CN101767958A - High-performance light-weight epoxy asphalt concrete and preparation method thereof - Google Patents

High-performance light-weight epoxy asphalt concrete and preparation method thereof Download PDF

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Publication number
CN101767958A
CN101767958A CN200810242963A CN200810242963A CN101767958A CN 101767958 A CN101767958 A CN 101767958A CN 200810242963 A CN200810242963 A CN 200810242963A CN 200810242963 A CN200810242963 A CN 200810242963A CN 101767958 A CN101767958 A CN 101767958A
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light
epoxy asphalt
asphalt concrete
aggregate
performance
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CN200810242963A
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黄卫
钱振东
江陈龙
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Abstract

The invention relates to a bridge floor epoxy asphalt concrete paving material. Aiming at the situation that aggregate for the conventional epoxy asphalt concrete mostly adopts basalt, limestone and other materials and has relatively lower pendulum friction coefficient, the invention provides a high-performance light-weight epoxy asphalt concrete material which has low density, good friction performance and excellent road performance. The high-performance light-weight epoxy asphalt concrete material adopts the technical schemes that: the proportion of epoxy asphalt material to the aggregate of 6.5 to 15.5 percent, and the mass percentage of light aggregate for substituting common aggregate is 0 to 100 percent. A preparation method of the high-performance light-weight epoxy asphalt concrete material comprises the following steps of: adding hot light aggregate with a certain substitution proportion, the common aggregate and the epoxy asphalt into a blending pot according to the mass percentage and a certain sequence, stirring at 110 to 130 DEG C to obtain the product; and loading blended light-weight epoxy asphalt mixture into a paving device, and then paving and rolling according to a certain construction process. The invention not only solves the defects that the conventional steel bridge floor epoxy asphalt concrete has high pavement density and insufficient friction performance, but also realizes the aims of protecting the environment and saving energy sources and provides a lighter pavement material and a preparation method thereof for long-span bridges and special structures.

