A recycled wood-flour asphalt concrete, a method for preparing the same, and an application thereof to a pedestrian landscape road

Abstract

The application discloses regenerated sawdust asphalt concrete, a preparation method thereof and application thereof in preparing a pedestrian landscape road, and belongs to the technical field of building materials. The preparation method is as follows: sawdust, recycled rubber particles, mineral powder and rubber powder asphalt are preheated, and then the preheated raw materials are mixed to prepare the regenerated sawdust asphalt concrete. In the application, the sawdust is used to replace the gravel in traditional concrete, and the recycled rubber particles and the mineral powder, which are industrial wastes, are used as raw materials to prepare the regenerated sawdust asphalt concrete. The regenerated sawdust asphalt concrete is used as a surface layer of the pedestrian landscape road, and in the meanwhile, the environment is protected, resource recycling is realized, the pedestrian landscape road has good shock resistance and good durability, and the comfort of the pedestrian landscape road is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of building materials, and particularly relates to a regenerated wood chip asphalt concrete, a preparation method thereof and application thereof in preparing a pedestrian landscape road. BACKGROUND

[0002] The pedestrian landscape road refers to a road arranged in a park or a scenic area. The existing pedestrian landscape road is paved by concrete, asphalt concrete, cement bricks and the like. These materials are solid and durable, but have poor shock absorption function. The pedestrian landscape road is usually used for citizens to take a walk or do physical exercise, and therefore needs to have a shock absorption function on the basis of being solid, so as to improve the use comfort and safety performance.

[0003] Wood is a kind of biological material which is easy to process and has relatively high strength. As an industrial and living material, wood has more advantages of carbon fixation and emission reduction, low carbon and energy saving than other materials for the same purpose, and has a wide range of uses in various fields of industry and life. However, a large amount of waste wood and wood chips are generated. The existing waste wood and wood chips are usually used as fuel, fertilizer or feed, which has low utilization rate and few uses, resulting in waste of resources.

[0004] Rubber material has excellent properties such as viscoelasticity, high elasticity and electrical insulation after vulcanization, durability and solvent resistance, and is widely used in people's life and production, especially in automobile tires and rubber shoes. Rubber is a thermosetting polymer after vulcanization. During the vulcanization molding process, cross-linking bonds are formed between molecular chains, so that the entire molecule has a spatial network structure. Due to the action of cross-linking bonds between molecular chains, the molecular chains cannot move, so that the rubber material cannot be dissolved in related solvents and will not melt after heating, making it difficult to be recycled and molded for use after use. With the rapid development of industry, agriculture and transportation in China, the consumption of rubber is increasing. At present, among waste polymer materials, the proportion of recycled rubber is second only to waste plastics. Since rubber cannot be naturally decomposed, the amount of recycled rubber is very close to the production amount of rubber. The accumulation and improper treatment of a large amount of recycled rubber not only causes resource waste, but also seriously pollutes the environment, causing "black pollution". How to properly treat recycled rubber to protect the environment and achieve resource utilization of recycled rubber is a hot research topic in recent years.

[0005] Therefore, how to use wood chips and recycled rubber to prepare a pedestrian landscape road, to achieve resource utilization of wood chips and recycled rubber, protect the environment, and make the pedestrian landscape road have a shock absorption function on the basis of being solid, is a technical problem that needs to be solved by those skilled in the art. SUMMARY

[0006] In view of the problems in the prior art, the present application provides a recycled wood chip asphalt concrete, a preparation method thereof and application thereof in preparing a pedestrian landscape road, which realizes resource utilization of waste wood, waste wood chips and recycled rubber, protects the environment, and enables the pedestrian landscape road to have a shock-absorbing function on the basis of being firm, and takes into account the use comfort and safety performance, thereby providing a good place for citizens to walk or exercise.

[0007] To achieve the above object, the present application provides the following technical scheme:

[0008] The present application provides a preparation method of recycled wood chip asphalt concrete, which comprises the following steps: preheating wood chips, recycled rubber particles, mineral powder and rubber powder asphalt, and then mixing the preheated raw materials to obtain the recycled wood chip asphalt concrete.

