CN101671991B - Method for paving combination paving layer for tunnel road surface - Google Patents
Method for paving combination paving layer for tunnel road surface Download PDFInfo
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- CN101671991B CN101671991B CN2009100635278A CN200910063527A CN101671991B CN 101671991 B CN101671991 B CN 101671991B CN 2009100635278 A CN2009100635278 A CN 2009100635278A CN 200910063527 A CN200910063527 A CN 200910063527A CN 101671991 B CN101671991 B CN 101671991B
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Abstract
The invention belongs to the field of building materials and particularly relates to a method for paving a pavement paving layerfor a tunnel road surface. The method is characterized by comprising the following steps: firstly, preparing flame retardant high-viscosity modified asphalt which is prepared from styrene-butadiene-styrene block copolymer, tackifier, compatibilizer, stabilizer, flame retardant and smoke suppressant and base asphalt; secondly, cleaning the surface of a concrete layer 1 of the tunnel surface; thirdly, paving and spreading a bottom surface adhesive layer, i.e. spreading and paving modified emulsion asphalt on the concrete layer 1 of the cleaned tunnel surface by utilizing an asphalt spreading and paving vehicle to obtain a bottom surface bonding layer 2, wherein the spreading and paving quantity of the modified emulsion asphalt is 0.8-1.0kg/m<2>; fourthly, paving a mid-surface layer which can highly resist rutting; fifthly, paving a waterproof and oilproof bonding layer; and sixthly, paving a fireproof, noise reducing and anti-slip top surface layer. The combination paving layer obtained from the method has the characteristics of excellent pavement performance, fireproofness, slip resistance and noise reduction.
Description
Technical field
The invention belongs to building material field, be specifically related to a kind of tunnel road surface mat formation the layer paving method.
Background technology
Along with the rapid development of World Economics, each economic giant of the world has all accelerated the paces of road construction, and set up one extend in all direction, primary goal that unimpeded convenient, comfortable safe road network is considered as promoting the domestic economy fast development.Yet limited soil and space resources can't satisfy the transport need that grows with each passing day.Middle and later periods in 20th century, people began sight is focused on the exploitation of the underground space along with shield structure technology is increasingly mature, and the quantity of highway tunnel, length all constantly increase.
Tunnel internal belongs to hemi-closure space, in case traffic accident appears, vehicle fire, and flammable liquids such as gasoline trickling diffusion, fire spreading will constitute grave danger to personnel's life and other vehicles.So the tunnel asphalt surface layer must meet following some requirement: 1) require excellent road performance, good endurance; 2) pavement skid resistance condition is good, and special cling property under wet environment reduces road accident rate; 3) have excellent fire protection flame retarding function, even have certain control action, reduce casualties and economic loss in the tunnel fire hazard for tunnel fire hazard; 4) have certain decrease of noise functions, improve the road-ability of tunnel road surface.
At present, traffic design code requirement tunnel road surface adopts cement concrete pavement, because road surface, rigid pavement structure is closely knit, sound absorption coefficient is lower, vehicle is very serious in the travel noise pollution that produces of cement concrete pavement, the rigidity characteristics of rigid pavement cause its road-ability relatively poor in addition.Advantages such as the plain asphalt road surface has specious, and road-ability is good, but when the tunnel breaking out of fire, the flexible pavement that comes into operation at present also can burn, and a large amount of poison gas that give off directly threaten life safety.Therefore it is imperative in the paving method of the novel tunnel road surface of one combination paving layer to develop the fire prevention of a kind of excellent road performance union, noise reduction, antiskid.
Summary of the invention
The object of the present invention is to provide a kind of paving method of combination paving layer for tunnel road surface, the combination paving layer that this method obtains has excellent road performance and has the characteristics of fire prevention, antiskid, noise reduction.
To achieve these goals, technical scheme of the present invention is: a kind of paving method of combination paving layer for tunnel road surface is characterized in that it comprises the steps:
1) preparation of fire-retardant high-viscosity modified asphalt:
Fire-retardant high-viscosity modified asphalt is made up of styrene butadiene styrene block copolymer (SBS) (SBS), tackifier, bulking agent, stabilizing agent and anti-flaming smoke-inhibiting agent and matrix pitch, and each constituent mass is than being matrix pitch: styrene butadiene styrene block copolymer (SBS): tackifier: bulking agent: stabilizing agent: anti-flaming smoke-inhibiting agent=100: (5.2～15.3): (1.0～3.6): (5.0～18.7): (0.2～1.4): (6.5～12.5); Earlier matrix pitch fusing back is added styrene butadiene styrene block copolymer (SBS), stirring at low speed 10～15min under 150～170 ℃ of conditions, pass through high-speed shearing machine then, high-speed stirred 45～60min under 160～180 ℃ of conditions, rotating speed is 3000～4000r/min, under 140～150 ℃ temperature condition, place 60～90min then, make its abundant swelling, add tackifier at last, bulking agent, stabilizing agent and anti-flaming smoke-inhibiting agent pass through high-speed shearing machine high-speed stirred 15～30min under 160～180 ℃ of conditions, rotating speed is 3000～4000r/min, can make fire-retardant high-viscosity modified asphalt;
Described matrix pitch is selected bitumen A H-70 for use;
Described tackifier are selected Petropols or terpene resin for use;
Described bulking agent selects 2 for use, 3-dihydrofuran or pentaerythrite bulking agent;
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 anti-flaming smoke-inhibiting agent is made up of decabromodiphenyl oxide, antimony oxide and aluminium hydroxide; Press decabromodiphenyl oxide: antimony oxide: the mass ratio of aluminium hydroxide=100: (5～50): (50～75), choose decabromodiphenyl oxide, antimony oxide and aluminium hydroxide, the evenly mixed anti-flaming smoke-inhibiting agent that gets;
2) surface of tunnel road surface layer of concrete 1 is cleaned;
3) spreading of bottom surface tack coat: utilize pitch to spread the shop car on the tunnel road surface layer of concrete 1 that finishes to spread the shop modified emulsifying asphalt cleaning, the shop amount of spilling of modified emulsifying asphalt is 0.8～1.0kg/m
2, obtain bottom surface tack coat 2;
4) the mating formation of surface layer in the high anti-rut:
A. the match ratio of surface layer bituminous mixture design in the high anti-rut:
The surface layer bituminous mixture is made up of coarse aggregate, fine aggregate, matrix pitch, breeze and anti-rut agent in the high anti-rut, coarse aggregate: fine aggregate: matrix pitch: breeze: the mass ratio of anti-rut agent=100: (80～120): (2～4): (1～3): (0.2～0.5), its mineral aggregate gradation scope sees Table 1:
Table 1
Described anti-rut agent is made up of regeneration low density polyethylene (LDPE), Petropols, activating rubber powder, regeneration low density polyethylene (LDPE): Petropols: the mass ratio of activating rubber powder=100: (20～40): (0～15), to regenerate after low density polyethylene (LDPE), Petropols, activating rubber powder mix in proportion at normal temperatures, drop into double screw extruder, 140～160 ℃ of start blending temperature controls, mixture is cooled to normal temperature and promptly gets anti-rut agent through the extruder extruding pelletization;