Description

High-performance light-weight epoxy asphalt concrete and preparation method thereof
Technical field
The present invention relates to a kind of highway structure material, specifically relate to a kind of deck paving epoxy asphalt concrete and preparation method thereof.
Background technology
At present, do not see both at home and abroad the deck paving patent about light-weight epoxy asphalt concrete, domestic only have " highway is with dredging mud ceramic granule asphalt concrete and method for formulating thereof " (publication number: CN101100360) about the application of haydite on the plain asphalt paving.Deck paving is compared with the plain asphalt paving is stressed, and deck paving is subjected to the influence of bridge girder structure and tectonic type bigger, and local deformaton is bigger under the vehicular load effect, stress and distortion situation complexity, and the working conditions of the layer of mating formation is also more unfavorable; The load size of mating formation is different to the influence of bridge and road, to almost not influence of the latter, but its influence to long-span bridge beam and special construction (as movable bridge) is remarkable, the load that the long-span bridge girder construction is born is self dead load mostly, the load of mating formation must overcome bigger dead load when making the bridge structure design greatly, and this also is that present deck paving is pursued a slim reason of mating formation.Therefore, the deck paving light-weight epoxy asphalt concrete is not the simple replacement to aforesaid patent, it except the requirement that will satisfy high-grade highway, should improve some performance technologies indexs to raw-material performance requriements, and the requirement of the technical feature of compound also is different with preparation technique.
The temperature sensitivity of epoxy asphalt concrete is less, and the high and low temperature performance is comparatively balanced, and domestic existing a plurality of priority projects adopt the epoxy asphalt concrete deck paving, as yangtze river in nanjing two bridges, the logical bridge of Soviet Union and Construction of Hangzhou Bay Cross-sea Bridge etc.Used gathering materials mainly is basalt aggregate, and the steel bridge deck paving that leads to bridge and these three bridges of Hangzhou Gulf Great Bridge as Wuhan Yangluo Changjiang River Highway Bridge, Soviet Union uses nearly 30,000 tons of basalt aggregate altogether, and this need exploit a large amount of mountains stone, causes ecological damage.In addition, now have the patented technology of various production light-weight aggregates, its application in the deck paving engineering will be striden the development generation far-reaching influence of footpath bridge and special construction bridge type (as movable bridge) to China's super large, and can effectively alleviate environment damage.For this reason, the present invention will study and how light-weight aggregate system be allotted the light-weight epoxy asphalt concrete pavement material that meets the demands.
Summary of the invention
For achieving the above object, the present invention is achieved by the following technical solutions:
A kind of deck paving high-performance light-weight aggregate epoxy asphalt concrete is characterized in that described high-performance light-weight aggregate epoxy asphalt concrete adopts the starting material of following weight parts ratio to be made:
Pitch 60-115 part
The common 55-835 part of gathering materials
Light-weight aggregate 45-800 part
Filler 35-55 part
The light-weight aggregate of one of described raw material will satisfy certain performance index, that is: light coarse aggregate: cylindrical compress strength 〉=6.5MPa, water-intake rate≤4.0%, density rating 600~1100, particle size range is 5~10mm, loss on ignition<3%, clay block and friable particle content<1%, Los Angeles abrasion loss≤35%, with asphalt adhesion 〉=4 grade, organic content is not deeper than reference colour, soundness (by mass loss)≤8%, boil mass loss≤5%, sulfide and sulphate content (by sulphur trioxide)<1%, polishing value (BPN)≤55.Light fine aggregate: density rating 500~1200, particle size range are 0~5mm, silt content<1.5%, sand equivalent 〉=60%, soundness≤8%, the fineness modulus variation coefficient≤7%.
Described common gathering materials is basalt aggregate, its ultimate compression strength 〉=120MPa, Los Angeles abrasion loss≤22%, crush values≤22%, water-intake rate≤1.5%, apparent density 〉=2650kg/m 3, faller gill shape content≤1.5%, soft rock content≤1%, adhesivity (SK 70#) 〉=4 grades, soundness≤5%, silt content<1%, sand equivalent 〉=60%.
Another former filler that gathers materials is a levigated limestone breeze, its density 〉=2500kg/m 3, hydrophilic coefficient≤1%, water ratio≤1%, plasticity index<4.0% adds heat-resistant quality: nondiscoloration.
Described pitch is bituminous epoxy, its tensile strength (23 ℃) 〉=1.5MPa, tension set (23 ℃) 〉=200%, soak consumption rate (23 ℃)≤35%, water-intake rate (7 days, 23 ℃)≤0.3%, the heat deflection temperature (HDT) under loading action :-18~-25 ℃, viscosity increases to time (121 ℃) 〉=50min of 1000cP, thermoset (300 ℃): do not melt.
As another aspect of the present invention, a kind of method for preparing above-mentioned high-performance light-weight aggregate epoxy asphalt concrete is characterized in that described preparation method comprises the steps:
(1) count by weight proportion, with the common 55-835 part of gathering materials after the preheating, light-weight aggregate 45-800 part, pitch 60-115 part, filler 35-55 part is mixed, and carries out mix in mix equipment;
(2) the above-mentioned asphalt that mixes and stirs is packed into pave in the laying equipment, then roll with rolling apparatus.