[0009] The wood chip method as a light raw material can greatly improve the shock-absorbing function of the concrete, and the prepared concrete has the characteristics of light weight; the rubber, as a high-elastic polymer material with reversible deformation, is elastic, can produce large deformation under external force, and can restore to the original state after the external force is removed, so that the pedestrian landscape road has excellent shock-absorbing performance; the addition of asphalt also makes the road have certain elasticity and plastic deformation ability, can withstand strain without damage, and is more suitable for people's leisure activities; the mineral powder and asphalt together form asphalt mortar, which improves the strength and stability of the asphalt concrete.

[0010] Preferably, the addition amount of each raw material is 680-780 parts by weight of wood chips, 650-750 parts by weight of recycled rubber particles, 250-350 parts by weight of mineral powder and 580-680 parts by weight of rubber powder asphalt.

[0011] Preferably, the wood chips are obtained by pretreatment, and the pretreatment comprises the following steps: crushing waste wood or waste wood chips, soaking and treating with a preservative, and finally drying to obtain the wood chips.

[0012] Preferably, the length of the wood chips is 0.5-1.5 cm, and the cross-sectional diameter is 3-5 mm.

[0013] Preferably, the preservative is ammonia-soluble alkyl amine copper, and the soaking time is ≥48 h.

[0014] Preferably, the drying is natural air drying or drying at 100-110 DEG C.

[0015] Preferably, the preheating temperature of the pretreated wood chips, recycled rubber particles and mineral powder is 120-140 DEG C, and the preheating temperature of the rubber powder asphalt is 135-160 DEG C.

[0016] Preferably, the mixing comprises the following steps: stirring the mixture of preheated wood chips, recycled rubber particles and mineral powder, adding preheated rubber powder asphalt when there is no large fiber balling in the mixture, and stirring uniformly to obtain the regenerated wood chip asphalt concrete.

[0017] Preferably, the mixing process is as follows: first, preheated asphalt, mineral powder and rubber particles are stirred and mixed, then preheated wood chips are added and continue to stir, and then discharge;

[0018] The stirring time is 1-3 min, and the stirring speed is 50-100 r / min.

[0019] The continue stirring time is 2-5 min, and the stirring speed is 50-100 r / min.

[0020] The material temperature at the time of discharging is 110-130℃.

[0021] Preferably, the mineral powder is a mineral powder obtained by grinding hydrophobic stone.

[0022] Preferably, the gradation of the rubber particles is as follows: 100% passing through a 4.75mm aperture sieve; 90%-100% passing through a 2.36mm aperture sieve; 60%-90% passing through a 1.18mm aperture sieve; 40%-65% passing through a 0.6mm aperture sieve; 25%-42% passing through a 0.3mm aperture sieve; 15%-30% passing through a 0.15mm aperture sieve; and 10%-20% passing through a 0.075mm aperture sieve.

[0023] Still another purpose of the present application is to provide the regenerated wood chip asphalt concrete prepared by the preparation method.

[0024] Still another purpose of the present application is to provide an application of the regenerated wood chip asphalt concrete in preparing a pedestrian landscape road, wherein the pedestrian landscape road comprises the following parts: a surface layer 1 composed of the regenerated wood chip asphalt concrete, a base layer 2 composed of water permeable concrete, a cushion layer 3 composed of ordinary concrete, a drainage ditch 4 on both sides of the road, and a water leakage cover plate 5.

[0025] Preferably, the thickness of the surface layer 1 composed of the regenerated wood chip asphalt concrete is 5-8cm.

[0026] The strength grade of the base layer 2 composed of the water permeable concrete is ≥C20, and the thickness is 10-15cm.

[0027] The strength grade of the cushion layer 3 composed of the ordinary concrete is C25-C35, and the thickness is 10-20cm.

