CN103013145B - Preparation method of anti-aging and low-temperature reflection cracking resistant bitumen stress absorption layer - Google Patents
Preparation method of anti-aging and low-temperature reflection cracking resistant bitumen stress absorption layer Download PDFInfo
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- CN103013145B CN103013145B CN201210565410.1A CN201210565410A CN103013145B CN 103013145 B CN103013145 B CN 103013145B CN 201210565410 A CN201210565410 A CN 201210565410A CN 103013145 B CN103013145 B CN 103013145B
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Abstract
The invention relates to a preparation method of a bitumen stress absorption layer material for improving high-temperature construction aging and preventing low-temperature reflection cracking. The method is characterized in that the method comprises the following steps of 1) preparation of high-viscosity/tenacity bitumen, 2) preparation of high-viscosity/tenacity bitumen with low and high temperature viscosity and selection of the high-viscosity/tenacity bitumen and a high-temperature viscosity reducer for use, and 3) paving of the bitumen stress absorption layer material for improving the high-temperature construction aging and preventing the low-temperature reflection cracking, thereby obtaining the bitumen stress absorption layer material, wherein a mass ratio of matrix bitumen to modifier SBS (styrene-butadiene-styrene) to activated rubber powder to tackifying component to toughening component to stabilizing agent of the high-viscosity/tenacity bitumen is 100:(5.8-14.6):(10.2-20.6):(1.3-3.7):(1.0-3.2):(0.3-1.7); the high-viscosity/tenacity bitumen with the low and high temperature viscosity consists of the high-viscosity/tenacity bitumen and the high-temperature viscosity reducer; and a mass ratio of the high-tenacity bitumen to the high-temperature viscosity reducer is 100:(0.8-6.2). The material obtained with the method can improve the high-temperature construction aging and prevent the low-temperature reflection cracking.
Description
Technical field
The invention belongs to Materials Science and Engineering field, be specifically related to a kind ofly improve the preparation method that construction at high temperature is aging, stop the pitch absorption of stress layer material of low temperature reflection crack.
Background technology
Because bituminous pavement is attractive in appearance, it is comfortable to drive a vehicle, cement concrete pavement, bridge floor can overlay one deck bituminous concrete pavement, this kind of combined type (cement concrete+bituminous concrete) road surface, under the dual function of traffic loading repeatedly and high/low temperature load, cement concrete can reflex to asphalt concrete pavement formation reflection crack owing to shrinking the crack produced, and reflection crack has become the large Major Diseases destroying this kind of composite pavement.At present, the technical way that stress absorbing layer is this disease of prevention is overlayed.Stress absorbing layer is that one is layed between this kind of composite pavement, has the modified asphalt layer of high deformability.Because it is by the thicker horizontal shear distortion of interface asphalt membrane existence and the slip of rubble, can weaken and absorb stress or the strain of the brea bed caused in the relative displacement in seam or crack by cement concrete slab to a great extent, and then the generation of pre-Anti-reflective Crack of Overlaying, cause the extensive concern of domestic and international researchist gradually and carried out related application.
Present stage, modifying asphalt as stress absorbing layer mainly contains rubber modified asphalt, high-viscosity modified asphalt, high-viscosity high-elasticity modifying asphalt etc., there is following problem in related products: 1) high temperature viscosity is large in application process, for the ease of spraying construction, asphalt heating temperature is higher, and ageing of asphalt, performance degradation are serious, directly affects the use properties of stress absorbing layer, and spread construction is wayward, easily occurs spray nozzle clogging phenomenon, cause construction inconvenience; 2) under cold condition, asphalt elasticity restorability is more weak, when can not well stop low temperature to be on active service reflection crack prolong life, there is serious weather resistance hidden danger.
Therefore develop and a kind ofly can improve the pitch absorption of stress layer material that construction at high temperature is aging, stop low temperature reflection crack simultaneously, and determine constructional method.The low temperature use properties of pitch stress absorbing layer can not only be improved, and can construction temperature be reduced, be beneficial to and spray construction, improve the high temperature ageing of pitch, be of great practical significance.
