CN102718438B - Bridge floor seamless expansion joint material with large expansion amount and preparation method thereof - Google Patents
Bridge floor seamless expansion joint material with large expansion amount and preparation method thereof Download PDFInfo
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- CN102718438B CN102718438B CN201210130811.4A CN201210130811A CN102718438B CN 102718438 B CN102718438 B CN 102718438B CN 201210130811 A CN201210130811 A CN 201210130811A CN 102718438 B CN102718438 B CN 102718438B
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Abstract
The invention relates to a bridge floor seamless expansion joint material with a large expansion amount and a preparation method thereof. The bridge floor seamless expansion joint material with a large expansion amount is characterized in that the material is prepared from 1# mineral aggregate, 2# mineral aggregate, rubber particles, a mineral powder filler, and a binder. Mass percentages of each raw material are: 60.0%-70.0% of the 1# mineral aggregate, 4.0%-14.0% of the 2# mineral aggregate, 4.0%-8.5% of the rubber particles, 4.0%-7.0% of the mineral powder filler, and 9.0%-17.5% of the binder. Compositions and mass percentages of each component of the binder are: 65.0%-75.0% of matrix asphalt, 20.0%-25.0% of rubber powder, and 5.0%-10.0% of SBS modifier. The material of the invention is characterized by having larger deformability at a low temperature without cracking and having good rutting resistance at a high-temperature. Expansion amount of the bridge floor seamless expansion joint material with a large expansion amount prepared by adopting the above method of the invention is no less than 50mm which exceeds expansion displacement limit of a conventional seamless expansion joint. The material can be promoted and applied to bridges with a medium span.
Description
Technical field
The invention belongs to pavement construction material and engineering field, be specifically related to the seamless expanded joint material of a kind of bridge floor and preparation thereof.
Technical background
Expansion joint is a very important link in bridge structure, and its Main Function is to adapt to due to the variation of temperature and humidity, concrete shrinkage and creep, the distortion that the sedimentation of Bridge Pier and beam-ends rotation etc. causes, and ensure that bridge floor is smooth-going, it is comfortable to drive a vehicle.With the seamless expansion joint of other types bridge floor Comparatively speaking, seamless expansion joint can provide an intact surface to concrete bridge structure, keep out water or objectionable constituent to structural damage, and the contraction can adaptive temperature causing, there is good globality, weather resistance, anti-drainage performance, be easy to maintenance and repairing, the advantages such as low noise, and applied widely both at home and abroad.
The key of the military service performance quality at the seamless expansion joint of bridge floor is the quality of mixture performance, and the performance of compound is made up of jointly special asphalt agglutinate and aggregate.Cold cracking, high temperature pass, with original pavement structure bonding deficiency be the typical disease of seamless expanded joint material.Domestic independent research some expanded joint materials, but compared with external imported materials and items, practical effect is undesirable, therefore domestic seamless expanded joint material market more depends on imported product.Current, the technical barrier that seamless expanded joint material faces is that stroke is little, is only applicable to little span bridge, and use range is limited.In addition,, under the extreme low temperature condition of High-cold regions, seamless expanded joint material bad adaptability need to have larger breakthrough on material at low temperature performance and stroke.
Pitch class material is the conventional consolidating material in seamless expansion joint, but its main bugbear facing is low temperature brittleness and high-temperature stability deficiency, must carry out high modification to obtain the elastomer material of excellent performance to it, and the current bi tumenf orr oad generally using is all difficult to reach requirement.Because seamless expansion joint packing material is rich in bituminous material, its low temperature extensional and high temperature traffic carrying capacity all depend on the performance of bituminous cements, and this low temperature and high temperature compatibility to bituminous material is had higher requirement.
The packing material at traditional seamless expansion joint is mainly made up of bituminous cements and building stones.Compared with agglutinate, building stones are rigid materials, and it plays the effect of weighting material, do not participate in the bulk deformation of packing material, in addition, building stones ratio used is high with respect to bituminous cements, and this makes the place one's entire reliance upon performance of agglutinate of the stroke of seamless expansion-contraction devices.In order to prepare the seamless expanded joint material with large stroke, need to break through the limitation of existing packing material on composition, emphasis solves packing material and does not participate in an energy of deformation difficult problem, makes each material composition cooperative transformation, to adapt to bridge complex deformation.
China's traffic and envrionment conditions are severe, and seamless expanded joint material is at high temperature prone to rut, and binding agent is more than needed causes trickling, occur at low temperatures cracking, with the phenomenon such as original road surface bonding failure.
Summary of the invention
The object of the present invention is to provide a kind of large seamless expanded joint material of stroke bridge floor and preparation method thereof, the seamless expanded joint material of bridge floor prepared by the method has good high-temperature stability and superior low-temperature cracking-resistance.
For achieving the above object, the technical solution adopted in the present invention is: a kind of large seamless expanded joint material of stroke bridge floor, it is characterized in that, it is prepared from by 1# mineral aggregate, 2# mineral aggregate, rubber grain, mineral powder filling materials and agglutinate, and the shared mass percent of each raw material is: 1# mineral aggregate 60.0%～70.0%, 2# mineral aggregate 4.0%～14.0%, rubber grain 4.0%～8.5%, mineral powder filling materials 4.0%～7.0%, agglutinate 9.0%～17.5%;
Wherein, the particle diameter of 1# mineral aggregate be 4.75mm～9.5mm(containing 4.75mm, the particle diameter > 4.75mm of 1# mineral aggregate and≤9.5mm), the particle diameter≤4.75mm of 2# mineral aggregate, the particle diameter≤4.75mm(of rubber grain is 0.3mm～4.75mm);
Each component and the mass percent thereof of described agglutinate are: matrix pitch 65.0～75.0%, rubber powder 20.0%～25.0%, SBS properties-correcting agent 5.0～10.0%.
Described mineral aggregate (1# mineral aggregate, 2# mineral aggregate) is basalt, limestone or andesite etc. (1# mineral aggregate, 2# mineral aggregate can be all basalt, limestone, andesite etc.), there is enough intensity (crush values≤20%), and the strict middle faller gill shape (elongated particles≤10%) that gathers materials of controlling.
Mineral powder filling materials (breeze) is limestone dust, particle diameter≤0.075mm.
Matrix pitch is high grade bi tumenf orr oad, and penetration degree scope is 80～120, and softening temperature is not less than 41 DEG C, and 15 DEG C of ductilities are not less than 100cm, as 90# bi tumenf orr oad, 110# bi tumenf orr oad or 130# bi tumenf orr oad; The size of rubber powder is 60 order～200 orders, adopts normal temperature crush method to produce (can be formed through normal temperature fragmentation by junked tire); SBS properties-correcting agent is star-shaped sbs properties-correcting agent (full name is vinylbenzene-divinyl-styrene triblock copolymer, or claims liquid SBS model star asphalt modifier).
Feature of the present invention is: the agglutinate of use is undertaken composite modified and obtained by matrix pitch, rubber powder and SBS properties-correcting agent, and rubber grain is for Substitute For Partial mineral aggregate.
