globality and the company of structure are destroyed Continuous property, on the other hand can promote crack further to develop, and steel plate corrosion can be made under rainwash so as to shorten making for road surface Use the life-span.
The content of the invention
Mat formation interface cracking resistance it is an object of the invention to provide one kind test steel bridge deck and epoxy asphalt mixture Method of testing, overcomes boundary layer and pave-load layer as a research method for entirety, so as to ignore boundary layer power in itself Learn characteristic.
The technical solution for realizing the object of the invention is：One kind test steel bridge deck and epoxy asphalt mixture are mated formation boundary The method of face cracking resistance, method and step is as follows：
Step 1, epoxy asphalt mixture are mated formation and are laid on steel bridge deck top surface to be measured, and steel bridge deck to be measured and epoxy are dripped Blue or green compound is mated formation and is prepared into cuboid beam test specimen, and the interface mated formation in steel bridge deck to be measured and epoxy asphalt mixture is reserved Gap, the set direction that stays of the reserving gaps is any one on epoxy asphalt mixture pave-load layer from cuboid beam test specimen Seam is stayed in heart direction thereto on side, after pouring the completion demoulding of cuboid beam test specimen, 60 ± 5min is incubated under 0~60 DEG C of environment.
Step 2, cuboid beam test specimen is provided with the side of reserving gaps where plane as bottom surface, vertically place, treating The bottom center that the bottom center and epoxy asphalt mixture for surveying steel bridge deck mat formation is respectively equipped with bearing.
Step 3, apply load, loading to the top surface interface of cuboid beam test specimen using MTS servo hydraulic systems Speed is 0.5~2mm/min, and reserving gaps top surface produces crack upwards.
Step 4, MTS servo hydraulic system Real-time Collection loads and mid-span deflection, until cuboid beam test specimen is split into Two halves.
Step 5, determine that test steel bridge deck and epoxy asphalt mixture are mated formation interface cracking resistance, i.e. energy to failure GfWith it is anti- Folding intensity ffb：
According to the load and mid-span deflection that are collected in step 4, with mid-span deflection as transverse axis, load is the longitudinal axis, makes lotus Load-mid-span deflection curve, calculates mid-span deflection from the interval areas surrounded with load-mid-span deflection curve of 0 to CTOD, as steel Floorings and epoxy asphalt mixture are mated formation the energy to failure G at interfacef, formula is as follows：
Wherein, ω0It is the area under load-amount of deflection (P- δ) full curve, unit is Nmm；N1It is cuboid beam between two hips The actual weight of test specimen, unit is N, δmaxThe amount of deflection of load(ing) point when being destroyed for cuboid beam test specimen, unit is mm, takes P- δ curves In maximum defluxion；AligIt is the flaw area for producing, unit is mm2, the flaw area is multiplied by crack for crack base length Carry out depth.
Steel bridge deck and epoxy asphalt mixture are mated formation the rupture strength f at interfacefbComputing formula is as follows：
Wherein, PmaxThe peak load measured during loading, unit is N, N2It is the actual weight of cuboid beam test specimen, unit It is N, l is the length of cuboid beam test specimen, and unit is mm；B is the width of cuboid beam test specimen, as crack base length, and unit is mm；D is the height of cuboid beam test specimen, and unit is mm, a0It is the reserved penetration of fracture of cuboid beam test specimen, unit is mm.
Compared with prior art, its remarkable advantage is the present invention：By the mechanical behavior for studying paving structure boundary layer Characteristic, obtains influence of the boundary layer to total, and equipment simple cheap needed for test method, method of testing is simple and easy to do, surveys Test result is reliable and stable.
Brief description of the drawings
Fig. 1 is that the present invention test steel bridge deck and epoxy asphalt mixture are mated formation the method flow diagram of interface cracking resistance.
Fig. 2 is cuboid beam test specimen schematic diagram of the present invention.
Fig. 3 is cuboid beam test specimen stress state schematic diagram of the present invention.