Key measures of the present invention is on the basis of in the present inventor existing patent of invention " a kind of preparation method of waterproof bond stress absorbing bridge deck pavement material " (patent No.: ZL200910063308.X), composite toughening component and high-temperature viscosity reducer, under the condition reducing asphalt high-temperature viscosity, improve the low-temperature flexibility of pitch, make it can spray construction at a lower temperature, improve the high temperature ageing of pitch, be convenient to spray construction, also possess higher low temperature (5 DEG C) elastic recovery capability simultaneously, stop low temperature reflection crack.Its know-why is: high-temperature viscosity reducer be a kind of naphthenic hydrocarbon by C30-50 and a small amount of just, the fusing point that forms of isoparaffin is at the Microcrystalline Wax of about 100 DEG C, more than 100 DEG C, be in a liquid state and be distributed in pitch, lubrication can be played, thus reduce the high temperature viscosity of pitch, make it can construct at a lower temperature, the construction at high temperature improving pitch is aging; Then in solid-state below 100 DEG C, stop the slippage of asphaltene molecule, thus improve the viscosity of pitch, therefore high-temperature viscosity reducer can reduce the high temperature viscosity of pitch, but can not reduce the low temperature viscosity of pitch, thus avoids the use properties affecting pitch; Toughening element is the liquid ester class organic compound of the more difficult volatilization of a kind of high boiling point, its mechanism of action is that toughening element molecule is inserted between asphalt polymer molecular chain, weaken the stress between asphalt polymer molecular chain, add the movability of asphalt polymer molecular chain, reduce the degree of crystallinity of pitch and asphalt modifier polymer molecular chain, thus the toughness of pitch is increased, good toughness can make pitch have higher elastic recovery properties at low temperatures, can effectively stop low temperature reflection crack.
Summary of the invention
The object of the present invention is to provide the preparation method of pitch stress absorbing layer of a kind of anti-aging, anti-low temperature reflection crack, the material that the method obtains can improve construction at high temperature aging, stop low temperature reflection crack.
To achieve these goals, technical scheme of the present invention is: the preparation method of the pitch stress absorbing layer of a kind of anti-aging, anti-low temperature reflection crack, is characterized in that it comprises the steps:
1) preparation of high sticky toughness pitch
The mass ratio of the high sticky each component of toughness pitch is matrix pitch: properties-correcting agent SBS: activating rubber powder: adhesion promoting component: toughening element: stablizer=100:5.8 ~ 14.6:10.2 ~ 20.6:1.3 ~ 3.7:1.0 ~ 3.2:0.3 ~ 1.7, choose matrix pitch, properties-correcting agent SBS, activating rubber powder, adhesion promoting component, toughening element and stablizer, for subsequent use;
Matrix pitch is heated to 160 ~ 170 DEG C, insulation 10 ~ 20min, then adds properties-correcting agent SBS, adhesion promoting component, toughening element, stablizer successively, and stir 20 ~ 30min, control temperature 160 ~ 180 DEG C, obtains asphalt mixture A; Asphalt mixture A is passed through high-speed shearing emulsion machine (the JRJ300-S type high-speed shearing emulsion machine that Suzhou Qi Le Electronic Science and Technology Co., Ltd. produces) again, control rotating speed 4000 ~ 7000 turns/min (i.e. high speed shear), add activating rubber powder, after interpolation, continue high speed shear 90 ~ 100min, during shearing, control temperature 180 ~ 200 DEG C, obtains asphalt mixture B; Finally the asphalt mixture B after shearing is left standstill 50 ~ 80min at 150 ~ 175 DEG C, i.e. obtained high sticky toughness pitch;
Described matrix pitch selects bitumen A H-70 or bitumen A H-90;
Described adhesion promoting component selects C5/C9 copolymerized petroleum resin;
Described toughening element selects hexanodioic acid propanediol polyester;
Described stablizer selects di-isopropylbenzene hydroperoxide or sulphur class stablizer;
2) height of low high temperature viscosity glues the preparation of toughness pitch
The height of low high temperature viscosity glues toughness pitch and glues toughness pitch by height and high-temperature viscosity reducer forms, and the mass ratio of each component is high sticky toughness pitch: high-temperature viscosity reducer=100:0.8 ~ 6.2, chooses high sticky toughness pitch, high-temperature viscosity reducer, for subsequent use;
Glue in toughness pitch to the height heating (175 ~ 185 DEG C) and add high-temperature viscosity reducer, temperature controls, at 175 ~ 185 DEG C, to stir 40min ~ 60min simultaneously, and the height of obtained low high temperature viscosity glues toughness pitch;
Described high-temperature viscosity reducer selects Microcrystalline Wax (fusing point 101 DEG C);
3) improve construction at high temperature aging, stop mating formation of the pitch absorption of stress layer material of low temperature reflection crack
1. construction before reply concrete slab clean, guarantee that, without obvious dust, aggregate chips, foreign material, the equipment simultaneously needed enters armed state, prepare need equipment, need equipment comprise pitch sprinkling car, road-metal spreading machine, rubber-tyred roller;
2. the height of the low high temperature viscosity prepared is glued toughness asphalt heating to 155 ~ 165 DEG C, the height adopting pitch sprinkling car to carry out low high temperature viscosity on concrete slab glues the spread of toughness pitch, and spread quantity will be strict controlled in 1.6 ~ 2.8kg/m
3, the maximum deviation amount of spraying in actually operating should not exceed prescribed value 0.2kg/m
3;
3. after pitch sprinkling completes, carry out the spreading work of rubble immediately, rubble spreads paving amount and remains on 14 ~ 19kg/m
3, Yi Manpu, be not lost to standard, if local occurs that obvious rubble spreads the situation of paving quantity not sufficient, should manually supply in time;
4. adopt rubber-tyred roller to carry out rolling 2 ~ 5 times, in order to ensure to roll temperature, requiring that rubber-tyred roller follows closely after road-metal spreading machine and rolling, keeping at a distance and be no more than 5cm; Rolling speed wants slow and evenly, starting, stopping must being slowed down and slowly be carried out, and must not at will reverse end for end;
5. after rolling, remove the unnecessary rubble do not bondd in time, avoid affecting the adhesive property with upper strata, obtain pitch absorption of stress layer material.
