CN101629405B - Waterproof bond stress absorbing bridge deck pavement material preparation method - Google Patents
Waterproof bond stress absorbing bridge deck pavement material preparation method Download PDFInfo
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- CN101629405B CN101629405B CN200910063308XA CN200910063308A CN101629405B CN 101629405 B CN101629405 B CN 101629405B CN 200910063308X A CN200910063308X A CN 200910063308XA CN 200910063308 A CN200910063308 A CN 200910063308A CN 101629405 B CN101629405 B CN 101629405B
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Abstract
The invention relates to a waterproof bond stress absorbing bridge deck pavement material preparation method, belonging to the bridge deck pavement material technical field and the preparation method is characterized by comprising the following steps: 1) preparation of high viscosity and high flexible modified asphalt: (1) preparing high viscosity modified asphalt by using matrix asphalt, modifier SBS, tackifier, compatibilizer and stabilizer in a weight ratio of 100:(5.2-15.3):(1.0-3.6):(5.0-18.7):(0.2-1.4); (2) adding active rubber powder in the high viscosity modified asphalt to obtain high viscosity and high flexible modified asphalt; 2) preparation of waterproof bond stress absorbing bridge deck pavement material: preparing waterproof bond stress absorbing macadam mixture by using coarse aggregate and high viscosity and high flexible modified asphalt in a weight ratio of 100:(8.0-20.5); 3) pavement of waterproof bond stress absorbing bridge deck pavement material. The invention has functions of waterproofing, bonding and stress absorbing.
Description
Technical field
The invention belongs to the bridge deck pavement material technical field, be specifically related to a kind of preparation method of waterproof bond stress absorbing bridge deck pavement material.
Background technology
Along with the fast development of highway in China traffic, the construction of Longspan Bridge, the particularly large-scale Jiang Haiqiaoliang of striding has obtained developing rapidly.Steel box girder bridge face is because its speed of application is fast, obtained application widely from advantages such as heavy and lights.Yet steel box girder bridge floor paving is a global problem, and bituminous mixture at high temperature is difficult to and steel plate bonding and cooperative transformation, so cause deck paving passing, gather around destruction such as bag.
Therefore, Longspan Bridge adopts steel--concrete combination beam structure, avoids this global problem of paving steel bridge deck.Yet the composite beam bridge panel is to be spliced by the precast prestressed concrete plate, and this just causes the compound beam bridge floor to mat formation to have a following difficult problem: the 1) waterproof of bridge deck.Asphalt surface course is permeable, moisture infiltrates inside, road surface and reaches concrete slab, not only can cause the destruction of bridge deck pavement and asphalt mixture surfacing in the unsticking of bridge deck concrete, also can cause the problems such as corrosion of steel bar of bridge deck prestressed concrete, influence the durability of whole bridge construction; 2) high-adhesion energy.Precast prestressed concrete plate and upper strata flexible pavement caking property are relatively poor, and under hot conditions, flexible pavement very easily produces under the wheel load effect and gathers around diseases such as bag, passing, and the upper strata flexible pavement is destroyed.3) prevent the generation of reflection crack.Concrete slab and the inconsistent cracking that causes panel of joint concrete distortion.For reducing the bridge deadweight, deck paving generally is no more than 10cm, and this is easy to expand to the road table with regard to making the reflection crack that is caused by the concrete slab seam, and moisture infiltrates bridge floor along the crack, further aggravates the destruction of deck paving, and influences the durability of bridge deck.Therefore, research and development are fit to collection waterproof, bonding and stress absorption that the compound beam bridge floor mats formation and act on the pavement material of one and be optimized significant to its paving structure.
At above problem, with the strata of former U.S. Ke Shi Materials Co., Ltd is that the stress absorbing layer bituminous mixture of representative adopts the particulate formula bituminous mixture with higher viscoelastic modified bitumen preparation to have good stress absorption and waterproof action, but because the bitumen content height of stress absorbing layer bituminous mixture, grating is thin, causes the ability of its opposing high temperature deformation relatively poor.
Summary of the invention
The object of the present invention is to provide a kind of preparation method with waterproof bond stress absorbing bridge deck pavement material of waterproof, bonding, stress absorption function.