A preparation method for the seamless expanded joint material of large stroke bridge floor, is characterized in that it comprises the steps:
1) prepare agglutinate:
1. by each component and mass percent thereof be: matrix pitch 65.0～75.0%, rubber powder 20.0%～25.0%, SBS properties-correcting agent 5.0～10.0%, chooses matrix pitch, rubber powder and SBS properties-correcting agent;
2. after first matrix pitch being heated to 140～150 DEG C of temperature, join in container, in the time that temperature is increased to 180～220 DEG C of design temperatures, to successively rubber powder and SBS properties-correcting agent be added in the container that fills matrix pitch, limit heating edge stirs with low-speed mixer, and stirring velocity is controlled within the scope of 100r/min～400r/min;
3. when rubber powder starts swelling, viscosity rise, stirring at need, slow down adding speed and continue and stirring of SBS properties-correcting agent;
4. repeatedly carry out the 3. operation of step, until SBS properties-correcting agent is all added, then the rotating speed of low-speed mixer is raise, maintain 400r/min～750r/min, until composition is substantially even;
5. use high speed shear stirrer instead and stir, the speed of shearing rotor is 3000r/min～5000r/min, and controls temperature within the scope of 180 DEG C～220 DEG C, and churning time is 60min, obtains agglutinate;
2) press 1# mineral aggregate 60.0%～70.0%, 2# mineral aggregate 4.0%～14.0%, rubber grain 4.0%～8.5%, mineral powder filling materials 4.0%～7.0%, agglutinate 9.0%～17.5%, choose 1# mineral aggregate, 2# mineral aggregate, rubber grain, mineral powder filling materials and agglutinate;
Wherein, the particle diameter of 1# mineral aggregate be 4.75mm～9.5mm(containing 4.75mm, the particle diameter > 4.75mm of 1# mineral aggregate and≤9.5mm), the particle diameter≤4.75mm of 2# mineral aggregate, the particle diameter≤4.75mm(of rubber grain is 0.3mm～4.75mm);
Described mineral aggregate (1# mineral aggregate, 2# mineral aggregate) is basalt, limestone or andesite etc. (1# mineral aggregate, 2# mineral aggregate can be all basalt, limestone, andesite etc.), there is enough intensity (crush values≤20%), and the strict middle faller gill shape (elongated particles≤10%) that gathers materials of controlling; Mineral powder filling materials (breeze) is limestone dust, particle diameter≤0.075mm;
3) build:
1. 1# mineral aggregate and 2# mineral aggregate are heated to 280 ± 20 DEG C, pouring temperature into is 220 DEG C mixing in pot, then the rubber grain under normal temperature is poured into and mixed in pot, stirs in advance 90s;
2. the agglutinate of 200 DEG C is poured into and is mixed in pot, stir 90s;
3. finally mineral powder filling materials (or claiming breeze) is joined to mix in pot and stirs 90s, obtain the seamless expanded joint material of large stroke bridge floor, then build (directly pour in mould, leveling surface, without rolling).
Rubber grain also junked tire form through normal temperature fragmentation, for substituting the mineral aggregate of grating part, distribution of sizes will meet table 1 requirement;
The distribution of sizes of table 1 rubber grain
For fear of rubber grain prepared by the present invention the interference effect of material skeleton, rubber grain only substitutes thinner 2# mineral aggregate, and adopts gap gradation synthetic, nominal maximum particle diameter is 9.5mm, void in mineral aggregate is 20～40%, has good rheological property in construction process, is convenient to moulding; Formate gradation composition is as shown in table 2;
The formate gradation composition design of the seamless expanded joint material of table 2 bridge floor
Agglutinate modified test research through early stage is found, the composite modified agglutinate of preparing of rubber powder and SBS is all better than matrix pitch, softening temperature and penetration degree are significantly promoted, rubber powder, SBS properties-correcting agent forms three-phase composite system in pitch, rubber powder and SBS properties-correcting agent can be dispersed in pitch mutually in, and thermotolerance and the thermostability of rubber powder and SBS properties-correcting agent self will be higher than pitches, in pitch, absorb a large amount of light component, there is swelling action, therefore in the structure of pitch, be difficult for occurring to flow, softening temperature has significantly and rises, also there is the phenomenon reducing in penetration degree.The modifying function that can sum up rubber powder and SBS properties-correcting agent from frequency sweeping, temperature scanning, high temperature creep, low temperature stress relaxation result has improved the temperature sensitivity of matrix pitch, the high temperature rutting resistance and the crack resistance at low-temperature that have significantly improved pitch, ageing-resistant ability is also strengthened.
Optimize the embodiment of two kinds of agglutinate modifications, being respectively A(is the agglutinate in embodiment 1,2 or 3) and B(be the agglutinate in embodiment 4,5 or 6), in option A, be 90# bi tumenf orr oad by the weight ratio of each component: rubber powder: SBS properties-correcting agent=70:25:5; It in option b, is 90# bi tumenf orr oad by the weight ratio of each component: rubber powder: SBS properties-correcting agent=70:20:10.Under two schemes, the test-results of the conventional three norms of agglutinate is as shown in table 3.Agglutinate performance in visible embodiment B is better than embodiment A.
The three norms test-results of agglutinate under table 3 different embodiments
Rubber grain substitutes mineral aggregate Proportionality design: because rubber grain proportion is less than common mineral aggregate, adopt mass ratio design can affect the skeleton structure of compound completely, thus adopt volumetric method design, then be converted to mass ratio and prepare burden.Hour, rubber grain is filled in the space of compound the ratio that substitutes mineral aggregate when rubber grain completely, as shown in Figure 1, the now anti-rut excellent property of high temperature, low temperature strain is less; In the time that rubber grain substitution ratio is larger, rubber grain is partially filled in the space of compound, and part, in skeleton gap, as shown in Figure 2, has now reduced the high temperature stability performance of compound, but low temperature strain increases, and has improved low temperature cracking resistance energy.As for determining of agglutinate consumption, consider that rubber grain can absorb the oil content in pitch and produce swelling.Swelling result makes rubber particle surface produce certain coalescence effect on the one hand, is conducive to rubber grain and agglutinate and rock consolidation and is integrated, and makes on the other hand agglutinate consumption increase.Therefore agglutinate consumption increases along with the increase of rubber grain substitution ratio.
The advantage of the seamless expanded joint material of high stroke bridge floor provided by the invention is by regulating rubber grain to substitute the ratio of mineral aggregate, to adapt to seamless expansion gap device displacement at low temperatures, takes into account high-temperature behavior simultaneously.Make it there is at low temperatures larger strain level, under high temperature, there is less permanent deformation.The present invention not only takes full advantage of junked tire, reduce environmental pollution and low cost and other advantages, also there is at low temperatures snappiness and high ductibility, at high temperature there is good rutting resistance, and reach the effect of noise reduction and break through the restriction that seamless expanded joint material can only be used for little span bridge, may be used in middle span bridge.
The invention has the beneficial effects as follows: by rubber powder modified asphalt agglutinate, adopt rubber grain to replace the mineral aggregate of part simultaneously, in conjunction with gradation design principle, prepare the seamless expanded joint material of large stroke bridge floor, be characterized in having at low temperatures larger deformability and unlikely cracking, at high temperature there is good rutting resistance, illustrated that the seamless expanded joint material of bridge floor that the present invention obtains has good high-temperature stability and superior low-temperature cracking-resistance.Stroke >=the 50mm of the seamless expanded joint material of large stroke bridge floor prepared by employing aforesaid method, has broken through the telescopic displacement restriction at conventional seamless expansion joint, can in the bridge of middle span, be applicable.