Described rubble selects basalt or diabase, and nominal particle diameter is 9.5 ~ 13.2mm or 13.2mm ~ 16mm.
The invention has the beneficial effects as follows: the high temperature performance that effectively can improve bituminous material by adding properties-correcting agent SBS, adhesion promoting component and toughening element in matrix pitch, 60 DEG C of viscosity and 25 DEG C of toughness are greatly improved, 70000Pas and 25Nm can be reached, 5 DEG C of low temperature elasticities recover to reach 85% (5 DEG C of recovery of elasticity experimental techniques are shown in annex 1), and the reflection crack that can obviously improve under winter low temperature condition produces.Effectively introducing high temperature viscosity reduction technology simultaneously, by reducing the high temperature viscosity of binder, realizing reducing nearly 30 DEG C of spread temperature.Ageing of asphalt performance can be improved, play again the effect alleviating spray nozzle clogging phenomenon, and save energy to a great extent, reduce the discharge of obnoxious flavour, improve the working condition of working-yard.In addition, the present invention is not only in the ageing of asphalt phenomenon improved in construction at high temperature process and stop excellent effect in low temperature reflection crack, and waterproof, adhesive property are also very outstanding, are highly suitable for mating formation of stress absorbing layer.
Embodiment
In order to understand the present invention better, illustrate content of the present invention further 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 pitch stress absorbing layer of anti-aging, anti-low temperature reflection crack, it comprises the steps:
1) preparation of high sticky toughness pitch
The mass ratio of the high sticky each component of toughness pitch is matrix pitch: the YH-791 type SBS of properties-correcting agent SBS(Yueyang Ba Ling petrochemical iy produced): activating rubber powder (the JLY-12177 type activating rubber powder that Tianjin Benq gold safe product of rubber and plastic processing company limited produces): adhesion promoting component: toughening element: stablizer=100:5.8:10.2:1.4:1.0:0.3, choose matrix pitch, properties-correcting agent SBS, activating rubber powder, adhesion promoting component, toughening element and stablizer, for subsequent use;
Described matrix pitch selects bitumen A H-70.
Described adhesion promoting component selects C5/C9 copolymerized petroleum resin (the CY-ANH-M2090 type C5/C9 copolymerized petroleum resin that Puyang petroleum resin company limited produces).
Described toughening element selects hexanodioic acid propanediol polyester.
Sulphur class stablizer selected by described stablizer, as sulphur.
Matrix pitch is heated to 160 DEG C, insulation 10min, then adds properties-correcting agent SBS, adhesion promoting component, toughening element, stablizer successively, and stir 20min, control temperature 160 DEG C, obtains asphalt mixture A; Asphalt mixture A is passed through high-speed shearing emulsion machine (the JRJ300-S type high-speed shearing emulsion machine that Suzhou Qi Le Electronic Science and Technology Co., Ltd. produces) again, control rotating speed 4000 turns/min, add activating rubber powder, after interpolation, continue high speed shear 90min, during shearing, control temperature 180 DEG C, obtains asphalt mixture B; Finally by the asphalt mixture B after shearing at 150 DEG C of standing 50min, i.e. obtained high sticky toughness pitch.
2) height of low high temperature viscosity glues the preparation of toughness pitch
The height of low high temperature viscosity glues toughness pitch and glues toughness pitch by height and high-temperature viscosity reducer forms, and the mass ratio of each component is modifying asphalt: high-temperature viscosity reducer=100:0.8, and the height choosing preparation glues toughness pitch, high-temperature viscosity reducer, for subsequent use;
Described high-temperature viscosity reducer selects Microcrystalline Wax (fusing point 101 DEG C).
Glue in toughness pitch to the height heating (180 DEG C) and add high-temperature viscosity reducer, temperature controls, at 180 DEG C, to stir 40min simultaneously, and the height of obtained low high temperature viscosity glues toughness pitch.
3) improve construction at high temperature aging, stop mating formation of the pitch absorption of stress layer material of low temperature reflection crack
1. before construction, reply concrete slab cleans, and guarantees without obvious dust, aggregate chips, foreign material etc.The equipment simultaneously needed enters armed state, need equipment comprise pitch sprinkling car, road-metal spreading machine, rubber-tyred roller etc.