To achieve these goals, technical scheme of the present invention is: a kind of preparation method of waterproof bond stress absorbing bridge deck pavement material is characterized in that it comprises the steps:
1) preparation of high viscosity high elasticity modified bitumen:
1. the mass ratio by each component is a matrix pitch: modifier SBS: tackifier: bulking agent: stabilizing agent=100: (5.2～15.3): (1.0～3.6): (5.0～18.7): (0.2～1.4), choose matrix pitch, modifier SBS, tackifier, bulking agent and stabilizing agent, standby;
At first matrix pitch and the modifier SBS with fusing puts into mixer stirring 30～60min, and temperature is controlled at 150～170 ℃, obtains asphalt mixture; Again asphalt mixture is added in the colloid mill and mill, through once adding tackifier and bulking agent after the circulation, 3～6 circulations continue to mill, 160～170 ℃ of temperature controls, asphalt mixture after will milling again passes through high-speed shearing machine, adjust rotating speed 3000～7000 commentaries on classics/min, add stabilizing agent, after treating all to add, continue high speed shear 15～30min, the control temperature is 150～180 ℃ during shearing, and the asphalt mixture after shearing after abundant swelling under 145～175 ℃, is obtained high-viscosity modified asphalt;
2. in high-viscosity modified asphalt, add the active rubber powder, the mass ratio of high-viscosity modified asphalt and active rubber powder is 100: (5.0～20.3), high-viscosity modified asphalt is heated to 165～185 ℃, divide 2～4 addings with the active rubber powder, after each the adding asphalt mixture is passed through high-speed shearing machine, adjusting rotating speed is 4000～6000 commentaries on classics/min, stirs 4～8min, leave standstill 15～30min at 140～180 ℃ after stirring finishes, obtain the high viscosity high elasticity modified bitumen;
2) preparation of waterproof bond stress absorbing bridge deck pavement material:
Mass ratio by each component is a coarse aggregate: high viscosity high elasticity modified bitumen=100: (8.0～20.5), choose high viscosity high elasticity modified bitumen and coarse aggregate, standby;
Adopt the batch (-type) mixing apparatus, spray into the high viscosity high elasticity modified bitumen and mix and stir 15～30s when adding coarse aggregate, mix and stir 170～185 ℃ of temperature, drop temperature is not less than 160 ℃, obtains waterproof bond stress and absorbs macadam-aggregate mix;
3) mating formation of waterproof bond stress absorbing bridge deck pavement material:
1. the precast prestressed concrete plate is carried out purified treatment, the applying high voltage hydraulic giant washes does not have obvious soil block on concrete slab, till the foreign matters such as stone;
2. the high viscosity high elasticity modified bitumen is heated to 160～180 ℃, adopts pitch to spread the shop car and carry out high viscosity high elasticity modified bitumen spreading on the precast prestressed concrete plate, it is 1.8～2.4kg/m that the high viscosity high elasticity modified bitumen spills the shop amount
2Form the high viscosity high elasticity modified asphalt layer;
3. utilize paver in the high viscosity high elasticity modified bitumen spreads the 5～30s that spreads after finishing, to carry out the work that paves that waterproof bond stress absorbs macadam-aggregate mix; The temperature that waterproof bond stress absorbs macadam-aggregate mix when paving should remain on 140～180 ℃, waterproof bond stress absorb macadam-aggregate mix to spill the shop amount be 12～18kg/m
2Form waterproof bond stress and absorb the macadam-aggregate mix layer;
4. adopt steel roller to roll 3～5 times, making waterproof bond stress absorbing bridge deck pavement material (is high viscosity high elasticity stress absorbing layer 2, absorbing macadam-aggregate mix by high viscosity high elasticity modified bitumen and waterproof bond stress forms, high viscosity high elasticity modified bitumen and waterproof bond stress absorb the mutual embedding agent of macadam-aggregate mix, be pitch parcel pitch form, concrete schematic diagram is seen Fig. 1).
Described matrix pitch is selected bitumen A H-70 or bitumen A H-90 for use.