[0028] Compared with the prior art, the present application has the following advantages and technical effects:

[0029] The wood chip is used as a light raw material in the method, the damping function of the concrete is greatly improved, and the prepared concrete has the characteristics of light weight; the rubber is a high-elasticity polymer material with reversible deformation, is elastic, can produce large deformation under external force, and can restore the original state after the external force is removed, so that the pedestrian landscape road has excellent damping performance; the addition of the asphalt also makes the road have certain elasticity and plastic deformation capacity, can bear strain without damage, and is more suitable for people's leisure activities; the mineral powder and the asphalt jointly form the asphalt mortar, and the strength and stability of the asphalt concrete are improved.

[0030] The recycled wood chip asphalt concrete has excellent damping function, is suitable for use in pedestrian landscape roads, and realizes recycling of waste wood, waste wood chips and recycled rubber particles, is green and environmentally friendly, greatly improves the damping function of the concrete, saves the use of traditional building materials, and meets the strategic concept of building energy saving and sustainable development. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The illustrations, together with their description, serve to explain the application without imposing undue burden on the reader. In the drawings:

[0032] Figure 1 A schematic view of the structure of the pedestrian landscape road prepared by the present application along the depth direction is shown in the figure;

[0033] In the figure, 1 is a surface layer composed of recycled wood chip asphalt concrete; 2 is a base layer composed of pervious concrete; 3 is a cushion layer composed of ordinary concrete; 4 is a drainage ditch on both sides of the road; and 5 is a water leakage cover plate. DETAILED DESCRIPTION

[0034] The detailed description of the various exemplary embodiments of the present application is not to be considered as limiting the application, but rather as a description of certain aspects, features and embodiments of the application.

[0035] It should be understood that the terms described in the present application are only for describing the specific embodiments, and are not used to limit the present application. In addition, for the numerical range in the present application, it should be understood that each intermediate value between the upper limit and the lower limit of the range is also specifically disclosed. Each smaller range between any stated value or stated range and any other stated value or intermediate value within the stated range is also included in the present application. The upper limit and the lower limit of these smaller ranges can be independently included or excluded from the range.

[0036] Unless otherwise indicated, all technical and scientific terms have the same meaning as those one of ordinary skill in the art of the application described herein would attribute to such terms. Although methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present application, the preferred methods and materials are described. All documents mentioned herein are incorporated by reference to disclose and describe in full the methods and / or materials which are described therein. In case of conflict between the content of the specification and that of any document incorporated herein by reference, the content of the specification prevails.

[0037] Many modifications and variations of the present application described in the specification are possible without departing from the scope or spirit of the application. Other implementations of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The specification and examples given are exemplary only.

[0038] As used herein, the terms "comprises", "comprising", "includes", "including", "has", "having" or the like are open-ended terms that are intended to mean including, but not limited to.

[0039] As used herein, the terms "room temperature" and "ambient temperature" refer to 25±2°C, unless otherwise specified.

[0040] The raw materials used in the following examples of the present application are commercially available.

[0041] The present application provides a preparation method of regenerated wood chip asphalt concrete, comprising the following steps: the wood chips are pretreated before use, the pretreatment comprises the following steps: the wood chips are soaked and treated with a preservative, and finally dried.

[0042] In some embodiments of the present application, the addition amount of each raw material is preferably 680-780 parts by weight of wood chips, 650-750 parts by weight of recycled rubber particles, 250-350 parts by weight of mineral powder, and 580-680 parts by weight of rubber powder asphalt, and more preferably 731 parts by weight of wood chips, 711 parts by weight of recycled rubber particles, 305 parts by weight of mineral powder, and 635 parts by weight of rubber powder asphalt in the examples of the present application.

[0043] In some embodiments of the present application, the wood chips are obtained by pretreatment, which comprises the following steps: waste wood or waste wood chips are crushed, soaked and treated with a preservative, and finally dried to obtain wood chips.

[0044] In some embodiments of the present application, the length of the wood chips is preferably 0.5-1.5 cm, and the cross-sectional diameter is preferably 3-5 mm.