2. the height of the low high temperature viscosity prepared is glued toughness asphalt heating to 165 DEG C, the height adopting pitch sprinkling car to carry out low high temperature viscosity on concrete slab glues the spread of toughness pitch, and spread quantity will be strict controlled in 2.3kg/m
3.The maximum deviation amount of spraying in actually operating should not exceed prescribed value ± 0.2kg/m
3.
3. after pitch sprinkling completes, carry out the spreading work of rubble immediately, rubble spreads paving amount and remains on 14kg/m
3, Yi Manpu, be not lost to standard, if local occurs that obvious rubble spreads the situation of paving quantity not sufficient, should manually supply in time.
4. adopt rubber-tyred roller to carry out rolling 3 times, in order to ensure to roll temperature, requiring that rubber-tyred roller follows closely after road-metal spreading machine and rolling, keeping at a distance and be no more than 5cm.Rolling speed wants slow and evenly, starting, stopping must being slowed down and slowly be carried out, and must not at will reverse end for end.
5. after rolling, remove the unnecessary rubble do not bondd in time, avoid affecting the adhesive property with upper strata.
Described rubble selects basalt, nominal particle diameter 13.2mm ~ 16mm.
Improvement construction at high temperature prepared by the present embodiment is aging, the pitch absorption of stress layer material of prevention low temperature reflection crack, and 60 DEG C of viscosity reach 72000Pa
.s, 25 DEG C of toughness 26Nm, 25 DEG C of pull strengths reach 0.56Mpa, shearing resistance 1.08Mpa.Reduce spread temperature 25 DEG C, 5 DEG C of recovery of elasticity reach 85% simultaneously.
Embodiment 2:
A preparation method for the pitch stress absorbing layer of anti-aging, anti-low temperature reflection crack, it comprises the steps:
1) preparation of high sticky toughness pitch
The mass ratio of the high sticky each component of toughness pitch is matrix pitch: the YH-791 type SBS of properties-correcting agent SBS(Yueyang Ba Ling petrochemical iy produced): activating rubber powder (the JLY-12177 type activating rubber powder that Tianjin Benq gold safe product of rubber and plastic processing company limited produces): adhesion promoting component: toughening element: stablizer=100:14.6:20.6:3:2.8:1.5, choose matrix pitch, properties-correcting agent SBS, activating rubber powder, adhesion promoting component, toughening element and stablizer, for subsequent use;
Described matrix pitch selects bitumen A H-90.
Described adhesion promoting component selects C5/C9 copolymerized petroleum resin (the CY-ANH-M2090 type C5/C9 copolymerized petroleum resin that Puyang petroleum resin company limited produces).
Described toughening element selects hexanodioic acid propanediol polyester.
Di-isopropylbenzene hydroperoxide selected by described stablizer.
Matrix pitch is heated to 170 DEG C, insulation 20min, then adds properties-correcting agent SBS, adhesion promoting component, toughening element, stablizer successively, and stir 30min, control temperature 180 DEG C, obtains asphalt mixture A; Asphalt mixture A is passed through high-speed shearing emulsion machine (the JRJ300-S type high-speed shearing emulsion machine that Suzhou Qi Le Electronic Science and Technology Co., Ltd. produces) again, control rotating speed 7000 turns/min, add activating rubber powder, after interpolation, continue high speed shear 100min, during shearing, control temperature 200 DEG C, obtains asphalt mixture B; Finally by the asphalt mixture B after shearing at 175 DEG C of standing 75min, i.e. obtained high sticky toughness pitch.
2) height of low high temperature viscosity glues the preparation of toughness pitch
The height of low high temperature viscosity glues toughness pitch and glues toughness pitch by height and high-temperature viscosity reducer forms, and the mass ratio of each component is modifying asphalt: high-temperature viscosity reducer=100:6.2, and the height choosing preparation glues toughness pitch, high-temperature viscosity reducer, for subsequent use;
Described high-temperature viscosity reducer selects Microcrystalline Wax (fusing point 101 DEG C).
Glue in toughness pitch to the height heating (185 DEG C) and add high-temperature viscosity reducer, temperature controls, at 185 DEG C, to stir 60min simultaneously, and the height of obtained low high temperature viscosity glues toughness pitch.
3) improve construction at high temperature aging, stop mating formation of the pitch absorption of stress layer material of low temperature reflection crack
1. before construction, reply concrete slab cleans, and guarantees without obvious dust, aggregate chips, foreign material etc.The equipment simultaneously needed enters armed state, comprises pitch sprinkling car, road-metal spreading machine, rubber-tyred roller etc.
2. the height of the low high temperature viscosity prepared is glued toughness asphalt heating to 160 DEG C, the height adopting pitch sprinkling car to carry out low high temperature viscosity on concrete slab glues the spread of toughness pitch, and spread quantity will be strict controlled in 2.8kg/m
3.The maximum deviation amount of spraying in actually operating should not exceed prescribed value 0.2kg/m
3.
