JP7285422B1 - Top layer composite material for composite surface layer of tunnel and its manufacturing method - Google Patents

Abstract

As weight percent, 4 to 7 parts of SBS modified asphalt, 70 to 90 parts of coarse aggregate, 10 to 15 parts of fine aggregate, 6 to 10 parts of ore powder, 1 to 3 parts of cement, and 0 composite fiber .2 to 0.5 parts, 8 to 12 parts flame retardant, 0.5 to 1 part anti-stripping agent, and 0.3 to 0.6 parts surfactant in the composite surface layer of the tunnel. Composite material and its manufacturing method. The upper layer compound in the composite surface layer of the tunnel of the present invention is an asphalt compound, which has better compatibility between the raw materials in the asphalt compound of the present invention, is easier to disperse, and has better flame retardant performance. but also has better road performance, effectively prolonging the service life of the road.
[Selection figure] None

Description

TECHNICAL FIELD The present invention belongs to the technical field of asphalt mixture, and specifically relates to a top layer mixture in a composite surface layer of a tunnel and a method for manufacturing the same.

With the development of high-class roads in our country, the number of road tunnels is increasing. Each class of road tunnel adopts cement concrete road surface. Optoelectronic lighting can be used and an asphalt surface layer structure with good light reflection properties can be adopted. At present, the use of flame-retardant asphalt road pavement, which has excellent slip resistance, low noise, and is comfortable to drive, has already become a trend of development. However, in the actual application process, the asphalt mixture cannot achieve both good flame retardant performance and road surface performance.

Therefore, there is a need to provide an improved technical solution to the deficiencies of the prior art.

The object of the present invention is to provide a top layer compound in the composite surface layer of tunnel and its manufacturing method, which has good flame retardant performance and road surface properties in the application of the conventional top layer compound in the composite surface layer of tunnel. To solve the problem of incompatibility of performance.

In order to achieve the above objects, the present invention provides the following technical solutions.

A top layer composite in a composite surface layer of a tunnel,
As weight percent, 4 to 7 parts of SBS modified asphalt, 70 to 90 parts of coarse aggregate, 10 to 15 parts of fine aggregate, 6 to 10 parts of ore powder, 1 to 3 parts of cement, and 0 composite fiber .2 to 0.5 parts, 8 to 12 parts flame retardant, 0.5 to 1 part anti-stripping agent, and 0.3 to 0.6 parts surfactant,
The flame retardant comprises nano aluminum hydroxide, a hydrotalcite compound, silica, and a silane coupling agent, provided that nano aluminum hydroxide, a hydrotalcite compound, silica, and a silane coupling The mass ratio with the agent is (10-15): 2: 1: 1,
The top layer compound in the composite surface layer of the tunnel, wherein the composite fiber comprises mineral fiber and polyimide fiber, wherein the mass ratio of mineral fiber and polyimide fiber is 1:1 to 1.5:1.

The present invention further provides a method for manufacturing the top layer compound in the composite surface layer of the tunnel, the manufacturing method comprising:
Step 1 of weighing coarse aggregate and fine aggregate according to the compounding ratio, heating and stirring and mixing to obtain a first mixture;
Step 2 of weighing the SBS modified asphalt according to the compounding ratio and heating to obtain thermally modified asphalt;
Step 3 of weighing ore powder, cement, composite fiber, flame retardant and surfactant according to the compounding ratio and stirring and mixing to obtain a second mixture;
First, the first mixture obtained in step 1 and the second mixture obtained in step 3 are stirred and mixed to obtain a third mixture, and then the thermally modified asphalt obtained in step 2 is added to the third mixture. into the mixture of and continue to stir and mix and keep warm to obtain a top layer compound in the composite surface layer of the tunnel (step 4).

[beneficial effect]
The upper layer compound in the composite surface layer of the tunnel of the present invention is an asphalt compound, which has better compatibility between the raw materials in the asphalt compound of the present invention, is easier to disperse, and has better flame retardant performance. but also has better road performance, effectively prolonging the service life of the road. However, ore powder and cement are used as fillers, and there is no need to add water-reducing agents, and each technical requirement for composite materials can be met. Composite fibers, flame retardants, anti-stripping agents and surfactants can ensure that the composite has good anti-slip performance, flame retardant fire performance, durability performance, dispersion performance and mechanical performance.