Fig. 4 is load-mid-span deflection (P- δ) curve map.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
With reference to Fig. 1 to Fig. 3, a kind of test steel bridge deck and epoxy asphalt mixture are mated formation the method for interface cracking resistance, Method and step is as follows：
Step 1, epoxy asphalt mixture are mated formation and are laid on steel bridge deck top surface to be measured, and steel bridge deck to be measured and epoxy are dripped Blue or green compound is mated formation and is prepared into cuboid beam test specimen, and the interface mated formation in steel bridge deck to be measured and epoxy asphalt mixture is reserved Gap, the set direction that stays of the reserving gaps is any one on epoxy asphalt mixture pave-load layer from cuboid beam test specimen Seam is stayed in heart direction thereto on side, after pouring the completion demoulding of cuboid beam test specimen, 60 ± 5min is incubated under 0~60 DEG C of environment.
Step 2, cuboid beam test specimen is provided with the side of reserving gaps where plane as bottom surface, vertically place, vertically Direction is the short transverse of cuboid beam test specimen, mats formation in bottom center and the epoxy asphalt mixture of steel bridge deck to be measured Bottom center is respectively equipped with bearing.Measure the physical dimension of cuboid beam test specimen and calculate N1And N2Value.
Step 3, apply load, loading to the top surface interface of cuboid beam test specimen using MTS servo hydraulic systems Speed is 0.5~2mm/min, and reserving gaps top surface produces crack upwards.
Step 4, MTS servo hydraulic system Real-time Collection loads and mid-span deflection, until cuboid beam test specimen is split into Two halves.
Step 5, determine that test steel bridge deck and epoxy asphalt mixture are mated formation interface cracking resistance, i.e. energy to failure GfWith it is anti- Folding intensity ffb：
According to the load and mid-span deflection that are collected in step 4, with mid-span deflection as transverse axis, load is the longitudinal axis, makes lotus Load-mid-span deflection curve, calculates mid-span deflection from the interval areas surrounded with load-mid-span deflection curve of 0 to CTOD, as steel Floorings and epoxy asphalt mixture are mated formation the energy to failure G at interfacef, formula is as follows：
Wherein, ω0It is the area under load-amount of deflection (P- δ) full curve, unit is Nmm；N1It is cuboid beam between two hips The actual weight of test specimen, unit is N, δmaxThe amount of deflection of load(ing) point when being destroyed for cuboid beam test specimen, unit is mm, takes P- δ curves In maximum defluxion；AligIt is the flaw area for producing, unit is mm2, the flaw area is multiplied by crack for crack base length Carry out depth.
Steel bridge deck and epoxy asphalt mixture are mated formation the rupture strength f at interfacefbComputing formula is as follows：
Wherein, PmaxThe peak load measured during loading, unit is N, N2It is the actual weight of cuboid beam test specimen, unit It is N, l is the length of cuboid beam test specimen, and unit is mm；B is the width of cuboid beam test specimen, as crack base length, and unit is mm；D is the height of cuboid beam test specimen, and unit is mm, a0It is the reserved penetration of fracture of cuboid beam test specimen, unit is mm.
The depth a of the reserving gaps0Meet and the height d of cuboid beam test specimen between：a0/d≤0.1。
Embodiment 1
With reference to Fig. 1~Fig. 4, a kind of test steel bridge deck and epoxy asphalt mixture are mated formation the method for interface cracking resistance, Method and step is as follows：
Die for molding is poured into after step 1, epoxy asphalt mixture slow heating that will be to be tested, placement after the completion of pouring Room temperature is cooled down, and when reaching demoulding condition, therefrom be transferred out test specimen by mould of dismantling, and obtains the length of unilateral edge reserving gaps Cube beam test specimen, as shown in Fig. 2 being put into sample after the demoulding in the insulating box for reaching experimental temperature, constant temperature keeps in 45 DEG C 60min.Steel bridge deck uses If type bituminous epoxies with the binding material at interface of mating formation, and its basic mechanical design feature is as shown in table 1.
The binding material technical performance of table 1
Asphalt pavement uses epoxy asphalt mixture, and binder is V-type bituminous epoxy, and bitumen aggregate ratio is 6.5%, test specimen space Rate is 2.2%.The level of epoxy asphalt mixture is with being shown in Table 2.