3. after pitch sprinkling completes, carry out the spreading work of rubble immediately, rubble spreads paving amount and remains on 19kg/m
3, Yi Manpu, be not lost to standard, if local occurs that obvious rubble spreads the situation of paving quantity not sufficient, should manually supply in time.
4. adopt rubber-tyred roller to carry out rolling 5 times, in order to ensure to roll temperature, requiring that rubber-tyred roller follows closely after road-metal spreading machine and rolling, keeping at a distance and be no more than 5cm.Rolling speed wants slow and evenly, starting, stopping must being slowed down and slowly be carried out, and must not at will reverse end for end.
5. after rolling, remove the unnecessary rubble do not bondd in time, avoid affecting the adhesive property with upper strata.
Described rubble selects basalt, nominal particle diameter 13.2mm ~ 16mm.
Improvement construction at high temperature prepared by the present embodiment is aging, the pitch absorption of stress layer material of prevention low temperature reflection crack, and 60 DEG C of viscosity reach 74000Pa
.s, 25 DEG C of toughness 27Nm, 25 DEG C of pull strengths reach 0.62Mpa, shearing resistance 1.16Mpa, reduce spread temperature 30 DEG C simultaneously.5 DEG C of recovery of elasticity reach 88%.
Embodiment 3:
A preparation method for the pitch stress absorbing layer of anti-aging, anti-low temperature reflection crack, it comprises the steps:
1) preparation of high sticky toughness pitch
The mass ratio of the high sticky each component of toughness pitch is matrix pitch: the YH-791 type SBS of properties-correcting agent SBS(Yueyang Ba Ling petrochemical iy produced): activating rubber powder (the JLY-12177 type activating rubber powder that Tianjin Benq gold safe product of rubber and plastic processing company limited produces): adhesion promoting component: toughening element: stablizer=100:10:15.4:2.1:2.2:1.4, choose matrix pitch, properties-correcting agent SBS, activating rubber powder, adhesion promoting component, toughening element and stablizer, for subsequent use;
Described matrix pitch selects bitumen A H-90.
Described adhesion promoting component selects C5/C9 copolymerized petroleum resin (the CY-ANH-M2090 type C5/C9 copolymerized petroleum resin that Puyang petroleum resin company limited produces).
Described toughening element selects hexanodioic acid propanediol polyester.
Sulphur class stablizer selected by described stablizer, as dithiocarbonic anhydride.
Matrix pitch is heated to 165 DEG C, insulation 15min, then adds properties-correcting agent SBS, adhesion promoting component, toughening element, stablizer successively, and stir 25min, control temperature 170 DEG C, obtains asphalt mixture A; Asphalt mixture A is passed through high-speed shearing emulsion machine (the JRJ300-S type high-speed shearing emulsion machine that Suzhou Qi Le Electronic Science and Technology Co., Ltd. produces) again, control rotating speed 5000 turns/min, add activating rubber powder again, after interpolation, continue high speed shear 95min, during shearing, control temperature 180 DEG C, obtains asphalt mixture B; Finally the asphalt mixture B after shearing is glued toughness pitch at 170 DEG C of standing 60min i.e. obtained height.
2) height of low high temperature viscosity glues the preparation of toughness pitch
The height of low high temperature viscosity glues toughness pitch and glues toughness pitch by height and high-temperature viscosity reducer forms, and the mass ratio of each component is modifying asphalt: high-temperature viscosity reducer=100:4.8, and the height choosing preparation glues toughness pitch, high-temperature viscosity reducer, for subsequent use;
Described high-temperature viscosity reducer selects Microcrystalline Wax (fusing point 101 DEG C).
Glue in toughness pitch to the height heating (175 DEG C) and add high-temperature viscosity reducer, temperature controls, at 175 DEG C, to stir 50min simultaneously, and the height of obtained low high temperature viscosity glues toughness pitch.
3) improve construction at high temperature aging, stop mating formation of the pitch absorption of stress layer material of low temperature reflection crack
1. before construction, reply concrete slab cleans, and guarantees without obvious dust, aggregate chips, foreign material etc.The equipment simultaneously needed enters armed state, comprises pitch sprinkling car, road-metal spreading machine, rubber-tyred roller etc.
2. the height of the low high temperature viscosity prepared is glued toughness asphalt heating to 155 DEG C, the height adopting pitch sprinkling car to carry out low high temperature viscosity on concrete slab glues the spread of toughness pitch, and spread quantity will be strict controlled in 2.5kg/m
3.The maximum deviation amount of spraying in actually operating should not exceed prescribed value 0.2kg/m
3.
3. after pitch sprinkling completes, carry out the spreading work of rubble immediately, rubble spreads paving amount and remains on 16.3kg/m
3, Yi Manpu, be not lost to standard, if local occurs that obvious rubble spreads the situation of paving quantity not sufficient, should manually supply in time.