[0045] In some embodiments of the present application, the preservative is ammonia-soluble alkyl amine copper, and the soaking time is preferably ≥48 h, and more preferably 50 h in the examples of the present application.

[0046] In some embodiments of the present application, the drying is preferably natural air drying or drying at 100-110°C, more preferably drying at 105°C in embodiments of the present application.

[0047] In some embodiments of the present application, the preheating temperature of the pretreated wood chips, recycled rubber particles and mineral powder is preferably 120-140°C, more preferably 110°C in embodiments of the present application; the preheating temperature of the rubber powder asphalt is 135-160°C, more preferably 170°C in embodiments of the present application.

[0048] In some embodiments of the present application, the mixing includes the following steps: stirring the mixture of the preheated wood chips, recycled rubber particles and mineral powder, adding the preheated rubber powder asphalt after visually confirming that there are no large fiber clumps in the mixture, and stirring uniformly to obtain the recycled wood chip asphalt concrete.

[0049] In some embodiments of the present application, the mixing process is: first, stirring and mixing the preheated asphalt, mineral powder and rubber particles, then adding the preheated wood chips and continuing to stir, and then discharging;

[0050] In some embodiments of the present application, the stirring and mixing time is preferably 1-3 min, and further preferably 1 min in embodiments of the present application; the stirring speed is preferably 50-100 r / min, and further preferably 90 r / min in embodiments of the present application.

[0051] In some embodiments of the present application, the continuing stirring time is preferably 2-5 min, and further preferably 2 min in embodiments of the present application; the stirring speed is preferably 50-100 r / min, and further preferably 90 r / min in embodiments of the present application.

[0052] In some embodiments of the present application, the temperature of the material when discharged is preferably 110-130°C, and further preferably 125°C in embodiments of the present application.

[0053] In some embodiments of the present application, the mineral powder is preferably a mineral powder obtained by grinding a hydrophobic stone, and more preferably a magma rock mineral powder used in embodiments of the present application; the particle size of the mineral powder is not limited in the present application, as long as it is in powder form.

[0054] In some embodiments of the present application, the gradation of the rubber particles is preferably: 100% passing through a sieve with a 4.75 mm aperture; 90-100% passing through a sieve with a 2.36 mm aperture; 60-90% passing through a sieve with a 1.18 mm aperture; 40-65% passing through a sieve with a 0.6 mm aperture; 25-42% passing through a sieve with a 0.3 mm aperture; 15-30% passing through a sieve with a 0.15 mm aperture; and 10-20% passing through a sieve with a 0.075 mm aperture.

[0055] Another object of the present application is to provide the regenerated sawdust asphalt concrete prepared by the preparation method.

[0056] Still another object of the present application is to provide an application of the regenerated sawdust asphalt concrete in preparing a pedestrian landscape road, which comprises a surface layer 1 composed of the regenerated sawdust asphalt concrete, a base layer 2 composed of the pervious concrete, a cushion layer 3 composed of the ordinary concrete, a drainage ditch 4 and a water leakage cover plate 5 on both sides of the road.

[0057] In some embodiments of the present application, the thickness of the surface layer 1 composed of the regenerated sawdust asphalt concrete is 5-8 cm, and more preferably 6 cm in the embodiments of the present application.

[0058] In some embodiments of the present application, the strength grade of the base layer 2 composed of the pervious concrete is preferably ≥C20, and more preferably C20 in the embodiments of the present application; and the thickness is preferably 10-15 cm, and more preferably 12 cm in the embodiments of the present application.

[0059] In some embodiments of the present application, the strength grade of the cushion layer 3 composed of the ordinary concrete is preferably C25-C35, and more preferably C30 in the embodiments of the present application; and the thickness is preferably 10-20 cm, and more preferably 15 cm in the embodiments of the present application.

[0060] The following embodiments are further illustrations of the technical solutions of the present application.