Described modifier SBS is a styrene butadiene styrene block copolymer (SBS), selects the star-like styrene butadiene styrene block copolymer (SBS) or the styrene butadiene styrene block copolymer (SBS) of line style for use.
Described tackifier are selected Petropols or terpene resin for use.
Described bulking agent is selected dihydrofuran, pentaerythrite or pentaerythritol ester bulking agent for use.
Described stabilizing agent is selected polyamide-based stabilizing agent or sulphur class stabilizing agent for use; Polyamide-based stabilizing agent is polyamide 6 or polyamide 66; Sulphur class stabilizing agent is sulphur or carbon disulfide.
Described coarse aggregate is selected basalt or diabase for use, and nominal particle diameter is 9.5～13.2mm or 13.2～16mm.
The invention has the beneficial effects as follows:
1, waterproof bond stress absorbing bridge deck pavement material of the present invention adopts hot shop high viscosity high elasticity modified bitumen to add that waterproof bond stress absorbs macadam-aggregate mix, efficiently solves the stress that the splicing of precast prestressed concrete plate is caused in the composite beam bridge panel and concentrates technical problems such as reaching the waterproof effect difference.Simultaneously because a large amount of modifier SBS, the adding of tackifier and bulking agent, 60 ℃ of viscosity of pitch can reach 80000Pas, and the high viscosity high elasticity modified bitumen is the indispensable material of preparation waterproof bond stress absorbing bridge deck pavement material.By using the high viscosity high elasticity modified bitumen, the adhesion stress of precast prestressed concrete plate and upper strata flexible pavement also strengthens greatly, effectively prevents to pass between hot conditions flexible pavement and concrete slab, gather around the generation of phenomenons such as bag.
2, the waterproof bond stress absorbing bridge deck pavement material of the present invention's preparation can improve the upper strata flexible pavement fatigue failure life-span more than 50 times, the unit water percolating capacity is no more than 0.5mL/min, 25 ℃ are pulled out and draw intensity can reach more than the 0.60MPa, and shear strength can reach more than the 1.20MPa.Upper strata flexible pavement dynamic stability is influenced below 2%.Not only has the stress absorption effect than other stress-absorbed materials, and it is good to have water resistance, adhesive property good (promptly having waterproof, bonding, stress absorption function) to overlaying the little effect of asphalt pavement structure influence, uses when being highly suitable for the deck paving of steel-concrete structure.
Description of drawings
Fig. 1 is the combination paving structural representation of waterproof bond stress absorbing bridge deck pavement material.
Among the figure: 1-precast prestressed concrete plate (or claiming layer of concrete), 2-high viscosity high elasticity stress absorbing layer (constituting), surface layer asphalt pavement material among the 3-, 4-upper strata blacktop by waterproof bond stress absorbing bridge deck pavement material.
The specific embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
Embodiment 1:
A kind of preparation method of waterproof bond stress absorbing bridge deck pavement material, it comprises the steps:
1) preparation of high viscosity high elasticity modified bitumen:
1. the mass ratio by each component is a matrix pitch: modifier SBS: tackifier: bulking agent: stabilizing agent=100: 6.0: 1.0: 5.0: 0.3, choose matrix pitch, modifier SBS, tackifier, bulking agent and stabilizing agent, and standby;
Described matrix pitch is selected bitumen A H-70 for use;
Described modifier SBS is the styrene butadiene styrene block copolymer (SBS) of line style;
Described tackifier are selected Petropols for use;
Described bulking agent is selected pentaerythritol ester for use;
Described stabilizing agent is selected sulphur class stabilizing agent for use; As sulphur;