Brief description of the drawings
Fig. 1 be in the embodiment of the present invention 4 rubber grain substitute part mineral aggregate quality in compound 5.0% time cross-sectional scans figure.
Fig. 2 be in the embodiment of the present invention 6 rubber grain substitute part mineral aggregate quality in compound 7.5% time cross-sectional scans figure.
Embodiment
In order to understand better the present invention, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention is not only confined to the following examples.
embodiment 1
A preparation method for the seamless expanded joint material of large stroke bridge floor, it comprises the steps:
1) prepare agglutinate:
1. by each component and mass percent thereof be: matrix pitch (90# bi tumenf orr oad) 70.0%, rubber powder 25.0%, SBS properties-correcting agent 5.0%, chooses matrix pitch, rubber powder and SBS properties-correcting agent;
2. after first matrix pitch being heated to 140～150 DEG C of temperature, join in metal vessel, in the time that temperature is increased to 180 DEG C of design temperatures, successively rubber powder and SBS properties-correcting agent are slowly added to (described slowly adding refers to that adding speed is 0.2～0.3mL/s) in the metal vessel that fills matrix pitch, in process furnace top, heating edge stirs with low-speed mixer, and stirring velocity is controlled within the scope of 100r/min～400r/min;
3. when rubber powder starts swelling, viscosity rise, stirring at need, slow down adding speed and continuing slowly to stir (described slowly adding refers to that adding speed is 0.1～0.2mL/s) of SBS properties-correcting agent;
4. repeatedly carry out the 3. operation of step, until SBS properties-correcting agent is all added, the time that all SBS properties-correcting agent adds is approximately 10min; Again the rotating speed of low-speed mixer is raise, maintain 400r/min～750r/min, until composition is substantially even;
5. use high speed shear stirrer instead and stir, the speed of shearing rotor is 3000r/min～5000r/min, and controls asphalt temperature within the scope of 180 DEG C～220 DEG C, and churning time is 60min, obtains agglutinate (or claiming modifying asphalt agglutinate);
Its three norms of described agglutinate is respectively: 88 DEG C of softening temperatures, penetration degree (25 DEG C) 41, ductility (5 DEG C) 33.
2) press 1# mineral aggregate 65.4%, 2# mineral aggregate 12.1%, rubber grain 5.0%, mineral powder filling materials 6.8%, agglutinate 10.7%, choose 1# mineral aggregate, 2# mineral aggregate, rubber grain, mineral powder filling materials and agglutinate;
Wherein, the particle diameter of 1# mineral aggregate be 4.75mm～9.5mm(containing 4.75mm, the particle diameter > 4.75mm of 1# mineral aggregate and≤9.5mm), the particle diameter≤4.75mm of 2# mineral aggregate, the particle diameter≤4.75mm(of rubber grain is 0.3mm～4.75mm);
Described mineral aggregate (1# mineral aggregate, 2# mineral aggregate) is andesite (1# mineral aggregate, 2# mineral aggregate are andesite), and its crush values is 12%, and elongated particles is 6%; Mineral powder filling materials (breeze) is limestone dust, particle diameter≤0.075mm;
Described rubber grain is to be formed through normal temperature fragmentation by the junked tire of bogie, for substituting the 2# mineral aggregate of grating part.
What described large stroke bridge floor is seamless expanded joint material adopted is gap grading, and nominal maximum particle diameter is 9.5mm, and void in mineral aggregate is 20～40%.
3) build:
1. 1# mineral aggregate and 2# mineral aggregate are heated to 280 ± 20 DEG C, pouring temperature into is 220 DEG C mixing in pot, then the rubber grain under normal temperature is poured into and mixed in pot, stirs in advance 90s;
2. the agglutinate of 200 DEG C is poured into and is mixed in pot, stir 90s;
3. finally mineral powder filling materials (or claiming breeze) is joined to mix in pot and stirs 90s, obtain the seamless expanded joint material of large stroke bridge floor, then build (directly pour in mould, leveling surface, without rolling).
According to " highway engineering pitch and Asphalt Mixture Experiment code " (JTJ E20-2011), high-temperature stability and low-temperature cracking-resistance to the seamless expanded joint material of bridge floor in embodiment are studied, respectively using high-temperature rutting test and low temperature three point bending test as the important indicator of controlling expanded joint material performance, test-results is as shown in table 4, has illustrated that the seamless expanded joint material of bridge floor that the embodiment of the present invention obtains has good high-temperature stability and superior low-temperature cracking-resistance.
embodiment 2
A preparation method for the seamless expanded joint material of large stroke bridge floor, it comprises the steps:
1) prepare agglutinate:
1. by each component and mass percent thereof be: matrix pitch (90# bi tumenf orr oad) 70.0%, rubber powder 25.0%, SBS properties-correcting agent 5.0%, chooses matrix pitch, rubber powder and SBS properties-correcting agent;
2. after first matrix pitch being heated to 140～150 DEG C of temperature, join in metal vessel, in the time that temperature is increased to 180 DEG C of design temperatures, successively rubber powder and SBS properties-correcting agent are slowly added to (described slowly adding refers to that adding speed is 0.2～0.3mL/s) in the metal vessel that fills matrix pitch, in process furnace top, heating edge stirs with low-speed mixer, and stirring velocity is controlled within the scope of 100r/min～400r/min;
3. when rubber powder starts swelling, viscosity rise, stirring at need, slow down adding speed and continuing slowly to stir (described slowly adding refers to that adding speed is 0.1～0.2mL/s) of SBS properties-correcting agent;
4. repeatedly carry out the 3. operation of step, until SBS properties-correcting agent is all added, the time that all SBS properties-correcting agent adds is approximately 10min; Again the rotating speed of low-speed mixer is raise, maintain 400r/min～750r/min, until composition is substantially even;
5. use high speed shear stirrer instead and stir, the speed of shearing rotor is 3000r/min～5000r/min, and controls asphalt temperature within the scope of 180 DEG C～220 DEG C, and churning time is 60min, obtains agglutinate (or claiming modifying asphalt agglutinate);
Its three norms of described agglutinate is respectively: 88 DEG C of softening temperatures, penetration degree (25 DEG C) 41, ductility (5 DEG C) 33.
2) press 1# mineral aggregate 66.3%, 2# mineral aggregate 8.4%, rubber grain 6.8%, mineral powder filling materials 5.7%, agglutinate 12.8%, choose 1# mineral aggregate, 2# mineral aggregate, rubber grain, mineral powder filling materials and agglutinate;
Wherein, the particle diameter of 1# mineral aggregate be 4.75mm～9.5mm(containing 4.75mm, the particle diameter > 4.75mm of 1# mineral aggregate and≤9.5mm), the particle diameter≤4.75mm of 2# mineral aggregate, the particle diameter≤4.75mm(of rubber grain is 0.3mm～4.75mm);
Described mineral aggregate (1# mineral aggregate, 2# mineral aggregate) adopts andesite, and its crush values is 12%, and elongated particles is 6%; Described rubber grain is to be formed through normal temperature fragmentation by the junked tire of bogie, for substituting the 2# mineral aggregate of grating part.