[0061] The gradation of the recycled rubber particles used in the embodiments and comparative examples of the present application is as follows: 100% of the particles pass through a sieve with a 4.75 mm aperture; 90%-100% of the particles pass through a sieve with a 2.36 mm aperture; 60%-90% of the particles pass through a sieve with a 1.18 mm aperture; 40%-65% of the particles pass through a sieve with a 0.6 mm aperture; 25%-42% of the particles pass through a sieve with a 0.3 mm aperture; 15%-30% of the particles pass through a sieve with a 0.15 mm aperture; and 10%-20% of the particles pass through a sieve with a 0.075 mm aperture.

[0062] Example 1

[0063] Preparation of the regenerated sawdust asphalt concrete:

[0064] S1, pretreatment of the sawdust: the waste wood is crushed and soaked with an ammonia-soluble alkyl amine copper (ACQ) preservative for treatment, and then dried to obtain sawdust with a length of 0.5-1.5 cm and a cross-sectional diameter of 3-5 mm; the soaking treatment is normal pressure soaking, and the soaking time is 50 h; and the drying is oven drying at 105°C.

[0065] S2, material preheating: 635 parts of the rubber powder asphalt were placed in an oven at 150°C for heating to obtain a flowing rubber powder asphalt; 305 parts of the magmatic rock powder, 731 parts of the wood chips and 711 parts of the recycled rubber particles were placed in an oven at 130°C for heating respectively;

[0066] S3, raw material mixing: the heated magmatic rock powder, wood chips and recycled rubber particles were pre-stirred and mixed until no large fiber clumps were observed, then poured into the flowing rubber powder asphalt and mixed uniformly to obtain the recycled wood chip asphalt concrete;

[0067] The mixing was performed by using a warm-mixed asphalt special equipment in accordance with the Technical Specification for Construction of Highway Asphalt Pavement JTGF40, and the mixing equipment should have a forced stirring function. The mixing process was as follows: first, the asphalt, mineral powder and rubber particles were stirred and mixed at a stirring speed of 90 rpm per minute for 1 minute, then the preheated wood chips were added and stirred at a speed of 90 rpm per minute for 2 minutes, and then the material was discharged (the material discharge temperature was 125°C).

[0068] Example 2

[0069] Preparation of the recycled wood chip asphalt concrete:

[0070] S1, pretreatment of the wood chips: the waste wood chips were crushed and treated by soaking with an ammonia-soluble alkyl amine copper (ACQ) preservative, and then dried to obtain wood chips with a length of 0.5-1.5 cm and a cross-sectional diameter of 3-5 mm. The soaking treatment was normal pressure soaking, and the soaking time was 54 hours; the drying was oven drying at 105°C.

[0071] S2, material preheating: 780 parts of the rubber powder asphalt were placed in an oven at 175°C for heating to obtain a flowing rubber powder asphalt; 350 parts of the limestone powder, 700 parts of the wood chips and 650 parts of the recycled rubber particles were placed in an oven at 115°C for heating respectively;

[0072] S3, raw material mixing: the heated limestone powder, wood chips and recycled rubber particles were pre-stirred and mixed until no large fiber clumps were observed, then poured into the flowing rubber powder asphalt and mixed uniformly to obtain the recycled wood chip asphalt concrete;

[0073] The mixing process was as follows: first, the asphalt, mineral powder and rubber particles were stirred and mixed for 1.5 minutes at a stirring speed of 60 rpm per minute, then the preheated wood chips were added and stirred at a speed of 60 rpm per minute for 2 minutes, and then the material was discharged (the material discharge temperature was 121°C).

[0074] Example 3

[0075] The other conditions were the same as in Example 1, except that the raw materials were as follows: wood chips 762 parts, recycled rubber particles 723 parts, granite powder 280 parts and rubber powder asphalt 657 parts.

[0076] Example 4

[0077] Other conditions are the same as example 1, the only difference is that the raw material adding amount is: sawdust 774 parts, recycled rubber particles 655 parts, magma rock powder 326 parts and rubber powder asphalt 609 parts.

[0078] Example 5

[0079] Other conditions are the same as example 1, the only difference is that when the material is preheated, the preheating temperature of the rubber powder asphalt is 160 DEG C; the preheating temperature of the limestone powder, sawdust and recycled rubber particles is 140 DEG C.