B. the preparation of surface layer bituminous mixture and mating formation in the high anti-rut:
Add coarse aggregate, fine aggregate, breeze and anti-rut agent earlier and add mix pot mix 30～90s (second), add matrix pitch mix 60～90s subsequently, the temperature of mixing when stirring is 170～190 ℃, obtains surface layer bituminous mixture in the high anti-rut; After treating the complete breakdown of emulsion of modified emulsifying asphalt of bottom surface tack coat 2, use paver with surface layer bituminous mixture laying in the anti-rut of height to bottom surface tack coat 2, adopt steel wheel first pressing 1～2 time, adopt rubber tire to press again then 2～3 times, adopt steel wheel final pressure at last 1～2 time, the temperature that paves is not less than 170 ℃, rolls temperature and must not be lower than 120 ℃, make surface layer 3 in the high anti-rut, the thickness of surface layer 3 is 4～6cm in the high anti-rut;
5) laying of waterproof, grease proofing, tack coat:
The temperature for the treatment of surface layer in the high anti-rut is reduced under the situation below 50 ℃, with 160～180 ℃ of fire-retardant high-viscosity modified asphalt heating, the pitch that employing has a powerful bedroom mixing plant spreads the shop of spreading that the shop car carries out fire-retardant high-viscosity modified asphalt, fire-retardant high-viscosity modified asphalt to spill the shop amount be 1.0～1.5kg/m
2The rubble material is heated to 120～140 ℃, spreads the shop at fire-retardant high-viscosity modified asphalt and adopt after finishing rubble to spread the shop car immediately the rubble material is spread the shop, the rubble material to spill the shop amount be 6～10kg/m
2Adopt steel roller to roll at last 3～5 times, waterproof when it rolls, temperature grease proofing, tack coat should be at 120～160 ℃; Mat formation finish after, form waterproof, grease proofing, tack coat 4, waterproof, thickness grease proofing, tack coat 4 are 0.5～1cm;
6) mating formation of fire prevention, noise reduction, antiskid upper layer:
The match ratio design of a. fire prevention, noise reduction, antiskid upper layer material
Fire prevention, noise reduction, antiskid supercrust material are by coarse aggregate, fine aggregate, fire-retardant high-viscosity modified asphalt, fire-retardant breeze and fibrous, coarse aggregate: fine aggregate: fire-retardant high-viscosity modified asphalt: fire-retardant breeze: quality of fiber is than=100: (10～30): (4～6): (2～4): (0.2～0.5), and its mineral aggregate gradation scope sees Table 2:
Table 2
Described fire-retardant breeze mainly is made up of magnesium hydroxide, aluminium hydroxide, magnesia and limestone dust, magnesium hydroxide: aluminium hydroxide: magnesia: the mass ratio of limestone dust=100: (30～50): (10～20): (30～50) promptly obtain fire-retardant breeze with the even mixing of magnesium hydroxide, aluminium hydroxide, magnesia and limestone dust;
The preparation of b. fire prevention, noise reduction, antiskid upper layer material and mating formation:
Add coarse aggregate, fine aggregate, fire-retardant breeze and fiber earlier and add mix pot mix 30～90s, add fire-retardant high-viscosity modified asphalt mix 60～90s subsequently, the temperature of mixing when stirring is 170～190 ℃, obtains fire prevention, noise reduction, antiskid upper layer material; After treating waterproof, grease proofing, the complete hardening by cooling of tack coat, use paver that fire prevention, noise reduction, antiskid upper layer material are paved on waterproof, grease proofing, the tack coat, adopt steel wheel compacting 3～5 times, the temperature that paves is not less than 170 ℃, make fire prevention, noise reduction, antiskid upper layer 5, the thickness of fire prevention, noise reduction, antiskid upper layer 5 is 3～5cm.
The described modified emulsifying asphalt of step 3) (as: modified emulsifying asphalt that the modified emulsifying asphalt that Hubei Guochuang Hi-tech Material Co., Ltd. produces or Guangdong Luxiang Co., Ltd. produce).
Step 4), the described coarse aggregate of step 6) are limestone, basalt or diabase.
Step 4), the described fine aggregate of step 6) are limestone mechanism sand or basalt mechanism sand.
The described breeze of step 4) is a limestone dust.
The described matrix pitch of step 4) is the AH-70 matrix pitch.
The described rubble material of step 5) is basalt or diabase rubble, and particle diameter is 9.5mm～4.75mm.
The described fiber of step 6) is organosolv lignin fiber or inorganic mineral fiber.
Step 5), the described fire-retardant high-viscosity modified asphalt of step 6) are according to the synthetic fire-retardant high-viscosity modified asphalt of step 1) method.
Described low speed is meant that rotating speed is 1000～2000r/min, and described high speed is meant that rotating speed is 3000～4000r/min.
The invention has the beneficial effects as follows:
1, fire-retardant high-viscosity modified asphalt of the present invention has improved the fireproof performance of pitch, makes fire prevention, noise reduction, antiskid upper layer can not play the cigarette burning under 500～1200 ℃ of conditions, has the good function of fireproof performance.
2, upper layer of the present invention utilizes the grating of OGFC-13 to require to carry out the match ratio design, obtain void content and be 18～22% fire prevention, noise reduction, antiskid upper layer, changed the acoustic impedance of road structure, increased the delivery capabilities of incident sound, when sound arrives waterproof, 2 secondary reflections take place for grease proofing, tack coat, make direct sound and reflected sound that violent interference effect take place, reduced strength of sound source.Simultaneously the characteristics in its big space make in case traffic accident takes place, from automobile the gasoline of seepage rapidly the row of obtaining escape, and enter the gutter rapidly along waterproof, grease proofing, tack coat, reach the fire-retardant purpose of structure.Because what it adopted is that single particle size gathers materials, and makes pavement structural depth more than 1.5, increase the friction factor on road surface, thereby improved anti-slide performance, reduced the possibility that traffic accident takes place.
3, waterproof, the gasoline centering surface layer ground surface material (surface layer in the high anti-rut) of upper layer ground surface material (fire prevention, noise reduction, antiskid upper layer) row ease caused damage when setting grease proofing, tack coat had prevented traffic accident, play isolation effect preferably, and adopt fire-retardant high-viscosity modified asphalt to improve adhesion stress between middle surface layer and the upper layer, prevented the generation of interlayer slip phenomenon preferably.
4, middle surface layer (surface layer in the high anti-rut) utilizes anti-rut agent to prepare surface layer bituminous mixture in the high anti-rut (AC-20 bituminous mixture), prevented combination paving layer for tunnel road surface preferably because the pavement track phenomenon that middle surface layer shear failure causes, and middle surface layer adopts the rigidity that has obviously improved ground surface material behind the anti-rut agent, formed between layer ground surface material and the rigid pavement well excessively in the above.
The fire-retardant breeze of 5, fire prevention, noise reduction, antiskid upper layer (its key component is aluminium hydroxide and magnesium hydroxide), it is magnesia and alumina that magnesium hydroxide and aluminium hydroxide are understood decomposes before at flame-retardant pitch flash-point (320 ℃), in this process, can absorb a large amount of heat, so pavement temperature in gasoline combustion process, prevent the pitch burning, reach fire-retardant effect.