4. adopt rubber-tyred roller to carry out rolling 4 times, in order to ensure to roll temperature, requiring that rubber-tyred roller follows closely after road-metal spreading machine and rolling, keeping at a distance and be no more than 5cm.Rolling speed wants slow and evenly, starting, stopping must being slowed down and slowly be carried out, and must not at will reverse end for end.
5. after rolling, remove the unnecessary rubble do not bondd in time, avoid affecting the adhesive property with upper strata.
Described rubble selects diabase, nominal maximum aggregate size 13.2mm ~ 16mm.
Improvement construction at high temperature prepared by the present embodiment is aging, the pitch absorption of stress layer material of prevention low temperature reflection crack, and 60 DEG C of viscosity reach 74500Pa
.s, 25 DEG C of toughness 27Nm, 25 DEG C of pull strengths reach 0.65Mpa, shearing resistance 1.21Mpa, reduce spread temperature 35 DEG C simultaneously.5 DEG C of recovery of elasticity reach 89%.
Embodiment 4:
A preparation method for the pitch stress absorbing layer of anti-aging, anti-low temperature reflection crack, it comprises the steps:
1) preparation of high sticky toughness pitch
The mass ratio of the high sticky each component of toughness pitch is matrix pitch: the YH-791 type SBS of properties-correcting agent SBS(Yueyang Ba Ling petrochemical iy produced): activating rubber powder (the JLY-12177 type activating rubber powder that Tianjin Benq gold safe product of rubber and plastic processing company limited produces): adhesion promoting component: toughening element: stablizer=100:6: 20.2:3:2.3:1.1.Choose matrix pitch, properties-correcting agent SBS, activating rubber powder, adhesion promoting component, toughening element and stablizer, for subsequent use;
Described matrix pitch selects bitumen A H-70
Described adhesion promoting component selects C5/C9 copolymerized petroleum resin (the CY-ANH-M2090 type C5/C9 copolymerized petroleum resin that Puyang petroleum resin company limited produces).
Described toughening element selects hexanodioic acid propanediol polyester.
Sulphur class stablizer selected by described stablizer, as dithiocarbonic anhydride.
Matrix pitch is heated to 170 DEG C, insulation 20min, then adds properties-correcting agent SBS, adhesion promoting component, toughening element, stablizer successively, and stir 25min, control temperature 175 DEG C, obtains asphalt mixture A; Asphalt mixture A is passed through high-speed shearing emulsion machine (the JRJ300-S type high-speed shearing emulsion machine that Suzhou Qi Le Electronic Science and Technology Co., Ltd. produces) again, control rotating speed 6000 turns/min, add activating rubber powder again, after interpolation, continue high speed shear 90min, during shearing, control temperature 190 DEG C, obtains asphalt mixture B; Finally the asphalt mixture B after shearing is glued toughness pitch at 175 DEG C of standing 80min i.e. obtained height.
2) height of low high temperature viscosity glues the preparation of toughness pitch
The height of low high temperature viscosity glues toughness pitch and glues toughness pitch by height and high-temperature viscosity reducer forms, and the mass ratio of each component is modifying asphalt: high-temperature viscosity reducer=100:6, and the height choosing preparation glues toughness pitch, high-temperature viscosity reducer, for subsequent use;
Described high-temperature viscosity reducer selects Microcrystalline Wax (fusing point 101 DEG C).
Glue in toughness pitch to the height heating (175 DEG C) and add high-temperature viscosity reducer, temperature controls, at 175 DEG C, to stir 60min simultaneously, and the height of obtained low high temperature viscosity glues toughness pitch.
3) improve construction at high temperature aging, stop mating formation of the pitch absorption of stress layer material of low temperature reflection crack
1. before construction, reply concrete slab cleans, and guarantees without obvious dust, aggregate chips, foreign material etc.The equipment simultaneously needed enters armed state, comprises pitch sprinkling car, road-metal spreading machine, rubber-tyred roller etc.
2. the height of the low high temperature viscosity prepared is glued toughness asphalt heating to 155 DEG C, the height adopting pitch sprinkling car to carry out low high temperature viscosity on concrete slab glues the spread of toughness pitch, and spread quantity will be strict controlled in 2.5 kg/m
3.The maximum deviation amount of spraying in actually operating should not exceed prescribed value 0.2kg/m
3.
3. after pitch sprinkling completes, carry out the spreading work of rubble immediately, rubble spreads paving amount and remains on 17kg/m
3, Yi Manpu, be not lost to standard, if local occurs that obvious rubble spreads the situation of paving quantity not sufficient, should manually supply in time.
4. adopt rubber-tyred roller to carry out rolling 3 times, in order to ensure to roll temperature, requiring that rubber-tyred roller follows closely after road-metal spreading machine and rolling, keeping at a distance and be no more than 5cm.Rolling speed wants slow and evenly, starting, stopping must being slowed down and slowly be carried out, and must not at will reverse end for end.
5. after rolling, remove the unnecessary rubble do not bondd in time, avoid affecting the adhesive property with upper strata.
Described rubble selects basalt, and nominal particle diameter is 9.5 ~ 13.2mm.
Improvement construction at high temperature prepared by the present embodiment is aging, the pitch absorption of stress layer material of prevention low temperature reflection crack, and 60 DEG C of viscosity reach 78000Pa
.s, 25 DEG C of toughness 28Nm, 25 DEG C of pull strengths reach 0.7Mpa, shearing resistance 1.27Mpa, and reduction is mixed and stirred, spread temperature 35 DEG C.5 DEG C of recovery of elasticity reach 87%.Illustrate the present embodiment improve construction at high temperature aging, stop low temperature reflection crack.
embodiment 5
Substantially the same manner as Example 1, difference is in step 1),
The mass ratio of the high sticky each component of toughness pitch is matrix pitch: properties-correcting agent SBS: activating rubber powder: adhesion promoting component: toughening element: stablizer=100:5.8:10.2:1.3:1.0:0.3, choose matrix pitch, properties-correcting agent SBS, activating rubber powder, adhesion promoting component, toughening element and stablizer, for subsequent use.
Improvement construction at high temperature prepared by the present embodiment is aging, the pitch absorption of stress layer material of prevention low temperature reflection crack, and 60 DEG C of viscosity reach 80000Pa
.s, 25 DEG C of toughness 28Nm, 25 DEG C of pull strengths reach 0.8Mpa, shearing resistance 1.30Mpa, and reduction is mixed and stirred, spread temperature 30 DEG C.5 DEG C of recovery of elasticity reach 92%.Illustrate the present embodiment improve construction at high temperature aging, stop low temperature reflection crack.
embodiment 6
Substantially the same manner as Example 1, difference is in step 1),
The mass ratio of the high sticky each component of toughness pitch is matrix pitch: properties-correcting agent SBS: activating rubber powder: adhesion promoting component: toughening element: stablizer=100:14.6:20.6:3.7:3.2:1.7, choose matrix pitch, properties-correcting agent SBS, activating rubber powder, adhesion promoting component, toughening element and stablizer, for subsequent use.
Improvement construction at high temperature prepared by the present embodiment is aging, the pitch absorption of stress layer material of prevention low temperature reflection crack, and 60 DEG C of viscosity reach 79000Pa
.s, 25 DEG C of toughness 29Nm, 25 DEG C of pull strengths reach 0.7Mpa, shearing resistance 1.25Mpa, and reduction is mixed and stirred, spread temperature 30 DEG C.5 DEG C of recovery of elasticity reach 92%.Illustrate the present embodiment improve construction at high temperature aging, stop low temperature reflection crack.
embodiment 7
Substantially the same manner as Example 1, difference is in step 3), and the height adopting pitch sprinkling car to carry out low high temperature viscosity on concrete slab glues the spread of toughness pitch, and spread quantity will be strict controlled in 1.6kg/m
3.Rubber-tyred roller is adopted to carry out rolling 2 times.
Improvement construction at high temperature prepared by the present embodiment is aging, the pitch absorption of stress layer material of prevention low temperature reflection crack, and 60 DEG C of viscosity reach 78000Pa
.s, 25 DEG C of toughness 28Nm, 25 DEG C of pull strengths reach 0.7Mpa, shearing resistance 1.20Mpa, and reduction is mixed and stirred, spread temperature 30 DEG C.5 DEG C of recovery of elasticity reach 90%.Illustrate the present embodiment improve construction at high temperature aging, stop low temperature reflection crack.
annex 1
The mensuration that 5 DEG C of low temperature elasticities recover
Adopt low temperature even numbers to show bitumen ductility instrument, control temperature is 5 ± 0.5 DEG C, and tensile elongation is 40cm, and tension test adopts standard-sized recovery of elasticity copper mold.
Other operating process are with reference to the measuring method for modifying asphalt recovery of elasticity in JTJ052-2000 " highway engineering Asphalt Mixture Experiment code ".
Each concrete raw material cited by the present invention and the bound of each raw material, interval value, and the bound of each parameter of technique, interval value, can realize the present invention, not enumerate embodiment at this.
Claims (4)
1. a preparation method for the pitch stress absorbing layer of anti-aging, anti-low temperature reflection crack, is characterized in that it comprises the steps:
1) preparation of high sticky toughness pitch
The mass ratio of the high sticky each component of toughness pitch is matrix pitch: properties-correcting agent SBS: activating rubber powder: adhesion promoting component: toughening element: stablizer=100:5.8 ~ 14.6:10.2 ~ 20.6:1.3 ~ 3.7:1.0 ~ 3.2:0.3 ~ 1.7, choose matrix pitch, properties-correcting agent SBS, activating rubber powder, adhesion promoting component, toughening element and stablizer, for subsequent use;
Di-isopropylbenzene hydroperoxide selected by described stablizer;
Matrix pitch is heated to 160 ~ 170 DEG C, insulation 10 ~ 20min, then adds properties-correcting agent SBS, adhesion promoting component, toughening element, stablizer successively, and stir 20 ~ 30min, control temperature 160 ~ 180 DEG C, obtains asphalt mixture A; Again asphalt mixture A is controlled rotating speed 4000 ~ 7000 turns/min by high-speed shearing emulsion machine, add activating rubber powder, after interpolation, continue high speed shear 90 ~ 100min, during shearing, control temperature 180 ~ 200 DEG C, obtains asphalt mixture B; Finally the asphalt mixture B after shearing is left standstill 50 ~ 80min at 150 ~ 175 DEG C, i.e. obtained high sticky toughness pitch;
2) height of low high temperature viscosity glues the preparation of toughness pitch
The height of low high temperature viscosity glues toughness pitch and glues toughness pitch by height and high-temperature viscosity reducer forms, and the mass ratio of each component is high sticky toughness pitch: high-temperature viscosity reducer=100:0.8 ~ 6.2, chooses high sticky toughness pitch, high-temperature viscosity reducer, for subsequent use;
Glue in toughness pitch to the height heated and add high-temperature viscosity reducer, temperature controls, at 175 ~ 185 DEG C, to stir 40min ~ 60min simultaneously, and the height of obtained low high temperature viscosity glues toughness pitch;
Described high-temperature viscosity reducer selects Microcrystalline Wax, fusing point 101 DEG C;
3) improve construction at high temperature aging, stop mating formation of the pitch absorption of stress layer material of low temperature reflection crack
1. construction before reply concrete slab clean, prepare need equipment, need equipment comprise pitch sprinkling car, road-metal spreading machine, rubber-tyred roller;
2. the height of the low high temperature viscosity prepared is glued toughness asphalt heating to 155 ~ 165 DEG C, the height adopting pitch sprinkling car to carry out low high temperature viscosity on concrete slab glues the spread of toughness pitch, and spread quantity will be strict controlled in 1.6 ~ 2.8kg/m
3;
3. after pitch sprinkling completes, carry out the spreading work of rubble immediately, rubble spreads paving amount and remains on 14 ~ 19kg/m
3, Yi Manpu, be not lost to standard, if local occurs that obvious rubble spreads the situation of paving quantity not sufficient, should manually supply in time;
4. rubber-tyred roller is adopted to carry out rolling 2 ~ 5 times;
5., after rolling, remove the unnecessary rubble do not bondd in time, obtain pitch absorption of stress layer material.
2. the preparation method of the pitch stress absorbing layer of a kind of anti-aging according to claim 1, anti-low temperature reflection crack, is characterized in that, in step 1), described matrix pitch selects bitumen A H-70 or bitumen A H-90.
3. the preparation method of the pitch stress absorbing layer of a kind of anti-aging according to claim 1, anti-low temperature reflection crack, is characterized in that, in step 1), described adhesion promoting component selects C5/C9 copolymerized petroleum resin.
4. the preparation method of the pitch stress absorbing layer of a kind of anti-aging according to claim 1, anti-low temperature reflection crack, is characterized in that, in step 1), described toughening element selects hexanodioic acid propanediol polyester.
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| CN103849153B (en) * | 2014-03-19 | 2016-06-08 | 中石油江苏燃料沥青有限责任公司 | The preparation method of high-viscosity high-elasticity asphalt and high-viscosity high-elasticity asphalt |
| CN104725883B (en) * | 2015-04-20 | 2017-10-24 | 武汉理工大学 | A kind of high-viscosity high-elasticity asphalt being modified based on rubber particle surface, SMA asphalts and preparation method thereof |
| CN105542494A (en) * | 2015-12-30 | 2016-05-04 | 上海浦东路桥沥青材料有限公司 | Colored emulsified asphalt |
| CN105694806A (en) * | 2016-02-24 | 2016-06-22 | 栾海 | Bridge-deck waterproof bonding layer material and preparation method thereof |
| CN105907109B (en) * | 2016-04-28 | 2018-07-06 | 安徽省交通规划设计研究总院股份有限公司 | A kind of preparation method of high-strength anti-splitting paster |
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| CN110042718A (en) * | 2019-05-14 | 2019-07-23 | 江苏阜光工程新技术有限公司 | A kind of anti-shearing machine spreading super-thin pavement technique of colour |
| CN111021194A (en) * | 2019-12-13 | 2020-04-17 | 上海浦兴路桥建设工程有限公司 | Drainage asphalt pavement pre-curing material and construction process thereof |
| CN112662192B (en) * | 2020-12-16 | 2023-08-01 | 中航路通实业有限公司 | Preparation process of regenerated asphalt pavement material |
| CN114477857B (en) * | 2022-03-31 | 2023-03-03 | 沈阳建筑大学 | Bridge deck stress absorption layer material with high elastic recovery rate and preparation method thereof |
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