[0080] Example 6

[0081] Other conditions are the same as example 1, the only difference is that the mixing process is: first, the asphalt, mineral powder and rubber particles are mixed and stirred for 2 minutes at a stirring speed of 60 revolutions per minute, then the preheated sawdust is added and continues to be stirred at a speed of 60 revolutions per minute for 5 minutes, and then the material is discharged (the material discharge temperature is 115 DEG C).

[0082] Comparative example 1

[0083] Common asphalt concrete pavement

[0084] The asphalt used is No. 70, the oil-stone ratio is 5%, the 10-15 crushed stone coarse aggregate is 26%, the 5-10 crushed stone coarse aggregate is 28%, the sand fine aggregate is 43%, and the filler mineral powder is 3%. The hot-mixed asphalt special equipment in accordance with the Technical Specification for Highway Asphalt Pavement Construction JTGF40 is used for mixing, wherein the asphalt is heated to 160 DEG C, the aggregate is heated to 170 DEG C, the discharge temperature is 150 DEG C, and the surface temperature at the end of the rolling is 75 DEG C.

[0085] The pavement is a common city asphalt pavement method, and the pedestrians feel relatively hard on the pavement, while the regenerated sawdust asphalt concrete surface layer of the present application feels more soft when walking, similar to a plastic playground.

[0086] Compressive strength test

[0087] The regenerated sawdust asphalt concrete in examples 1-6 is taken to make standard test pieces, and the compressive strength of the standard test pieces after standard curing is tested according to the Standard Test Methods for Mechanical Properties of Ordinary Concrete GB / T50081-2016.

[0088] S1, preparation of test pieces: the test pieces should be formed according to the standard compaction method. The regenerated sawdust asphalt concrete in examples 1-6 is placed into a standard Marshall test piece, and then placed into a Marshall compactor for compaction. The fixed test piece is cured and hardened.

[0089] The standard Marshall specimen mold size shall meet the requirements of 101.6 mm ± 0.2 mm in diameter and 63.5 mm ± 1.3 mm in height. After several tests and adjustments, the amount of mixture in each mold was determined to be 400 g.

[0090] S2, specimen compression: the cured specimen was demolded and taken out, and a 200 t press was used for compression test. The test results are shown in Table 1:

[0091] Table 1, compression strength of the recycled wood chip asphalt concrete prepared in Examples 1-6

[0092]

[0093] After testing, the specimen compression strength was stable in the range of 10.5 ± 1.0 Mpa.

[0094] Considering that this pavement is a park pedestrian pavement, the pressure on pedestrians was calculated: considering the weight of a pedestrian of 100 kg and the foot contact area of 200 mm * 50 mm.

[0095] Gravity G = 100 * 10 = 1000 N = 1 KN.

[0096] Pressure p = 1000 / 10000 = 0.1 Mpa.

[0097] According to the calculation, the pressure brought by a person is much smaller than the pressure that the recycled wood chip asphalt concrete can withstand.

[0098] Application Example 1

[0099] Preparation of a pedestrian landscape road

[0100] A 150 mm thick cushion layer 3 was prepared from ordinary Portland cement concrete with a strength grade of C30, a base layer 2 composed of pervious concrete (thickness 12 cm, pervious concrete strength grade C20) was laid on the cushion layer, then a surface layer 1 composed of recycled wood chip asphalt concrete (thickness 6 cm, the recycled wood chip asphalt concrete used was derived from Example 1) was laid on the base layer 2, ordinary concrete was used to cast "L" shaped drainage ditches on both sides, and finally a water leakage cover plate 5 was laid on top, thus a pedestrian landscape road was prepared.