Described breeze is limestone dust, particle diameter≤0.075mm.
What described large stroke bridge floor is seamless expanded joint material adopted is gap grading, and nominal maximum particle diameter is 9.5mm, and void in mineral aggregate is 20～40%.
3) build:
1. 1# mineral aggregate and 2# mineral aggregate are heated to 280 ± 20 DEG C, pouring temperature into is 220 DEG C mixing in pot, then the rubber grain under normal temperature is poured into and mixed in pot, stirs in advance 90s;
2. the agglutinate of 200 DEG C is poured into and is mixed in pot, stir 90s;
3. finally mineral powder filling materials (or claiming breeze) is joined to mix in pot and stirs 90s, obtain the seamless expanded joint material of large stroke bridge floor, then build (directly pour in mould, leveling surface, without rolling).
According to " highway engineering pitch and Asphalt Mixture Experiment code " (JTJ E20-2011), high-temperature stability and low-temperature cracking-resistance to the seamless expanded joint material of bridge floor in embodiment are studied, respectively using high-temperature rutting test and low temperature three point bending test as the important indicator of controlling expanded joint material performance, test-results is as shown in table 4, has illustrated that the seamless expanded joint material of bridge floor that the embodiment of the present invention obtains has good high-temperature stability and superior low-temperature cracking-resistance.
embodiment 3
A preparation method for the seamless expanded joint material of large stroke bridge floor, it comprises the steps:
1) prepare agglutinate:
1. by each component and mass percent thereof be: matrix pitch (90# bi tumenf orr oad) 70.0%, rubber powder 25.0%, SBS properties-correcting agent 5.0%, chooses matrix pitch, rubber powder and SBS properties-correcting agent;
2. after first matrix pitch being heated to 140～150 DEG C of temperature, join in metal vessel, in the time that temperature is increased to 180 DEG C of design temperatures, successively rubber powder and SBS properties-correcting agent are slowly added to (described slowly adding refers to that adding speed is 0.2～0.3mL/s) in the metal vessel that fills matrix pitch, in process furnace top, heating edge stirs with low-speed mixer, and stirring velocity is controlled within the scope of 100r/min～400r/min;
3. when rubber powder starts swelling, viscosity rise, stirring at need, slow down adding speed and continuing slowly to stir (described slowly adding refers to that adding speed is 0.1～0.2mL/s) of SBS properties-correcting agent;
4. repeatedly carry out the 3. operation of step, until SBS properties-correcting agent is all added, the time that all SBS properties-correcting agent adds is approximately 10min; Again the rotating speed of low-speed mixer is raise, maintain 400r/min～750r/min, until composition is substantially even;
5. use high speed shear stirrer instead and stir, the speed of shearing rotor is 3000r/min～5000r/min, and controls asphalt temperature within the scope of 180 DEG C～220 DEG C, and churning time is 60min, obtains agglutinate (or claiming modifying asphalt agglutinate);
Its three norms of described agglutinate is respectively: 88 DEG C of softening temperatures, penetration degree (25 DEG C) 41, ductility (5 DEG C) 33.
2) press 1# mineral aggregate 67.9%, 2# mineral aggregate 5.2%, rubber grain 7.5%, mineral powder filling materials 5.2%, agglutinate 14.2%, choose 1# mineral aggregate, 2# mineral aggregate, rubber grain, mineral powder filling materials and agglutinate;
Wherein, the particle diameter of 1# mineral aggregate be 4.75mm～9.5mm(containing 4.75mm, the particle diameter > 4.75mm of 1# mineral aggregate and≤9.5mm), the particle diameter≤4.75mm of 2# mineral aggregate, the particle diameter≤4.75mm(of rubber grain is 0.3mm～4.75mm);
Described mineral aggregate (1# mineral aggregate, 2# mineral aggregate) adopts andesite, and its crush values is 12%, and elongated particles is 6%; Mineral powder filling materials (breeze) is limestone dust, particle diameter≤0.075mm;
Described rubber grain is to be formed through normal temperature fragmentation by the junked tire of bogie, for substituting the 2# mineral aggregate of grating part.
What described large stroke bridge floor is seamless expanded joint material adopted is gap grading, and nominal maximum particle diameter is 9.5mm, and void in mineral aggregate is 20～40%.
3) build:
1. 1# mineral aggregate and 2# mineral aggregate are heated to 280 ± 20 DEG C, pouring temperature into is 220 DEG C mixing in pot, then the rubber grain under normal temperature is poured into and mixed in pot, stirs in advance 90s;
2. the agglutinate of 200 DEG C is poured into and is mixed in pot, stir 90s;
3. finally mineral powder filling materials (or claiming breeze) is joined to mix in pot and stirs 90s, obtain the seamless expanded joint material of large stroke bridge floor, then build (directly pour in mould, leveling surface, without rolling).
According to " highway engineering pitch and Asphalt Mixture Experiment code " (JTJ E20-2011), high-temperature stability and low-temperature cracking-resistance to the seamless expanded joint material of bridge floor in embodiment are studied, respectively using high-temperature rutting test and low temperature three point bending test as the important indicator of controlling expanded joint material performance, test-results is as shown in table 4, has illustrated that the seamless expanded joint material of bridge floor that the embodiment of the present invention obtains has good high-temperature stability and superior low-temperature cracking-resistance.
embodiment 4
A preparation method for the seamless expanded joint material of large stroke bridge floor, it comprises the steps:
1) prepare agglutinate:
1. by each component and mass percent thereof be: matrix pitch (90# bi tumenf orr oad) 70.0%, rubber powder 20.0%, SBS properties-correcting agent 10.0%, chooses matrix pitch, rubber powder and SBS properties-correcting agent;
2. after first matrix pitch being heated to 140～150 DEG C of temperature, join in metal vessel, in the time that temperature is increased to 180 DEG C of design temperatures, successively rubber powder and SBS properties-correcting agent are slowly added to (described slowly adding refers to that adding speed is 0.2～0.3mL/s) in the metal vessel that fills matrix pitch, in process furnace top, heating edge stirs with low-speed mixer, and stirring velocity is controlled within the scope of 100r/min～400r/min;
3. when rubber powder starts swelling, viscosity rise, stirring at need, slow down adding speed and continuing slowly to stir (described slowly adding refers to that adding speed is 0.1～0.2mL/s) of SBS properties-correcting agent;
4. repeatedly carry out the 3. operation of step, until SBS properties-correcting agent is all added, the time that all SBS properties-correcting agent adds is approximately 10min; Again the rotating speed of low-speed mixer is raise, maintain 400r/min～750r/min, until composition is substantially even;
5. use high speed shear stirrer instead and stir, the speed of shearing rotor is 3000r/min～5000r/min, and controls asphalt temperature within the scope of 180 DEG C～220 DEG C, and churning time is 60min, obtains agglutinate (or claiming modifying asphalt agglutinate);
Its three norms of described agglutinate is respectively: 91 DEG C of softening temperatures, penetration degree (25 DEG C) 40, ductility (5 DEG C) 52.
