A design method of waterborne epoxy resin modified emulsified asphalt micro-surfacing mixture

Abstract

The application provides a water-based epoxy resin modified emulsified asphalt micro-surfacing mixture design method, which comprises the following steps: (1) taking mineral aggregate; (2) taking cationic medium slow cracking emulsified asphalt binder, and the solid content is greater than 60%; (3) preparing a water-based epoxy resin system; (4) determining the estimated oil-stone ratio of the emulsified asphalt binder used, mixing the water-based epoxy resin and the curing agent into the emulsified asphalt uniformly, determining the water amount and the cement amount of the admixture, adjusting the binder amount with the estimated oil-stone ratio as the medium value, and preparing wet wheel abrasion test standard test pieces with different oil-stone ratios, (5) forming the oil-stone ratio-wet wheel abrasion value and the oil-stone ratio-structure depth coordinate graph, and then obtaining the optimal oil-stone ratio through a balance design formula; (6) detecting whether the road performance of the micro-surfacing mixture under the optimal oil-stone ratio is qualified. The design method is simple to operate, comprehensively considers the performance characteristics of the micro-surfacing mixture, and has good applicability to the water-based epoxy emulsified asphalt micro-surfacing system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road engineering, in particular to a design method of water-based epoxy resin modified emulsified asphalt micro-surfacing mixture. BACKGROUND

[0002] Micro-surfacing is the highest form of emulsified asphalt slurry coating, which is a preventive maintenance technology developed on the basis of slurry seal, and is suitable for preventive maintenance of important traffic roads such as expressways, urban trunk roads and airport runways. Micro-surfacing can improve the skid resistance of the road surface, repair slight unevenness and ruts, prevent water infiltration, prevent the aging and loosening of the road surface, thereby significantly improving the road surface performance and effectively prolonging the service life of the road surface; as a preventive maintenance technology, micro-surfacing can also be directly used for the surface wearing layer of newly built roads, thereby reducing the use of expensive stone materials, reducing the engineering cost, and significantly reducing the occurrence of early water damage; in addition, it has the advantages of convenient construction, low engineering cost, fast opening to traffic, etc., and has a very broad application prospect.

[0003] At present, the traditional micro-surfacing mixture design method mainly determines the lower limit and upper limit of the amount of binder according to the characteristics of emulsified asphalt binder, and the lower limit and upper limit of the amount of binder are determined by 1h wet wheel abrasion test and load wheel sand adhesion test. The range of the amount of binder determined by the upper and lower limits is relatively wide, and the final amount of binder is determined by experienced personnel. As a preventive maintenance skid-resistant wearing layer, the traditional design method does not consider the skid-resistant performance of micro-surfacing, and the skid-resistant performance of the mixture is often not satisfied when the upper limit of the binder is reached. Water-based epoxy resin modified emulsified asphalt is a high-performance emulsified asphalt binder generated by curing reaction of water-based epoxy modifier in emulsified asphalt dispersion medium to form a continuous network structure, which has excellent aggregate adhesion characteristics, bonding strength, high-temperature deformation resistance, and its micro-surfacing mixture has good anti-stripping performance and water stability. Because the strength of the cured binder is high and the binder loses its stickiness, the results obtained by using the traditional load wheel sand adhesion test are low, and this method cannot accurately determine the upper limit range. Therefore, the traditional micro-surfacing mixture design method has certain limitations for the mix proportion design of water-based epoxy resin modified emulsified asphalt micro-surfacing mixture. SUMMARY

[0004] In view of the problems in the prior art, the present application aims to provide a water-based epoxy resin modified emulsified asphalt micro-surfacing mixture design method, which is simple to operate and takes into account the performance characteristics of micro-surfacing mixture, and has good applicability for water-based epoxy emulsified asphalt micro-surfacing system.

[0005] The present application is achieved by the following technical scheme: a water-based epoxy resin modified emulsified asphalt micro-surfacing mixture design method, characterized in that it comprises the following steps:

[0006] (1) According to the "Technical Specification for Construction of Highway Asphalt Pavement", the mineral aggregate is taken, and the gradation of the mineral aggregate is determined;

[0007] (2) According to the "Micro-surfacing and Slurry Seal Technical Guidelines", the cationic medium slow crack emulsified asphalt binder with a solid content greater than 60% is taken;

[0008] (3) Prepare a water-based epoxy resin system with excellent compatibility with cationic emulsified asphalt;

[0009] (4) Determine the estimated oil-stone ratio of the emulsified asphalt binder according to the gradation of the mineral aggregate, mix the water-based epoxy resin and the curing agent into the emulsified asphalt at the same time, and mix uniformly to conduct mixing test and cohesion test, determine the water quantity and the amount of cement admixture; and adjust the amount of binder with the estimated oil-stone ratio as the median to make wet wheel abrasion test standard test pieces with different oil-stone ratios, after curing, cool and wait for use;

[0010] The determination method of the estimated oil-stone ratio is:

[0011] ω 预 = (0.06A + 0.12B + 0.2C) × P

[0012] In the formula, ω is the estimated oil-stone ratio (%), A is the mass percentage (%) of the mineral material with a particle size greater than 2.36 mm to the total mineral material, B is the mass percentage (%) of the mineral material with a particle size of 0.075-2.36 mm to the total mineral material, C is the mass percentage (%) of the mineral material with a particle size less than 0.075 mm to the total mineral material, and P is the residual content of emulsified asphalt;

[0013] (5) Perform wet wheel abrasion test and texture depth test, record the wet wheel abrasion value and texture depth under different oil-stone ratios, form the oil-stone ratio-wet wheel abrasion value and oil-stone ratio-texture depth coordinate graph, and then obtain the optimal oil-stone ratio through the balance design formula;

[0014] The determination of the optimal oil-stone ratio is:

[0015]

[0016] In the formula, ω is the optimal oil-stone ratio (%).

[0017] ω1 is the lower limit corresponding to the 400g / m 2 abrasion value based on the oil-stone ratio-wet wheel abrasion value graph with oil-stone ratio as the horizontal coordinate and wet wheel abrasion value as the vertical coordinate;

[0018] ω2 is the upper limit corresponding to the 0.50mm texture depth based on the oil-stone ratio-texture depth graph with oil-stone ratio as the horizontal coordinate and texture depth as the vertical coordinate;

[0019] (6) check whether the road performance of the micro-surfacing mixture under the optimal oil stone ratio is qualified, if yes, determine that the mix ratio is designed, if not, return to step (1) to redesign.

[0020] In the above scheme, the method is suitable for a modified emulsified asphalt system with a water-based epoxy resin content of 3-10%.

[0021] In step (1) of the above scheme, the mineral aggregate includes one or more of the following: limestone, granite, diabase, and basalt.

[0022] In step (3) of the above scheme, the water-based epoxy resin system is two-component, the A component is a water-based epoxy resin with a solid content of not less than 45%, and the B component is a water-soluble modified amine curing agent, and the mass ratio of the AB components is 2:1.

[0023] In step (4) of the above scheme, five oil stone ratios are taken at intervals of 0.5% with the estimated oil stone ratio as the median value to prepare wet wheel abrasion standard test pieces.

[0024] In the above scheme, the performance of the micro-surfacing mixture under the optimal oil stone ratio is verified, including 6d wet wheel abrasion performance, anti-skid performance, anti-rutting performance, and anti-permeability performance.

[0025] In the above scheme, the water amount is 5-7%, and the cement amount of the external admixture is 1%.

[0026] Beneficial effects: The present application is aimed at the difficulty of determining the upper limit value of water-based epoxy resin modified emulsified asphalt by using the load wheel sand adhesion test in the existing micro-surfacing mixture design method, and the anti-skid performance of the micro-surfacing mixture is not considered in the design index, based on the characteristics of the water-based epoxy resin modified emulsified asphalt material, a water-based epoxy resin modified emulsified asphalt micro-surfacing mixture design method based on the wet wheel abrasion test and the construction depth test is proposed. The design method is simple to operate, and the performance characteristics of the micro-surfacing mixture are considered comprehensively, and it has good applicability to the water-based epoxy emulsified asphalt micro-surfacing system. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the optimal oil stone ratio-performance graph in Example 1.

[0028] Figure 2 It is the optimal oil stone ratio-performance graph in Example 2.

[0029] Figure 3 It is the optimal oil stone ratio-performance graph in Example 3. DETAILED DESCRIPTION

[0030] The present application will be further described below in combination with examples and drawings.

[0031] The application relates to a design method of a water-based epoxy resin modified emulsified asphalt micro-surfacing mixture.

[0032] The method comprises the following steps:

[0033] (1) According to the Technical Specification for Construction of Highway Asphalt Pavement, mineral aggregates are taken, and the gradation of the mineral aggregates is determined; the mineral aggregates include one or more of the following: limestone, granite, diabase and basalt.

[0034] (2) According to the Technical Guide for Micro-surfacing and Slurry Seal, cationic medium slow crack emulsified asphalt binder with a solid content greater than 60% is taken;

[0035] (3) A water-based epoxy resin system with excellent compatibility with the cationic emulsified asphalt is prepared; the water-based epoxy resin system is two-component, the A component is water-based epoxy resin with a solid content not less than 45%, and the B component is a water-soluble modified amine curing agent, and the mass ratio of the A component to the B component is 2:1.

[0036] (4) The estimated oil-stone ratio of the emulsified asphalt binder is determined according to the gradation of the mineral aggregates, the water-based epoxy resin and the curing agent are simultaneously added into the emulsified asphalt and uniformly mixed, mixing tests and cohesion tests are carried out, the water amount and the cement amount of the external additive are determined; the water amount is 5-7%, and the cement amount of the external additive is 1%. The amount of the binder is adjusted with the estimated oil-stone ratio as the medium value, wet wheel abrasion test standard test pieces with different oil-stone ratios are prepared, and the wet wheel abrasion test standard test pieces are cooled after aging (the test pieces are placed in an oven with a temperature of 60 DEG C + / - 3 DEG C and baked until the weight is constant, generally not less than 16h, and then taken out and cooled to room temperature); specifically, the estimated oil-stone ratio is taken as the medium value, and five oil-stone ratios are taken at intervals of 0.5% to prepare the wet wheel abrasion standard test pieces.

[0037] The determination method of the estimated oil-stone ratio is as follows:

[0038] ω 预 = (0.06A + 0.12B + 0.2C) * P

[0039] In the formula, ω is the estimated oil-stone ratio (%), A is the mass percentage (%) of the mineral material with a particle size greater than 2.36mm in the total mineral material, B is the mass percentage (%) of the mineral material with a particle size of 0.075-2.36mm in the total mineral material, C is the mass percentage (%) of the mineral material with a particle size less than 0.075mm in the total mineral material, and P is the residual content of the emulsified asphalt;

[0040] (5) The wet wheel abrasion test and the texture depth test are carried out on the wet wheel abrasion test pieces after the end of the curing, and the wet wheel abrasion values and the texture depths under different oil-stone ratios are recorded to form the oil-stone ratio-wet wheel abrasion value and oil-stone ratio-texture depth coordinate graphs, and the best oil-stone ratio is obtained through a balance design formula.

[0041] The optimum oil aggregate ratio is determined as follows:

[0042]

[0043] wherein ω is the optimum oil aggregate ratio, %.

[0044] ω1 is the oil aggregate ratio corresponding to the 400 g / m2 abrasion value obtained from the oil aggregate ratio- abrasion value graph based on the oil aggregate ratio as the horizontal coordinate and the wet wheel abrasion value as the vertical coordinate; 2 the oil aggregate ratio corresponding to the abrasion value is the lower limit;

[0045] ω2 is the oil aggregate ratio corresponding to the 0.50 mm construction depth obtained from the oil aggregate ratio- construction depth graph based on the oil aggregate ratio as the horizontal coordinate and the construction depth as the vertical coordinate;

[0046] (6) Determine whether the road performance of the micro-surfacing mixture at the optimum oil aggregate ratio is qualified, if yes, determine that the mixture design is completed, if not, return to step (1) to redesign. The performance of the micro-surfacing mixture at the optimum oil aggregate ratio is verified, including the 6d wet wheel abrasion performance, the anti-skid performance, the anti-rutting performance and the anti-permeation performance.

[0047] Example 1:

[0048] The performance of the three grades of aggregate with particle sizes of 5-10 mm, 3-5 mm and 0-3 mm and the mineral powder is tested according to the specific steps of the above embodiment, wherein the coarse and fine aggregates are both limestone, and the mineral aggregate performance meets the technical specifications; a two-component water-based epoxy resin is used as the modifier, wherein the performance of component A (epoxy component) is shown in the following table; the emulsified asphalt used is a cationic slow cracking emulsified asphalt binder with a solid content of 60.8% and performance meeting the technical requirements of the Technical Guidelines for Micro-surfacing and Slurry Seal; MS-3 grading is used as the design grading, and the final synthetic grading is shown in the following table.

[0049] Basic performance of water-based epoxy resin component A (Example 1)

[0050] Appearance Solids content Epoxy value PH value Opalescent viscous liquid 48.3％ 0.18 6.3

[0051] MS-3 grading (Example 1)

[0052]

[0053] ω 预 = (0.06A + 0.12B + 0.2C) x P

[0054] In the formula, ω is the estimated oil-stone ratio (%), A is the mass percentage of the aggregate with particle size greater than 2.36 mm in the total aggregate 42.7 (%), B is the mass percentage of the aggregate with particle size between 0.075 and 2.36 mm in the total aggregate 45.9 (%), C is the mass percentage of the aggregate with particle size less than 0.075 mm in the total aggregate 11.4 (%), and P is the residue content of the emulsified asphalt (60.8 %);

[0055] According to the estimated oil-stone ratio formula, the oil-stone ratio is about 6.3 %, the A component is water-based epoxy with a dosage of 3 % (mass percentage of the binder system), the B component is a water-soluble modified amine curing agent, the mass ratio of the AB components is 2:1, the total water consumption is 5 %, and the cement dosage is 1 %; the estimated binder dosage is taken as the median value, five oil-stone ratios (5.3 %, 5.8 %, 6.3 %, 6.8 %, and 7.3 %) are taken at intervals of 0.5 %, wet wheel abrasion standard test pieces are prepared, and the test pieces are placed in a 60 °C oven for curing until the weight is constant; the cooled test pieces are placed in a 25 °C water bath for 1 h, and then the wet wheel abrasion test is performed to obtain the oil-stone ratio- abrasion value relationship curve; the dry wet wheel abrasion test pieces are taken to measure the structure depth by the sand paving method to obtain the oil-stone ratio-structure depth relationship curve, and the results are shown in Figure 1 2 The oil-stone ratio corresponding to the abrasion value is the lower limit (ω1≈6.0 %), the oil-stone ratio corresponding to the 0.50 mm structure depth is the upper limit (ω2≈7.0 %), and the optimal oil-stone ratio is calculated according to the balance design formula:

[0056]

[0057] 6.5 % is taken as the optimal oil-stone ratio, and the micro-surfacing mixture is prepared, the 6d wet wheel abrasion performance, anti-skid performance, anti-rutting performance, and anti-permeability performance of the micro-surfacing test piece are verified according to the “Standard Test Methods for Asphalt and Asphalt Mixtures” (JTG E20-2011).

[0058] Example 2

[0059] The performance of the aggregate with particle sizes of 5-10 mm, 3-5 mm, and 0-3 mm and the mineral powder is tested according to the specific steps of the above embodiments, the coarse aggregate is basalt, the fine aggregate is limestone, and the mineral aggregate performance meets the technical specifications; the two-component water-based epoxy resin is used as a modifier, the performance of the A component (epoxy component) is shown in the table, the emulsified asphalt used is a cationic medium- crack emulsified asphalt binder with a solid content of 62.4 % and meets the technical requirements of the “Micro-surfacing and Thin-surfacing Technical Guidelines”; and the MS-2 gradation is used as the design gradation, and the final synthetic gradation is shown in the table.

[0060] Basic performance of the water-based epoxy resin A component (Example 2)​

[0061] Appearance Solids content Epoxy value PH value Opalescent viscous liquid 51.2％ 0.20 7.6

[0062] MS-2 gradation (Example 2)

[0063]

[0064] ω 预 = (0.06A + 0.12B + 0.2C) x P

[0065] In the formula, ω is the estimated asphalt-aggregate ratio (%), A is the mass percentage of aggregate with a particle size greater than 2.36 mm to the total aggregate 27.7 (%), B is the mass percentage of aggregate with a particle size between 0.075 and 2.36 mm to the total aggregate 61.3 (%), C is the mass percentage of aggregate with a particle size less than 0.075 mm to the total aggregate 11 (%), and P is the residual content of emulsified asphalt (62.4 %).

[0066] According to the estimated asphalt-aggregate ratio formula, the asphalt-aggregate ratio is about 7.0 %, the water-based epoxy dosage is 6 % (mass percentage of the binder system), the B component is a water-soluble modified amine curing agent, the mass ratio of the AB components is 2:1, the total water consumption is 5.5 %, and the cement dosage is 1 %. The estimated binder dosage is taken as the median value, five asphalt-aggregate ratios (6.0 %, 6.5 %, 7.0 %, 7.5 %, and 8.0 %) are taken at intervals of 0.5 %, wet wheel abrasion standard test pieces are prepared, the test pieces are placed in a 60 °C oven for curing until the weight is constant, and then taken out for use; the cooled test pieces are placed in a 25 °C water bath for 1 h, and then subjected to wet wheel abrasion test, to obtain the relationship curve of the asphalt-aggregate ratio and the abrasion value; the dry wet wheel abrasion test pieces are taken, and the structure depth is measured by the sand paving method, to obtain the relationship curve of the asphalt-aggregate ratio and the structure depth, as shown in Table 1. Figure 2 2 The asphalt-aggregate ratio corresponding to the abrasion value is the lower limit (ω1≈6.6 %), the asphalt-aggregate ratio corresponding to the 0.50 mm structure depth is the upper limit (ω2≈7.5 %), and the optimal asphalt-aggregate ratio is calculated according to the balance design formula:

[0067]

[0068] 7.1 % is taken as the optimal asphalt-aggregate ratio, and a micro-surfacing mixture is prepared, and the 6d wet wheel abrasion performance, anti-skid performance, anti-rutting performance, and anti-permeability performance of the micro-surfacing test piece are verified according to the “Standard Test Methods for Asphalt and Asphalt Mixtures” (JTG E20-2011).

[0069] Example 3

[0070] ​The performance of the aggregate with particle size of 5-10 mm, 3-5 mm and 0-3 mm and the mineral powder is tested according to the specific steps of the above embodiments, wherein the coarse aggregate is granite, the fine aggregate is limestone, and the mineral aggregate performance meets the technical specification; the two-component water-based epoxy resin is used as the modifier, wherein the performance of component A (epoxy component) is shown in the following table; the used emulsified asphalt is cationic slow cracking emulsified asphalt binder with solid content of 60.8% and performance meeting the technical requirements of "Micro-surfacing and Slurry Seal Technical Guidelines". MS-3 gradation is used as the design gradation, and the following table shows the final synthesis gradation.

[0071] Basic performance of water-based epoxy resin component A (Example 3)

[0072] Appearance Solids content Epoxy value PH value Opalescent viscous liquid 52.3％ 0.21 7.2

[0073] MS-3 gradation (Example 3)

[0074]

[0075] ω 预 = (0.06A + 0.12B + 0.2C) x P

[0076] In the formula, ω is the estimated asphalt-aggregate ratio (%), A is the mass percentage of the aggregate with particle size greater than 2.36 mm in the total aggregate 44.8 (%), B is the mass percentage of the aggregate with particle size between 0.075-2.36 mm in the total aggregate 44.2 (%), C is the mass percentage of the aggregate with particle size less than 0.075 mm in the total aggregate 11 (%), and P is the residual content of emulsified asphalt (60.8%).

[0077] According to the estimated asphalt-aggregate ratio formula, the asphalt-aggregate ratio is about 6.2%, the water-based epoxy dosage is 10% (mass percentage of the binder system), component B is a water-soluble modified amine curing agent, the mass ratio of components A and B is 2:1, the mixing test and cohesion test are carried out, the total water content is determined to be 7%, and the cement dosage is 1%. The estimated binder dosage is taken as the median value, five asphalt-aggregate ratios (5.2%, 5.7%, 6.2%, 6.7%, 7.2%) are taken at intervals of 0.5%, wet wheel abrasion standard test pieces are prepared respectively, and the test pieces are placed in a 60°C oven for curing until constant weight, and then taken out for use; the cooled test pieces are placed in a 25°C water bath for 1 h, and then the wet wheel abrasion test is carried out, the asphalt-aggregate ratio- abrasion value relationship curve is obtained; the dry wet wheel abrasion test piece is taken to measure the structure depth by the sand paving method, the asphalt-aggregate ratio-structure depth relationship curve is obtained, and the results are shown in Figure 3 The asphalt-aggregate ratio corresponding to the 400g / m2 abrasion value is taken as the lower limit (ω1≈5.6%), the asphalt-aggregate ratio corresponding to the 0.50mm structure depth is taken as the upper limit (ω2≈6.7%), and the best asphalt-aggregate ratio is calculated according to the balance design formula:

[0078]

[0079] The 6.2% is taken as the best oil-stone ratio, and the micro-surfacing mixture is prepared. According to the “Highway Engineering Asphalt and Asphalt Mixture Test Regulations” (JTG E20-2011), the micro-surfacing test piece is verified for 6d wet wheel abrasion performance, anti-skid performance, anti-rutting performance, anti-permeability performance and other road performance.

[0080] The micro-surfacing mixtures prepared in the above three examples have the performance tests shown in the following table:

[0081]

[0082] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A method for designing a waterborne epoxy resin modified emulsified asphalt microsurfacing mixture, characterized in that, The method is suitable for the modified emulsified asphalt system with waterborne epoxy resin content of 3-10%, and is designed according to the following steps: (1) According to the Technical Specification for Construction of Highway Asphalt Pavement, the mineral aggregate is taken, and the gradation of the mineral aggregate is determined; (2) According to the Technical Guide for Micro-surfacing and Thin-surfacing, the cationic medium slow crack emulsified asphalt binder is taken, and the solid content is greater than 60%; (3) The waterborne epoxy resin system with excellent compatibility with the cationic emulsified asphalt is prepared; the waterborne epoxy resin system is two components, the A component is waterborne epoxy resin and the solid content is not less than 45%, and the B component is water-soluble modified amine curing agent, and the mass ratio of the A and B components is 2:1; (4) The estimated oil-stone ratio of the emulsified asphalt binder is determined according to the gradation of the mineral aggregate, the waterborne epoxy resin system is mixed into the emulsified asphalt uniformly, the mixing test and the cohesion test are carried out, the water amount and the cement amount of the admixture are determined, the binder amount is adjusted with the estimated oil-stone ratio as the median value, five oil-stone ratios are taken at intervals of 0.5% to prepare the wet wheel abrasion standard test piece, and the wet wheel abrasion standard test piece is cooled after curing; The determination method of the estimated oil-stone ratio is as follows: ω 预 = (0.06A + 0.12B + 0.2C) x P In the formula, ω is the estimated oil-stone ratio (%), A is the mass percentage (%) of the mineral aggregate with a particle size greater than 2.36 mm in the total mineral aggregate, B is the mass percentage (%) of the mineral aggregate with a particle size of 0.075-2.36 mm in the total mineral aggregate, C is the mass percentage (%) of the mineral aggregate with a particle size less than 0.075 mm in the total mineral aggregate, and P is the residual content of the emulsified asphalt; (5) The wet wheel abrasion test and the texture depth test are carried out, the wet wheel abrasion value and the texture depth under different oil-stone ratios are recorded, the oil-stone ratio-wet wheel abrasion value and the oil-stone ratio-texture depth coordinate graph are formed, and the best oil-stone ratio is obtained through the balance design formula; The determination of the best oil-stone ratio is as follows: In the formula, ω is the best oil-stone ratio (%). ω1 is 400 g / m corresponding to the oil / stone ratio in the oil / stone ratio - abrasion value graph obtained based on the oil / stone ratio as the horizontal coordinate and the wet wheel abrasion value as the vertical coordinate 2 corresponding to the lower limit of the oil / stone ratio ω2 is the upper limit of the oil-stone ratio corresponding to the 0.50 mm texture depth in the oil-stone ratio-texture depth relationship graph obtained based on the oil-stone ratio as the horizontal coordinate and the texture depth as the vertical coordinate; (6) The road performance of the micro-surfacing mixture under the best oil-stone ratio is detected to see whether it is qualified, if yes, it is determined that the mix ratio is designed, if not, it is returned to step (1) to redesign, and the performance of the micro-surfacing mixture under the best oil-stone ratio is verified, including the 6d wet wheel abrasion performance, the anti-skid performance, the anti-rutting performance and the anti-permeability performance.

2. The method for designing a waterborne epoxy resin modified emulsified asphalt micro-surfacing mixture according to claim 1, characterized in that, In step (1), the mineral aggregate includes one or more of limestone, granite, diabase and basalt.

3. The method for designing a waterborne epoxy resin modified emulsified asphalt micro-surfacing mixture according to claim 2, characterized in that: The water amount is 5-7%, and the cement amount of the admixture is 1%.

Images