1) fire-retardant high-viscosity modified asphalt technical indicator:
A. oxygen index (OI) 〉=21;
B. horizontal firing index: reach that the I level is difficult burns;
C. needle penetration (25 ℃, 100g, 5s, 0.01mm): 45～75;
D. softening point 〉=90 ℃;
E. ductility (5cm/min, 5 ℃) 〉=40cm;
F.60 ℃ dynamic viscosity 〉=20000Pas;
The technical indicator of 2) fire prevention, noise reduction, antiskid upper layer:
A. void content 18%～22%;
B. construction depth 〉=1.5mm;
C. friction factor (BPN) 〉=65;
D. unit interval seepage rate 〉=1000ml/min;
E. noise: reducing noise than plain asphalt road surface is more than 4 decibels;
3) technical indicator of waterproof, grease proofing, tack coat:
A. pull strength 〉=0.6MPa;
B. shear strength 〉=1.0MPa;
C. unit interval seepage rate≤0.5ml/min;
4) technical indicator of surface layer in the high anti-rut:
A. dynamic stability 〉=6000 time/mm;
B. Marshall stability 〉=8.0KN;
C. the freeze thawing cleavage strength is than 〉=80%;
D. residual stability 〉=80% soaks.
Description of drawings
Fig. 1 is the structural representation of combination paving layer for tunnel road surface of the present invention;
Among the figure: 1-tunnel road surface layer of concrete, 2-bottom surface tack coat, surface layer in the high anti-rut of 3-, 4-waterproof, grease proofing, tack coat, 5-fire prevention, noise reduction, antiskid upper layer.
The specific embodiment
Embodiment 1:
As shown in Figure 1, a kind of paving method of combination paving layer for tunnel road surface, it comprises the steps:
1) preparation of fire-retardant high-viscosity modified asphalt:
Fire-retardant high-viscosity modified asphalt is made up of styrene butadiene styrene block copolymer (SBS) (SBS), tackifier, bulking agent, stabilizing agent and anti-flaming smoke-inhibiting agent and matrix pitch, and each constituent mass is than being matrix pitch: styrene butadiene styrene block copolymer (SBS): tackifier: bulking agent: stabilizing agent: anti-flaming smoke-inhibiting agent=100: 7.0: 1.5: 6.0: 0.5: 7.0; Earlier matrix pitch fusing back is added styrene butadiene styrene block copolymer (SBS), stirring at low speed 10min under 150 ℃ of conditions, pass through high-speed shearing machine then, high-speed stirred 45min under 160 ℃ of conditions, rotating speed is 3000r/min, under 140 ℃ temperature condition, place 60min then, make its abundant swelling, add tackifier, bulking agent, stabilizing agent and anti-flaming smoke-inhibiting agent at last and under 160 ℃ of conditions, pass through high-speed shearing machine high-speed stirred 15min, rotating speed is 3000r/min, can make fire-retardant high-viscosity modified asphalt;
Described matrix pitch is selected bitumen A H-70 for use;
Described tackifier are selected Petropols for use;
Described bulking agent selects 2 for use, the 3-dihydrofuran;
Described stabilizing agent is selected polyamide-based stabilizing agent for use, is polyamide 6;
Described anti-flaming smoke-inhibiting agent is made up of decabromodiphenyl oxide, antimony oxide and aluminium hydroxide; Press decabromodiphenyl oxide: antimony oxide: the mass ratio of aluminium hydroxide=100: 20: 50, choose decabromodiphenyl oxide, antimony oxide and aluminium hydroxide, the evenly mixed anti-flaming smoke-inhibiting agent that gets;
2) surface of tunnel road surface layer of concrete 1 is cleaned;
3) spreading of bottom surface tack coat: utilize pitch to spread the shop car on the tunnel road surface layer of concrete 1 that finishes to spread the shop modified emulsifying asphalt cleaning, the shop amount of spilling of modified emulsifying asphalt is 0.8kg/m
2, obtain bottom surface tack coat 2;
Described modified emulsifying asphalt as: the modified emulsifying asphalt that Hubei Guochuang Hi-tech Material Co., Ltd. produces };
4) the mating formation of surface layer in the high anti-rut:
A. the match ratio of surface layer bituminous mixture design in the high anti-rut:
The surface layer bituminous mixture is made up of coarse aggregate, fine aggregate, matrix pitch, breeze and anti-rut agent in the high anti-rut, coarse aggregate: fine aggregate: matrix pitch: breeze: the mass ratio of anti-rut agent=100: 80: 2: 2: 0.4, its mineral aggregate gradation scope saw Table 3:
Table 3
Described coarse aggregate is a basalt;
Described fine aggregate is a limestone mechanism sand;
Described breeze is a limestone dust;
Described matrix pitch is the AH-70 matrix pitch;
Described anti-rut agent is made up of regeneration low density polyethylene (LDPE), Petropols, activating rubber powder, regeneration low density polyethylene (LDPE): Petropols: the mass ratio of activating rubber powder=100: 20: 10, to regenerate after low density polyethylene (LDPE), Petropols, activating rubber powder mix in proportion at normal temperatures, drop into double screw extruder, 150 ℃ of start blending temperature controls, mixture is cooled to normal temperature and promptly gets anti-rut agent through the extruder extruding pelletization;
B. the preparation of surface layer bituminous mixture and mating formation in the high anti-rut:
Add coarse aggregate, fine aggregate, breeze and anti-rut agent earlier and add mix pot mix 60s (second), add matrix pitch mix 90s subsequently, the temperature of mixing when stirring is 190 ℃, obtains surface layer bituminous mixture in the high anti-rut; After treating the complete breakdown of emulsion of modified emulsifying asphalt of bottom surface tack coat 2, use paver with surface layer bituminous mixture laying in the anti-rut of height to bottom surface tack coat 2, adopt steel wheel first pressing 2 times, adopt rubber tire to press again then 3 times, adopt steel wheel final pressure at last 2 times, the temperature that paves is not less than 170 ℃, rolls temperature and must not be lower than 120 ℃, make surface layer 3 in the high anti-rut, the thickness of surface layer 3 is 6cm in the high anti-rut;
5) laying of waterproof, grease proofing, tack coat:
The temperature for the treatment of surface layer in the high anti-rut is reduced under the situation below 50 ℃, with 180 ℃ of fire-retardant high-viscosity modified asphalt heating, the pitch that employing has powerful bedroom mixing plant spreads the shop of spreading that the shop car carries out fire-retardant high-viscosity modified asphalt, and the shop amount of spilling of fire-retardant high-viscosity modified asphalt is 1.2kg/m
2The rubble material is heated to 140 ℃, spreads the shop at fire-retardant high-viscosity modified asphalt and adopt after finishing rubble to spread the shop car immediately the rubble material is spread the shop, the shop amount of spilling of rubble material is 8kg/m
2Adopt steel roller to roll at last 4 times, waterproof when it rolls, temperature grease proofing, tack coat should be at 160 ℃; Mat formation finish after, form waterproof, grease proofing, tack coat 4, waterproof, thickness grease proofing, tack coat 4 are 0.8cm;
Described rubble material is a basalt, and particle diameter is 9.5mm～4.75mm;
6) mating formation of fire prevention, noise reduction, antiskid upper layer:
The match ratio design of a. fire prevention, noise reduction, antiskid upper layer material
Fire prevention, noise reduction, antiskid supercrust material are by coarse aggregate, fine aggregate, fire-retardant high-viscosity modified asphalt, fire-retardant breeze and fibrous, coarse aggregate: fine aggregate: fire-retardant high-viscosity modified asphalt: fire-retardant breeze: quality of fiber is than=100: 20: 5: 3: 0.3, and its mineral aggregate gradation scope sees Table 4:
Table 4
Described coarse aggregate is a basalt;
Described fine aggregate is a limestone mechanism sand;
Described fiber is the organosolv lignin fiber;
Described fire-retardant breeze mainly is made up of magnesium hydroxide, aluminium hydroxide, magnesia and limestone dust, magnesium hydroxide: aluminium hydroxide: magnesia: the mass ratio of limestone dust=100: 30: 10: 30, the even mixing of magnesium hydroxide, aluminium hydroxide, magnesia and limestone dust is promptly obtained fire-retardant breeze;
The preparation of b. fire prevention, noise reduction, antiskid upper layer material and mating formation:
Add coarse aggregate, fine aggregate, fire-retardant breeze and fiber earlier and add mix pot mix 60s, add fire-retardant high-viscosity modified asphalt mix 80s subsequently, the temperature of mixing when stirring is 190 ℃, obtains fire prevention, noise reduction, antiskid upper layer material; After treating waterproof, grease proofing, the complete hardening by cooling of tack coat, use paver that fire prevention, noise reduction, antiskid upper layer material are paved on waterproof, grease proofing, the tack coat, adopt steel wheel compacting 4 times, the temperature that paves is not less than 170 ℃, make fire prevention, noise reduction, antiskid upper layer 5, the thickness of fire prevention, noise reduction, antiskid upper layer 5 is 4cm.