At first matrix pitch and the modifier SBS with fusing puts into mixer stirring 60min, and temperature is controlled at 150 ℃, obtains asphalt mixture; Again asphalt mixture is added in the colloid mill and mill, through once adding tackifier and bulking agent after the circulation, continue to mill and circulate for 3 times, 160 ℃ of temperature controls, asphalt mixture after will milling again passes through high-speed shearing machine, adjust rotating speed 3000 commentaries on classics/min, add stabilizing agent, after treating all to add, continue high speed shear 15min, the control temperature is 150 ℃ during shearing, and the asphalt mixture after shearing after abundant swelling under 145 ℃, is promptly made high-viscosity modified asphalt;
2. in high-viscosity modified asphalt, add the active rubber powder, the mass ratio of high-viscosity modified asphalt and active rubber powder is 100: 5.0, high-viscosity modified asphalt is heated to 165 ℃, divide 2 addings with the active rubber powder, after each the adding asphalt mixture is passed through high-speed shearing machine, adjusting rotating speed is 4000 commentaries on classics/min, stirs 4min, leave standstill 15min at 140 ℃ after stirring finishes, promptly get the high viscosity high elasticity modified bitumen;
2) preparation of waterproof bond stress absorbing bridge deck pavement material:
Mass ratio by each component is a coarse aggregate: high viscosity high elasticity modified bitumen=100: 8.0, choose high viscosity high elasticity modified bitumen and coarse aggregate, and standby;
Described coarse aggregate is selected basalt for use, and nominal particle diameter is 9.5～13.2mm;
Adopt the batch (-type) mixing apparatus, spray into the high viscosity high elasticity modified bitumen and mix and stir 15s when adding coarse aggregate, mix and stir 170 ℃ of temperature, drop temperature is 160 ℃, obtains waterproof bond stress and absorbs macadam-aggregate mix;
3) mating formation of waterproof bond stress absorbing bridge deck pavement material: as shown in Figure 1,
1. precast prestressed concrete plate (as: C50 concrete) 1 is carried out purified treatment, the applying high voltage hydraulic giant washes does not have obvious soil block on concrete slab, till the foreign matters such as stone;
2. the high viscosity high elasticity modified bitumen is heated to 160 ℃, adopts pitch to spread the shop car and carry out high viscosity high elasticity modified bitumen spreading on the precast prestressed concrete plate, the high viscosity high elasticity modified bitumen spills the shop amount and is 1.8kg/m
2Form high viscosity high elasticity modified asphalt layer 2;
3. utilize paver in the high viscosity high elasticity modified bitumen spreads the 30s that spreads after finishing, to carry out the work that paves that waterproof bond stress absorbs macadam-aggregate mix; The temperature of waterproof bond stress absorption macadam-aggregate mix should remain on 140 ℃ when paving, and the shop amount of spilling that waterproof bond stress absorbs macadam-aggregate mix is 12kg/m
2Form waterproof bond stress and absorb macadam-aggregate mix layer 3;
4. adopt steel roller to roll 3 times, make waterproof bond stress absorbing bridge deck pavement material (promptly form high viscosity high elasticity stress absorbing layer 2, absorb macadam-aggregate mix by high viscosity high elasticity modified bitumen and waterproof bond stress and form).
Surface layer asphalt pavement material on waterproof bond stress absorbing bridge deck pavement material, paving again (as: modified bitumen AC-13 ground surface material) 3, on middle surface layer asphalt pavement material 3, pave again blacktop (be the upper strata flexible pavement, as: modified asphalt SMA-13 ground surface material) 4.
60 ℃ of viscosity of high-viscosity modified asphalt of preparation reach 72000Pas.Upper strata flexible pavement fatigue failure number of times is 23050 times, and the unit water percolating capacity is 0.1ml/min, and 25 ℃ are pulled out and draw intensity to reach 0.62MPa, and shear strength reaches 1.27MPa.(above content is waterproof, the bonding of waterproof bond stress absorbing bridge deck pavement material, the performance indications of stress absorption).
The waterproof bond stress absorbing bridge deck pavement material of present embodiment preparation can improve upper strata flexible pavement (blacktop 4) the fatigue failure life-span more than 50 times, the unit water percolating capacity is no more than 0.5mL/min, 25 ℃ are pulled out and draw intensity can reach more than the 0.60MPa, and shear strength can reach more than the 1.20MPa.Upper strata flexible pavement dynamic stability is influenced below 2%.