The present invention provides a top layer composite material for tunnel composite surface layers, in response to the problem that good flame retardant performance and road surface performance cannot be achieved in the conventional application of top layer composite materials for tunnel composite surface layers. However, the mixture of the present invention is an asphalt mixture, which not only has better compatibility between the raw materials in the asphalt mixture, is easier to disperse, and has better flame retardant performance, but also has better It has good road performance and effectively extends the service life of the road surface.

The top layer mix in the composite face layer of the tunnel is 4 to 7 parts by weight of SBS modified asphalt (e.g. 4 parts, 5 parts, 6 parts, 7 parts and any interval value between any two endpoints) , coarse aggregate 70 to 90 parts (eg, 70 parts, 75 parts, 80 parts, 85 parts, 90 parts and the interval value between any two endpoints) and fine aggregate 10 to 15 parts (eg, 10 parts parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts and the interval value between any two endpoints) and 6 to 10 parts (for example, 6 parts, 7 parts, 8 parts, 9 parts) , 10 parts and the interval value between any two endpoints), 1-3 parts cement (eg, 1 part, 2 parts, 3 parts and the interval value between any two endpoints), and bicomponent fiber 0.2 to 0.5 parts (such as 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts and any interval value between two endpoints) and 8 to 12 parts flame retardant (e.g. 8 parts, 9 parts, 10 parts, 11 parts, 12 parts and interval values between any two endpoints) and 0.5 to 1 part anti-stripping agent (e.g. 0.5 parts, 0.6 parts) parts, 0.7 parts, 0.8 parts, 0.9 parts, 1.0 parts and any interval value between the two endpoints) and 0.3 to 0.6 parts surfactant (for example, 0 .3 parts, 0.4 parts, 0.5 parts, 0.6 parts and interval values between any two endpoints).

In the asphalt mixture of the present invention, ore powder and cement are used as fillers, and each technical requirement of the mixture can be satisfied without adding a water reducing agent. Composite fibers, flame retardants, anti-stripping agents and surfactants can ensure that the composite has good anti-slip performance, flame retardant fire performance, durability performance, dispersion performance and mechanical performance. Asphalt paste, which is formed by stirring and mixing ore powder and asphalt, provides good adhesion between skeletons of asphalt mixture and plays an important role for asphalt mixture.

In the asphalt mixture of the present invention, the technical index of SBS modified asphalt should meet the technical requirements of SBS (ID) type modified asphalt in Table 1 and meet the technical index requirements of PG76-10.

In the asphalt mixture of the present invention, crushed stone with a graded distribution of coarse aggregate is adopted so as to ensure that it has a good adhesion ability with asphalt, that is, the coarse aggregate has a particle size of 11-15 mm. Crushed stone, crushed stone with a particle size of 6-11 mm, and crushed stone with a particle size of 3-6 mm, with the proviso that crushed stone with a particle size of 11-15 mm, crushed stone with a particle size of 6-11 mm, and crushed stone with a particle size of 3-6 mm is (35-40):(30-34):(5-9), for example, the mass ratio is 35:30:5, 38:32:7, 38:33:8, 40: 34:9.

In the asphalt mixture of the present invention, the fine aggregate is manufactured sand, and the grain size of the crushed sand is 3 mm or less. Preferably, the grain size of the crushed sand is 2.36 mm or less. The crushed sand is preferably alkaline stone crushed sand, so as to ensure that the fine aggregate and asphalt have good bonding ability, and its quality technology meets the quality technology requirements in Table 2.