The asphalt mixture gradation of table 2
Step 2, cuboid beam test specimen is provided with the side of reserving gaps where plane as bottom surface, vertically place, vertically Direction is the short transverse of cuboid beam test specimen, with the physical dimension of vernier caliper measurement cuboid beam test specimen and calculates N1With N2Value.
Step 3, apply load, loading to the top surface interface of cuboid beam test specimen using MTS servo hydraulic systems Speed is 0.5mm/min, and reserving gaps top surface produces crack upwards, as shown in Figure 3.
Step 4, the Stress displacement sensor Real-time Collection load of MTS servo hydraulic systems and cuboid beam test specimen span centre Amount of deflection and the data that will be measured are transmitted to computer, and the passing time of strain gauge and displacement transducer is 0.5s, sensor Measuring accuracy is 99%, until cuboid beam test specimen is broken into two.
Load and mid-span deflection that step 5, computer are recorded according to step 4, with mid-span deflection as transverse axis, load is vertical Axle, makes load-mid-span deflection curve, calculates mid-span deflection from the interval faces surrounded with load-mid-span deflection curve of 0 to CTOD Product is steel bridge deck and epoxy asphalt mixture and mats formation the energy to failure G at interfacef, computing formula is as follows：
Wherein, ω0It is the area under load-amount of deflection (P- δ) full curve, unit is Nmm；N1It is cuboid beam between two hips The actual weight of test specimen, unit is N, δmaxThe amount of deflection of load(ing) point when being destroyed for cuboid beam test specimen, unit is mm, takes P- δ curves In maximum defluxion；AligIt is the flaw area for producing, unit is mm2, the flaw area is multiplied by crack for crack base length Carry out depth.
The rupture strength f at interfacefbComputing formula is as follows：
Wherein, PmaxThe peak load measured during loading, unit is N, N2It is the actual weight of cuboid beam test specimen, unit It is N, l is the length of cuboid beam test specimen, and unit is mm；B is the width of cuboid beam test specimen, as crack base length, and unit is mm；D is the height of cuboid beam test specimen, and unit is mm, a0It is the reserved penetration of fracture of cuboid beam test specimen, unit is mm.
So that it is determined that go out steel bridge deck and epoxy asphalt mixture mating formation the cracking resistance at interface.

Claims (2)

1. a kind of steel bridge deck and epoxy asphalt mixture tested is mated formation the method for interface cracking resistance, it is characterised in that method Step is as follows：
Step 1, epoxy asphalt mixture are mated formation and are laid on steel bridge deck top surface to be measured, and steel bridge deck to be measured and bituminous epoxy are mixed Conjunction material is mated formation and is prepared into cuboid beam test specimen, in the interface preset slot that steel bridge deck to be measured and epoxy asphalt mixture are mated formation Gap, the set direction that stays of the reserving gaps is any a line on epoxy asphalt mixture pave-load layer from cuboid beam test specimen Seam is stayed in heart direction thereto, after pouring the completion demoulding of cuboid beam test specimen, 60 ± 5min is incubated under 0~60 DEG C of environment；
Step 2, cuboid beam test specimen is provided with the side of reserving gaps where plane as bottom surface, vertically place, in steel to be measured The bottom center of floorings is respectively equipped with bearing with the bottom center that epoxy asphalt mixture is mated formation；
Step 3, load, loading speed are applied to the top surface interface of cuboid beam test specimen using MTS servo hydraulic systems It is 0.5~2mm/min, reserving gaps top surface produces crack upwards；
Step 4, MTS servo hydraulic system Real-time Collection loads and mid-span deflection, until cuboid beam test specimen is split into two；
Step 5, determine that test steel bridge deck and epoxy asphalt mixture are mated formation interface cracking resistance, i.e. energy to failure GfIt is strong with anti-folding Degree ffb：