Embodiment 2:
A kind of preparation method of waterproof bond stress absorbing bridge deck pavement material, it comprises the steps:
1) preparation of high viscosity high elasticity modified bitumen:
1. the mass ratio by each component is a matrix pitch: modifier SBS: tackifier: bulking agent: stabilizing agent=100: 8.0: 2.0: 10.0: 0.5, choose matrix pitch, modifier SBS, tackifier, bulking agent and stabilizing agent, and standby;
Described matrix pitch is selected bitumen A H-70 for use;
Described modifier SBS is a styrene butadiene styrene block copolymer (SBS), selects star-like styrene butadiene styrene block copolymer (SBS) for use;
Described tackifier are selected terpene resin for use;
Described bulking agent is selected dihydrofuran for use;
Described stabilizing agent is selected sulphur class stabilizing agent for use; As carbon disulfide;
At first matrix pitch and the modifier SBS with fusing puts into mixer stirring 45min, and temperature is controlled at 160 ℃, obtains asphalt mixture; Again asphalt mixture is added in the colloid mill and mill, through once adding tackifier and bulking agent after the circulation, continue to mill and circulate for 5 times, 160 ℃ of temperature controls, asphalt mixture after will milling again passes through high-speed shearing machine, adjust rotating speed 5000 commentaries on classics/min, add stabilizing agent, after treating all to add, continue high speed shear 30min, the control temperature is 160 ℃ during shearing, and the asphalt mixture after shearing after abundant swelling under 160 ℃, is promptly made high-viscosity modified asphalt;
2. in high-viscosity modified asphalt, add the active rubber powder, the mass ratio of high-viscosity modified asphalt and active rubber powder is 100: 10.0, high-viscosity modified asphalt is heated to 170 ℃, divide 3 addings with the active rubber powder, after each the adding asphalt mixture is passed through high-speed shearing machine, adjusting rotating speed is 5000 commentaries on classics/min, stirs 6min, leave standstill 20min at 160 ℃ after stirring finishes, promptly get the high viscosity high elasticity modified bitumen;
2) preparation of waterproof bond stress absorbing bridge deck pavement material:
Mass ratio by each component is a coarse aggregate: high viscosity high elasticity modified bitumen=100: 12.0, choose high viscosity high elasticity modified bitumen and coarse aggregate, and standby;
Described coarse aggregate is selected diabase for use, and nominal particle diameter is 13.2～16mm;
Adopt the batch (-type) mixing apparatus, spray into the high viscosity high elasticity modified bitumen and mix and stir 20s when adding coarse aggregate, mix and stir 175 ℃ of temperature, drop temperature is 165 ℃, obtains waterproof bond stress and absorbs macadam-aggregate mix;
3) mating formation of waterproof bond stress absorbing bridge deck pavement material:
1. precast prestressed concrete plate (as: C50 concrete) is carried out purified treatment, the applying high voltage hydraulic giant washes does not have obvious soil block on concrete slab, till the foreign matters such as stone;
2. the high viscosity high elasticity modified bitumen is heated to 170 ℃, adopts pitch to spread the shop car and carry out high viscosity high elasticity modified bitumen spreading on the precast prestressed concrete plate, the high viscosity high elasticity modified bitumen spills the shop amount and is 2.0kg/m
2Form the high viscosity high elasticity modified asphalt layer;
3. utilize paver in the high viscosity high elasticity modified bitumen spreads the 15s that spreads after finishing, to carry out the work that paves that waterproof bond stress absorbs macadam-aggregate mix; The temperature of waterproof bond stress absorption macadam-aggregate mix should remain on 160 ℃ when paving, and the shop amount of spilling that waterproof bond stress absorbs macadam-aggregate mix is 15kg/m
2Form waterproof bond stress and absorb the macadam-aggregate mix layer;
4. adopt steel roller to roll 4 times, make waterproof bond stress absorbing bridge deck pavement material (promptly form high viscosity high elasticity stress absorbing layer 2, absorb macadam-aggregate mix by high viscosity high elasticity modified bitumen and waterproof bond stress and form).
Surface layer asphalt pavement material on waterproof bond stress absorbing bridge deck pavement material, paving again (as: modified bitumen AC-13 ground surface material) 3, on middle surface layer asphalt pavement material 3, pave again blacktop (be the upper strata flexible pavement, as: modified asphalt SMA-13 ground surface material) 4.
