A kind of natural reserve green environmental protection road composite material and preparation method and application

Abstract

The application discloses a kind of for nature reserve green environmental protection road composite material and preparation method and application, and nature reserve green environmental protection road composite material includes mixed soil, sodium lignosulfonate, quicklime, mixed latex and water.Nature reserve green environmental protection road composite material in the application of building road includes the following steps: roadbed shoulder preparation, preparation nature reserve green environmental protection road composite material, mechanical paving, rolling forming, light receiving and compaction maintenance.The application utilizes difficult to recycle waste material to utilize again, reduces the demand of natural resources, and has less influence on environment, while the strength of nature reserve green environmental protection road composite material is higher, meets the requirement of environmental road construction in nature reserve and the like, conforms to the development trend of current green building, and has wide application prospect.

Description

Technical Field

[0001] This invention relates to the field of road construction technology, and in particular to a green and environmentally friendly road composite material for nature reserves, its preparation method, and its application. Background Technology

[0002] To protect the ecological environment of nature reserves and forest areas, roads, parking lots, and recreational areas should be constructed using eco-friendly, low-energy, and low-emission materials. Traditional, non-reclaimable building materials such as cement, asphalt, and synthetic rubber should be abandoned. This would reduce the impact and damage to the ecological environment caused by rain erosion, road collapse, and the construction and maintenance of roads. Existing green road materials often use a large amount or entirely natural formulas to minimize environmental impact, resulting in lower flexural and compressive strength. Roads made from these materials are prone to cracking, with long and wide cracks, and lower compaction, smoothness, and 7-day immersion compressive strength. Conversely, to improve flexural and compressive strength, high-performance polymers are used, requiring the combustion of more fossil fuels and increasing carbon dioxide emissions. Therefore, it is difficult for those skilled in the art to simultaneously achieve high environmental protection while also developing a green road composite material with high flexural and compressive strength. Furthermore, in the actual road paving process, the road construction relies heavily on the experience and skill of relevant technical personnel, which can easily lead to inconsistent efficiency and quality. After collecting grayscale images, the image processing methods and learning machines used have too low accuracy and the data processing time is too long. The present invention relates to a green and environmentally friendly road composite material for nature reserves, its preparation method, and its application. This method is green, environmentally friendly, low-carbon, and energy-saving, and is suitable for application in forest areas, nature reserves, farms, school playgrounds, mines, etc. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the prior art by proposing a composite material for green and environmentally friendly roads in nature reserves, its preparation method, and its application.

[0004] A composite material for green and environmentally friendly roads in nature reserves includes mixed soil, sodium lignosulfonate, quicklime, mixed latex, plant fibers, and water.

[0005] Furthermore, the composite material for green and environmentally friendly roads in nature reserves comprises, by weight, 60-100 parts mixed soil, 0.5-2 parts sodium lignosulfonate, 2-10 parts quicklime, 2-9 parts mixed latex, 1-20 parts plant fiber, and 2-20 parts water.

[0006] Furthermore, the mixed soil is made of clay, sand, and recycled glass powder.

[0007] Furthermore, the mixed soil is made from the following raw materials in the following weight ratios: 1-6 parts clay, 3-6 parts sand and 0.5-6 parts recycled glass powder.

[0008] Furthermore, the pulp material is made from substandard paper, hardwood fiber, and eucalyptus oil.

[0009] Furthermore, the pulp material is made from the following raw materials in parts by weight: 40-80 parts of substandard paper, 10-25 parts of hardwood fiber and 1-8 parts of eucalyptus oil.

[0010] Furthermore, the mixed latex is made from the following raw materials in the following weight ratios: 20-40 parts glutinous rice glue, 30-60 parts pulp material and 5-15 parts natural rubber liquid, wherein the plant fiber is one or more of wood fiber, hemp fiber and bamboo fiber.