2) press 1# mineral aggregate 65.4%, 2# mineral aggregate 12.1%, rubber grain 5.0%, mineral powder filling materials 6.8%, agglutinate 10.7%, choose 1# mineral aggregate, 2# mineral aggregate, rubber grain, mineral powder filling materials and agglutinate;
Wherein, the particle diameter of 1# mineral aggregate be 4.75mm～9.5mm(containing 4.75mm, the particle diameter > 4.75mm of 1# mineral aggregate and≤9.5mm), the particle diameter≤4.75mm of 2# mineral aggregate, the particle diameter≤4.75mm(of rubber grain is 0.3mm～4.75mm);
Described mineral aggregate (1# mineral aggregate, 2# mineral aggregate) adopts andesite, and its crush values is 12%, and elongated particles is 6%; Mineral powder filling materials (breeze) is limestone dust, particle diameter≤0.075mm;
Described rubber grain is to be formed through normal temperature fragmentation by the junked tire of bogie, for substituting the 2# mineral aggregate of grating part.
What described large stroke bridge floor is seamless expanded joint material adopted is gap grading, and nominal maximum particle diameter is 9.5mm, and void in mineral aggregate is 20～40%.
3) build:
1. 1# mineral aggregate and 2# mineral aggregate are heated to 280 ± 20 DEG C, pouring temperature into is 220 DEG C mixing in pot, then the rubber grain under normal temperature is poured into and mixed in pot, stirs in advance 90s;
2. the agglutinate of 200 DEG C is poured into and is mixed in pot, stir 90s;
3. finally mineral powder filling materials (or claiming breeze) is joined to mix in pot and stirs 90s, obtain the seamless expanded joint material of large stroke bridge floor, then build (directly pour in mould, leveling surface, without rolling).
According to " highway engineering pitch and Asphalt Mixture Experiment code " (JTJ E20-2011), high-temperature stability and low-temperature cracking-resistance to the seamless expanded joint material of bridge floor in embodiment are studied, respectively using high-temperature rutting test and low temperature three point bending test as the important indicator of controlling expanded joint material performance, test-results is as shown in table 4, has illustrated that the seamless expanded joint material of bridge floor that the embodiment of the present invention obtains has good high-temperature stability and superior low-temperature cracking-resistance.
embodiment 5
A preparation method for the seamless expanded joint material of large stroke bridge floor, it comprises the steps:
1) prepare agglutinate:
1. by each component and mass percent thereof be: matrix pitch (90# bi tumenf orr oad) 70.0%, rubber powder 20.0%, SBS properties-correcting agent 10.0%, chooses matrix pitch, rubber powder and SBS properties-correcting agent;
2. after first matrix pitch being heated to 140～150 DEG C of temperature, join in metal vessel, in the time that temperature is increased to 190 DEG C of design temperatures, successively rubber powder and SBS properties-correcting agent are slowly added to (described slowly adding refers to that adding speed is 0.2～0.3mL/s) in the metal vessel that fills matrix pitch, in process furnace top, heating edge stirs with low-speed mixer, and stirring velocity is controlled within the scope of 100r/min～400r/min;
3. when rubber powder starts swelling, viscosity rise, stirring at need, slow down adding speed and continuing slowly to stir (described slowly adding refers to that adding speed is 0.1～0.2mL/s) of SBS properties-correcting agent;
4. repeatedly carry out the 3. operation of step, until SBS properties-correcting agent is all added, the time that all SBS properties-correcting agent adds is approximately 10min; Again the rotating speed of low-speed mixer is raise, maintain 400r/min～750r/min, until composition is substantially even;
5. use high speed shear stirrer instead and stir, the speed of shearing rotor is 3000r/min～5000r/min, and controls asphalt temperature within the scope of 180 DEG C～220 DEG C, and churning time is 60min, obtains agglutinate (or claiming modifying asphalt agglutinate);
Its three norms of described agglutinate is respectively: 91 DEG C of softening temperatures, penetration degree (25 DEG C) 40, ductility (5 DEG C) 52.
2) press 1# mineral aggregate 66.3%, 2# mineral aggregate 8.4%, rubber grain 6.8%, mineral powder filling materials 5.7%, agglutinate 12.8%, choose 1# mineral aggregate, 2# mineral aggregate, rubber grain, mineral powder filling materials and agglutinate;
Wherein, the particle diameter of 1# mineral aggregate be 4.75mm～9.5mm(containing 4.75mm, the particle diameter > 4.75mm of 1# mineral aggregate and≤9.5mm), the particle diameter≤4.75mm of 2# mineral aggregate, the particle diameter≤4.75mm(of rubber grain is 0.3mm～4.75mm);
Described mineral aggregate (1# mineral aggregate, 2# mineral aggregate) adopts andesite, and its crush values is 12%, and elongated particles is 6%; Mineral powder filling materials (breeze) is limestone dust, particle diameter≤0.075mm;
Described rubber grain is to be formed through normal temperature fragmentation by the junked tire of bogie, for substituting the 2# mineral aggregate of grating part.
What described large stroke bridge floor is seamless expanded joint material adopted is gap grading, and nominal maximum particle diameter is 9.5mm, and void in mineral aggregate is 20～40%.
3) build:
1. 1# mineral aggregate and 2# mineral aggregate are heated to 280 ± 20 DEG C, pouring temperature into is 220 DEG C mixing in pot, then the rubber grain under normal temperature is poured into and mixed in pot, stirs in advance 90s;
2. the agglutinate of 200 DEG C is poured into and is mixed in pot, stir 90s;
3. finally mineral powder filling materials (or claiming breeze) is joined to mix in pot and stirs 90s, obtain the seamless expanded joint material of large stroke bridge floor, then build (directly pour in mould, leveling surface, without rolling).
According to " highway engineering pitch and Asphalt Mixture Experiment code " (JTJ E20-2011), high-temperature stability and low-temperature cracking-resistance to the seamless expanded joint material of bridge floor in embodiment are studied, respectively using high-temperature rutting test and low temperature three point bending test as the important indicator of controlling expanded joint material performance, test-results is as shown in table 4, has illustrated that the seamless expanded joint material of bridge floor that the embodiment of the present invention obtains has good high-temperature stability and superior low-temperature cracking-resistance.
embodiment 6
A preparation method for the seamless expanded joint material of large stroke bridge floor, it comprises the steps:
1) prepare agglutinate:
1. by each component and mass percent thereof be: matrix pitch (90# bi tumenf orr oad) 70.0%, rubber powder 20.0%, SBS properties-correcting agent 10.0%, chooses matrix pitch, rubber powder and SBS properties-correcting agent;
2. after first matrix pitch being heated to 140～150 DEG C of temperature, join in metal vessel, in the time that temperature is increased to 180 DEG C of design temperatures, successively rubber powder and SBS properties-correcting agent are slowly added to (described slowly adding refers to that adding speed is 0.2～0.3mL/s) in the metal vessel that fills matrix pitch, in process furnace top, heating edge stirs with low-speed mixer, and stirring velocity is controlled within the scope of 100r/min～400r/min;
3. when rubber powder starts swelling, viscosity rise, stirring at need, slow down adding speed and continuing slowly to stir (described slowly adding refers to that adding speed is 0.1～0.2mL/s) of SBS properties-correcting agent;
4. repeatedly carry out the 3. operation of step, until SBS properties-correcting agent is all added, the time that all SBS properties-correcting agent adds is approximately 10min; Again the rotating speed of low-speed mixer is raise, maintain 400r/min～750r/min, until composition is substantially even;
5. use high speed shear stirrer instead and stir, the speed of shearing rotor is 3000r/min～5000r/min, and controls asphalt temperature within the scope of 180 DEG C～220 DEG C, and churning time is 60min, obtains agglutinate (or claiming modifying asphalt agglutinate);
Its three norms of described agglutinate is respectively: 91 DEG C of softening temperatures, penetration degree (25 DEG C) 40, ductility (5 DEG C) 52.