60 ℃ of viscosity of high-viscosity modified asphalt of preparation reach 77000Pas, and upper strata flexible pavement (blacktop 4) fatigue failure number of times is 25450 times, and the unit water percolating capacity is 0mL/min, and 25 ℃ are pulled out and draw intensity to reach 0.65MPa, and shear strength reaches 1.31MPa.(above content is waterproof, the bonding of waterproof bond stress absorbing bridge deck pavement material, the performance indications of stress absorption).
The waterproof bond stress absorbing bridge deck pavement material of present embodiment preparation can improve the upper strata flexible pavement fatigue failure life-span more than 50 times, the unit water percolating capacity is no more than 0.5mL/min, 25 ℃ are pulled out and draw intensity can reach more than the 0.60MPa, and shear strength can reach more than the 1.20MPa.Upper strata flexible pavement dynamic stability is influenced below 2%.
Embodiment 3:
A kind of preparation method of waterproof bond stress absorbing bridge deck pavement material, it comprises the steps:
1) preparation of high viscosity high elasticity modified bitumen:
1. the mass ratio by each component is a matrix pitch: modifier SBS: tackifier: bulking agent: stabilizing agent=100: 12.0: 3.0: 15.0: 1.0, choose matrix pitch, modifier SBS, tackifier, bulking agent and stabilizing agent, and standby;
Described matrix pitch is selected bitumen A H-90 for use;
Described modifier SBS is a styrene butadiene styrene block copolymer (SBS), selects the styrene butadiene styrene block copolymer (SBS) of line style for use;
Described tackifier are selected Petropols for use;
Described bulking agent is selected pentaerythrite for use;
Described stabilizing agent is selected polyamide-based stabilizing agent for use; Polyamide-based stabilizing agent is a polyamide-6;
At first matrix pitch and the modifier SBS with fusing puts into mixer stirring 60min, and temperature is controlled at 170 ℃, obtains asphalt mixture; Again asphalt mixture is added in the colloid mill and mill, through once adding tackifier and bulking agent after the circulation, continue to mill and circulate for 6 times, 170 ℃ of temperature controls, asphalt mixture after will milling again passes through high-speed shearing machine, adjust rotating speed 7000 commentaries on classics/min, add stabilizing agent, after treating all to add, continue high speed shear 30min, the control temperature is 180 ℃ during shearing, and the asphalt mixture after shearing after abundant swelling under 175 ℃, is promptly made high-viscosity modified asphalt;
2. in high-viscosity modified asphalt, add the active rubber powder, the mass ratio of high-viscosity modified asphalt and active rubber powder is 100: 15.0, high-viscosity modified asphalt is heated to 185 ℃, divide 4 addings with the active rubber powder, after each the adding asphalt mixture is passed through high-speed shearing machine, adjusting rotating speed is 6000 commentaries on classics/min, stirs 8min, leave standstill 30min at 180 ℃ after stirring finishes, promptly get the high viscosity high elasticity modified bitumen;
2) preparation of waterproof bond stress absorbing bridge deck pavement material:
Mass ratio by each component is a coarse aggregate: high viscosity high elasticity modified bitumen=100: 16.0, choose high viscosity high elasticity modified bitumen and coarse aggregate, and standby;
Described coarse aggregate is selected basalt for use, and nominal particle diameter is 9.5～13.2mm;
Adopt the batch (-type) mixing apparatus, spray into the high viscosity high elasticity modified bitumen and mix and stir 30s when adding coarse aggregate, mix and stir 185 ℃ of temperature, drop temperature is 170 ℃, obtains waterproof bond stress and absorbs macadam-aggregate mix;
3) mating formation of waterproof bond stress absorbing bridge deck pavement material:
1. precast prestressed concrete plate (as: C50 concrete) is carried out purified treatment, the applying high voltage hydraulic giant washes does not have obvious soil block on concrete slab, till the foreign matters such as stone;
2. the high viscosity high elasticity modified bitumen is heated to 180 ℃, adopts pitch to spread the shop car and carry out high viscosity high elasticity modified bitumen spreading on the precast prestressed concrete plate, the high viscosity high elasticity modified bitumen spills the shop amount and is 2.4kg/m
2Form the high viscosity high elasticity modified asphalt layer;
3. utilize paver in the high viscosity high elasticity modified bitumen spreads the 30s that spreads after finishing, to carry out the work that paves that waterproof bond stress absorbs macadam-aggregate mix; The temperature of waterproof bond stress absorption macadam-aggregate mix should remain on 180 ℃ when paving, and the shop amount of spilling that waterproof bond stress absorbs macadam-aggregate mix is 18kg/m
2Form waterproof bond stress and absorb the macadam-aggregate mix layer;
4. adopt steel roller to roll 5 times, make waterproof bond stress absorbing bridge deck pavement material (promptly form high viscosity high elasticity stress absorbing layer 2, absorb macadam-aggregate mix by high viscosity high elasticity modified bitumen and waterproof bond stress and form).