In the asphalt mixture of the present invention, the ore powder can be an ore powder obtained by pulverizing a hydrophobic stone material such as a strong polar rock in limestone or lysolith. should meet the quality and technical requirements of

In the asphalt mixture of the present invention, the flame retardant contains nano aluminum hydroxide, a hydrotalcite compound, silica, and a silane coupling agent, provided that the nano aluminum hydroxide and the hydrotalcite compound , the mass ratio of silica to the silane coupling agent is (10-15):2:1:1 (for example, 10:2:1:1, 11:2:1:1, 12:2:1: 1, 13:2:1:1, 14:2:1:1, 15:2:1:1 and interval values between any two endpoints). However, nano aluminum hydroxide has quantum size effect and surface effect, can strengthen interfacial action, improve compatibility between inorganics and polymer substrates, and plays a dominant role in flame retardant effect. Optionally, the particle size of the nano aluminum hydroxide is 30-60 nm (eg, 30 nm, 40 nm, 50 nm, 60 nm and interval values between any two endpoints). The flame-retardant mechanism of hydrotalcite-based compounds is gas-phase flame-retardant, and the rare gas produced by pyrolysis can play multiple functions such as heat absorption, dilution, and shielding. The addition of silica can enhance the smoke suppression effect of the flame retardant and have a certain filling dispersion effect. By adding a silane coupling agent, the interface effect between each component can be improved, and the dispersibility and adhesiveness between each component can be improved. The flame retardant of the present invention has good compatibility with each raw material in the composite material, is easy to disperse, can improve the flame retardant effect of the composite material, and can ensure good road performance.

In the asphalt mixture of the present invention, the composite fibers contain mineral fibers and polyimide fibers, provided that the mass ratio of mineral fibers and polyimide fibers is 1:1 to 1.5:1 (for example, 1:1, 1 .1:1, 1.2:1, 1.3:1, 1.4:1, 1.5:1 and interval values between any two endpoints).

However, the mineral fiber can be basalt fiber and wood fiber, basalt fiber has a tight crystal structure, good surface wettability, and a tight structure with other raw materials such as asphalt, cement, etc. have. Moreover, basalt fiber has a relatively high elastic modulus and a suitable elongation at break, which helps improve the elastic deformation recovery ability of asphalt concrete. Wood fiber is an organic fiber processed from natural wood. After adding it, it improves the oil stability and adsorption of asphalt mixture, thereby improving the construction quality and durability of the asphalt road surface. The main chain of polyimide in polyimide fiber contains a large amount of aryl groups, and aromatic structural carbon can be condensed and synthesized during combustion. and polyimide fibers have relatively good dispersibility and can be better dispersed between asphalt, ore powder and other raw materials. At the same time, polyimide fiber has a good adsorption effect, can adsorb asphalt after adding, increase the amount of asphalt used, thicken the structural asphalt film on the surface of the aggregate, so that the road surface of the asphalt mixture improve performance. In addition, the polyimide fiber can increase the adhesiveness between the asphalt and the aggregate, improve the viscosity of the asphalt mixture, and reinforce the adhesion between the aggregates.

Optionally, the length of the polyimide fiber is 3-6 mm (eg, 3 mm, 4 mm, 5 mm, 6 mm and interval values between any two endpoints).

The addition of composite fiber can increase the strength and fatigue resistance of the road surface obtained after construction of the composite material, and the fiber surface can well adsorb asphalt, thereby preventing asphalt elution. At the same time, the composite fiber effectively suppresses the aggregate dispersion problem in the raw material, fills the skeleton space without reducing the porosity, does not affect the strength of the asphalt mixture, and improves its high temperature resistance performance. . The life of the asphalt road surface to which the composite fiber is added is two to three times longer than that of the asphalt road surface to which the composite fiber is not added.

In the asphalt mixture of the present invention, the anti-stripping agent is aluminum stearate.

In the asphalt mixture of the present invention, the surfactant includes one or more of alkyl carboxylate anionic surfactants, alkyl sulfate anionic surfactants, and alkyl sulfonate anionic surfactants. It is a mixture. Surfactants can improve the compaction of asphalt mixes, reduce aging, and improve multiple functions of adhesion.