2) press 1# mineral aggregate 67.9%, 2# mineral aggregate 5.2%, rubber grain 7.5%, mineral powder filling materials 5.2%, agglutinate 14.2%, choose 1# mineral aggregate, 2# mineral aggregate, rubber grain, mineral powder filling materials and agglutinate;
Wherein, the particle diameter of 1# mineral aggregate be 4.75mm～9.5mm(containing 4.75mm, the particle diameter > 4.75mm of 1# mineral aggregate and≤9.5mm), the particle diameter≤4.75mm of 2# mineral aggregate, the particle diameter≤4.75mm(of rubber grain is 0.3mm～4.75mm);
Described mineral aggregate (1# mineral aggregate, 2# mineral aggregate) adopts andesite, and its crush values is 12%, and elongated particles is 6%; Mineral powder filling materials (breeze) is limestone dust, particle diameter≤0.075mm;
Described rubber grain is to be formed through normal temperature fragmentation by the junked tire of bogie, for substituting the 2# mineral aggregate of grating part.
What described large stroke bridge floor is seamless expanded joint material adopted is gap grading, and nominal maximum particle diameter is 9.5mm, and void in mineral aggregate is 20～40%.
3) build:
1. 1# mineral aggregate and 2# mineral aggregate are heated to 280 ± 20 DEG C, pouring temperature into is 220 DEG C mixing in pot, then the rubber grain under normal temperature is poured into and mixed in pot, stirs in advance 90s;
2. the agglutinate of 200 DEG C is poured into and is mixed in pot, stir 90s;
3. finally mineral powder filling materials (or claiming breeze) is joined to mix in pot and stirs 90s, obtain the seamless expanded joint material of large stroke bridge floor, then build (directly pour in mould, leveling surface, without rolling).
According to " highway engineering pitch and Asphalt Mixture Experiment code " (JTJ E20-2011), high-temperature stability and low-temperature cracking-resistance to the seamless expanded joint material of bridge floor in embodiment are studied, respectively using high-temperature rutting test and low temperature three point bending test as the important indicator of controlling expanded joint material performance, test-results is as shown in table 4, has illustrated that the seamless expanded joint material of bridge floor that the embodiment of the present invention obtains has good high-temperature stability and superior low-temperature cracking-resistance.
The test-results of the large seamless expanded joint material of stroke bridge floor of table 4 under high temperature and low temperature
Table 4 illustrate the present invention at low temperatures (at 10 DEG C) there is larger deformability and unlikely cracking, at high temperature (at 60 DEG C) have good rutting resistance.
embodiment 7
A preparation method for the seamless expanded joint material of large stroke bridge floor, it comprises the steps:
1) prepare agglutinate:
1. by each component and mass percent thereof be: 110# bi tumenf orr oad 65.0%, rubber powder 25.0%, SBS properties-correcting agent 10.0%, chooses matrix pitch, rubber powder and SBS properties-correcting agent;
2. after first matrix pitch being heated to 140～150 DEG C of temperature, join in metal vessel, in the time that temperature is increased to 180 DEG C of design temperatures, successively rubber powder and SBS properties-correcting agent are slowly added to (described slowly adding refers to that adding speed is 0.2～0.3mL/s) in the metal vessel that fills matrix pitch, in process furnace top, heating edge stirs with low-speed mixer, and stirring velocity is controlled within the scope of 100r/min～400r/min;
3. when rubber powder starts swelling, viscosity rise, stirring at need, slow down adding speed and continuing slowly to stir (described slowly adding refers to that adding speed is 0.1～0.2mL/s) of SBS properties-correcting agent;
4. repeatedly carry out the 3. operation of step, until SBS properties-correcting agent is all added, the time that all SBS properties-correcting agent adds is approximately 10min; Again the rotating speed of low-speed mixer is raise, maintain 400r/min～750r/min, until composition is substantially even;
5. use high speed shear stirrer instead and stir, the speed of shearing rotor is 3000r/min～5000r/min, and controls asphalt temperature within the scope of 180 DEG C～220 DEG C, and churning time is 60min, obtains agglutinate (or claiming modifying asphalt agglutinate);
2) press 1# mineral aggregate 60.0%, 2# mineral aggregate 7.0%, rubber grain 8.5%, mineral powder filling materials 7.0%, agglutinate 17.5%, choose 1# mineral aggregate, 2# mineral aggregate, rubber grain, mineral powder filling materials and agglutinate;
Wherein, the particle diameter of 1# mineral aggregate be 4.75mm～9.5mm(containing 4.75mm, the particle diameter > 4.75mm of 1# mineral aggregate and≤9.5mm), the particle diameter≤4.75mm of 2# mineral aggregate, the particle diameter≤4.75mm(of rubber grain is 0.3mm～4.75mm);
Described mineral aggregate (1# mineral aggregate, 2# mineral aggregate) is basalt (1# mineral aggregate, 2# mineral aggregate are all basalt), has enough intensity (crush values≤20%), and the strict middle faller gill shape (elongated particles≤10%) that gathers materials of controlling; Mineral powder filling materials (breeze) is limestone dust, particle diameter≤0.075mm;
3) build:
1. 1# mineral aggregate and 2# mineral aggregate are heated to 280 ± 20 DEG C, pouring temperature into is 220 DEG C mixing in pot, then the rubber grain under normal temperature is poured into and mixed in pot, stirs in advance 90s;
2. the agglutinate of 200 DEG C is poured into and is mixed in pot, stir 90s;
3. finally mineral powder filling materials (or claiming breeze) is joined to mix in pot and stirs 90s, obtain the seamless expanded joint material of large stroke bridge floor, then build (directly pour in mould, leveling surface, without rolling).