Surface layer asphalt pavement material on waterproof bond stress absorbing bridge deck pavement material, paving again (as: modified bitumen AC-13 ground surface material) 3, on middle surface layer asphalt pavement material 3, pave again blacktop (be the upper strata flexible pavement, as: modified asphalt SMA-13 ground surface material) 4.
60 ℃ of viscosity of high-viscosity modified asphalt of preparation reach 82000Pas, and upper strata flexible pavement fatigue failure number of times is 27620 times, and the unit water percolating capacity is 0mL/min, and 25 ℃ are pulled out and draw intensity to reach 0.71MPa, and shear strength reaches 1.39Mpa.(above content is waterproof, the bonding of the waterproof bond stress absorbing bridge deck pavement material that makes, the performance indications of stress absorption).
The waterproof bond stress absorbing bridge deck pavement material of present embodiment preparation can improve the upper strata flexible pavement fatigue failure life-span more than 50 times, the unit water percolating capacity is no more than 0.5mL/min, 25 ℃ are pulled out and draw intensity can reach more than the 0.60MPa, and shear strength can reach more than the 1.20MPa.Upper strata flexible pavement dynamic stability is influenced below 2%.
Each raw material that the present invention is cited and the bound value of each raw material, and the bound value of each technological parameter can both realize the present invention, do not enumerate embodiment one by one at this.
Claims (7)
1. the preparation method of a waterproof bond stress absorbing bridge deck pavement material is characterized in that it comprises the steps:
1) preparation of high viscosity high elasticity modified bitumen:
1. the mass ratio by each component is a matrix pitch: modifier SBS: tackifier: bulking agent: stabilizing agent=100: (5.2～15.3): (1.0～3.6): (5.0～18.7): (0.2～1.4), choose matrix pitch, modifier SBS, tackifier, bulking agent and stabilizing agent, standby;
At first matrix pitch and the modifier SBS with fusing puts into mixer stirring 30～60min, and temperature is controlled at 150～170 ℃, obtains asphalt mixture; Again asphalt mixture is added in the colloid mill and mill, through once adding tackifier and bulking agent after the circulation, 3～6 circulations continue to mill, 160～170 ℃ of temperature controls, asphalt mixture after will milling again passes through high-speed shearing machine, adjust rotating speed 3000～7000 commentaries on classics/min, add stabilizing agent, after treating all to add, continue high speed shear 15～30min, the control temperature is 150～180 ℃ during shearing, and the asphalt mixture after shearing after abundant swelling under 145～175 ℃, is obtained high-viscosity modified asphalt;
2. in high-viscosity modified asphalt, add the active rubber powder, the mass ratio of high-viscosity modified asphalt and active rubber powder is 100: (5.0～20.3), high-viscosity modified asphalt is heated to 165～185 ℃, divide 2～4 addings with the active rubber powder, mixture with high-viscosity modified asphalt and active rubber powder after each the adding passes through high-speed shearing machine, adjusting rotating speed is 4000～6000 commentaries on classics/min, stir 4～8min, leave standstill 15～30min at 140～180 ℃ after stirring finishes, obtain the high viscosity high elasticity modified bitumen;
2) preparation of waterproof bond stress absorbing bridge deck pavement material:
Mass ratio by each component is a coarse aggregate: high viscosity high elasticity modified bitumen=100: (8.0～20.5), choose high viscosity high elasticity modified bitumen and coarse aggregate, standby;
Adopt the batch (-type) mixing apparatus, spray into the high viscosity high elasticity modified bitumen and mix and stir 15～30s when adding coarse aggregate, mix and stir 170～185 ℃ of temperature, drop temperature is not less than 160 ℃, obtains waterproof bond stress and absorbs macadam-aggregate mix;