[0011] Furthermore, a method for preparing a green and environmentally friendly road composite material for nature reserves includes separately crushing glass using a ball mill to produce recycled glass powder with a particle size range of 21-75 micrometers.

[0012] Furthermore, a method for preparing a green and environmentally friendly road composite material for nature reserves includes impregnating 40-80 parts of waste paper and 10-25 parts of hardwood fiber into a crusher, crushing them into fragments that can pass through a sieve with a pore size of 1-4 cm, then adding water to the fragments and mixing them evenly to prepare a primary pulp with a concentration of 35 wt%. The primary pulp is then subjected to a twin-screw mill for shredding and fiber separation. Both screws of the twin-screw mill have a diameter of 80 mm and a rotation speed of 140-160 r / min. The two screws rotate in the same direction, and the screw gap between them is gradually reduced from 10mm to 0.5mm along the coarse pulp conveying direction. The flow rate of the primary pulp in the twin-screw mill is 600kg / h. After fine grinding, the primary pulp concentration is adjusted to 3-6wt% with deionized water. The pulp is then de-latented at a temperature of 70℃ and a stirring speed of 200r / min for 40min. After adding 1-8 parts of eucalyptus oil, the pulp is beaten to a freeness of 20°SR to produce pulp material.

[0013] Glutinous rice flour and water are mixed in a weight percentage ratio of 20-40%:60-80% to make glutinous rice glue. Glutinous rice glue, pulp material and natural rubber liquid are mixed in a weight ratio of 20-40:30-60:5-15 and heated to 30-60℃. After thorough stirring and chelation for 2 hours, a mixed latex is obtained.

[0014] Take 60-100 parts by weight of mixed soil (clay:sand:recycled glass powder weight ratio of 1-6:3-6:0.5-6), stir at a stirring speed of 500 r / min, and add 0.5-2 parts by weight of sodium lignosulfonate, 2-10 parts of quicklime, 2-9 parts of mixed latex and 2-20 parts of water to the mixed soil one by one, stir for 15-30 minutes, and mix evenly to obtain a green and environmentally friendly road composite material for nature reserves.

[0015] Furthermore, an application of a green and environmentally friendly road composite material for nature reserves includes roadbed and shoulder preparation, preparation of the green and environmentally friendly road composite material for nature reserves, mechanical paving, rolling molding, finishing and compaction curing.

[0016] Furthermore, a 5-megapixel CMOS camera is installed at the bottom center of the road roller and paver, parallel to the road surface. Image acquisition is performed every 60 seconds until a round of rolling or paving is completed.

[0017] The image is processed using a Gaussian filtering algorithm. A Gaussian template is used to weight the gray values ​​of all pixels in the neighborhood of the pixel to be processed, and the weighted result is used to replace the gray values.

[0018] Furthermore, using a lossless compression method, the colors of the sample images are converted into corresponding grayscale images, and the corresponding expressions are given. Then, while ensuring accuracy, the grayscale levels of the grayscale images are compressed. The image grayscale levels corresponding to compression levels 1-5 are 8, 16, 32, 64, 128, and 256, respectively.

[0019] Furthermore, combining the common features of compacted and paved road surface images, a combination of statistical feature parameters—contrast, homogeneity, correlation, inertia, and second-order angular moments—is used as feature values ​​for texture classification.

[0020] Contrast: It reflects the overall and local changes in the acquired image, and indicates the sharpness of the image and the depth of the grooves in the texture.

[0021] Homogeneity: Reflects the homogeneity of image texture and measures local variations in image texture;

[0022] Correlation: Measures the gray-level similarity of images in the row or column direction, reflecting the correlation of local gray levels;

[0023] Inertia: A measure of the invariance between pixels at different gray levels in an image;

[0024] The second moment of the angle is the sum of the squares of the elements of the gray-level co-occurrence matrix, also known as energy. Energy transformation reflects the uniformity of image distribution and texture thickness.