According to " highway engineering pitch and Asphalt Mixture Experiment code " (JTJ E20-2011), high-temperature stability and low-temperature cracking-resistance to the seamless expanded joint material of bridge floor in embodiment are studied, respectively using high-temperature rutting test and low temperature three point bending test as the important indicator of controlling expanded joint material performance, test-results is as shown in table 5, has illustrated that the seamless expanded joint material of bridge floor that the embodiment of the present invention obtains has good high-temperature stability and superior low-temperature cracking-resistance.
embodiment 8
A preparation method for the seamless expanded joint material of large stroke bridge floor, it comprises the steps:
1) prepare agglutinate:
1. by each component and mass percent thereof be: 110# bi tumenf orr oad 75.0%, rubber powder 20.0%, SBS properties-correcting agent 5.0%, chooses matrix pitch, rubber powder and SBS properties-correcting agent;
2. after first matrix pitch being heated to 140～150 DEG C of temperature, join in metal vessel, in the time that temperature is increased to 220 DEG C of design temperatures, successively rubber powder and SBS properties-correcting agent are slowly added to (described slowly adding refers to that adding speed is 0.2～0.3mL/s) in the metal vessel that fills matrix pitch, in process furnace top, heating edge stirs with low-speed mixer, and stirring velocity is controlled within the scope of 100r/min～400r/min;
3. when rubber powder starts swelling, viscosity rise, stirring at need, slow down adding speed and continuing slowly to stir (described slowly adding refers to that adding speed is 0.1～0.2mL/s) of SBS properties-correcting agent;
4. repeatedly carry out the 3. operation of step, until SBS properties-correcting agent is all added, the time that all SBS properties-correcting agent adds is approximately 10min; Again the rotating speed of low-speed mixer is raise, maintain 400r/min～750r/min, until composition is substantially even;
5. use high speed shear stirrer instead and stir, the speed of shearing rotor is 3000r/min～5000r/min, and controls asphalt temperature within the scope of 180 DEG C～220 DEG C, and churning time is 60min, obtains agglutinate (or claiming modifying asphalt agglutinate);
2) press 1# mineral aggregate 70.0%, 2# mineral aggregate 4.0%, rubber grain 8.0%, mineral powder filling materials 4.5%, agglutinate 13.5%, choose 1# mineral aggregate, 2# mineral aggregate, rubber grain, mineral powder filling materials and agglutinate;
Wherein, the particle diameter of 1# mineral aggregate be 4.75mm～9.5mm(containing 4.75mm, the particle diameter > 4.75mm of 1# mineral aggregate and≤9.5mm), the particle diameter≤4.75mm of 2# mineral aggregate, the particle diameter≤4.75mm(of rubber grain is 0.3mm～4.75mm);
Described mineral aggregate (1# mineral aggregate, 2# mineral aggregate) is limestone (1# mineral aggregate, 2# mineral aggregate are all limestone), has enough intensity (crush values≤20%), and the strict middle faller gill shape (elongated particles≤10%) that gathers materials of controlling; Mineral powder filling materials (breeze) is limestone dust, particle diameter≤0.075mm;
Described rubber grain is to be formed through normal temperature fragmentation by the junked tire of bogie, for substituting the 2# mineral aggregate of grating part.
3) build:
1. 1# mineral aggregate and 2# mineral aggregate are heated to 280 ± 20 DEG C, pouring temperature into is 220 DEG C mixing in pot, then the rubber grain under normal temperature is poured into and mixed in pot, stirs in advance 90s;
2. the agglutinate of 200 DEG C is poured into and is mixed in pot, stir 90s;
3. finally mineral powder filling materials (or claiming breeze) is joined to mix in pot and stirs 90s, obtain the seamless expanded joint material of large stroke bridge floor, then build (directly pour in mould, leveling surface, without rolling).
According to " highway engineering pitch and Asphalt Mixture Experiment code " (JTJ E20-2011), high-temperature stability and low-temperature cracking-resistance to the seamless expanded joint material of bridge floor in embodiment are studied, respectively using high-temperature rutting test and low temperature three point bending test as the important indicator of controlling expanded joint material performance, test-results is as shown in table 5, has illustrated that the seamless expanded joint material of bridge floor that the embodiment of the present invention obtains has good high-temperature stability and superior low-temperature cracking-resistance.
embodiment 9
A preparation method for the seamless expanded joint material of large stroke bridge floor, it comprises the steps:
1) prepare agglutinate:
1. by each component and mass percent thereof be: 130# bi tumenf orr oad 70.0%, rubber powder 22.0%, SBS properties-correcting agent 8.0%, chooses matrix pitch, rubber powder and SBS properties-correcting agent;
2. after first matrix pitch being heated to 140～150 DEG C of temperature, join in metal vessel, in the time that temperature is increased to 180 DEG C of design temperatures, successively rubber powder and SBS properties-correcting agent are slowly added to (described slowly adding refers to that adding speed is 0.2～0.3mL/s) in the metal vessel that fills matrix pitch, in process furnace top, heating edge stirs with low-speed mixer, and stirring velocity is controlled within the scope of 100r/min～400r/min;
3. when rubber powder starts swelling, viscosity rise, stirring at need, slow down adding speed and continuing slowly to stir (described slowly adding refers to that adding speed is 0.1～0.2mL/s) of SBS properties-correcting agent;
4. repeatedly carry out the 3. operation of step, until SBS properties-correcting agent is all added, the time that all SBS properties-correcting agent adds is approximately 10min; Again the rotating speed of low-speed mixer is raise, maintain 400r/min～750r/min, until composition is substantially even;
5. use high speed shear stirrer instead and stir, the speed of shearing rotor is 3000r/min～5000r/min, and controls asphalt temperature within the scope of 180 DEG C～220 DEG C, and churning time is 60min, obtains agglutinate (or claiming modifying asphalt agglutinate);
2) press 1# mineral aggregate 69.0%, 2# mineral aggregate 14.0%, rubber grain 4.0%, mineral powder filling materials 4.0%, agglutinate 9.0%, choose 1# mineral aggregate, 2# mineral aggregate, rubber grain, mineral powder filling materials and agglutinate;
Wherein, the particle diameter of 1# mineral aggregate is that 4.75mm～9.5mm(is not containing 4.75mm, be 1# mineral aggregate particle diameter > 4.75mm and≤9.5mm), particle diameter≤the 4.75mm of 2# mineral aggregate, particle diameter≤the 4.75mm(of rubber grain is 0.3mm～4.75mm, and the distribution of sizes of rubber grain is in table 1);
Described mineral aggregate (1# mineral aggregate, 2# mineral aggregate) is basalt (1# mineral aggregate, 2# mineral aggregate can be all basalt), has enough intensity (crush values≤20%), and the strict middle faller gill shape (elongated particles≤10%) that gathers materials of controlling; Mineral powder filling materials (breeze) is limestone dust, particle diameter≤0.075mm;
3) build:
1. 1# mineral aggregate and 2# mineral aggregate are heated to 280 ± 20 DEG C, pouring temperature into is 220 DEG C mixing in pot, then the rubber grain under normal temperature is poured into and mixed in pot, stirs in advance 90s;
2. the agglutinate of 200 DEG C is poured into and is mixed in pot, stir 90s;
3. finally mineral powder filling materials (or claiming breeze) is joined to mix in pot and stirs 90s, obtain the seamless expanded joint material of large stroke bridge floor, then build (directly pour in mould, leveling surface, without rolling).Its correlated performance is in table 5.
According to " highway engineering pitch and Asphalt Mixture Experiment code " (JTJ E20-2011), high-temperature stability and low-temperature cracking-resistance to the seamless expanded joint material of bridge floor in embodiment are studied, respectively using high-temperature rutting test and low temperature three point bending test as the important indicator of controlling expanded joint material performance, test-results is as shown in table 5, has illustrated that the seamless expanded joint material of bridge floor that the embodiment of the present invention obtains has good high-temperature stability and superior low-temperature cracking-resistance.
The test-results of the large seamless expanded joint material of stroke bridge floor of table 5 under high temperature and low temperature
Table 5 illustrate the present invention at low temperatures (at 10 DEG C) there is larger deformability and unlikely cracking, at high temperature (at 60 DEG C) have good rutting resistance.
Each raw material that the present invention is cited, and the bound of the each raw material of the present invention, interval value, and the bound of processing parameter (as temperature, time etc.), interval value can realize the present invention, do not enumerate embodiment at this.
Claims (9)
1. the seamless expanded joint material of large stroke bridge floor, it is characterized in that, it is prepared from by 1# mineral aggregate, 2# mineral aggregate, rubber grain, mineral powder filling materials and agglutinate, and the shared mass percent of each raw material is: 1# mineral aggregate 60.0%～70.0%, 2# mineral aggregate 4.0%～14.0%, rubber grain 4.0%～8.5%, mineral powder filling materials 4.0%～7.0%, agglutinate 9.0%～17.5%;
Wherein, the particle diameter > 4.75mm of 1# mineral aggregate and≤9.5mm, the particle diameter≤4.75mm of 2# mineral aggregate, the particle diameter≤4.75mm of rubber grain;
Each component and the mass percent thereof of described agglutinate are: matrix pitch 65.0～75.0%, rubber powder 20.0%～25.0%, SBS properties-correcting agent 5.0～10.0%.
2. the seamless expanded joint material of the large stroke bridge floor of one according to claim 1, is characterized in that, described mineral aggregate is basalt, limestone or andesite.
3. the seamless expanded joint material of the large stroke bridge floor of one according to claim 1, is characterized in that, mineral powder filling materials is limestone dust, particle diameter≤0.075mm.
4. the seamless expanded joint material of the large stroke bridge floor of one according to claim 1, is characterized in that, matrix pitch is high grade bi tumenf orr oad, and penetration degree scope is 80～120, and softening temperature is not less than 41 DEG C, and 15 DEG C of ductilities are not less than 100cm.
5. the seamless expanded joint material of the large stroke bridge floor of one according to claim 1, is characterized in that, the size of rubber powder is 60 order～200 orders.
6. the seamless expanded joint material of the large stroke bridge floor of one according to claim 1, is characterized in that, SBS properties-correcting agent is star-shaped sbs properties-correcting agent.
7. the preparation method of the seamless expanded joint material of a kind of large stroke bridge floor as claimed in claim 1, is characterized in that it comprises the steps:
1) prepare agglutinate:
1. by each component and mass percent thereof be: matrix pitch 65.0～75.0%, rubber powder 20.0%～25.0%, SBS properties-correcting agent 5.0～10.0%, chooses matrix pitch, rubber powder and SBS properties-correcting agent;
2. after first matrix pitch being heated to 140～150 DEG C of temperature, join in container, in the time that temperature is increased to 180～220 DEG C of design temperatures, to successively rubber powder and SBS properties-correcting agent be added in the container that fills matrix pitch, limit heating edge stirs with low-speed mixer, and stirring velocity is controlled within the scope of 100r/min～400r/min;
3. when rubber powder starts swelling, viscosity rise, stirring at need, slow down adding speed and continue and stirring of SBS properties-correcting agent;
4. repeatedly carry out the 3. operation of step, until SBS properties-correcting agent is all added, then the rotating speed of low-speed mixer is raise, maintain 400r/min～750r/min, until composition is substantially even;
5. use high speed shear stirrer instead and stir, the speed of shearing rotor is 3000r/min～5000r/min, and controls temperature within the scope of 180 DEG C～220 DEG C, and churning time is 60min, obtains agglutinate;
2) press 1# mineral aggregate 60.0%～70.0%, 2# mineral aggregate 4.0%～14.0%, rubber grain 4.0%～8.5%, mineral powder filling materials 4.0%～7.0%, agglutinate 9.0%～17.5%, choose 1# mineral aggregate, 2# mineral aggregate, rubber grain, mineral powder filling materials and agglutinate;
Wherein, the particle diameter > 4.75mm of 1# mineral aggregate and≤9.5mm, the particle diameter≤4.75mm of 2# mineral aggregate, the particle diameter≤4.75mm of rubber grain;
3) build:
1. 1# mineral aggregate and 2# mineral aggregate are heated to 280 ± 20 DEG C, pouring temperature into is 220 DEG C mixing in pot, then the rubber grain under normal temperature is poured into and mixed in pot, stirs in advance 90s;
2. the agglutinate of 200 DEG C is poured into and is mixed in pot, stir 90s;
3. finally mineral powder filling materials is joined mix in pot and stir 90s, obtain the seamless expanded joint material of large stroke bridge floor, then build.
8. the preparation method of the seamless expanded joint material of a kind of large stroke bridge floor according to claim 7, is characterized in that, rubber grain is that junked tire forms through normal temperature fragmentation, and distribution of sizes will meet table 1 requirement,
The distribution of sizes of table 1 rubber grain
。
9. the preparation method of the seamless expanded joint material of a kind of large stroke bridge floor according to claim 7, is characterized in that, described mineral aggregate is basalt, limestone or andesite; Mineral powder filling materials is limestone dust, particle diameter≤0.075mm.
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| CN201210130811.4A CN102718438B (en) | 2012-04-30 | 2012-04-30 | Bridge floor seamless expansion joint material with large expansion amount and preparation method thereof |
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| CN104594191B (en) * | 2015-02-16 | 2016-05-25 | 西安公路研究院 | Seamless expansion-contraction devices and construction method thereof between the girder of built-in corrugated steel plate and abutment |
| CN104944843B (en) * | 2015-06-15 | 2017-08-01 | 辽宁省交通科学研究院 | A kind of high performance asphalt of steel bridge deck pavement and preparation method thereof |
| CN107064203A (en) * | 2017-04-11 | 2017-08-18 | 北京市政路桥建材集团有限公司 | A kind of asphalt pavement crack hot type base joint grouting glue selecting method |
| CN108911586A (en) * | 2018-08-07 | 2018-11-30 | 广东金长成桥梁隧道科技有限公司 | One kind being suitable for macropore slot gap-filling glue and its preparation, joint filling construction method |
| CN109534726A (en) * | 2019-01-02 | 2019-03-29 | 广州市市政工程维修处 | Flexible seamless expansion joint joint filler and preparation method thereof |
| CN110627439B (en) * | 2019-10-08 | 2020-12-22 | 武汉理工大学 | Ultra-high performance concrete for expansion joint transition area and preparation method thereof |
| CN110950579B (en) * | 2019-12-13 | 2022-04-15 | 江苏中路工程技术研究院有限公司 | Flexible splicing material and preparation method thereof |
| CN112831189B (en) * | 2021-01-05 | 2022-06-17 | 长安大学 | Asphalt high-ductility cementing material, high-ductility material and preparation method |
| CN116396014A (en) * | 2023-04-14 | 2023-07-07 | 东南大学 | Rubber powder epoxy asphalt cement for expansion joint, prefabricated structure, preparation method and application thereof |
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| CN101153478A (en) * | 2007-10-16 | 2008-04-02 | 哈尔滨工业大学 | Construction method for rubber grain asphalt concrete pavement |
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