A road surface wearing layer material based on ceramic solid waste and a preparation method and application thereof

Abstract

The application discloses a kind of road surface wearing layer materials based on ceramic solid waste and its preparation method and application, belong to the technical field of pavement surface layer material in road engineering.The application solves the defects such as poor bonding effect of ceramic solid waste particles and matrix asphalt in traditional mixture process, significant attenuation of mixture water stability, and utilizes ceramic solid waste to reduce the problems caused by the decline of road performance while fully exerting the advantages of material thermal resistance characteristics and anti-skid characteristics.The application uses thermosetting epoxy asphalt as binder, replaces mineral aggregate with ceramic solid waste broken aggregate, adopts pellet pressing type construction process, so that the prepared road surface wearing layer material has good heat conductivity, and correspondingly improves the fatigue strength of wearing layer material, has excellent anti-skid performance and wear resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of ceramic solid waste based on road surface wearing layer material and its preparation method and application, belong to road surface surface layer material technical field in road engineering. BACKGROUND

[0002] Existing infrastructure develops rapidly, the mileage of expressway increases year by year, and the demand for raw material resources such as sand and gravel in road engineering is increasing, and the wear resistance and skid resistance of traditional pavement are low, which poses a great safety hazard. In particular, the old asphalt pavement will have various defects, and it will cost a lot of manpower and material resources to repave, so the cost is high. Therefore, the pavement structure regeneration treatment technology is usually used to repair the old asphalt pavement.

[0003] Ceramics are mainly made of clay and other minerals, which are fired at high temperature, and have the advantages of high hardness, good wear resistance, small thermal conductivity and other advantages. Ceramic solid waste is the main component of existing bulk solid waste, and the coarse and fine aggregates obtained by crushing can be used as raw materials for road engineering, providing new material options for sand and gravel replacement materials for road engineering. Compared with traditional asphalt mixture, ceramic asphalt mixture reduces the consumption of sand and gravel materials, improves the thermal conductivity of asphalt pavement, reduces the occurrence of rutting and other high-temperature diseases, and prolongs the service life of asphalt pavement, which has significant functional advantages. However, in practical application, there are problems such as poor adhesion of binder and ceramic aggregate, insufficient water stability of mixture, and especially the significant decrease in water stability of mixture, which is the key factor limiting the replacement ratio of ceramic solid waste in mixture.

[0004] The prior art can improve the adhesion of asphalt mortar and ceramic aggregate and improve the water stability of mixture to a certain extent by replacing part of the mineral powder with lime and adding cement paste in the mixture, but it cannot fundamentally solve the problem of performance degradation of the mixture. Therefore, in view of the optimization of raw materials, a kind of asphalt pavement surface wearing layer material based on ceramic solid waste and its preparation method are developed by selecting resin-based thermosetting binder and using pellet pressing construction process, and it is necessary to solve the contradiction between material performance and solid waste content. SUMMARY

[0005] One of the purposes of the present application is to provide a kind of ceramic solid waste based on road surface wearing layer material, to solve the defects such as poor adhesion of ceramic solid waste particles and base asphalt in traditional mixture process, significant attenuation of mixture water stability, and to reduce the problems caused by the decrease of road performance while taking advantage of the thermal resistance and skid resistance of ceramic solid waste.

[0006] The technical solution of the present application is:

[0007] A kind of ceramic solid waste based on road surface wearing layer material, including the following weight parts of raw materials: 180-260 parts of ceramic solid waste broken aggregate and 90-200 parts of thermosetting epoxy resin modified asphalt, wherein thermosetting epoxy resin modified asphalt is composed of the following components by weight parts: 20 parts of bisphenol A type epoxy resin, 6-8 parts of diluent, 20 parts of amine curing agent, 4-5 parts of toughening agent, 3-4 parts of accelerator, 6-8 parts of solubilizing agent, 20 parts of matrix asphalt.

[0008] Further limit, ceramic solid waste broken aggregate is the product after ceramic solid waste broken shaping, wherein ceramic solid waste includes one or more than two of sanitary ceramics, building ceramics, industrial ceramic solid waste mixed in any ratio.

[0009] Further limit, the crushing value of ceramic solid waste broken aggregate is ≤26%, the los angeles abrasion loss is ≤28%, and the solidity is ≤12%.

[0010] Further limit, the performance test method of ceramic solid waste broken aggregate refers to the standard "highway engineering aggregate test regulation" (JTG E42-2005).

[0011] Further limit, the particle size of ceramic solid waste broken aggregate is 1-3mm.

[0012] Further limit, the density of ceramic solid waste broken aggregate is 1800-2300kg / m 3 .

[0013] Further limit, the tensile strength of thermosetting epoxy resin modified asphalt is ≥2.0MPa, and the elongation at break is ≥100.

[0014] Further limit, the performance test method of thermosetting epoxy resin modified asphalt refers to the standard "plastic tensile property standard test method" (ASTM D638-2010).

[0015] Further limit, bisphenol A type epoxy resin includes but is not limited to one or more than two of E51, E44, E42 mixed in any ratio.

[0016] Further limit, diluent includes but is not limited to methyl methacrylate or styrene.

[0017] Further limit, amine curing agent includes but is not limited to polyamide 651, phenolic amine T31.

[0018] Further limit, toughening agent is polysulfane.

[0019] Further limit, accelerator is DMP-30.

[0020] Further limit, solubilizing agent is epoxy soybean oil or epoxy stearic acid.

[0021] Further limited, the base asphalt is 70# road petroleum asphalt or 90# road petroleum asphalt.

[0022] The second object of the present application is to provide a ceramic solid waste-based road surface wearing layer material application, in particular, for paving a road surface wearing layer.

[0023] The third object of the present application is to provide a method for preparing a road surface wearing layer using a ceramic solid waste-based road surface wearing layer material, comprising the following steps:

[0024] S1, the ceramic solid waste is washed and dried, crushed and shaped by a machine, and the crushed ceramic is sieved to obtain ceramic solid waste crushed aggregate;

[0025] S2, the base asphalt is added to 135 DEG C, and then the amine curing agent, the toughening agent, the solubilizing agent and the accelerator are sequentially added, blended and uniformly stirred to obtain component A;

[0026] S3, the bisphenol A type epoxy resin and the diluent are blended and stirred for 5-20 min to obtain component B;

[0027] S4, component A and component B are mixed and stirred for 5-10 min to obtain a thermosetting epoxy resin modified asphalt.

[0028] S5, the thermosetting epoxy resin modified asphalt is uniformly coated on the surface of the asphalt pavement, so that the surface layer of the asphalt pavement is completely covered with a layer of thermosetting epoxy asphalt adhesive layer, and then the ceramic solid waste aggregate is uniformly spread on the thermosetting epoxy asphalt adhesive layer, and a steel wheel roller is used for compaction, and the asphalt pavement road surface wearing layer is obtained after curing and forming.

[0029] The present application uses thermosetting epoxy asphalt as a binding material and ceramic solid waste crushed aggregate to replace mineral aggregate, and uses a pellet pressing construction process, so that the prepared road surface wearing layer material has good heat conductivity, and the fatigue strength of the wearing layer material is correspondingly improved, and has excellent anti-skid performance and wear resistance.

[0030] (1) The present application utilizes the relatively more voids existing in the ceramic solid waste crushed aggregate, and the characteristics of light weight and high strength (density of 1800-2300 kg / m 3 ), and prepares a wearing layer material with a density of 1.7-2.3 kg / m 3 , which is 10%-30% lower than the density of ordinary asphalt mixture road surface wearing layer, thereby reducing the self-weight of the road wearing layer structure.

[0031] (2) The present application utilizes the low thermal conductivity of the ceramic solid waste crushed aggregate, so that the thermal conductivity coefficient of the prepared road surface wearing layer material reaches 0.00065-0.00098 m2 / h, the thermal conductivity is 1.487-1.609 kJ / m·h·℃, which is 11.2% of ordinary asphalt mixture, and can reduce the temperature of the middle surface layer by 8.0-13.6℃ after paving the asphalt pavement, effectively solving the problems of insufficient high-temperature stability of traditional asphalt mixture in engineering application, frequent rutting diseases and the like.

[0032] (3) The thermosetting epoxy resin modified asphalt used as the binder of the ceramic solid waste broken aggregate effectively improves the fatigue strength of the wearing layer material, is 2.5-3 times higher than that of ordinary asphalt mixture, controls the generation and development of microcracks on the surface of the material after the road surface is subjected to the repeated load of the vehicle tire, and delays the fatigue damage of the road surface wearing layer.

[0033] (4) The thermosetting epoxy resin modified asphalt provided by the application has a three-dimensional network structure after curing, which makes the ceramic solid waste broken aggregate in the upper layer of the road surface wearing layer embedded and difficult to produce phenomena such as particle peeling, and can also strengthen the bonding between the lower surface of the road surface wearing layer and the asphalt pavement, so that the shear strength of the two reaches 1.50-2.39 MPa, can well resist the horizontal shear effect generated by the vehicle load on the road surface, avoid structural damage such as interlayer slip and aggregate particle loss, and improve the anti-adhesion and abrasion ability of the wearing layer material. The adhesion grade of the cured epoxy asphalt and the ceramic solid waste broken aggregate is evaluated by the water boiling method, and the result is 5 levels. According to the surface energy theory, the adhesion work of the epoxy asphalt and the ceramic solid waste broken aggregate is 74 mJ / m 2 , which is 12% higher than that of ordinary asphalt mixture, and the 60 min area peeling rate is 1.2%, which is 12.5% higher than that of ordinary asphalt mixture.

[0034] (5) The sanitary ceramics, building ceramics, industrial ceramics and other solid wastes are used as mineral aggregates of the road surface wearing layer material. Since a glassy structure is formed on the surface of the ceramic through the glazing process during the firing process, the wear resistance of the aggregate surface is improved, so that the wear of the loose ceramic aggregate particles in the wearing layer material and the tire friction contact surface is small, and the Los Angeles abrasion loss value is only 10.6%, and the anti-abrasive wear performance is excellent.

[0035] The wear resistance of the road surface wearing layer material is evaluated, the wet wheel abrasion test is immersed for 1h, the abrasion value is 1.9-2.3 g / m 2 , and the immersion time is 6d, the abrasion value is 12.7-15.5 g / m 2The accelerated wearing test adopts four tires with grounding area of 250mm*80mm and grounding pressure of 0.7MPa to accelerate wearing of the road surface material, and the test result shows that when the wearing circle number of the road surface wearing layer material using the ceramic solid waste reaches 10000, the mass loss is less than 1.5%, the pendulum value under the wet condition is 80-85BPN, the pendulum value decreases by 3.25 before and after wearing, and is increased by 8%-13% compared with the ordinary asphalt wearing layer material. Meanwhile, the mineral aggregate of the road surface wearing layer material using the ceramic solid waste can also solve the treatment problem of the bulk solid waste ceramic. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0037] The experimental methods used in the following examples are conventional methods unless otherwise specified. The materials, reagents, methods and instruments used are conventional materials, reagents, methods and instruments in the art unless otherwise specified, and can be obtained by commercial channels by those skilled in the art.

[0038] Example 1

[0039] The road surface wearing layer material based on ceramic solid waste in this embodiment comprises the following raw materials by weight: 180 parts of ceramic solid waste broken aggregate and 90 parts of thermosetting epoxy resin modified asphalt, wherein the thermosetting epoxy resin modified asphalt is composed of the following components by weight: 20 parts of bisphenol A type epoxy resin (E51), 8 parts of diluent (methyl acrylate), 20 parts of amine curing agent (651), 4 parts of toughening agent (polythiol), 4 parts of accelerator (DMP-30), 8 parts of solubilizing agent (epoxy soybean oil), and 20 parts of base asphalt (90# road petroleum asphalt).

[0040] The preparation method of the road surface wearing layer material based on ceramic solid waste in this embodiment is as follows:

[0041] I. The ceramic solid waste is washed and dried, broken and shaped by a machine, and the broken ceramic is sieved to 2.5mm to obtain ceramic solid waste broken aggregate;

[0042] The crushing value of the ceramic solid waste broken aggregate is less than or equal to 26%, the Los Angeles wearing loss is less than or equal to 28%, and the solidity is less than or equal to 12%, and the performance test method refers to the standard "Highway Engineering Aggregate Test Rules" (JTG E42-2005).

[0043] II. The bisphenol A type epoxy resin, diluent, amine curing agent, toughening agent, accelerator, solubilizing agent and 90# base asphalt are weighed by mass and prepared;

[0044] III. The 90# base asphalt weighed in step II is added to a reaction kettle and heated to 135℃, and the amine curing agent, toughening agent, solubilizing agent, and accelerator are sequentially added to the reaction kettle for blending and stirring to prepare the A component of the thermosetting epoxy resin modified asphalt;

[0045] IV. The bisphenol A type epoxy resin and epoxy diluent weighed in step II are blended for 10 minutes and stirred to prepare the B component of the thermosetting epoxy resin modified asphalt;

[0046] V. The A and B components of the thermosetting epoxy resin modified asphalt prepared in steps III and IV are mixed by stirring for 5 minutes according to the mass fraction of the raw materials, to prepare the thermosetting epoxy resin modified asphalt; and according to the mass of the thermosetting epoxy resin modified asphalt prepared, the ceramic solid waste crushed aggregate is weighed according to the mass fraction.

[0047] The tensile strength of the epoxy resin modified asphalt obtained is ≥2.0 MPa, and the elongation at break is ≥100, and the performance test method refers to the standard “Standard Test Methods for Tensile Properties of Plastics” (ASTM D638-2010).

[0048] VI. The thermosetting epoxy resin modified asphalt obtained in step V is uniformly coated on the surface of the asphalt pavement, until the original asphalt pavement surface layer is completely covered, to obtain a thermosetting epoxy asphalt bonding layer.

[0049] VII. The ceramic solid waste crushed aggregate is uniformly spread on the thermosetting epoxy asphalt bonding layer obtained in step VI until the bonding layer is completely covered, and after the spreading is completed, the steel wheel roller is used for compaction within the allowable time, and after compaction, the asphalt pavement surface wearing layer material is prepared after curing.

[0050] Example 2:

[0051] The difference between this example and Example 1 is that the surface wearing layer material based on ceramic solid waste includes the following raw materials by weight: 200 parts of ceramic solid waste crushed aggregate and 110 parts of thermosetting epoxy resin modified asphalt, wherein the thermosetting epoxy resin modified asphalt is composed of the following components by weight: 20 parts of bisphenol A type epoxy resin (E51), 6 parts of diluent (methyl acrylate), 20 parts of amine curing agent (651), 4 parts of toughening agent (polythiol), 3 parts of accelerator (DMP-30), 6 parts of solubilizing agent (epoxy soybean oil), and 20 parts of base asphalt (70# road petroleum asphalt); the rest of the operation process and the related parameter settings are the same as those of Example 1.

[0052] Example 3:

[0053] The difference between this example and Example 1 is that the ceramic solid waste crushed aggregate is sieved to 2.0 mm; the rest of the operation process and the related parameter settings are the same as those of Example 1.

[0054] Example 4:

[0055] The difference between this example and Example 1 is that the ceramic solid waste broken aggregate is sieved to 1.5 mm; the rest of the operation process and the involved parameter settings are the same as those of Example 1.

[0056] Comparative Example 1:

[0057] I. The ceramic solid waste is washed and dried, and is broken and shaped by a machine. The broken ceramic is sieved to 1.5 mm ceramic solid waste aggregate;

[0058] II. The asphalt (90# base asphalt) and the additive (anionic emulsifier) are weighed and added to a high-speed shearing emulsifier. The mixture is stirred at 170°C for 20 min, and then continuously sheared at a speed of 3000±200 rpm for 60 min to obtain emulsified asphalt;

[0059] III. The emulsified asphalt obtained in step II is cooled to 20°C. Water is weighed at an oil-water ratio of 65:35, and the ceramic aggregate obtained in step I is weighed at an oil-stone ratio of 7.0% and added to a mixer to be stirred uniformly to obtain micro-surfacing emulsified asphalt mixture.

[0060] IV. The micro-surfacing emulsified asphalt mixture obtained in step III is uniformly coated on the surface of the asphalt pavement until the original asphalt pavement surface layer is completely covered to obtain emulsified asphalt micro-surfacing seal coat.

[0061] Comparative Example 2:

[0062] The difference between this comparative example and Example 4 is that basalt aggregate is used instead of ceramic solid waste broken aggregate, and the rest of the operation process and the involved parameter settings are the same as those of Example 1.

[0063] The specific operation process is as follows:

[0064] I. The basalt aggregate is washed and dried, and is broken and shaped by a machine. The broken basalt is sieved to 1.5 mm to obtain basalt aggregate;

[0065] II. Bisphenol A type epoxy resin 20 parts, epoxy resin diluent 8 parts, amine curing agent 20 parts, toughening agent 4 parts, accelerator 3 parts, and solubilizer 6 parts are weighed by mass, and 90# base asphalt 20 parts is weighed;

[0066] III. The 90# base asphalt weighed in step II is added to a reaction kettle and heated to 135°C. The amine curing agent, the toughening agent, the solubilizer, and the accelerator are sequentially added to the reaction kettle for blending and stirring to obtain the A component of thermosetting epoxy resin modified asphalt;

[0067] Four, the bisphenol A type epoxy resin weighed in step two is blended with an epoxy diluent for 10 minutes and stirred uniformly to prepare a B component of the thermosetting epoxy resin modified asphalt;

[0068] Five, the A and B components of the thermosetting epoxy resin modified asphalt in steps three and four are stirred and mixed for 5 minutes according to the mass fraction of the raw materials to prepare the thermosetting epoxy resin modified asphalt, and basalt aggregate is weighed according to the mass fraction of the thermosetting epoxy resin modified asphalt prepared;

[0069] Six, the thermosetting epoxy resin modified asphalt obtained in step five is uniformly coated on the surface of the asphalt pavement until the original asphalt pavement surface layer is completely covered to obtain a thermosetting epoxy asphalt bonding layer;

[0070] Seven, the basalt aggregate is uniformly spread on the thermosetting epoxy asphalt bonding layer obtained in step six until the bonding layer is completely covered, and after the spreading is completed, the steel wheel roller is used for compaction within the allowable time, and the asphalt pavement surface wearing layer material is prepared after compaction and curing.

[0071] Effect example:

[0072] The asphalt pavement surface wearing layer materials prepared in examples 1-4 and comparative examples 1-2 are characterized, and the specific test process is as follows:

[0073] One, the adhesion grade of the binder and aggregate is determined according to the “Highway Engineering Aggregate Test Regulations” JTG E42-2005;

[0074] Two, the size of the test piece is 300mm×300mm×50mm, the wet wheel abrasion value of the asphalt pavement surface wearing layer after immersion for 1h and 6d is determined according to the “Micro-surfacing and Slurry Seal Technology Guide”;

[0075] Three, the size of the test piece is 300mm×300mm×50mm, the deflection value of the asphalt pavement wearing layer is determined according to the “Highway Subgrade and Pavement Field Test Regulations” JTG 3450-2019, and the number of abrasions when the deflection value decays to 10% is calculated;

[0076] Four, the size of the test piece is 300mm×300mm×50mm, the indoor irradiation system is carried out using a 40W iodine tungsten lamp, and the temperature difference between the upper and lower surfaces of the ceramic solid waste wearing layer material after 8h is determined.

[0077] The test results are shown in Table 1 below:

[0078]

[0079] From the above Table 1, it can be seen that the wet wheel abrasion value, abrasion resistance life, thermal resistance and cooling performance of the road surface abrasion layer material based on ceramic solid waste prepared by the application are all superior to those of the comparative examples.

[0080] The above merely provides the preferred embodiments of the application, and as a person of ordinary skill in the art can make proper changes and modifications to the above embodiments, the application is not limited to the specific embodiments described above, and some modifications and changes of the application shall fall within the protection scope of the claims of the application.

Claims

1. A road surface wear layer material based on ceramic solid waste, characterized in that, It is composed of the following raw materials in parts by weight: 180-260 parts of crushed ceramic solid waste aggregate and 90-200 parts of thermosetting epoxy resin modified bitumen, wherein the thermosetting epoxy resin modified bitumen is composed of the following components in parts by weight: 20 parts of bisphenol A type epoxy resin, 6-8 parts of diluent, 20 parts of amine curing agent, 4-5 parts of toughening agent, 3-4 parts of accelerator, 6-8 parts of solubilizer, and 20 parts of base bitumen; The crushing value of the ceramic solid waste crushed aggregate is ≤26%, the Los Angeles abrasion loss is ≤28%, the soundness is ≤12%, and the particle size is 1-3mm; The toughening agent is polythiol; the accelerator is DMP-30; the solubilizer is epoxidized soybean oil or epoxidized stearic acid; and the base asphalt is 70# or 90# road petroleum asphalt.

2. The road surface wear layer material based on ceramic solid waste according to claim 1, characterized in that, Ceramic solid waste crushed aggregate is the product of ceramic solid waste after crushing and shaping. Ceramic solid waste includes one or more types of sanitary ceramics, building ceramics, and industrial ceramic solid waste mixed in any proportion.

3. An application of the road surface wear layer material based on ceramic solid waste as described in claim 1, characterized in that, Used for paving the wear layer of road surfaces.

4. A method for preparing a road surface wearing layer using the road surface wearing layer material based on ceramic solid waste as described in claim 1, characterized in that, The steps are as follows: S1, the ceramic solid waste is cleaned and dried, crushed and shaped by machine, and the crushed ceramics are screened to obtain ceramic solid waste crushed aggregate; S2, after heating the base asphalt to 135℃, add the amine curing agent, toughening agent, solubilizer and accelerator in sequence, mix and stir evenly to obtain component A; S3, mix bisphenol A type epoxy resin and diluent for 5-20 minutes to obtain component B; S4. Mix and stir components A and B for 5-10 minutes to obtain thermosetting epoxy resin modified asphalt. S5 involves uniformly applying thermosetting epoxy resin modified asphalt to the surface of the asphalt pavement, so that the surface layer of the asphalt pavement is completely covered with a layer of thermosetting epoxy asphalt bonding layer. Then, ceramic solid waste aggregate is evenly spread on the solid epoxy asphalt bonding layer, and compacted using a steel wheel roller. After compaction, the asphalt pavement surface wearing course is obtained through curing.

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