In addition, the top layer compound in the composite surface layer of the tunnel contains 0.1 to 0.3 parts anti-aging agent (e.g., 0.1 parts, 0.2 parts, 0.3 parts and between any two endpoints). 0.1 to 0.3 parts stabilizer (eg 0.1 parts, 0.2 parts, 0.3 parts and any interval value between any two endpoints). Addition of an anti-aging agent can effectively improve the wear resistance and durability of the composite material. Addition of a stabilizer makes the composite material have excellent weather resistance and tensile resistance, and stabilizes the product quality.

In an optional embodiment of the invention, the antioxidant comprises a mixture of silicone rubber, isoprene rubber, and butadiene rubber, provided that the weight ratio of silicone rubber, isoprene rubber, and butadiene rubber is (1-1.5):1:1 (e.g. 1:1:1, 1.2:1:1, 1.3:1:1, 1.5:1:1 and any two endpoints interval value). The anti-aging agent of this embodiment has a cross-linking action and tightly bonds each component in the composite material, thereby improving the tensile strength, tear strength and wear resistance of the asphalt composite material. The wear resistance of the top layer is made stronger and the durability is improved.

In an optional embodiment of the invention, the stabilizer comprises a mixture of sodium silicate and styrene-butadiene-styrene block copolymer, provided that the weight ratio of sodium silicate to styrene-butadiene-styrene block copolymer is 1:1. ~1:1.5 (e.g. 1:1, 1:1.2, 1:1.3, 1:1.4, 1:1.5 and interval values between any two endpoints) .

The asphalt-aggregate ratio of the top layer composite material in the composite surface layer of the tunnel of the present invention is 5.5 to 6.5% (for example, 5.5%, 5.7%, 6.2%, 6.5% and the interval value between any two endpoints). Here, the asphalt aggregate ratio is the mass percentage of SBS-modified asphalt and ore (including coarse aggregate, fine aggregate, and ore powder).

The present invention further provides a method for manufacturing the top layer compound in the composite surface layer of the tunnel, the manufacturing method comprising:
In step 1, coarse aggregate and fine aggregate are weighed according to the compounding ratio, heated, stirred and mixed to obtain a first mixture, and the heating temperature in step 1 is 190 to 200 ° C. 192° C., 194° C., 196° C., 198° C., 200° C. and interval values between any two endpoints);
In step 2, the SBS modified asphalt is weighed according to the compounding ratio and heated to obtain thermally modified asphalt. °C, 178°C, 180°C and the interval value between any two endpoints);
Step 3 of weighing ore powder, cement, composite fiber, flame retardant and surfactant according to the compounding ratio and stirring and mixing to obtain a second mixture;
First, the first mixture obtained in step 1 and the second mixture obtained in step 3 are stirred and mixed to obtain a third mixture, and then the thermally modified asphalt obtained in step 2 is added to the third mixture. into the mixture of and continue to stir and mix and keep warm to obtain a top layer compound in the composite surface layer of the tunnel (step 4). The incubation temperature in step 4 is 170-185° C. (eg 170° C., 175° C., 180° C., 185° C. and interval values between any two endpoints).

Additionally, the second mixture of step 3 further includes an anti-aging agent and a stabilizer.

Hereinafter, the method for manufacturing the top layer compound material in the composite surface layer of the tunnel of the present invention will be described in detail with reference to specific examples.

[Example 1]
The upper surface layer mixture in the composite surface layer of the tunnel of this embodiment is composed of 6 parts by weight of SBS modified asphalt, 70 parts of coarse aggregate, 15 parts of fine aggregate, 8 parts of ore powder, and 2 parts by weight of cement. 0.2 parts composite fiber, 10 parts flame retardant, 0.5 parts anti-stripping agent, 0.3 parts surfactant, 0.1 part anti-aging agent, and 0.2 parts stabilizer including. However, the coarse aggregate includes crushed stone with a particle size of 11-15 mm, crushed stone with a particle size of 6-11 mm, and crushed stone with a particle size of 3-6 mm, provided that crushed stone with a particle size of 11-15 mm and crushed stone with a particle size of 6-11 mm The mass ratio of the crushed stone with a particle size and the crushed stone with a particle size of 3 to 6 mm is 37:30:7, and the flame retardant is nano aluminum hydroxide, a hydrotalcite compound, silica, and a silane coupling agent. with the proviso that the mass ratio of nano-aluminum hydroxide, hydrotalcite compound, silica, and silane coupling agent is 10:2:1:1, and the composite fibers are mineral fibers and polyimide fibers wherein the mass ratio of mineral fiber to polyimide fiber is 1:1, the anti-stripping agent is aluminum stearate, the surfactant is an alkyl carboxylate anionic surfactant, anti-aging The agent is a mixture of silicone rubber, isoprene rubber, and butadiene rubber, provided that the mass ratio of silicone rubber, isoprene rubber, and butadiene rubber is 1:1:1, and the stabilizer is , a mixture of sodium silicate and styrene-butadiene-styrene block copolymer, provided that the mass ratio of sodium silicate and styrene-butadiene-styrene block copolymer is 1:1.5, and the asphalt aggregate ratio of the mixture is 6.5%.