[0025] Furthermore, if the contrast, correlation, inertia, and second moment of the angular velocity in the output feature values ​​are all 0 or equal, they are invalid feature values. In this case, the window needs to be reduced towards the center, and the image at the more central position after reduction needs to be analyzed again using the OGLCM structure until valid feature values ​​are output.

[0026] Furthermore, the data after extracting effective feature values ​​is divided into 80 training samples and 20 test samples. An ELM network structure is constructed, relevant parameters are determined, and an ELM classifier is established. The training samples are input into the ELM classifier, and after 12 repeated training iterations, appropriate input weights and thresholds are obtained. The test samples are input into the trained model to obtain recognition results. After manual recognition and judgment, the model is put into use. Surface images of the road surface under the roller are collected and processed, and input into the ELM classifier to identify the road surface condition after rollerization to help improve work efficiency and establish a database.

[0027] Furthermore, a vehicle-mounted dashcam equipped with optical sensors and data transmission capabilities is installed at the front of the vehicle or other suitable locations to ensure that the camera's field of view covers the road area. The automatically collected road light data is stored in the dashcam's built-in storage device, such as an SD card or solid-state drive, in chronological order. The collected road light data is transmitted to other devices, such as smartphones or computers, via wireless connections (e.g., Wi-Fi, Bluetooth) or wired connections (e.g., USB). A Gaussian filtering algorithm and a combination of statistical feature parameters, such as contrast, homogeneity, correlation, inertia, and second-order angular moments, are used as feature values ​​for texture classification to extract road features and perform illumination correction.

[0028] The present invention proposes a composite material for green and environmentally friendly roads in nature reserves, its preparation method, and its application, which have the following beneficial effects:

[0029] (1) The green and environmentally friendly road composite material used in the road nature reserve of the present invention is easily degraded in nature after being crushed, and is environmentally friendly, energy-saving and low-carbon.

[0030] (2) The construction methods of roadbed and shoulder preparation, preparation of green and environmentally friendly road composite materials in nature reserves, mechanical paving, rolling and molding, finishing and compaction maintenance improve construction efficiency, have little impact on the environment, and the VOCs content of green and environmentally friendly road composite materials in nature reserves is low, with VOCs content ≤15.28 (g / L).

[0031] (3) By recycling and utilizing waste glass to replace dense aggregates with silica as the main component, such as sand, silica sand particles, and ceramic sand, the problem of excessive resource exploitation and waste caused by the difficulty of recycling waste glass is solved, and limited natural resources and sensitive ecosystems are protected. The secondary development and utilization of waste materials that are difficult to recycle is in line with the theme of green environmental protection and helps to promote green and sustainable development. Utilizing the antibacterial and binding properties of quicklime and the antibacterial, cleaning, and insecticidal properties of eucalyptus oil, along with its rich plant fragrance, combined with waste paper as an environmentally friendly road material can help improve the road environment, reduce the demand for natural resources, and contribute to environmental protection and sustainable development. A green and environmentally friendly road composite material, prepared through various pathways and mechanisms using recycled glass powder, sodium lignosulfonate, quicklime, mixed latex, plant fibers, and water in a synergistic effect, exhibits high flexural and compressive strength (3-day strength ≥ 4.7 MPa), few cracks in 24 hours (only 1 crack), and small crack width and length (crack width ≤ 0.24 mm, crack length ≤ 85 mm). It achieves a compaction degree of 95%, a flatness of 10 mm, and a 7-day water immersion compressive strength of 0.9 MPa, while also having a low VOC content. Meeting road standards and with minimal environmental impact, it is suitable for locations such as nature reserves.

[0032] (4) Five feature values ​​in GLCM are selected to perform texture analysis on the acquired images. After processing, the images are fed into the optimized extreme learning machine (ELM) for classification. The five feature values ​​selected based on the actual road rolling situation can process the images more accurately and quickly. Combined with the fast training neural network algorithm, it can help technicians better process and identify road rolling situations on a large scale, and facilitate the construction of an internal database.