Present embodiment is detected: utilizing the oxygen index (OI) of the fire-retardant high-viscosity modified asphalt of the method preparation is 23, has improved the fire resistance (characteristics with fire line) of combination paving layer for tunnel road surface; The void content of fire prevention, noise reduction, antiskid upper layer is 22%, and construction depth is 1.70mm, and friction factor is 72 (characteristics with skid resistance), reduces noise more than 7 decibels (characteristics with noise reduction); The interlayer pull strength of combination paving layer for tunnel road surface is 0.67MPa, and shear strength is 1.07MPa, and dynamic stability is 6200 times/mm (characteristics with excellent road performance).
Embodiment 2:
A kind of paving method of combination paving layer for tunnel road surface, it comprises the steps:
1) preparation of fire-retardant high-viscosity modified asphalt:
Fire-retardant high-viscosity modified asphalt is made up of styrene butadiene styrene block copolymer (SBS) (SBS), tackifier, bulking agent, stabilizing agent and anti-flaming smoke-inhibiting agent and matrix pitch, and each constituent mass is than being matrix pitch: styrene butadiene styrene block copolymer (SBS): tackifier: bulking agent: stabilizing agent: anti-flaming smoke-inhibiting agent=100: 11.2: 3.0: 13.9: 1.2: 11.6; Earlier matrix pitch fusing back is added styrene butadiene styrene block copolymer (SBS), stirring at low speed 15min under 170 ℃ of conditions, pass through high-speed shearing machine then, high-speed stirred 60min under 180 ℃ of conditions, rotating speed is 4000r/min, under 150 ℃ temperature condition, place 90min then, make its abundant swelling, add tackifier, bulking agent, stabilizing agent and anti-flaming smoke-inhibiting agent at last and under 180 ℃ of conditions, pass through high-speed shearing machine high-speed stirred 30min, rotating speed is 4000r/min, can make fire-retardant high-viscosity modified asphalt;
Described matrix pitch is selected bitumen A H-70 for use;
Described tackifier are selected terpene resin for use;
Described bulking agent is selected the pentaerythrite bulking agent for use;
Described stabilizing agent is selected sulphur class stabilizing agent for use; As sulphur;
Described anti-flaming smoke-inhibiting agent is made up of decabromodiphenyl oxide, antimony oxide and aluminium hydroxide; Press decabromodiphenyl oxide: antimony oxide: the mass ratio of aluminium hydroxide=100: 30: 60, choose decabromodiphenyl oxide, antimony oxide and aluminium hydroxide, the evenly mixed anti-flaming smoke-inhibiting agent that gets;
2) surface of tunnel road surface layer of concrete 1 is cleaned;
3) spreading of bottom surface tack coat: utilize pitch to spread the shop car on the tunnel road surface layer of concrete 1 that finishes to spread the shop modified emulsifying asphalt cleaning, the shop amount of spilling of modified emulsifying asphalt is 1.0kg/m
2, obtain bottom surface tack coat 2;
Described modified emulsifying asphalt (as: modified emulsifying asphalt that Guangdong Luxiang Co., Ltd. produces);
4) the mating formation of surface layer in the high anti-rut:
A. the match ratio of surface layer bituminous mixture design in the high anti-rut:
The surface layer bituminous mixture is made up of coarse aggregate, fine aggregate, matrix pitch, breeze and anti-rut agent in the high anti-rut, coarse aggregate: fine aggregate: matrix pitch: breeze: the mass ratio of anti-rut agent=100: 100: 4: 3: 0.5, its mineral aggregate gradation scope saw Table 5:
Table 5
Described coarse aggregate is a limestone;
Described fine aggregate is a limestone mechanism sand;
Described breeze is a limestone dust;
Described matrix pitch is the AH-70 matrix pitch;
Described anti-rut agent is made up of regeneration low density polyethylene (LDPE), Petropols, activating rubber powder, regeneration low density polyethylene (LDPE): Petropols: the mass ratio of activating rubber powder=100: 30: 10, to regenerate after low density polyethylene (LDPE), Petropols, activating rubber powder mix in proportion at normal temperatures, drop into double screw extruder, 140 ℃ of start blending temperature controls, mixture is cooled to normal temperature and promptly gets anti-rut agent through the extruder extruding pelletization;
B. the preparation of surface layer bituminous mixture and mating formation in the high anti-rut:
Add coarse aggregate, fine aggregate, breeze and anti-rut agent earlier and add mix pot mix 90s (second), add matrix pitch mix 90s subsequently, the temperature of mixing when stirring is 190 ℃, obtains surface layer bituminous mixture in the high anti-rut; After treating the complete breakdown of emulsion of modified emulsifying asphalt of bottom surface tack coat 2, use paver with surface layer bituminous mixture laying in the anti-rut of height to bottom surface tack coat 2, adopt steel wheel first pressing 2 times, adopt rubber tire to press again then 2 times, adopt steel wheel final pressure at last 2 times, the temperature that paves is 180 ℃, and rolling temperature is 130 ℃, make surface layer 3 in the high anti-rut, the thickness of surface layer 3 is 6cm in the high anti-rut;
5) laying of waterproof, grease proofing, tack coat:
The temperature for the treatment of surface layer in the high anti-rut is reduced under the situation below 50 ℃, with 180 ℃ of fire-retardant high-viscosity modified asphalt heating, the pitch that employing has powerful bedroom mixing plant spreads the shop of spreading that the shop car carries out fire-retardant high-viscosity modified asphalt, and the shop amount of spilling of fire-retardant high-viscosity modified asphalt is 1.5kg/m
2The rubble material is heated to 140 ℃, spreads the shop at fire-retardant high-viscosity modified asphalt and adopt after finishing rubble to spread the shop car immediately the rubble material is spread the shop, the shop amount of spilling of rubble material is 10kg/m
2Adopt steel roller to roll at last 5 times, waterproof when it rolls, temperature grease proofing, tack coat should be at 160 ℃; Mat formation finish after, form waterproof, grease proofing, tack coat 4, waterproof, thickness grease proofing, tack coat 4 are 1cm;
Described rubble material is the diabase rubble, and particle diameter is 9.5mm～4.75mm.