The method for manufacturing the top layer compound material in the composite surface layer of the tunnel of this embodiment includes:
step (1) of weighing coarse aggregate and fine aggregate according to the compounding ratio, heating and stirring and mixing (heating temperature is 190° C.) to obtain a first mixture;
Step (2) of weighing the SBS modified asphalt according to the compounding ratio and heating it (heating temperature is 190° C.) to obtain thermally modified asphalt;
step (3) of weighing ore powder, cement, composite fiber, flame retardant and surfactant according to the compounding ratio and stirring and mixing to obtain a second mixture;
First, the first mixture obtained in step (1) and the second mixture obtained in step (3) are stirred and mixed to obtain a third mixture, followed by the heating obtained in step (2) (4) adding the modified asphalt to the third mixture and continuing to stir and mix and heat at 170° C. to obtain a top layer composite in the composite surface layer of the tunnel.

[Example 2]
The upper surface layer mixture in the composite surface layer of the tunnel of this embodiment is composed of 6.5 parts by weight of SBS modified asphalt, 90 parts of coarse aggregate, 10 parts of fine aggregate, 6 parts of ore powder, 1 part cement, 0.5 parts composite fiber, 8 parts flame retardant, 1 part anti-stripping agent, 0.5 part surfactant, 0.3 part antioxidant, 0.1 part stabilizer including. However, the coarse aggregate includes crushed stone with a particle size of 11-15 mm, crushed stone with a particle size of 6-11 mm, and crushed stone with a particle size of 3-6 mm, provided that crushed stone with a particle size of 11-15 mm and crushed stone with a particle size of 6-11 mm The mass ratio of the crushed stone with a particle size and the crushed stone with a particle size of 3 to 6 mm is 38:32:7, and the flame retardant is nano aluminum hydroxide, a hydrotalcite compound, silica, and a silane coupling agent. However, the mass ratio of nano aluminum hydroxide, hydrotalcite compound, silica, and silane coupling agent is 15: 2: 1: 1, and the composite fiber is mineral fiber and polyimide fiber wherein the weight ratio of mineral fibers to polyimide fibers is 1.5:1, the anti-stripping agent is aluminum stearate, the surfactant is an alkyl carboxylate anionic surfactant, The anti-aging agent is a mixture of silicone rubber, isoprene rubber, and butadiene rubber, provided that the mass ratio of the silicone rubber, isoprene rubber, and butadiene rubber is 1:1:1. The agent is a mixture of sodium silicate and styrene-butadiene-styrene block copolymer, provided that the mass ratio of sodium silicate and styrene-butadiene-styrene block copolymer is 1:1, and the asphalt aggregate ratio of the mixture is 6.1%.

The method for manufacturing the top layer compound material in the composite surface layer of the tunnel of this embodiment includes:
step (1) of weighing coarse aggregate and fine aggregate according to the compounding ratio, heating and stirring and mixing (heating temperature is 195° C.) to obtain a first mixture;
Step (2) of weighing the SBS modified asphalt according to the compounding ratio and heating it (heating temperature is 180° C.) to obtain thermally modified asphalt;
step (3) of weighing ore powder, cement, composite fiber, flame retardant and surfactant according to the compounding ratio and stirring and mixing to obtain a second mixture;
First, the first mixture obtained in step (1) and the second mixture obtained in step (3) are stirred and mixed to obtain a third mixture, followed by the heating obtained in step (2) (4) adding the modified asphalt to the third mixture and continuing to stir and mix and heat at 170° C. to obtain a top layer composite in the composite surface layer of the tunnel.