[0033] (5) Road lighting is usually affected by lighting conditions, such as changes in the intensity and angle of sunlight. Real-time lighting estimation and correction can eliminate the impact of lighting changes on road lighting and improve the stability and robustness of road lighting. Detailed Implementation

[0034] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0035] Unless otherwise specified, the examples and comparative examples are parallel experiments with the same components, component content, preparation steps, and preparation parameters. The experimental methods in the following examples are conventional methods unless otherwise specified. Unless otherwise specified, the experimental materials used in the following examples are all purchased from commercial channels.

[0036] The basis weight of substandard household paper or waste paper is 21-26 g / m³. 2 The whiteness is 35-45%, and the moisture content is 5.0-6.5%. The mixed soil used is derived from clay from the plains, sand from the Yellow River floodplain, and recycled glass. The dry density of the clay is 1.85ρdmax / g / cm3, and the moisture content is 13.5-14.5%; the dry density of the sand is 1.95ρdmax / g / cm3, and the moisture content is 10.5-12.5%. The recycled glass has a silica content of 62.08% and a calcium content of 11.32%. The natural rubber liquor was purchased from Jinan Luchu Rubber & Chemical Co., Ltd., and its solid content is 60%.

[0037] Example 1

[0038] Preparation of recycled glass powder: The recycled glass is individually crushed using a ball mill to produce recycled glass powder with a particle size range of 60 micrometers.

[0039] Preparation of pulp material: 80 parts waste paper and 15 parts hardwood fiber were impregnated and fed into a shredder to be crushed into fragments that could pass through a sieve with a pore size of 3 cm. Water was then added to the fragments and mixed evenly to prepare a primary pulp with a concentration of 35 wt%. The primary pulp was then subjected to a grinding and fiber separation process using a twin-screw mill. The diameter of the two screws in the twin-screw mill was 80 mm, the rotation speed of the two screws was 160 r / min, the rotation direction of the two screws was the same, and the screw gap of the two screws was gradually reduced from 10 mm to 0.5 mm along the coarse pulp conveying direction. The flow rate of the primary pulp in the twin-screw mill was 600 kg / h. After fine grinding, the concentration of the primary pulp was adjusted to 6 wt% with deionized water. The pulp was then de-latented at a temperature of 70℃ and a stirring speed of 200 r / min for 40 min. After adding 5 parts eucalyptus oil, the pulp was beaten to a freeness of 20°SR to prepare the pulp material.

[0040] Preparation of mixed latex: Glutinous rice flour and water are mixed in a weight percentage ratio of 25%:75% to make glutinous rice glue. Glutinous rice glue, pulp material and natural rubber liquid are mixed in a weight ratio of 20:60:10 and heated to 60℃. After thorough stirring and chelation for 2 hours, mixed latex is obtained.

[0041] Preparation of green and environmentally friendly road composite material for nature reserves: Take 80 parts by weight of mixed soil (clay:sand:recycled glass powder in a weight ratio of 3:6:1), stir at a stirring speed of 500 r / min, and add 0.5 parts by weight of sodium lignosulfonate, 5 parts by weight of quicklime, 7 parts by weight of mixed latex, 5 parts by weight of plant fiber and 2.5 parts by weight of water to the mixed soil. Stir for 30 minutes to mix evenly and obtain green and environmentally friendly road composite material for nature reserves.

[0042] application:

[0043] S1, Roadbed and Shoulder Preparation

[0044] Clean the roadbed and shoulders thoroughly, ensuring a smooth, dense, flat surface free of loose particles. Compact and level the road to be constructed, ensuring the roadbed and shoulders are on the same horizontal line.

[0045] S2. Preparation of green and environmentally friendly road composite materials for nature reserves

[0046] The green and environmentally friendly road composite material of the nature reserve is spread evenly on the surface of the walkway and bicycle path, with a thickness of 100mm, and then laid as required.