Bitumen aggregate ratio when wherein, above-mentioned raw materials mixes is 0.06~0.155.
Further, above-mentioned light-weight aggregate and rubble need preheating before mixing is mixed and stirred, and preheating temperature is identical with the bituminous epoxy Heating temperature, and the bituminous epoxy Heating temperature is 110~130 ℃.
As another technical scheme of the present invention, starting material mixing in step (1) is mixed and stirred in the process, order of addition(of ingredients) and mixing time are very crucial, be specially: exsiccant light-weight aggregate, rubble dry mixing in mixing apparatus that will be heated to assigned temperature are no less than 10s, mix and stir with the bituminous epoxy that is heated to assigned temperature then and be no less than 20s, filler after will drying then and above-mentioned bituminous epoxy mix continue to mix and stir and are no less than 60s, and mixing apparatus adopts dry method dust.
After the above-mentioned epoxy asphalt mixture that mixes and stirs dispatches from the factory, finish paving at the appointed time, and will carry out heat insulation work.
Embodiment
Embodiment one: each starting material is counted by weight proportion, gets 63 parts of bituminous epoxies, 740 parts of basalt aggregate, 141 parts of light coarse aggregates, 53 parts of light fine aggregates, 56 parts of limestone breezes.
Wherein, light coarse aggregate satisfies following performance: cylindrical compress strength 〉=6.5MPa, water-intake rate≤4.0%, density rating 600~1100, particle size range are 5~10mm, loss on ignition<3%, clay block and friable particle content<1%, Los Angeles abrasion loss≤35%, with asphalt adhesion 〉=4 grade, organic content is not deeper than reference colour, soundness (by mass loss)≤8%, boil mass loss≤5%, sulfide and sulphate content (by sulphur trioxide)<1%, polishing value (BPN)≤55; Light fine aggregate satisfies: density rating 500~1200, particle size range are 0~5mm, silt content<1.5%, sand equivalent 〉=60%, soundness≤8%, the fineness modulus variation coefficient≤7%.
The first step is carried out thermal pretreatment to basalt aggregate and light-weight aggregate, and its preheating temperature is identical with the bituminous epoxy preheating temperature, and the bituminous epoxy Heating temperature is 110~130 ℃.Second step was no less than 10s with basalt aggregate and the light-weight aggregate dry mixing in mixing apparatus that is heated to assigned temperature, added bituminous epoxy after the preheating then and mixed and stirred and be no less than 20s, added the limestone filler at last, and continued to mix and stir and be no less than 60s, finished product.Mixing apparatus adopts dry method dust.
With the above-mentioned epoxy asphalt mixture that the mixes and stirs transportation equipment of packing into, the meter bottom discharge time, must carry out the insulation measure in the transportation.Be transported to the working-yard, calculate the time opening that paves.Begin to pave, roll in the time of paving.When rolling, the 20t pneumatic-tired rollers are adopted in the first pressing of surface layer under the deck paving, the multiple two street rollers of wheel just that adopt 11-13t of pressing, and final pressure adopts the 20t pneumatic-tired rollers; The two wheel just of 11-13t street roller is adopted in the first pressing of deck paving upper layer, and multiple the pressure adopts 20t pneumatic-tired rollers, final pressure to adopt two street rollers of wheel just of 11-13t.First pressing, multiple press and final pressure all is not less than 4 times, and first pressing finishing temperature and final pressure finishing temperature must not be lower than the temperature of regulation.
In addition, the light-weight epoxy asphalt compound should be in hot weather construction, and wind speed is less than 10m/s.
Embodiment two: each starting material is counted by weight proportion, gets 82 parts of bituminous epoxies, 496 parts of basalt aggregate, 229 parts of light coarse aggregates, 137 parts of light fine aggregates, 55 parts of limestone breezes.
Carry out the preparation of light-weight epoxy asphalt concrete according to the step of embodiment one.
Embodiment three: each starting material is counted by weight proportion, gets 106 parts of bituminous epoxies, 228 parts of basalt aggregate, 223 parts of light coarse aggregates, 402 parts of light fine aggregates, 40 parts of limestone breezes.
Carry out the preparation of light-weight epoxy asphalt concrete according to the step of embodiment one.
Every performance index parameter of the light-weight epoxy asphalt concrete of above-mentioned three embodiment preparation is as shown in the table.
Performance index Scheme 1 Scheme 2 Scheme 3
Theoretical density kg/m 3 ??2429 ??2094 ??1606
Voidage % ??2.5 ??2.7 ??1.7
Stability kN ??47.82 ??61.12 ??55.79
Flow valuve 0.1mm ??33.3 ??35.6 ??24.1
The freeze thawing cleavage strength compares % ??95.61 ??90.64 ??89.68
Dynamic stability/mm ??25540 ??23281 ??20369
By every performance index of last table bituminous concrete as can be seen, performance satisfies the deck paving performance requriements fully on the described light-weight epoxy asphalt coagulation, resource has been saved in the use of light-weight aggregate, for the deck paving of long-span bridge beam and special construction bridge has alleviated dead load weight, very big social benefit and engineering significance have been brought.
Certainly; above-mentioned explanation is not to be limitation of the present invention; the present invention also is not limited in the foregoing description, and variation, remodeling, interpolation or replacement that those skilled in the art are done in essential scope of the present invention also should belong to protection scope of the present invention.