3) mating formation of waterproof bond stress absorbing bridge deck pavement material:
1. the precast prestressed concrete plate is carried out purified treatment;
2. the high viscosity high elasticity modified bitumen is heated to 160～180 ℃, adopts pitch to spread the shop car and carry out high viscosity high elasticity modified bitumen spreading on the precast prestressed concrete plate, it is 1.8～2.4kg/m that the high viscosity high elasticity modified bitumen spills the shop amount
2Form the high viscosity high elasticity modified asphalt layer;
3. utilize paver in the high viscosity high elasticity modified bitumen spreads the 5～30s that spreads after finishing, to carry out the work that paves that waterproof bond stress absorbs macadam-aggregate mix; The temperature that waterproof bond stress absorbs macadam-aggregate mix when paving should remain on 140～180 ℃, waterproof bond stress absorb macadam-aggregate mix to spill the shop amount be 12～18kg/m
2Form waterproof bond stress and absorb the macadam-aggregate mix layer;
4. adopt steel roller to roll 3～5 times, make waterproof bond stress absorbing bridge deck pavement material.
2. the preparation method of a kind of waterproof bond stress absorbing bridge deck pavement material according to claim 1, it is characterized in that: described matrix pitch is selected bitumen A H-70 or bitumen A H-90 for use.
3. the preparation method of a kind of waterproof bond stress absorbing bridge deck pavement material according to claim 1, it is characterized in that: described modifier SBS is a styrene butadiene styrene block copolymer (SBS).
4. the preparation method of a kind of waterproof bond stress absorbing bridge deck pavement material according to claim 1, it is characterized in that: described tackifier are selected Petropols or terpene resin for use.
5. the preparation method of a kind of waterproof bond stress absorbing bridge deck pavement material according to claim 1, it is characterized in that: described bulking agent is selected dihydrofuran, pentaerythrite or pentaerythritol ester bulking agent for use.
6. the preparation method of a kind of waterproof bond stress absorbing bridge deck pavement material according to claim 1, it is characterized in that: described stabilizing agent is selected polyamide-based stabilizing agent or sulphur class stabilizing agent for use.
7. the preparation method of a kind of waterproof bond stress absorbing bridge deck pavement material according to claim 1, it is characterized in that: described coarse aggregate is selected basalt or diabase for use, and nominal particle diameter is 9.5～13.2mm or 13.2～16mm.
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| CN200910063308XA CN101629405B (en) | 2009-07-24 | 2009-07-24 | Waterproof bond stress absorbing bridge deck pavement material preparation method |
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| CN200910063308XA CN101629405B (en) | 2009-07-24 | 2009-07-24 | Waterproof bond stress absorbing bridge deck pavement material preparation method |
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| CN101629405A CN101629405A (en) | 2010-01-20 |
| CN101629405B true CN101629405B (en) | 2011-06-08 |
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| CN105838097B (en) * | 2016-06-15 | 2018-06-29 | 涂淑光 | A kind of asphaltum with high viscosity and preparation method thereof |
| CN106626571A (en) * | 2016-09-29 | 2017-05-10 | 长安大学 | Polymer modified asphalt pavement bonding layer |
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| CN109280236A (en) * | 2018-08-27 | 2019-01-29 | 江西博奕体育塑胶材料科技有限公司 | A method of making carrier production macromolecule pavement material with SBS |
| CN109485308B (en) * | 2018-12-29 | 2021-07-06 | 中建商品混凝土有限公司 | Water-filtering embedded material for permeable asphalt concrete surface 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 |
| 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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