[0047] S3, Mechanical paving

[0048] The environmentally friendly composite material for the nature reserve's roads will be transported to the construction site by dump trucks. During transport, the materials should be covered to prevent rain or moisture evaporation. Upon arrival at the site, the materials will be unloaded into the paver's hopper under the instructions of the on-site construction supervisor. The paver should move evenly, with its speed controlled below 0.1 m / s. The edges and corners of the paved area should be manually leveled.

[0049] S4, Roll forming

[0050] Compaction should follow the principle of static compaction followed by vibratory compaction. First, use a 150kN rubber-tired light roller to perform one pass of static compaction from the edge to the center, then use a 250kN roller to perform five passes of vibratory compaction from the edge to the center. During compaction, ensure that the wheel tracks overlap by 1 / 3 between each pass. The roller's travel speed should be controlled within 0.1m / s. Use weak vibration only, not strong vibration; activate vibration when the roller is moving forward, and deactivate it when moving backward. When the base course compaction degree reaches 98%, the compaction energy per unit volume should be ≥2491KJ / m³. 3 .

[0051] S5, Light Reduction

[0052] After vibration compaction, the surface is then slowly polished using a corresponding steel wheel roller to achieve a smooth, clean surface free of fish-scale-like surface cracks.

[0053] S6. Compaction and Curing

[0054] After compaction, traffic is closed and a rainproof film is laid. If the weather is cold, a straw mat is laid under the rainproof film. When the weather is dry, the rainproof film is uncovered every day and water is sprayed on the straw mat to keep the construction section and the ground moist. It is put into use after 7 days.

[0055] Example 2

[0056] The preparation of the green and environmentally friendly road composite material for nature reserves is different from that in Example 1, which uses the same steps S1-S6.

[0057] Preparation of recycled glass powder: The glass is individually crushed using a ball mill to produce recycled glass powder with a particle size range of 21 micrometers.

[0058] Preparation of pulp material: 40 parts waste paper and 10 parts hardwood fiber were impregnated and fed into a shredder to be crushed into fragments that could pass through a sieve with a pore size of 1 cm. Water was then added to the fragments and mixed evenly to prepare a primary pulp with a concentration of 35 wt%. The primary pulp was then subjected to a grinding and fiber separation process using a twin-screw mill. The diameter of the two screws in the twin-screw mill was 80 mm, the rotation speed of the two screws was 150 r / min, the rotation direction of the two screws was the same, and the screw gap of the two screws was gradually reduced from 10 mm to 0.5 mm along the coarse pulp conveying direction. The flow rate of the primary pulp in the twin-screw mill was 600 kg / h. After fine grinding, the concentration of the primary pulp was adjusted to 3 wt% with deionized water. The pulp was then de-latented at a temperature of 70℃ and a stirring speed of 200 r / min for 40 min. After adding 1 part eucalyptus oil, the pulp was beaten to a freeness of 20°SR to prepare the pulp material.

[0059] Preparation of mixed latex: Mix glutinous rice flour and water in a weight percentage ratio of 20%:80% to make starch glue. Mix glutinous rice glue, pulp material and natural rubber liquid in a weight ratio of 40:30:5, heat to 30°C, stir thoroughly and let stand for chelation for 2 hours to obtain mixed latex.

[0060] Preparation of green and environmentally friendly road composite material for nature reserves: Take 100 parts by weight of mixed soil (clay: sand: recycled glass powder in a weight ratio of 6:6:6), stir at a stirring speed of 500 r / min, and add 2 parts by weight of sodium lignosulfonate, 6 parts of quicklime, 5 parts of mixed latex, 3 parts of plant fiber and 9 parts of water to the mixed soil one by one, stir for 25 minutes, and mix evenly to obtain green and environmentally friendly road composite material for nature reserves.

[0061] Example 3

[0062] The preparation of the green and environmentally friendly road composite material for nature reserves is different from that in Example 1, which uses the same steps S1-S6.

[0063] Preparation of recycled glass powder: The glass is individually crushed using a ball mill to produce recycled glass powder with a particle size range of 75 micrometers.

[0064] Preparation of pulp material: 60 parts waste paper and 25 parts hardwood fiber were impregnated and fed into a shredder to be crushed into fragments that could pass through a sieve with a pore size of 4 cm. Water was then added to the fragments and mixed evenly to prepare a primary pulp with a concentration of 35 wt%. The primary pulp was then subjected to a grinding and fiber separation process using a twin-screw mill. The diameter of the two screws in the twin-screw mill was 80 mm, the rotation speed of the two screws was 150 r / min, the rotation direction of the two screws was the same, and the screw gap of the two screws was gradually reduced from 10 mm to 0.5 mm along the coarse pulp conveying direction. The flow rate of the primary pulp in the twin-screw mill was 600 kg / h. After fine grinding, the concentration of the primary pulp was adjusted to 5 wt% with deionized water. The pulp was then de-latented at a temperature of 70℃ and a stirring speed of 200 r / min for 40 min. After adding 8 parts eucalyptus oil, the pulp was beaten to a freeness of 20°SR to prepare the pulp material.

[0065] Preparation of mixed latex: Mix glutinous rice flour and water in a weight percentage ratio of 40%:60% to make starch glue. Mix glutinous rice glue, pulp material and natural rubber liquid in a weight ratio of 20:30:15, heat to 50°C, stir thoroughly and let stand for chelation for 2 hours to obtain mixed latex.

[0066] Preparation of green and environmentally friendly road composite material for nature reserves: Take 60 parts by weight of mixed soil (clay: sand: recycled glass powder in a weight ratio of 6:6:2), stir at a stirring speed of 500 r / min, and add 1 part by weight of sodium lignosulfonate, 2 parts of quicklime, 5 parts of mixed latex, 1 part of plant fiber and 15 parts of water to the mixed soil one by one, stir for 20 minutes, and mix evenly to obtain green and environmentally friendly road composite material for nature reserves.

[0067] Example 4

[0068] A 5-megapixel CMOS camera is installed at the bottom center of the road roller and paver, parallel to the road surface. Images are captured every 60 seconds until a round of rolling or paving is completed.

[0069] The image is processed using a Gaussian filtering algorithm. A Gaussian template is used to weight the gray values ​​of all pixels in the neighborhood of the pixel to be processed, and the weighted result is used to replace the gray values.

[0070] Using a lossless compression method, the colors of the sample images are converted into corresponding grayscale images, and the corresponding expressions are given. Then, while ensuring accuracy, the grayscale levels of the grayscale images are compressed. The grayscale levels corresponding to compression levels 1-5 are 8, 16, 32, 64, 128, and 256, respectively.

[0071] The OGLCM structure is related to construction parameters such as image gray level g, generation step size d, and scanning angle. Combining the common features of rolling and paved road surface images, a combination of statistical feature parameters such as contrast, homogeneity, correlation, inertia, and second-order angular moment is used as the feature values ​​for texture classification.

[0072] Contrast: It reflects the overall and local changes in the acquired image, and indicates the sharpness of the image and the depth of the grooves in the texture.

[0073] Homogeneity: Reflects the homogeneity of image texture and measures local variations in image texture;

[0074] Correlation: Measures the gray-level similarity of images in the row or column direction, reflecting the correlation of local gray levels;

[0075] Inertia: A measure of the invariance between pixels at different gray levels in an image;

[0076] The second moment of the angle is the sum of the squares of the elements of the gray-level co-occurrence matrix, also known as energy. Energy transformation reflects the uniformity of image distribution and texture thickness.

[0077] If the contrast, correlation, inertia, and second moment of the angle in the output feature values ​​are all 0 or equal, they are invalid feature values. In this case, the window needs to be reduced towards the center, and the image at the more central part after reduction needs to be analyzed again using the OGLCM structure until valid feature values ​​are output.

[0078] The data after extracting effective feature values ​​were divided into 80 training samples and 20 test samples. An ELM network structure was constructed, relevant parameters were determined, and an ELM classifier was established. The training samples were input into the ELM classifier, and after 12 repeated training iterations, appropriate input weights and thresholds were obtained. The test samples were input into the trained model to obtain recognition results. After manual recognition and judgment, the model was put into use. Surface images of the road surface under the roller were collected and processed, and input into the ELM classifier to identify the road surface condition after rollerization to help improve work efficiency and establish a database.

[0079] Example 5

[0080] A vehicle-mounted dashcam equipped with an optical sensor and data transmission capability is installed at the front of the vehicle or another suitable location to ensure that the camera's field of view covers the road area. The automatically collected road light data is stored in chronological order on the dashcam's solid-state drive. The collected road light data is transmitted to a computer via wireless Bluetooth. A Gaussian filtering algorithm and a combination of statistical feature parameters such as contrast, homogeneity, correlation, inertia, and second-order angular moment are used as feature values ​​for texture classification to extract road features and perform illumination correction.

[0081] Comparative Example 1

[0082] The difference between Comparative Example 1 and Example 1 is that there is no equal part by weight of sodium lignosulfonate, otherwise it is the same as Example 1.

[0083] Comparative Example 2

[0084] The difference between Comparative Example 2 and Example 1 is that there is no equal weight of recycled glass powder, otherwise it is the same as Example 1.

[0085] Comparative Example 3

[0086] The difference between Comparative Example 3 and Example 1 is that there are no equal parts by weight of mixed latex; otherwise, they are the same as Example 1.

[0087] Comparative Example 4

[0088] The difference between Comparative Example 4 and Example 1 is that there is no equal weight of plant fiber, otherwise it is the same as Example 1.

[0089] Performance testing

[0090] The test methods for the performance of building road materials are "Test Methods for Long-Term Performance and Durability of Ordinary Concrete" (GBJ82-1985), "Technical Specifications for Construction of Asphalt Pavement on Highways" (JTGF40-2004), JT / C984-2005, etc.

[0091] The strength (flexural / compressive strength) and crack resistance of the building areas in the embodiments and comparative examples were tested according to the above method. The test method is as follows: Test devices and specimens were prepared and processed according to the requirements of CECS13:2009 "Standard for Test Methods of Fiber Reinforced Concrete", specifically the "Comparative Test of Early-Age Crack Resistance". Immediately after casting, compaction, and smoothing, the specimens were subjected to an indoor wind test at a temperature of 20±5℃ and a relative humidity of no more than 60%. Each specimen was blown by an electric fan, with the wind direction parallel to the specimen surface. The wind speed on the upper surface of the middle part of the specimen was controlled at 5m / s-6m / s. The number, width, and length of cracks were observed 24 hours after water addition. Crack observation was based on visible cracks, and the length was measured with a steel ruler. The straight-line distance between the two ends of the crack can be approximated as the crack length. The test results are shown in Table 1.

[0092] Table 1

[0093]

[0094]

[0095] After the green and environmentally friendly roads and sites in the nature reserve are completed in the above-mentioned Example 1, they shall be tested and evaluated in accordance with the "Highway Engineering Quality Inspection and Evaluation Standard" (JTG F80 / 1-2004) and the design drawings. Only after the test is qualified can the road surface be constructed. The test items are shown in Table 2 below.

[0096] Table 2

[0097]

[0098]

[0099] The VOCs content of the green and environmentally friendly road composite materials for nature reserves prepared according to DB11 / 1054 "Emission Standard of Air Pollutants for Cement Industry" and GB 18587-2001 "Determination of Volatile Organic Compounds in Building Materials by Gas Chromatography" is shown in Table 3 below.

[0100] Table 3

[0101]

[0102] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A composite material for green and environmentally friendly roads in nature reserves, characterized in that, By weight, it includes 60-100 parts mixed soil, 0.5-2 parts sodium lignosulfonate, 2-10 parts quicklime, 2-9 parts mixed latex, 1-20 parts plant fiber and 2-20 parts water; The mixed soil is made from the following raw materials in parts by weight: 1-6 parts clay, 3-6 parts sand and 0.5-6 parts recycled glass powder; The mixed latex is made from the following raw materials in the following weight ratios: 20-40 parts glutinous rice glue, 30-60 parts pulp material and 5-15 parts natural rubber liquid; The pulp material is made from the following raw materials in the following weight ratios: 40-80 parts of substandard paper, 10-25 parts of hardwood fiber, and 1-8 parts of eucalyptus oil. The specific preparation method of the pulp material is as follows: after impregnating the substandard paper and hardwood fiber, the pulp is fed into a crusher and crushed into fragments. Water is then added to the fragments and mixed evenly to make primary pulp. The pulp is then subjected to a rubbing and fiber separation process. The concentration of the primary pulp is adjusted and the latex is eliminated. After adding 1-8 parts of eucalyptus oil, the pulp is beaten to produce the pulp material.

2. The composite material for green and environmentally friendly roads in nature reserves according to claim 1, characterized in that, The plant fiber is one or more of wood fiber, hemp fiber, and bamboo fiber.

3. A method for preparing a composite material for green and environmentally friendly roads in nature reserves according to claim 1 or 2, characterized in that, Includes the following steps: Preparation of recycled glass powder: The glass is crushed separately using a ball mill to produce recycled glass powder with a particle size range of 21-75 micrometers; Preparation of pulp materials: 40-80 parts waste paper and 10-25 parts hardwood fiber are impregnated and fed into a shredder to be crushed into fragments that can pass through a sieve with a pore size of 1-4 cm. Water is then added to the fragments and mixed evenly to produce a primary pulp with a concentration of 35 wt%. This primary pulp is then subjected to a twin-screw mill for refining and separating the fibers. Both screws of the twin-screw mill have a diameter of 80 mm, a rotation speed of 140-160 r / min, and rotate in the same direction. The screw gap between the two screws is gradually reduced from 10mm to 0.5mm along the coarse pulp conveying direction. The flow rate of the primary pulp in the twin-screw mill is 600kg / h. After fine grinding, the concentration of the primary pulp is adjusted to 3-6wt% with deionized water. The pulp is then de-latented at a temperature of 70℃ and a stirring speed of 200r / min for 40min. After adding 1-8 parts of eucalyptus oil, the pulp is beaten to a freeness of 20°SR to produce pulp material. Preparation of mixed latex: Mix glutinous rice flour and water in a weight percentage ratio of 20-40%:60-80% to make glutinous rice glue. Mix glutinous rice glue, pulp material and natural rubber liquid in a weight ratio of 20-40:30-60:5-15, heat to 30-60℃, stir thoroughly and let stand for chelation for 2 hours to obtain mixed latex. Preparation of green and environmentally friendly road composite material for nature reserves: Take 60-100 parts by weight of mixed soil, stir at a stirring speed of 500 r / min, and add 0.5-2 parts by weight of sodium lignosulfonate, 2-10 parts of quicklime, 2-9 parts of mixed latex and 2-20 parts of water to the mixed soil one by one, stir for 15-30 minutes, and mix evenly to obtain green and environmentally friendly road composite material for nature reserves.

4. The application of the composite material for green and environmentally friendly roads in nature reserves according to claim 1, characterized in that, This includes roadbed and shoulder preparation, preparation of green and environmentally friendly road composite materials for nature reserves, mechanical paving, rolling and molding, finishing and compaction maintenance.

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