[0101] Shock absorption test:

[0102] According to the "Standard for Testing Methods of Mechanical Properties of Ordinary Concrete GB / T 50081", the elastic modulus of the application example 1 pedestrian landscape road is measured at 20℃, and the test obtains the elastic modulus range of 100-400MPa, and the average value is 250MPa. The ordinary asphalt concrete used in the general road pavement surface layer has the elastic modulus of 1200-1600MPa at 20℃. Here, the elastic modulus of the pavement surface layer material is used to indirectly describe the damping effect, and the pedestrian landscape road prepared by the application has small elastic modulus, and people will feel soft when stepping on, that is, there is damping effect.

[0103] The above is only the preferred specific embodiment of the application, but the protection scope of the application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the application, which should be covered within the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. Use of recycled wood-chip asphalt concrete in the preparation of a pedestrian landscape path, characterized in that, The human landscape road comprises a surface layer (1) made of recycled wood chip asphalt concrete, a base layer (2) made of pervious concrete, a cushion layer (3) made of ordinary concrete, a drainage ditch (4) on both sides of the road and a water leakage cover plate (5). The preparation method of the recycled wood chip asphalt concrete comprises the following steps: preheating wood chips, recycled rubber particles, mineral powder and rubber powder asphalt, and then mixing the preheated raw materials to obtain the recycled wood chip asphalt concrete. The wood chips are obtained through pretreatment, and the pretreatment comprises the following steps: crushing waste wood or waste wood chips, soaking and treating with a preservative, and finally drying to obtain the wood chips; the length of the wood chips is 0.5-1.5 cm, and the cross-sectional diameter is 3-5 mm; the soaking time is greater than or equal to 48 h; the drying is natural air drying or drying at 100-110 DEG C. The mineral powder is obtained by grinding hydrophobic stone. The gradation of the rubber particles is as follows: 100% of the particles pass through a sieve with a 4.75 mm aperture; 90-100% of the particles pass through a sieve with a 2.36 mm aperture; 60-90% of the particles pass through a sieve with a 1.18 mm aperture; 40-65% of the particles pass through a sieve with a 0.6 mm aperture; 25-42% of the particles pass through a sieve with a 0.3 mm aperture; 15-30% of the particles pass through a sieve with a 0.15 mm aperture; and 10-20% of the particles pass through a sieve with a 0.075 mm aperture. The adding amount of each raw material is 680-780 parts by weight of wood chips, 650-750 parts by weight of recycled rubber particles, 250-350 parts by weight of mineral powder and 580-680 parts by weight of rubber powder asphalt.

2. Use of the recycled wood shavings asphalt concrete according to claim 1 for the preparation of pedestrian landscape roads, characterized in that, The preheating temperature of the pretreated wood chips, recycled rubber particles and mineral powder is 120-140 DEG C, and the preheating temperature of the rubber powder asphalt is 135-160 DEG C.

3. Use of the recycled wood shavings asphalt concrete according to claim 1 for the preparation of pedestrian landscape roads, characterized in that, The mixing comprises the following steps: stirring the mixture of the preheated wood chips, recycled rubber particles and mineral powder, adding the preheated rubber powder asphalt after the mixture is free of fiber clumps, and stirring uniformly to obtain the recycled wood chip asphalt concrete.

4. Use of the recycled wood shavings asphalt concrete according to claim 1 for the preparation of pedestrian landscape roads, characterized in that, The mixing process is as follows: first, stirring and mixing the preheated asphalt, mineral powder and rubber particles, then adding the preheated wood chips and continuing to stir, and finally discharging the material; The stirring and mixing time is 1-3 min, and the stirring speed is 50-100 r / min. The continuing stirring time is 2-5 min, and the stirring speed is 50-100 r / min. The temperature of the material during discharging is 110-130 DEG C.

5. Use of the recycled wood shavings asphalt concrete according to claim 1 for the preparation of pedestrian landscape roads, characterized in that, The thickness of the surface layer (1) made of recycled wood chip asphalt concrete is 5-8 cm; the strength grade of the base layer (2) made of pervious concrete is greater than or equal to C20, and the thickness is 10-15 cm; and the strength grade of the cushion layer (3) made of ordinary concrete is C25-C35, and the thickness is 10-20 cm.

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