Claims (10)

1. a deck paving is characterized in that described high-performance light-weight aggregate epoxy asphalt concrete adopts the starting material of following weight parts ratio to be made with high-performance light-weight aggregate epoxy asphalt concrete:
Pitch 60-115 part
The common 55-835 part of gathering materials
Light-weight aggregate 45-800 part
Filler 35-55 part
2. deck paving according to claim 1 high-performance light-weight aggregate epoxy asphalt concrete is characterized in that described high-performance light-weight aggregate performance index are:
Light coarse aggregate: cylindrical compress strength 〉=6.5MPa, water-intake rate≤4.0%, density rating 600~1100, particle size range is 5~10mm, loss on ignition<3%, clay block and friable particle content<1%, Los Angeles abrasion loss≤35%, with asphalt adhesion 〉=4 grade, organic content is not deeper than reference colour, and soundness (by mass loss)≤8% is boiled mass loss≤5%, sulfide and sulphate content (by sulphur trioxide)<1%, polishing value (BPN)≤55.
Light fine aggregate: density rating 500~1200, particle size range are 0~5mm, silt content<1.5%, sand equivalent 〉=60%, soundness≤8%, the fineness modulus variation coefficient≤7%.
3. deck paving according to claim 1 and 2 high-performance light-weight aggregate epoxy asphalt concrete, it is characterized in that described common gathering materials is basalt aggregate, its ultimate compression strength 〉=120MPa, Los Angeles abrasion loss≤22%, crush values≤22%, water-intake rate≤1.5%, apparent density 〉=2650kg/m 3, faller gill shape content≤1.5%, soft rock content≤1%, adhesivity (SK 70#) 〉=4 grades, soundness≤5%, silt content<1%, sand equivalent 〉=60%.
4. deck paving according to claim 1 and 2 is characterized in that described filler is a levigated limestone breeze, its density 〉=2500kg/m with high-performance light-weight aggregate epoxy asphalt concrete 3, hydrophilic coefficient≤1%, water ratio≤1%, plasticity index<4.0% adds heat-resistant quality: nondiscoloration.
5. deck paving according to claim 4 high-performance light-weight aggregate epoxy asphalt concrete, it is characterized in that described pitch is bituminous epoxy, its tensile strength (23 ℃) 〉=1.5MPa, tension set (23 ℃) 〉=200% soaks consumption rate (23 ℃)≤35%, water-intake rate (7 days, 23 ℃)≤0.3%, heat deflection temperature (HDT) under loading action :-18~-25 ℃, viscosity increases to time (121 ℃) 〉=50min of 1000cP, thermoset (300 ℃): do not melt.
6. the method for formulating of a deck paving usefulness high-performance light-weight aggregate epoxy asphalt concrete is characterized in that described method for formulating comprises the steps:
(1) count by weight proportion, with the common 55-835 part of gathering materials after the preheating, light-weight aggregate 45-800 part, pitch 60-115 part, filler 35-55 part is mixed, and carries out mix in mix equipment;
(2) the above-mentioned asphalt that mixes and stirs is packed into pave in the laying equipment, then roll with rolling apparatus.
7. deck paving according to claim 6 high-performance light-weight aggregate epoxy asphalt concrete, the bitumen aggregate ratio that it is characterized in that described high-performance light-weight aggregate epoxy asphalt concrete is 0.06~0.155.
8. according to claim 6 or 7 described deck pavings high-performance light-weight aggregate epoxy asphalt concrete, it is characterized in that described light-weight aggregate and rubble need preheating before mixing is mixed and stirred, preheating temperature is identical with the bituminous epoxy Heating temperature, and the bituminous epoxy Heating temperature is 110~130 ℃.
9. the deck paving according to claim 8 preparation method of high-performance light-weight aggregate epoxy asphalt concrete, it is characterized in that mixing and stirring in the process in the starting material mixing of step (1), the exsiccant light-weight aggregate, the rubble dry mixing in mixing apparatus that are heated to assigned temperature are no less than 10s, mix and stir with the bituminous epoxy that is heated to assigned temperature and be no less than 20s, filler after will drying then and above-mentioned bituminous epoxy mix continue to mix and stir and are no less than 60s.
10. deck paving according to claim 9 is characterized in that finishing in the specified time after the above-mentioned epoxy asphalt mixture that mixes and stirs dispatches from the factory paving with the preparation method of high-performance light-weight aggregate epoxy asphalt concrete.
CN200810242963A 2008-12-31 2008-12-31 High-performance light-weight epoxy asphalt concrete and preparation method thereof Pending CN101767958A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101906756A (en) * 2010-07-26 2010-12-08 东南大学 Steel bridge deck asphalt concrete pavement accidental-damage repairing material and method
CN104326699A (en) * 2013-06-24 2015-02-04 因维亚铺筑技术有限责任公司 Sprayable coating composition and method for asphalt surfaces
CN105837093A (en) * 2016-04-18 2016-08-10 王国军 Concrete and manufacturing method thereof
CN110044813A (en) * 2019-04-11 2019-07-23 东南大学 A kind of detection method of frost region bituminous pavement wide temperature field coefficient of friction
CN111439956A (en) * 2020-04-07 2020-07-24 江苏中路工程技术研究院有限公司 Bridge deck pavement material with gradient function and preparation method thereof

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101906756A (en) * 2010-07-26 2010-12-08 东南大学 Steel bridge deck asphalt concrete pavement accidental-damage repairing material and method
CN104326699A (en) * 2013-06-24 2015-02-04 因维亚铺筑技术有限责任公司 Sprayable coating composition and method for asphalt surfaces
US9896602B2 (en) 2013-06-24 2018-02-20 Invia Pavement Technologies, LLC Sprayable coating composition and method for asphalt surfaces
CN104326699B (en) * 2013-06-24 2018-06-05 因维亚铺筑技术有限责任公司 For the Sprayable coating compositions and method of asphalt surface
CN105837093A (en) * 2016-04-18 2016-08-10 王国军 Concrete and manufacturing method thereof
CN110044813A (en) * 2019-04-11 2019-07-23 东南大学 A kind of detection method of frost region bituminous pavement wide temperature field coefficient of friction
CN110044813B (en) * 2019-04-11 2020-08-11 东南大学 Method for detecting wide-temperature-range friction coefficient of bituminous pavement in frozen region
CN111439956A (en) * 2020-04-07 2020-07-24 江苏中路工程技术研究院有限公司 Bridge deck pavement material with gradient function and preparation method thereof
CN111439956B (en) * 2020-04-07 2021-07-09 江苏中路工程技术研究院有限公司 Bridge deck pavement material with gradient function and preparation method thereof

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Application publication date: 20100707