6) mating formation of fire prevention, noise reduction, antiskid upper layer:
The match ratio design of a. fire prevention, noise reduction, antiskid upper layer material
Fire prevention, noise reduction, antiskid supercrust material are by coarse aggregate, fine aggregate, fire-retardant high-viscosity modified asphalt, fire-retardant breeze and fibrous, coarse aggregate: fine aggregate: fire-retardant high-viscosity modified asphalt: fire-retardant breeze: quality of fiber is than=100: 30: 6: 4: 0.5,, its mineral aggregate gradation scope sees Table 6:
Table 6
Described coarse aggregate is a limestone;
Described fine aggregate is a limestone mechanism sand;
Described fiber is an inorganic mineral fiber;
Described fire-retardant breeze mainly is made up of magnesium hydroxide, aluminium hydroxide, magnesia and limestone dust, magnesium hydroxide: aluminium hydroxide: magnesia: the mass ratio of limestone dust=100: 40: 15: 40, the even mixing of magnesium hydroxide, aluminium hydroxide, magnesia and limestone dust is promptly obtained fire-retardant breeze;
The preparation of b. fire prevention, noise reduction, antiskid upper layer material and mating formation:
Add coarse aggregate, fine aggregate, fire-retardant breeze and fiber earlier and add mix pot mix 90s, add fire-retardant high-viscosity modified asphalt mix 90s subsequently, the temperature of mixing when stirring is 190 ℃, obtains fire prevention, noise reduction, antiskid upper layer material; After treating waterproof, grease proofing, the complete hardening by cooling of tack coat, use paver that fire prevention, noise reduction, antiskid upper layer material are paved on waterproof, grease proofing, the tack coat, adopt steel wheel compacting 5 times, the temperature that paves is 180 ℃, make fire prevention, noise reduction, antiskid upper layer 5, the thickness of fire prevention, noise reduction, antiskid upper layer 5 is 5cm.
Present embodiment is detected: utilizing the oxygen index (OI) of the fire-retardant high-viscosity modified asphalt of the method preparation is 27, has improved the fire resistance (characteristics with fire line) of combination paving layer for tunnel road surface; The void content of fire prevention, noise reduction, antiskid upper layer is 20%, and construction depth is 1.65mm, and friction factor is 68 (characteristics with skid resistance), reduces noise more than 5 decibels (characteristics with noise reduction); The interlayer pull strength of combination paving layer for tunnel road surface is 0.72MPa, and shear strength is 1.10MPa, and dynamic stability is 6800 times/mm (characteristics with excellent road performance).
Embodiment 3:
A kind of paving method of combination paving layer for tunnel road surface, it comprises the steps:
1) preparation of fire-retardant high-viscosity modified asphalt:
Fire-retardant high-viscosity modified asphalt is made up of styrene butadiene styrene block copolymer (SBS) (SBS), tackifier, bulking agent, stabilizing agent and anti-flaming smoke-inhibiting agent and matrix pitch, and each constituent mass is than being matrix pitch: styrene butadiene styrene block copolymer (SBS): tackifier: bulking agent: stabilizing agent: anti-flaming smoke-inhibiting agent=100: 5.2: 1.0: 5.0: 0.2: 6.5; Earlier matrix pitch fusing back is added styrene butadiene styrene block copolymer (SBS), stirring at low speed 10min under 150 ℃ of conditions, pass through high-speed shearing machine then, high-speed stirred 45min under 160 ℃ of conditions, rotating speed is 3000r/min, under 140 ℃ temperature condition, place 60min then, make its abundant swelling, add tackifier, bulking agent, stabilizing agent and anti-flaming smoke-inhibiting agent at last and under 160 ℃ of conditions, pass through high-speed shearing machine high-speed stirred 15min, rotating speed is 3000r/min, can make fire-retardant high-viscosity modified asphalt;
Described matrix pitch is selected bitumen A H-70 for use;
Described tackifier are selected Petropols for use;
Described bulking agent selects 2 for use, the 3-dihydrofuran;
Described stabilizing agent is selected polyamide-based stabilizing agent for use; As polyamide 66;
Described anti-flaming smoke-inhibiting agent is made up of decabromodiphenyl oxide, antimony oxide and aluminium hydroxide; Press decabromodiphenyl oxide: antimony oxide: the mass ratio of aluminium hydroxide=100: 5: 50, choose decabromodiphenyl oxide, antimony oxide and aluminium hydroxide, the evenly mixed anti-flaming smoke-inhibiting agent that gets;
2) surface of tunnel road surface layer of concrete 1 is cleaned;
3) spreading of bottom surface tack coat: utilize pitch to spread the shop car on the tunnel road surface layer of concrete 1 that finishes to spread the shop modified emulsifying asphalt cleaning, the shop amount of spilling of modified emulsifying asphalt is 0.8kg/m
2, obtain bottom surface tack coat 2;
Described modified emulsifying asphalt (as: modified emulsifying asphalt that Hubei Guochuang Hi-tech Material Co., Ltd. produces).
4) the mating formation of surface layer in the high anti-rut:
A. the match ratio of surface layer bituminous mixture design in the high anti-rut:
The surface layer bituminous mixture is made up of coarse aggregate, fine aggregate, matrix pitch, breeze and anti-rut agent in the high anti-rut, coarse aggregate: fine aggregate: matrix pitch: breeze: the mass ratio of anti-rut agent=100: 80: 2: 1: 0.2, its mineral aggregate gradation scope saw Table 7:
Table 7
Described coarse aggregate is a basalt;
Described fine aggregate is a limestone mechanism sand;
Described breeze is a limestone dust;
Described matrix pitch is the AH-70 matrix pitch;
Described anti-rut agent is made up of regeneration low density polyethylene (LDPE), Petropols, activating rubber powder, regeneration low density polyethylene (LDPE): Petropols: the mass ratio of activating rubber powder=100: 40: 15, to regenerate after low density polyethylene (LDPE), Petropols, activating rubber powder mix in proportion at normal temperatures, drop into double screw extruder, 140 ℃ of start blending temperature controls, mixture is cooled to normal temperature and promptly gets anti-rut agent through the extruder extruding pelletization;
B. the preparation of surface layer bituminous mixture and mating formation in the high anti-rut:
Add coarse aggregate, fine aggregate, breeze and anti-rut agent earlier and add mix pot mix 30s (second), add matrix pitch mix 60s subsequently, the temperature of mixing when stirring is 170 ℃, obtains surface layer bituminous mixture in the high anti-rut; After treating the complete breakdown of emulsion of modified emulsifying asphalt of bottom surface tack coat 2, use paver with surface layer bituminous mixture laying in the anti-rut of height to bottom surface tack coat 2, adopt steel wheel first pressing 1 time, adopt rubber tire to press again then 2 times, adopt steel wheel final pressure at last 1 time, the temperature that paves is 170 ℃, and rolling temperature is 120 ℃, make surface layer 3 in the high anti-rut, the thickness of surface layer 3 is 4cm in the high anti-rut;
5) laying of waterproof, grease proofing, tack coat:
The temperature for the treatment of surface layer in the high anti-rut is reduced under 30 ℃ the situation, with 160 ℃ of fire-retardant high-viscosity modified asphalt heating, the pitch that employing has powerful bedroom mixing plant spreads the shop of spreading that the shop car carries out fire-retardant high-viscosity modified asphalt, and the shop amount of spilling of fire-retardant high-viscosity modified asphalt is 1.0kg/m
2The rubble material is heated to 120 ℃, spreads the shop at fire-retardant high-viscosity modified asphalt and adopt after finishing rubble to spread the shop car immediately the rubble material is spread the shop, the shop amount of spilling of rubble material is 6kg/m
2Adopt steel roller to roll at last 3 times, waterproof when it rolls, temperature grease proofing, tack coat should be at 120 ℃; Mat formation finish after, form waterproof, grease proofing, tack coat 4, waterproof, thickness grease proofing, tack coat 4 are 0.5cm;
Described rubble material is a basalt, and particle diameter is 9.5mm～4.75mm;
6) mating formation of fire prevention, noise reduction, antiskid upper layer:
The match ratio design of a. fire prevention, noise reduction, antiskid upper layer material
Fire prevention, noise reduction, antiskid supercrust material are by coarse aggregate, fine aggregate, fire-retardant high-viscosity modified asphalt, fire-retardant breeze and fibrous, coarse aggregate: fine aggregate: fire-retardant high-viscosity modified asphalt: fire-retardant breeze: quality of fiber is than=100: 10: 4: 2: 0.2, and its mineral aggregate gradation scope sees Table 8:
Table 8
Described coarse aggregate is a basalt;
Described fine aggregate is a limestone mechanism sand;
Described fiber is the organosolv lignin fiber;
Described fire-retardant breeze mainly is made up of magnesium hydroxide, aluminium hydroxide, magnesia and limestone dust, magnesium hydroxide: aluminium hydroxide: magnesia: the mass ratio of limestone dust=100: 50: 10: 50, the even mixing of magnesium hydroxide, aluminium hydroxide, magnesia and limestone dust is promptly obtained fire-retardant breeze;
The preparation of b. fire prevention, noise reduction, antiskid upper layer material and mating formation:
Add coarse aggregate, fine aggregate, fire-retardant breeze and fiber earlier and add mix pot mix 30s, add fire-retardant high-viscosity modified asphalt mix 60s subsequently, the temperature of mixing when stirring is 170 ℃, obtains fire prevention, noise reduction, antiskid upper layer material; After treating waterproof, grease proofing, the complete hardening by cooling of tack coat, use paver that fire prevention, noise reduction, antiskid upper layer material are paved on waterproof, grease proofing, the tack coat, adopt steel wheel compacting 3 times, the temperature that paves is 170 ℃, make fire prevention, noise reduction, antiskid upper layer 5, the thickness of fire prevention, noise reduction, antiskid upper layer 5 is 3cm.
Present embodiment is detected:
1) fire-retardant high-viscosity modified asphalt technical indicator:
A. oxygen index (OI) 〉=21;
B. horizontal firing index: reach that the I level is difficult burns;
C. needle penetration (25 ℃, 100g, 5s, 0.01mm): 45～75;
D. softening point 〉=90 ℃;
E. ductility (5cm/min, 5 ℃) 〉=40cm;
F.60 ℃ dynamic viscosity 〉=20000Pas;
The technical indicator of 2) fire prevention, noise reduction, antiskid upper layer:
A. void content 18%～22%;
B. construction depth 〉=1.5mm;
C. friction factor (BPN) 〉=65;
D. unit interval seepage rate 〉=1000ml/min;
E. noise: reducing noise than plain asphalt road surface is more than 4 decibels;
3) technical indicator of waterproof, grease proofing, tack coat:
A. pull strength 〉=0.6MPa;
B. shear strength 〉=1.0MPa;
C. unit interval seepage rate≤0.5ml/min;
4) technical indicator of surface layer in the high anti-rut:
A. dynamic stability 〉=6000 time/mm;
B. Marshall stability 〉=8.0KN;
C. the freeze thawing cleavage strength is than 〉=80%;
D. residual stability 〉=80% soaks.
Embodiment 4:
A kind of paving method of combination paving layer for tunnel road surface, it comprises the steps:
1) preparation of fire-retardant high-viscosity modified asphalt:
Fire-retardant high-viscosity modified asphalt is made up of styrene butadiene styrene block copolymer (SBS) (SBS), tackifier, bulking agent, stabilizing agent and anti-flaming smoke-inhibiting agent and matrix pitch, and each constituent mass is than being matrix pitch: styrene butadiene styrene block copolymer (SBS): tackifier: bulking agent: stabilizing agent: anti-flaming smoke-inhibiting agent=100: 15.3: 3.6: 18.7: 1.4: 12.5; Earlier matrix pitch fusing back is added styrene butadiene styrene block copolymer (SBS), stirring at low speed 15min under 170 ℃ of conditions, pass through high-speed shearing machine then, high-speed stirred 60min under 180 ℃ of conditions, rotating speed is 4000r/min, under 150 ℃ temperature condition, place 90min then, make its abundant swelling, add tackifier, bulking agent, stabilizing agent and anti-flaming smoke-inhibiting agent at last and under 180 ℃ of conditions, pass through high-speed shearing machine high-speed stirred 30min, rotating speed is 4000r/min, can make fire-retardant high-viscosity modified asphalt;
Described matrix pitch is selected bitumen A H-70 for use;
Described tackifier are selected terpene resin for use;
Described bulking agent is selected the pentaerythrite bulking agent for use;
Described stabilizing agent is selected sulphur class stabilizing agent for use; As carbon disulfide;
Described anti-flaming smoke-inhibiting agent is made up of decabromodiphenyl oxide, antimony oxide and aluminium hydroxide; Press decabromodiphenyl oxide: antimony oxide: the mass ratio of aluminium hydroxide=100: 50: 75, choose decabromodiphenyl oxide, antimony oxide and aluminium hydroxide, the evenly mixed anti-flaming smoke-inhibiting agent that gets;
2) surface of tunnel road surface layer of concrete 1 is cleaned;
3) spreading of bottom surface tack coat: utilize pitch to spread the shop car on the tunnel road surface layer of concrete 1 that finishes to spread the shop modified emulsifying asphalt cleaning, the shop amount of spilling of modified emulsifying asphalt is 1.0kg/m
2, obtain bottom surface tack coat 2;
Described modified emulsifying asphalt (as: modified emulsifying asphalt that Guangdong Luxiang Co., Ltd. produces);
4) the mating formation of surface layer in the high anti-rut:
A. the match ratio of surface layer bituminous mixture design in the high anti-rut:
The surface layer bituminous mixture is made up of coarse aggregate, fine aggregate, matrix pitch, breeze and anti-rut agent in the high anti-rut, coarse aggregate: fine aggregate: matrix pitch: breeze: the mass ratio of anti-rut agent=100: 120: 4: 3: 0.5, its mineral aggregate gradation scope saw Table 9:
Table 9
Described coarse aggregate is a diabase;
Described fine aggregate is a basalt mechanism sand;
Described breeze is a limestone dust;
Described matrix pitch is the AH-70 matrix pitch;
Described anti-rut agent is made up of regeneration low density polyethylene (LDPE), Petropols, activating rubber powder, regeneration low density polyethylene (LDPE): Petropols: the mass ratio of activating rubber powder=100: 20: 15, to regenerate after low density polyethylene (LDPE), Petropols, activating rubber powder mix in proportion at normal temperatures, drop into double screw extruder, 160 ℃ of start blending temperature controls, mixture is cooled to normal temperature and promptly gets anti-rut agent through the extruder extruding pelletization;
B. the preparation of surface layer bituminous mixture and mating formation in the high anti-rut:
Add coarse aggregate, fine aggregate, breeze and anti-rut agent earlier and add mix pot mix 90s (second), add matrix pitch mix 90s subsequently, the temperature of mixing when stirring is 190 ℃, obtains surface layer bituminous mixture in the high anti-rut; After treating the complete breakdown of emulsion of modified emulsifying asphalt of bottom surface tack coat 2, use paver with surface layer bituminous mixture laying in the anti-rut of height to bottom surface tack coat 2, adopt steel wheel first pressing 2 times, adopt rubber tire to press again then 3 times, adopt steel wheel final pressure at last 2 times, the temperature that paves is 190 ℃, and rolling temperature is 140 ℃, make surface layer 3 in the high anti-rut, the thickness of surface layer 3 is 6cm in the high anti-rut;
5) laying of waterproof, grease proofing, tack coat:
The temperature for the treatment of surface layer in the high anti-rut is reduced under the situation below 50 ℃, with 180 ℃ of fire-retardant high-viscosity modified asphalt heating, the pitch that employing has powerful bedroom mixing plant spreads the shop of spreading that the shop car carries out fire-retardant high-viscosity modified asphalt, and the shop amount of spilling of fire-retardant high-viscosity modified asphalt is 1.5kg/m
2The rubble material is heated to 140 ℃, spreads the shop at fire-retardant high-viscosity modified asphalt and adopt after finishing rubble to spread the shop car immediately the rubble material is spread the shop, the shop amount of spilling of rubble material is 10kg/m
2Adopt steel roller to roll at last 5 times, waterproof when it rolls, temperature grease proofing, tack coat should be at 160 ℃; Mat formation finish after, form waterproof, grease proofing, tack coat 4, waterproof, thickness grease proofing, tack coat 4 are 1cm;
The described rubble material of step 5) is the diabase rubble, and particle diameter is 9.5mm～4.75mm;
6) mating formation of fire prevention, noise reduction, antiskid upper layer:
The match ratio design of a. fire prevention, noise reduction, antiskid upper layer material
Fire prevention, noise reduction, antiskid supercrust material are by coarse aggregate, fine aggregate, fire-retardant high-viscosity modified asphalt, fire-retardant breeze and fibrous, coarse aggregate: fine aggregate: fire-retardant high-viscosity modified asphalt: fire-retardant breeze: quality of fiber is than=100: 30: 6: 4: 0.5, and its mineral aggregate gradation scope sees Table 10:
Table 10
Described coarse aggregate is a diabase;
Described fine aggregate is a basalt mechanism sand;
Described fiber is an inorganic mineral fiber;
Described fire-retardant breeze mainly is made up of magnesium hydroxide, aluminium hydroxide, magnesia and limestone dust, magnesium hydroxide: aluminium hydroxide: magnesia: the mass ratio of limestone dust=100: 40: 20: 30, the even mixing of magnesium hydroxide, aluminium hydroxide, magnesia and limestone dust is promptly obtained fire-retardant breeze;
The preparation of b. fire prevention, noise reduction, antiskid upper layer material and mating formation:
Add coarse aggregate, fine aggregate, fire-retardant breeze and fiber earlier and add mix pot mix 90s, add fire-retardant high-viscosity modified asphalt mix 90s subsequently, the temperature of mixing when stirring is 190 ℃, obtains fire prevention, noise reduction, antiskid upper layer material; After treating waterproof, grease proofing, the complete hardening by cooling of tack coat, use paver that fire prevention, noise reduction, antiskid upper layer material are paved on waterproof, grease proofing, the tack coat, adopt steel wheel compacting 5 times, the temperature that paves is 190 ℃, make fire prevention, noise reduction, antiskid upper layer 5, the thickness of fire prevention, noise reduction, antiskid upper layer 5 is 5cm.
Present embodiment is detected:
1) fire-retardant high-viscosity modified asphalt technical indicator:
A. oxygen index (OI) 〉=21;
B. horizontal firing index: reach that the I level is difficult burns;
C. needle penetration (25 ℃, 100g, 5s, 0.01mm): 45～75;
D. softening point 〉=90 ℃;
E. ductility (5cm/min, 5 ℃) 〉=40cm;
F.60 ℃ dynamic viscosity 〉=20000Pas;
The technical indicator of 2) fire prevention, noise reduction, antiskid upper layer:
A. void content 18%～22%;
B. construction depth 〉=1.5mm;
C. friction factor (BPN) 〉=65;
D. unit interval seepage rate 〉=1000ml/min;
E. noise: reducing noise than plain asphalt road surface is more than 4 decibels;
3) technical indicator of waterproof, grease proofing, tack coat:
A. pull strength 〉=0.6MPa;
B. shear strength 〉=1.0MPa;
C. unit interval seepage rate≤0.5ml/min;
4) technical indicator of surface layer in the high anti-rut:
A. dynamic stability 〉=6000 time/mm;
B. Marshall stability 〉=8.0KN;
C. the freeze thawing cleavage strength is than 〉=80%;
D. residual stability 〉=80% soaks.
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 paving method of a combination paving layer for tunnel road surface is characterized in that it comprises the steps:
1) preparation of fire-retardant high-viscosity modified asphalt:
Fire-retardant high-viscosity modified asphalt is made up of styrene butadiene styrene block copolymer (SBS), tackifier, bulking agent, stabilizing agent, anti-flaming smoke-inhibiting agent and matrix pitch, and each constituent mass is than being matrix pitch: styrene butadiene styrene block copolymer (SBS): tackifier: bulking agent: stabilizing agent: anti-flaming smoke-inhibiting agent=100: (5.2～15.3): (1.0～3.6): (5.0～18.7): (0.2～1.4): (6.5～12.5); Earlier matrix pitch fusing back is added styrene butadiene styrene block copolymer (SBS), stirring at low speed 10～15min under 150～170 ℃ of conditions, pass through high-speed shearing machine then, high-speed stirred 45～60min under 160～180 ℃ of conditions, rotating speed is 3000～4000r/min, under 140～150 ℃ temperature condition, place 60～90min then, make its abundant swelling, add tackifier at last, bulking agent, stabilizing agent and anti-flaming smoke-inhibiting agent pass through high-speed shearing machine high-speed stirred 15～30min under 160～180 ℃ of conditions, rotating speed is 3000～4000r/min, can make fire-retardant high-viscosity modified asphalt;
Described matrix pitch is selected bitumen A H-70 for use;
Described tackifier are selected Petropols or terpene resin for use;
Described bulking agent selects 2 for use, 3-dihydrofuran or pentaerythrite bulking agent;
Described stabilizing agent is selected polyamide-based stabilizing agent or sulphur class stabilizing agent for use;
Described anti-flaming smoke-inhibiting agent is made up of decabromodiphenyl oxide, antimony oxide and aluminium hydroxide; Press decabromodiphenyl oxide: antimony oxide: the mass ratio of aluminium hydroxide=100: (5～50): (50～75), choose decabromodiphenyl oxide, antimony oxide and aluminium hydroxide, the evenly mixed anti-flaming smoke-inhibiting agent that gets;
2) surface of tunnel road surface layer of concrete is cleaned;
3) spreading of bottom surface tack coat: utilize pitch to spread the shop car on the tunnel road surface layer of concrete that finishes to spread the shop modified emulsifying asphalt cleaning, the shop amount of spilling of modified emulsifying asphalt is 0.8～1.0kg/m
2, obtain the bottom surface tack coat;
4) the mating formation of surface layer in the high anti-rut:
A. the match ratio of surface layer bituminous mixture design in the high anti-rut:
The surface layer bituminous mixture is made up of coarse aggregate, fine aggregate, matrix pitch, breeze and anti-rut agent in the high anti-rut, coarse aggregate: fine aggregate: matrix pitch: breeze: the mass ratio of anti-rut agent=100: (80～120): (2～4): (1～3): (0.2～0.5), its mineral aggregate gradation scope sees Table 1:
Table 1
Described anti-rut agent is made up of regeneration low density polyethylene (LDPE), Petropols, activating rubber powder, regeneration low density polyethylene (LDPE): Petropols: the mass ratio of activating rubber powder=100: (20～40): (0～15), to regenerate after low density polyethylene (LDPE), Petropols, activating rubber powder mix in proportion at normal temperatures, drop into double screw extruder, 140～160 ℃ of start blending temperature controls, mixture is cooled to normal temperature and promptly gets anti-rut agent through the extruder extruding pelletization;
B. the preparation of surface layer bituminous mixture and mating formation in the high anti-rut:
Add coarse aggregate, fine aggregate, breeze and anti-rut agent earlier and add mix pot mix 30～90s, add matrix pitch mix 60～90s subsequently, the temperature of mixing when stirring is 170～190 ℃, obtains surface layer bituminous mixture in the high anti-rut; After treating the complete breakdown of emulsion of modified emulsifying asphalt of bottom surface tack coat, use paver with surface layer bituminous mixture laying in the anti-rut of height to the tack coat of bottom surface, adopt steel wheel first pressing 1～2 time, adopt rubber tire to press again then 2～3 times, adopt steel wheel final pressure at last 1～2 time, the temperature that paves is not less than 170 ℃, rolls temperature and must not be lower than 120 ℃, make surface layer in the high anti-rut, the thickness of surface layer is 4～6cm in the high anti-rut;
5) laying of waterproof, grease proofing, tack coat:
The temperature for the treatment of surface layer in the high anti-rut is reduced under the situation below 50 ℃, with 160～180 ℃ of fire-retardant high-viscosity modified asphalt heating, the pitch that employing has a powerful bedroom mixing plant spreads the shop of spreading that the shop car carries out fire-retardant high-viscosity modified asphalt, fire-retardant high-viscosity modified asphalt to spill the shop amount be 1.0～1.5kg/m
2The rubble material is heated to 120～140 ℃, spreads the shop at fire-retardant high-viscosity modified asphalt and adopt after finishing rubble to spread the shop car immediately the rubble material is spread the shop, the rubble material to spill the shop amount be 6～10kg/m
2Adopt steel roller to roll at last 3～5 times, waterproof when it rolls, temperature grease proofing, tack coat should be at 120～160 ℃; Mat formation finish after, form waterproof, grease proofing, tack coat, waterproof, thickness grease proofing, tack coat are 0.5～1cm;
6) mating formation of fire prevention, noise reduction, antiskid upper layer:
The match ratio design of a. fire prevention, noise reduction, antiskid upper layer material
Fire prevention, noise reduction, antiskid upper layer material are by coarse aggregate, fine aggregate, fire-retardant high-viscosity modified asphalt, fire-retardant breeze and fibrous, coarse aggregate: fine aggregate: fire-retardant high-viscosity modified asphalt: fire-retardant breeze: quality of fiber is than=100: (10～30): (4～6): (2～4): (0.2～0.5), and its mineral aggregate gradation scope sees Table 2:
Table 2
Described fire-retardant breeze mainly is made up of magnesium hydroxide, aluminium hydroxide, magnesia and limestone dust, magnesium hydroxide: aluminium hydroxide: magnesia: the mass ratio of limestone dust=100: (30～50): (10～20): (30～50) promptly obtain fire-retardant breeze with the even mixing of magnesium hydroxide, aluminium hydroxide, magnesia and limestone dust;
The preparation of b. fire prevention, noise reduction, antiskid upper layer material and mating formation:
Add coarse aggregate, fine aggregate, fire-retardant breeze and fiber earlier and add mix pot mix 30～90s, add fire-retardant high-viscosity modified asphalt mix 60～90s subsequently, the temperature of mixing when stirring is 170～190 ℃, obtains fire prevention, noise reduction, antiskid upper layer material; After treating waterproof, grease proofing, the complete hardening by cooling of tack coat, use paver that fire prevention, noise reduction, antiskid upper layer material are paved on waterproof, grease proofing, the tack coat, adopt steel wheel compacting 3～5 times, the temperature that paves is not less than 170 ℃, make fire prevention, noise reduction, antiskid upper layer, the thickness of fire prevention, noise reduction, antiskid upper layer is 3～5cm.
2. the paving method of a kind of combination paving layer for tunnel road surface according to claim 1 is characterized in that; Step 4), the described coarse aggregate of step 6) are limestone, basalt or diabase.
3. the paving method of a kind of combination paving layer for tunnel road surface according to claim 1 is characterized in that; Step 4), the described fine aggregate of step 6) are limestone mechanism sand or basalt mechanism sand.
4. the paving method of a kind of combination paving layer for tunnel road surface according to claim 1 is characterized in that; The described breeze of step 4) is a limestone dust.
5. the paving method of a kind of combination paving layer for tunnel road surface according to claim 1 is characterized in that; The described matrix pitch of step 4) is the AH-70 matrix pitch.
6. the paving method of a kind of combination paving layer for tunnel road surface according to claim 1 is characterized in that; The described rubble material of step 5) is basalt or diabase rubble, and particle diameter is 9.5mm～4.75mm.
7. the paving method of a kind of combination paving layer for tunnel road surface according to claim 1 is characterized in that; The described fiber of step 6) is organosolv lignin fiber or inorganic mineral fiber.
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2009
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110512483A (en) * | 2019-08-23 | 2019-11-29 | 广东五华二建工程有限公司 | Pavement construction method |
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