According to the load and mid-span deflection that are collected in step 4, with mid-span deflection as transverse axis, load is the longitudinal axis, make load-across Middle sag curve, calculates mid-span deflection from the interval areas surrounded with load-mid-span deflection curve of 0 to CTOD, as Steel Bridge Deck Plate and epoxy asphalt mixture are mated formation the energy to failure G at interfacef, formula is as follows：
G f = ω 0 + 1 2 N 1 δ m a x A l i g ,
Wherein, ω0It is the area under load-amount of deflection (P- δ) full curve, unit is Nmm；N1It is cuboid beam test specimen between two hips Actual weight, unit is N, δmaxThe amount of deflection of load(ing) point when being destroyed for cuboid beam test specimen, unit is mm, in taking P- δ curves Maximum defluxion；AligIt is the flaw area for producing, unit is mm2, the flaw area is multiplied by crack developing for crack base length Depth；
Steel bridge deck and epoxy asphalt mixture are mated formation the rupture strength f at interfacefbComputing formula is as follows：
f f b = 1.5 × ( P m a x + N 2 / 2 ) l b ( d - a 0 ) 2
Wherein, PmaxThe peak load measured during loading, unit is N, N2It is the actual weight of cuboid beam test specimen, unit is N, l It is the length of cuboid beam test specimen, unit is mm；B is the width of cuboid beam test specimen, as crack base length, and unit is mm；D is The height of cuboid beam test specimen, unit is mm, a0It is the reserved penetration of fracture of cuboid beam test specimen, unit is mm.
2. test steel bridge deck and epoxy asphalt mixture is mated formation interface anticracking performance testing method according to claim 1, It is characterized in that：The depth a of the reserving gaps0Meet and the height d of cuboid beam test specimen between：a0/d≤0.1。
CN201611044636.1A 2016-11-24 2016-11-24 Test steel bridge deck and epoxy asphalt mixture are mated formation the method for interface cracking resistance Expired - Fee Related CN106769392B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107328669A (en) * 2017-07-04 2017-11-07 长安大学 Bridge asphalt pavement bulge diffusion process bar mechanics parameter testing device and method
CN109030204A (en) * 2018-07-03 2018-12-18 华北水利水电大学 The method and application of Fracture Toughness of Concrete and tensile strength are measured simultaneously

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CN103061271A (en) * 2012-12-25 2013-04-24 中铁大桥勘测设计院集团有限公司 Single plate force-bearing reinforcing method of hollow slab bridge
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CN104404850A (en) * 2014-11-18 2015-03-11 滁州市公路管理局 Method for improving bending tensile strength and durability of cement concrete for road
CN104897491A (en) * 2015-03-31 2015-09-09 南京交通职业技术学院 Testing apparatus and method for fatigue cracking of pavement on steel bridge
CN105019365A (en) * 2014-04-28 2015-11-04 郑州大学 Structure for rapidly restoring hinge joint of hollow slab bridge and construction method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101975701A (en) * 2010-09-10 2011-02-16 胡少伟 Concrete fracture test system and test method thereof
CN102392413A (en) * 2011-09-30 2012-03-28 宁波天意钢桥面铺装技术有限公司 Pavement structure of combined steel bridge deck and pavement method thereof
CN103061271A (en) * 2012-12-25 2013-04-24 中铁大桥勘测设计院集团有限公司 Single plate force-bearing reinforcing method of hollow slab bridge
CN103439190A (en) * 2013-08-30 2013-12-11 东南大学 Testing device for evaluating crack resistance of steel bridge deck pavement
CN103900957A (en) * 2014-04-28 2014-07-02 内蒙古工业大学 Method for testing interfacial bond behavior of road asphalt mixture
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CN104404850A (en) * 2014-11-18 2015-03-11 滁州市公路管理局 Method for improving bending tensile strength and durability of cement concrete for road
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107328669A (en) * 2017-07-04 2017-11-07 长安大学 Bridge asphalt pavement bulge diffusion process bar mechanics parameter testing device and method
CN109030204A (en) * 2018-07-03 2018-12-18 华北水利水电大学 The method and application of Fracture Toughness of Concrete and tensile strength are measured simultaneously
CN109030204B (en) * 2018-07-03 2021-02-09 华北水利水电大学 Method for simultaneously measuring fracture toughness and tensile strength of concrete and application

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