[Example 3]
The upper surface layer mixture in the composite surface layer of the tunnel of this embodiment is composed of 5.5 parts by weight of SBS modified asphalt, 80 parts of coarse aggregate, 12 parts of fine aggregate, 8 parts of ore powder, 3 parts cement, 0.4 parts composite fiber, 12 parts flame retardant, 0.7 parts anti-stripping agent, 0.6 parts surfactant, 0.2 parts anti-aging agent, 0.3 parts stabilizer including the part. However, the coarse aggregate includes crushed stone with a particle size of 11-15 mm, crushed stone with a particle size of 6-11 mm, and crushed stone with a particle size of 3-6 mm, provided that crushed stone with a particle size of 11-15 mm and crushed stone with a particle size of 6-11 mm The mass ratio of the crushed stone with a particle size and the crushed stone with a particle size of 3 to 6 mm is 40:34:9, and the flame retardant is nano aluminum hydroxide, a hydrotalcite compound, silica, and a silane coupling agent. with the proviso that the mass ratio of nano aluminum hydroxide, hydrotalcite compound, silica, and silane coupling agent is 12:2:1:1, and the composite fiber is mineral fiber and polyimide fiber wherein the weight ratio of mineral fibers to polyimide fibers is 1.3:1, the anti-stripping agent is aluminum stearate, the surfactant is an alkyl carboxylate anionic surfactant, The anti-aging agent is a mixture of silicone rubber, isoprene rubber, and butadiene rubber, provided that the mass ratio of the silicone rubber, isoprene rubber, and butadiene rubber is 1:1:1. The agent is a mixture of sodium silicate and styrene-butadiene-styrene block copolymer, provided that the mass ratio of sodium silicate and styrene-butadiene-styrene block copolymer is 1:1.1, and the asphalt aggregate of the mixture The ratio is 5.5%.

The method for manufacturing the top layer compound material in the composite surface layer of the tunnel of this embodiment includes:
Step (1) of weighing coarse aggregate and fine aggregate according to the compounding ratio, heating and stirring and mixing (heating temperature is 200° C.) to obtain a first mixture;
Step (2) of weighing the SBS modified asphalt according to the compounding ratio and heating it (heating temperature is 170° C.) to obtain thermally modified asphalt;
step (3) of weighing ore powder, cement, composite fiber, flame retardant and surfactant according to the compounding ratio and stirring and mixing to obtain a second mixture;
First, the first mixture obtained in step (1) and the second mixture obtained in step (3) are stirred and mixed to obtain a third mixture, followed by the heating obtained in step (2) (4) adding the modified asphalt to the third mixture and continuing to stir and mix and incubate at 185° C. to obtain a top layer mix in the composite surface layer of the tunnel.

[Comparative Example 1]
The difference between this comparative example and Example 1 is that in the raw material of the composite material, only mineral fiber is used instead of polyimide fiber, and the other raw materials and manufacturing methods are the same as those in Example 1. is.

[Comparative Example 2]
The difference between this comparative example and Example 1 is that the mixture employs a commercially available flame-retardant asphalt.

Water immersion Marshall test, wheel tracking test, freeze-thaw test, fire resistance performance and smoke suppression performance for the top layer composite material in the composite surface layer of the tunnel manufactured in Examples 1 to 3 and Comparative Examples 1 and 2, respectively , and the test results are shown in Table 4.

As can be seen from the performance data in Table 4, compared to Comparative Examples 1 and 2, the top layer composite material in the composite surface layer of the tunnel manufactured in Examples 1 to 3 of the present invention has good flame retardancy and road surface performance. compatible with performance.

Claims (8)

A top layer composite in a composite surface layer of a tunnel,
As weight percent, 4 to 7 parts of SBS modified asphalt, 70 to 90 parts of coarse aggregate, 10 to 15 parts of fine aggregate, 6 to 10 parts of ore powder, 1 to 3 parts of cement, and 0 composite fiber .2 to 0.5 parts, 8 to 12 parts flame retardant, 0.5 to 1 part anti-stripping agent, and 0.3 to 0.6 parts surfactant,
The flame retardant comprises nano aluminum hydroxide, a hydrotalcite compound, silica, and a silane coupling agent, provided that nano aluminum hydroxide, a hydrotalcite compound, silica, and a silane coupling The mass ratio with the agent is (10-15): 2: 1: 1,
The composite fiber comprises mineral fiber and polyimide fiber, provided that the mass ratio of mineral fiber and polyimide fiber is 1:1 to 1.5:1.
A top layer compound in a composite surface layer of a tunnel characterized by: The coarse aggregate includes crushed stone with a particle size of 11 to 15 mm, crushed stone with a particle size of 6 to 11 mm, and crushed stone with a particle size of 3 to 6 mm, provided that crushed stone with a particle size of 11 to 15 mm and 6 to 11 mm grains The mass ratio of the crushed stone with a diameter of 3 to 6 mm and the crushed stone with a particle size of 3 to 6 mm is (35 to 40): (30 to 34): (5 to 9),
The fine aggregate is crushed sand, and the crushed sand has a particle size of 3 mm or less.
The upper surface layer composite material in the composite surface layer of the tunnel according to claim 1, characterized in that: the anti-stripping agent is aluminum stearate;
The surfactant is a mixture of one or more of alkyl carboxylate anionic surfactants, alkyl sulfate anionic surfactants, and alkyl sulfonate anionic surfactants. ,
The upper surface layer composite material in the composite surface layer of the tunnel according to claim 1, characterized in that: The top layer compound in the composite surface layer of the tunnel further comprises 0.1 to 0.3 parts of an antioxidant and 0.1 to 0.3 parts of a stabilizer.
The upper surface layer composite material in the composite surface layer of the tunnel according to any one of claims 1 to 3, characterized in that: The antioxidant is a mixture of silicone rubber, isoprene rubber, and butadiene rubber, provided that the mass ratio of silicone rubber, isoprene rubber, and butadiene rubber is (1 to 1.5). : 1:1 and
The stabilizer is a mixture of sodium silicate and styrene-butadiene-styrene block copolymer, wherein the weight ratio of sodium silicate and styrene-butadiene-styrene block copolymer is 1:1 to 1:1.5.
5. The top layer compound material in the composite surface layer of the tunnel according to claim 4, characterized in that: The asphalt aggregate ratio of the top layer composite material in the composite surface layer of the tunnel is 5.5 to 6.5%,
5. The top layer compound material in the composite surface layer of the tunnel according to claim 4, characterized in that: A method for manufacturing a top layer compound in the composite surface layer of the tunnel according to claim 1,
Step 1 of weighing coarse aggregate and fine aggregate according to the compounding ratio, heating and stirring and mixing to obtain a first mixture;
Step 2 of weighing the SBS modified asphalt according to the compounding ratio and heating to obtain thermally modified asphalt;
Step 3 of weighing ore powder, cement, composite fiber, flame retardant and surfactant according to the compounding ratio and stirring and mixing to obtain a second mixture;
First, the first mixture obtained in step 1 and the second mixture obtained in step 3 are stirred and mixed to obtain a third mixture, and then the thermally modified asphalt obtained in step 2 is added to the third mixture. and adding to the mixture of and continuing to stir and mix and keep warm to obtain a top layer composite in the composite face layer of the tunnel (4).
A method for manufacturing a top layer compound material in a composite surface layer of a tunnel, characterized by: The heating temperature in step 1 is 190 to 200°C, the heating temperature in step 2 is 170 to 180°C, and the heat retention temperature in step 4 is 170 to 185°C,
The second mixture of step 3 further comprises an anti-aging agent and a stabilizer.
8. The method of manufacturing the top layer compound material in the composite surface layer of the tunnel according to claim 7, characterized in that: