Road waterborne epoxy permeability testing device, evaluation and prediction method

Abstract

The application discloses a kind of road water-based epoxy permeability testing device, evaluation and prediction method, belong to road water-based epoxy material permeability detection field, its principle is to let road water-based epoxy in empty and constant temperature conditions Self through quantitative standard sand, by monitoring certain time and the height of the height of the standard sand column body that penetrates through in temperature, combined with the mass of injected water-based epoxy Quantitatively determine the permeability coefficient of water-based epoxy and evaluate its permeability size.Using this device and this method can unify the test conditions of water-based epoxy permeability, can accurately measure the maximum effective penetration depth value of cementing material, and can be applied to various combination scenarios.This method is simple in principle, easy to implement, green and environmentally friendly, widely applicable, highly practical, highly accurate, rapid, efficient and easy to observe, with uniformity and generalizability, etc.

Description

Technical Field

[0001] This invention relates to the field of water-based epoxy material permeability testing, specifically to a water-based epoxy permeability testing device, evaluation and prediction method. Background Technology

[0002] Currently, in the field of road engineering materials, road bonding materials are no longer limited to traditional asphalt materials. Polymer bonding materials have gradually gained attention and widespread application due to their excellent performance and environmental benefits. Epoxy materials are among the most widely used polymer bonding materials, having been applied in mega-projects such as the Hong Kong-Zhuhai-Macau Bridge and the Nansha Bridge. Waterborne epoxy materials are currently abundant and have a wide range of applications, especially in the road materials field. As a binder, waterborne epoxy has begun to be used in asphalt pavement bonding layers, bridge deck bonding layers, asphalt-to-asphalt pavement bonding layers, micro-surfacing, fog seal, chip seal, cold mix, stored-grade mixtures, and cold recycled mixtures. However, as a road bonding material, it currently lacks specific application index requirements for different construction scenarios, usage environments, and functional positioning. A complete performance evaluation system for road waterborne epoxy materials has not yet been established. Furthermore, the lack of high-precision prediction methods and vague technical index requirements in the field of permeability testing of road waterborne epoxy materials hinders the further promotion and development of waterborne epoxy materials in the road materials field.

[0003] In practical engineering applications, the permeability of the bonding material itself is closely related to the quality of construction and use. The incorporation of epoxy resin into waterborne epoxy resins alters their penetration depth, leading to unintended bonding effects between the constituent materials. Excessive epoxy resin incorporation reduces the overall fluidity of the bonding material, decreasing the effective penetration depth and making it difficult for the various pavement layers and materials to form a cohesive whole. This weakens the pavement's resistance to water and temperature damage, and in the early stages of service, it easily leads to surface spalling, cracking, and blistering, severely impacting the pavement's service quality. Conversely, excessive effective penetration depth not only results in excessive material permeability, hindering cost control, but also leads to poor overall structural bond strength due to reduced bonding material content in the upper pavement layers, significantly affecting pavement lifespan. Therefore, for the sake of controlling engineering costs and improving engineering quality in practical engineering, accurately testing, evaluating, comparing, and predicting the permeability of different waterborne epoxy materials for road construction under different construction environments, temperature, porosity, and dilution levels is crucial for the continued expansion and application of waterborne epoxy materials in the road sector.

[0004] Existing testing devices and evaluation methods for the permeability performance of adhesive materials are not only time-consuming to conduct experiments, but also lack precise temperature control and standardized testing materials, resulting in inconsistent results. Large-diameter aggregates cause increased porosity fluctuations within the specimens, and the uneven microstructure leads to varying internal penetration depths. Even the penetration depth of individual specimens varies considerably, resulting in significant randomness in comparing material permeability performance and introducing centimeter-level errors. Therefore, it is impossible to accurately determine the maximum effective penetration depth of adhesive materials. Consequently, existing testing devices and evaluation methods are suitable for permeability testing during road engineering acceptance, but not for the initial research, selection, and assembly design of pavement adhesive materials. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a device for testing, evaluating, and predicting the permeability of water-based epoxy for road use. By adopting this structure and method, the testing conditions for the permeability of water-based epoxy can be standardized, the experimental cycle is short, the permeability performance of water-based epoxy materials for road use can be uniformly evaluated in actual construction, and the maximum effective permeation depth of the bonding material can be accurately measured. It is applicable to various combination scenarios.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A water-based epoxy permeation performance testing device for road surfaces includes a permeation sub-tube and a constant temperature master tank;

[0008] The permeation tube includes permeation tube segment A and permeation tube segment B, which are connected to form a hollow cylindrical structure.

[0009] The bottom of the cylindrical structure is provided with a nut base, which is connected to the cylindrical structure by threads;

[0010] The bottom of the nut base is provided with an isolation net;

[0011] The constant temperature mother tank includes a tank body, an insulated cover, and an electric heating base;

[0012] The top of the tank is connected to the heat-insulating cover, and the bottom is connected to the electric heating base;

[0013] The electric heating base is equipped with a permeation tube support and a temperature-regulating fan.

[0014] The permeable tube support has multiple permeable tube fixing holes arranged in a circumferential direction; the permeable tube fixing holes are used to fix the permeable tubes.

[0015] The temperature-regulating fan is located in the center of the permeate tube support;

[0016] A temperature controller and a time controller are installed on the outer wall of the tank.

[0017] The temperature controller and the time controller are respectively connected to the temperature-regulating fan.

[0018] Furthermore, the inner wall of the permeate tube segment A or the permeate tube segment B is provided with scale lines.

[0019] Furthermore, the permeate tube segment A and the permeate tube segment B are connected by a first reset hole and a second reset hole; both the first reset hole and the second reset hole are hemispherical structures.

[0020] Furthermore, the bottom of the electric heating base is provided with three leveling supports; a leveling gauge is provided on the outer wall of the tank, and the leveling gauge is located below the time controller.

[0021] Furthermore, the time controller includes a time display, an increment button, and a decrement button.

[0022] Furthermore, indicator lights are provided on the outer wall of the tank.

[0023] Furthermore, it also includes a uniform pouring funnel and a leveler;

[0024] The uniform injection funnel is used to inject standard sand into the permeation sub-tube;

[0025] The leveler is used to rotate and level the standard sand.

[0026] Furthermore, both the permeation sub-tube and the constant temperature mother tank are made of stainless steel;

[0027] The permeation tube has a diameter of 23 mm, a height of 195 mm, and a wall thickness of 3 mm.

[0028] The nut base has a diameter of 23mm, a height of 20mm, and a wall thickness of 3mm;

[0029] The isolation net consists of two layers, arranged vertically. The upper layer of the net is 1.5mm thick with a mesh size of 3mm, while the lower layer is 1mm thick with a mesh size of 0.3mm.

[0030] The constant temperature mother tank has a diameter of 220mm, a height of 300mm, and a wall thickness of 20mm.

[0031] The height of the permeation tube support is 45mm;

[0032] The number of fixing holes in the permeation tube is 8, the hole diameter is 23.5mm, and they are vertically distributed around the temperature uniform fan.

[0033] A method for evaluating the permeability of water-based epoxy resin for road use, based on the aforementioned water-based epoxy resin permeability testing device, includes the following steps:

[0034] S1, weigh water-based epoxy, weigh standard sand and heat it for later use; apply release agent to the inside of permeation sub-tube section A and permeation sub-tube section B respectively, after assembly, screw in the nut base with the release net at the bottom, and the permeation sub-tube assembly is completed;

[0035] S2, add standard sand into the permeation sub-tube for leveling, place the permeation sub-tube in a constant temperature mother tank for heating, and remove the permeation sub-tube when the standard sand reaches the preset temperature;

[0036] S3, pour waterborne epoxy into the permeation sub-tube within a preset time, and calculate the actual injected mass G of waterborne epoxy in the permeation sub-tube;

[0037] S4. Insert the permeation tube into the permeation tube fixing hole of the constant temperature mother tank, cover it with the heat preservation cover, and adjust the heating temperature and time of the uniform temperature fan through the temperature controller and time controller to start the permeation experiment.

[0038] S5, remove the permeation tube, remove and clean the mortar column, divide the mortar column into n equal parts, and measure the water-based epoxy permeation depth of each part of the mortar column to obtain the permeation depth test value d. i Where i takes values ​​from 1 to n, and n is a positive integer;

[0039] S6, based on the permeability coefficient formula, the injection mass G of the waterborne epoxy, and the test value d of the permeation depth. i The standard permeability coefficient H was calculated. 标 The formula for the permeability coefficient is as follows:

[0040]

[0041] S7. Repeat S1-S6 multiple times to obtain multiple sets of standard permeability coefficients. Take the average value of multiple sets of standard permeability coefficients as the final permeability coefficient. Evaluate the permeability performance of waterborne epoxy through the final permeability coefficient.

[0042] A method for predicting the permeability of water-based epoxy resin for road use, based on the aforementioned method for evaluating the permeability of water-based epoxy resin for road use, includes the following steps:

[0043] The first step, based on the principle of controlling variables, is to calculate the correspondence between the actual permeation and the standard permeation of waterborne epoxy at the corresponding temperature, porosity and dilution degree, respectively, and obtain the temperature relationship, porosity relationship and dilution degree relationship;

[0044] The second step involves obtaining the temperature reduction factor K of the waterborne epoxy to be tested based on the relationships between temperature, porosity, and dilution. t, void reduction factor K k and dilution reduction factor K X ;

[0045] The third step is to obtain the standard permeability coefficient H of the waterborne epoxy to be tested using the evaluation method for the permeability performance of road waterborne epoxy. 标 ;

[0046] The fourth step is to use the standard permeability coefficient H of the waterborne epoxy to be tested. 标 and temperature reduction factor K t , void reduction factor K k and dilution reduction factor K X The actual permeability coefficient H of the waterborne epoxy to be tested was calculated. 实 The specific formula is as follows:

[0047] H 实 =H 标 ×K x ×K t ×K k ;

[0048] Fifth step, based on the actual permeability coefficient H 实 Predict the permeability of the waterborne epoxy to be tested.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] This invention provides a water-based epoxy permeation performance testing device. The device consists of two segmented permeation sub-tubes and a nut base with an isolation mesh at the bottom, forming the permeation sub-tubes. A constant-temperature master tank is composed of a tank body, an insulated cover, an electric heating base, a temperature controller, a time controller, a temperature-regulating fan, and fixing holes for the permeation sub-tubes. The above design of the permeation sub-tubes can simulate the permeation environment during actual construction to the greatest extent possible. During the experiment, the permeation sub-tubes are placed in the constant-temperature master tank, allowing for precise control of temperature and time, and accurate measurement of the maximum effective permeation depth of the water-based epoxy. Based on this permeation depth value, the permeation performance can be accurately evaluated. This device has a simple structure, is easy to operate and maintain, and has good potential for widespread application.

[0051] Therefore, this invention has the advantages of being green and environmentally friendly, widely applicable, highly practical, highly accurate, rapid and efficient in experimentation, and easy to observe results, while also possessing uniformity and scalability.

[0052] Preferably, the inner wall of the permeation tube segment of the present invention is provided with graduation lines to facilitate accurate weighing of standard sand during the experiment.

[0053] Preferably, the present invention uses two reset holes to position the two permeate tube segments, which facilitates the combination of the two permeate tube segments and saves experimental preparation time.

[0054] Preferably, the present invention includes a leveling support and a leveling rod. By cooperating with the leveling support and the leveling rod, the upper sand surface and the adhesive surface inside the tube of the water-based epoxy are kept horizontal during the injection process, thereby improving the accuracy of the experiment.

[0055] Preferably, the time controller of the present invention includes a time display, an increment button, and a decrement button, which facilitates adjustment at any time according to the needs of the experimental environment.

[0056] Preferably, the present invention also includes a uniform injection funnel and a leveler. The uniform injection funnel is used to minimize the segregation of standard sand inside the pipe, and the size of the uniform injection funnel is controlled to effectively prevent water-based epoxy from adhering to the pipe wall of the permeation sub-pipe during injection. At the same time, the leveler is used for rotational leveling instead of manual flattening, which can reduce the risk of excessive changes in sand density due to human error during the leveling process, thereby affecting the accuracy of the permeation results.

[0057] Preferably, the present invention provides two layers of metal isolation mesh at the bottom of the permeation sub-tube. Both layers of isolation mesh are breathable. The lower isolation mesh mainly serves a supporting function, while the upper isolation mesh serves an isolation function. In this way, the breathable environment in the actual construction process can be simulated to the greatest extent, preventing air bubbles in the tube from rising during the infiltration process and affecting the uniformity of the infiltration process.

[0058] This invention also provides a method for evaluating the permeability of water-based epoxy for road use. Based on the aforementioned water-based epoxy permeability testing device, this method uses standard sand, which is environmentally friendly, similar to actual adhesion scenarios, and has stable porosity, as the permeability measurement medium. This improves the accuracy of the permeability test from the traditional centimeter level to the millimeter level. The principle is to allow the water-based epoxy to permeate a quantitative amount of standard sand under air-permeable and constant-temperature conditions. By monitoring the height of the mortar mixture column permeating the standard sand within a certain time and temperature, and combining this with the mass of injected water-based epoxy, the permeability coefficient of the water-based epoxy is quantitatively determined, thereby evaluating its permeability performance. This method can standardize the testing conditions for water-based epoxy permeability performance, accurately measure the maximum effective permeation depth of the bonding material, and is applicable to various combination scenarios. The method is simple in principle and easy to implement.

[0059] This invention also provides a method for predicting the permeability of road-use water-based epoxy. Based on the aforementioned evaluation method for the permeability of road-use water-based epoxy, this method converts the permeation depth values ​​under actual and standard conditions by setting dilution reduction coefficients, temperature reduction coefficients, and porosity reduction coefficients. This allows for a unified comparison and evaluation of the permeability of road-use water-based epoxy materials under multiple scenario combined experimental conditions. Furthermore, this method can also be used to predict the permeation depth per unit mass of a material during actual construction based on its standard permeability coefficient, combined with the three reduction coefficients. This aims to avoid excessive or insufficient permeability performance, thereby maximizing the application of the material. Attached Figure Description

[0060] Figure 1(a) is a schematic diagram of the structure of the permeation tube provided in an embodiment of the present invention;

[0061] Figure 1(b) is a front view of the permeation tube provided in an embodiment of the present invention;

[0062] Figure 1(c) is a side view of the permeation tube provided in an embodiment of the present invention;

[0063] Figure 1(d) is a top view of the permeation tube provided in an embodiment of the present invention;

[0064] Figure 2 This is a schematic diagram of the structure of the constant temperature mother tank provided in an embodiment of the present invention;

[0065] Figure 3(a) is a front view of the uniform injection funnel provided in an embodiment of the present invention;

[0066] Figure 3(b) is a side view of the uniform injection funnel provided in an embodiment of the present invention;

[0067] Figure 3(c) is a top view of the uniform injection funnel provided in an embodiment of the present invention;

[0068] Figure 4(a) is a front view of the leveler provided in an embodiment of the present invention;

[0069] Figure 4(b) is a side view of the leveler provided in an embodiment of the present invention;

[0070] Figure 4(c) is a top view of the leveler provided in an embodiment of the present invention;

[0071] Figure 5 The permeation depth recording curves of water-based epoxy at different dilution ratios (1-2mm standard sand, 15g, 2h, 25℃) provided in the embodiments of the present invention;

[0072] Figure 6 The permeation depth recording curves of waterborne epoxy under different porosities (4; 3; 2.5, 15g, 2h, 25℃) provided for embodiments of the present invention;

[0073] Figure 7 The permeation depth recording curves of water-based epoxy at different temperatures (4; 3; 2.5, 1-2mm standard sand, 15g, 6h) provided for embodiments of the present invention;

[0074] Figure 8 Regression curves of "temperature-permeability depth" data for the first position of the permeation tube under different temperatures (4; 3; 2.5, 1-2mm standard sand, 15g, 6h) provided in the embodiments of the present invention;

[0075] Figure 9 Regression curves of "temperature-permeability depth" data for the second measurement point of the permeation sub-tube under different temperatures (4; 3; 2.5, 1-2mm standard sand, 15g, 6h) provided in the embodiments of the present invention;

[0076] Figure 10 Regression curves of "temperature-permeability depth" data for the permeation sub-tube measuring point 3 at different temperatures (4; 3; 2.5, 1-2mm standard sand, 15g, 6h) provided in the embodiments of the present invention;

[0077] Figure 11 Regression curves of "temperature-permeability depth" data from permeation tube position 4 at different temperatures (4; 3; 2.5, 1-2mm standard sand, 15g, 6h) provided in this embodiment of the invention;

[0078] Figure 12 A flowchart illustrating a method for evaluating the permeability of water-based epoxy resin in road applications, provided as an embodiment of the present invention;

[0079] Figure 13 A flowchart illustrating a method for predicting the permeability of water-based epoxy resin in road applications, provided as an embodiment of the present invention.

[0080] Figure label:

[0081] Permeation sub-tube-1; Permeation sub-tube segment A-1-1; Permeation sub-tube segment B-1-2; Scale line-1-3; First reset hole-1-4; Second reset hole-1-5; Standard sand-1-6; Thread-1-7; Nut base-1-8; Isolation mesh-1-9;

[0082] Constant temperature mother tank-2; Insulation cover-2-1; Time display-2-2; Increment button-2-3; Leveling ruler-2-4; Decrease button-2-5; Indicator light-2-6; Temperature controller-2-7; Permeation tube support-2-8; Permeation tube fixing hole-2-9; Temperature equalizing fan-2-10; Leveling support-2-11; Electric heating base-2-12. Detailed Implementation

[0083] This invention provides a water-based epoxy permeation performance testing device, comprising a permeation sub-tube 1 and a constant temperature mother tank 2;

[0084] The permeation tube 1 includes permeation tube segment A1-1 and permeation tube segment B1-2, which are connected to form a hollow cylindrical structure. A nut base 1-8 is provided at the bottom of the cylindrical structure, and the nut base 1-8 is connected to the cylindrical structure via threads 1-7. An isolation mesh 1-9 is provided at the bottom of the nut base 1-8. Scale lines 1-3 are also provided on the inner wall of either permeation tube segment A1-1 or permeation tube segment B1-2. Permeation tube segment A1-1 and permeation tube segment B1-2 are connected via a first reset hole 1-4 and a second reset hole 1-5; both the first reset hole 1-4 and the second reset hole 1-5 are hemispherical structures.

[0085] The constant temperature mother tank 2 includes a tank body, an insulated cover 2-1, and an electric heating base 2-12. The top of the tank body is connected to the insulated cover 2-1, and the bottom is connected to the electric heating base 2-12. An indicator light 2-6 is provided on the outer wall of the tank body. A permeation tube support 2-8 and a temperature equalization fan 2-10 are provided on the electric heating base 2-12. Multiple permeation tube fixing holes 2-9 are arranged in a circumferential direction on the permeation tube support 2-8. The permeation tube fixing holes 2-9 are used to fix the permeation tube 1. The temperature equalization fan 2-10 is located in the center of the permeation tube support 2-8. A temperature controller 2-7 and a time controller are provided on the outer wall of the tank body. The temperature controller 2-7 and the time controller are respectively connected to the temperature equalization fan 2-10.

[0086] In addition, three leveling supports 2-11 are provided at the bottom of the electric heating base 2-12; a leveling rod 2-4 is provided on the outer wall of the tank, and the leveling rod 2-4 is located below the time controller.

[0087] Here, the time controller includes a time display 2-2, an increment button 2-3, and a decrement button 2-5.

[0088] The water-based epoxy permeability testing device for road surfaces also includes a uniform injection funnel and a leveler; the uniform injection funnel is used to inject standard sand 1-6 into the permeation sub-tube 1; the leveler is used to rotate and level the standard sand 1-6.

[0089] The specific materials and parameters of the above components are as follows:

[0090] Both the permeation tube 1 and the constant temperature mother tank 2 are made of stainless steel.

[0091] The diameter of the permeation tube 1 is 23 mm, the height is 195 mm, and the wall thickness is 3 mm;

[0092] The diameter of the nut base 1-8 is 23mm, the height is 20mm, and the wall thickness is 3mm;

[0093] The isolation netting 1-9 consists of two layers, distributed vertically. The upper layer of isolation netting 1-9 is 1.5mm thick with a mesh size of 3mm; the lower layer of isolation netting 1-9 is 1mm thick with a mesh size of 0.3mm.

[0094] The diameter of the constant temperature mother tank 2 is 220mm, the height is 300mm, and the wall thickness is 20mm;

[0095] The height of the permeation tube support 2-8 is 45mm;

[0096] There are 8 fixed holes 2-9 in the permeation tube, with a diameter of 23.5 mm, and they are vertically distributed around the temperature uniform fan 2-10.

[0097] This invention also provides a method for evaluating the permeability of water-based epoxy resin for road use. The aforementioned water-based epoxy resin permeability testing device includes the following steps:

[0098] S1, weigh water-based epoxy, weigh standard sand 1-6 and heat it for later use; apply release agent to the inside of permeation sub-tube section A1-1 and permeation sub-tube section B1-2 respectively, after assembly, screw in the nut base 1-8 with the isolation net 1-9 at the bottom, and the permeation sub-tube 1 is assembled.

[0099] S2, add standard sand 1-6 into permeation tube 1 for leveling, place permeation tube 1 into constant temperature mother tank 2 for heating, and when standard sand 1-6 rises to the preset temperature, take out permeation tube 1;

[0100] S3, pour waterborne epoxy into permeation sub-tube 1 within a preset time, and calculate the actual injected mass G of waterborne epoxy in permeation sub-tube 1;

[0101] S4, insert the permeation tube 1 into the permeation tube fixing hole 2-9 of the constant temperature mother tank 2, cover with the heat preservation cover 2-1, and adjust the heating temperature and time of the uniform temperature fan 2-10 through the temperature controller 2-7 and the time controller to start the permeation experiment;

[0102] S5, remove the permeation tube 1, remove and clean the mortar column, divide the mortar column into n equal parts, and measure the water-based epoxy permeation depth of each part of the mortar column to obtain the permeation depth test value d. i Where i takes values ​​from 1 to n, and n is a positive integer;

[0103] S6, based on the permeability coefficient formula, the injection mass G of the waterborne epoxy, and the test value d of the permeation depth. i The standard permeability coefficient H was calculated. 标 The formula for the permeability coefficient is as follows:

[0104]

[0105] S7. Repeat S1-S6 multiple times to obtain multiple sets of standard permeability coefficients. Take the average value of multiple sets of standard permeability coefficients as the final permeability coefficient. Evaluate the permeability performance of waterborne epoxy through the final permeability coefficient.

[0106] This invention also provides a method for predicting the permeability of water-based epoxy resins for road use. Based on the above-mentioned method for evaluating the permeability of water-based epoxy resins for road use, the method includes the following steps:

[0107] The first step, based on the principle of controlling variables, is to calculate the correspondence between the actual permeation and the standard permeation of waterborne epoxy at the corresponding temperature, porosity and dilution degree, respectively, and obtain the temperature relationship, porosity relationship and dilution degree relationship;

[0108] The second step involves obtaining the temperature reduction factor K of the waterborne epoxy to be tested based on the relationships between temperature, porosity, and dilution. t , void reduction factor K k and dilution reduction factor K X ;

[0109] The third step is to obtain the standard permeability coefficient H of the waterborne epoxy to be tested using the evaluation method for the permeability performance of road waterborne epoxy. 标 ;

[0110] The fourth step is to use the standard permeability coefficient H of the waterborne epoxy to be tested. 标 and temperature reduction factor K t , void reduction factor K k and dilution reduction factor K X The actual permeability coefficient H of the waterborne epoxy to be tested was calculated. 实 The specific formula is as follows:

[0111] H 实 =H 标 ×K x ×K t ×K k ;

[0112] Fifth step, based on the actual permeability coefficient H 实 Predict the permeability of the waterborne epoxy to be tested.

[0113] Example

[0114] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0115] As shown in Figures 1(a)-1(d), this embodiment relates to a device for testing the permeability of water-based epoxy materials for road use and a preferred embodiment. Specifically, it provides a device for testing the permeability of water-based epoxy materials for road use. The main body consists of a stainless steel permeation sub-tube 1 with a total height of 195mm, a wall thickness of 3mm, a hollow interior, and an inner diameter of 23mm; a constant-temperature mother tank 2 capable of being heated to a maximum temperature of 200℃; a leveling device; a uniform injection funnel; and a series of supporting components. Specifically, the permeation sub-tube 1 is cylindrical, hollow inside, and the reset holes (first reset hole 1-4 and second reset hole 1-5) on the tube wall are hemispherical with a diameter of 2mm. The bottom nut base 1-8 has a diameter of 23mm, a height of 20mm, and a wall thickness of 3mm. The permeation sub-tube 1 is filled with standard sand 1-6, which is the permeation measuring medium. The bottom is equipped with two layers of metal isolation mesh 1-9. The lower isolation mesh 1-9 has a mesh size of 3mm and a thickness of 1.5mm, which serves as support and allows air to pass through. The upper isolation mesh 1-9 has a mesh size of 0.3mm and a thickness of 1mm, which serves as isolation and allows air to pass through.

[0116] like Figure 2 As shown, the constant temperature mother tank 2 is a hollow cylinder made of stainless steel, with a height of 300mm, an internal diameter of 220mm, and a wall thickness of 20mm. Inside the mother tank 2, there is a 45mm high permeable tube support 2-8 for fixing the permeable tube 1. The upper part of the permeable tube support 2-8 has eight 23.5mm diameter permeable tube fixing holes 2-9 evenly spaced in a circle, used to fix the permeable tube 1 vertically distributed around the temperature equalization fan. The permeable tube support 2-8 is hollowed out and equipped with a temperature equalization fan 2-10 to ensure uniform temperature distribution inside the mother tank 2. A temperature controller 2-7 and a time controller are located in the center of the outer periphery of the mother tank 2 for setting the experimental temperature and the constant temperature permeation time parameters. Three leveling supports 2-11 are located at the bottom of the mother tank 2, used in conjunction with the leveling rod 2-4 in the middle of the tank to ensure that the tank remains level at all times.

[0117] As shown in Figures 3(a) to 4(c), this device also includes a uniform pouring funnel and a leveler, the combination of which greatly improves the accuracy of the experimental tests of this device.

[0118] like Figure 12 As shown, the test device provided in this embodiment was used to test water-based epoxy for road use, and a method for evaluating the permeability of water-based epoxy for road use is provided. The preferred evaluation steps are as follows:

[0119] Step 1, Experimental Preparation:

[0120] To significantly differentiate the permeability of materials, 50g each of waterborne epoxy resin and curing agent: resin: diluent were prepared in mass ratios of 4:3:2, 4:3:2.4, and 4:3:2.8. Each mixture was placed in a 100mL beaker, and 15g of each was weighed into a separate 100mL beaker for later use. 1kg of standard sand (1-6) with dimensions of 0.3mm-0.5mm, 0.5mm-1mm, and 1mm-2mm was weighed and placed in a tray. The tray was then heated in an oven at 110℃±2℃ for 2 hours and placed in a drying oven for later use. The waterborne epoxy permeability testing device was placed on a horizontal operating table, and the three leveling supports 2-11 were adjusted to center the bubble on the leveling ruler 2-4 of the constant temperature mother tank 2.

[0121] Step 2, injection of experimental materials:

[0122] Disassemble the permeation tube 1 along the first reset hole 1-4 and the second reset hole 1-5. After applying a release agent to the inner sides of permeation tube segments A1-1 and B1-2, merge the two segments along the first reset hole 1-4 and the second reset hole 1-5, and rotate them into the nut base 1-8 for later use. Measure 120mm±1mm of standard sand 1-6 using a measuring cylinder of the same size as the permeation tube 1. Simultaneously, use a leveler to rotate and level the upper sand surface. Then, use a uniform pouring funnel to evenly add the standard sand 1-6 into the permeation tube 1 and level the sand surface again using a leveler. Place it in a constant temperature mother tank 2 for 30 minutes of heating treatment. When the internal standard sand 1-6 reaches 25℃, 30℃, and 35℃ respectively, remove the permeation tube 1 for later use.

[0123] Step 3, injection of the material to be tested:

[0124] Weigh 15g ± 0.1g of water-based epoxy into a 10ml beaker containing Ga(g), accurate to 0.01g. Start timing when the water-based epoxy contacts the surface of the measuring sand inside the permeation tube 1. Pour the weighed water-based epoxy into the permeation tube 1 at a uniform clockwise speed within 30s using a uniform pouring funnel containing Gb(g). Weigh the uniform pouring funnel again, and then weigh the beaker again, measuring Gc(g) and Gd(g).

[0125] Step 4, Permeation Experiment:

[0126] Insert the permeation tube 1 into the permeation tube fixing holes 2-9 inside the constant temperature mother tank 2 in sequence. Cover the top of the constant temperature mother tank 2 with the heat preservation cover 2-1. Rotate the temperature controller to the experimental temperature of 25℃, 30℃, and 35℃ in sequence, and set the constant temperature time controller to the heat preservation time of 6h. When the running indicator light is on, the permeation experiment begins.

[0127] Step 5, Result Observation:

[0128] After the insulation is completed, remove the permeation sub-tube 1 and unscrew the bottom nut base 1-8. Discharge the unbonded standard sand 1-6 from the bottom of the tube. Separate the permeation sub-tube 1, remove the solidified mortar column inside, and clean the remaining sand around it with a brush. Divide the circumference of the top surface of the mortar solid into 8 equal parts using a steel ruler. Measure the water-based epoxy permeation depth at each of the circumference divisions, estimating the value at 0.5 mm. Measure the depth in d. i (i = 1, 2, 8) represents this.

[0129] Step 6, Data Processing:

[0130] Remove the penetration depth test value d i The maximum and minimum values ​​in the test are used to calculate the arithmetic mean of the other six penetration depth test values, which is taken as the actual penetration depth result for this type of test material. After the insulation time is completed, the insulation cover is opened to start recording data. The standard permeability coefficient H is calculated using the following formula. 实 15+Ga+Gb-Gc-Gd represents the injection mass of the waterborne epoxy, and the specific formula is as follows:

[0131]

[0132] Step 7, Data Confirmation:

[0133] Repeat the above steps to repeat the sample permeability test. Take the average of the three tests as the final value of the permeability coefficient of the waterborne epoxy material, retaining two significant figures after the decimal point. The permeability statistics for the three samples are shown in Table 3. After data processing using the following formula, the standard permeability coefficients of the three materials are 0.35 mm / g, 0.17 mm / g, and 0.18 mm / g, respectively.

[0134] Thus, the permeability performance of each sample can be accurately evaluated using the standard permeability coefficient.

[0135] To incorporate permeability prediction under actual conditions, this embodiment also provides a method for predicting the permeability of water-based epoxy resins used in road surfaces, such as... Figure 13 As shown, combining the above evaluation methods, a practical prediction is made for a certain water-based epoxy to be tested. Dilution reduction factors, temperature reduction factors, and porosity reduction factors are set to convert the penetration depth values ​​between actual and standard conditions. Specifically:

[0136] First, based on the principle of controlling variables, the actual permeability and standard permeability of waterborne epoxy were calculated at the corresponding temperature, porosity and dilution degree, respectively, and the temperature relationship, porosity relationship and dilution degree relationship were obtained.

[0137] Secondly, using the principle of equal distribution, and combining the end values ​​of each interval in the reduction coefficient tables (as shown in Table 1-3), the corresponding values ​​of the three major reduction coefficients—temperature, porosity, and dilution degree—under the actual permeability test conditions of a certain water-based epoxy are determined sequentially. The standard permeability coefficient H under the test conditions is then calculated using the following formula. 标 Transformed into the permeability coefficient H under actual construction conditions 实 ;

[0138] Finally, the permeability performance of the materials was evaluated and predicted using the permeability performance evaluation table (as shown in Table 4). By referring to the table and converting using the following formula, the actual permeability coefficients of the three materials are 0.35 mm / g, 0.40 mm / g, and 0.41 mm / g, respectively. Comparison shows that material number three has the best permeability performance in its corresponding permeability environment, with a rating of medium. Material number two is in the middle and has a poor rating, while material number one has the worst permeability and a corresponding poor rating. Detailed data can be found in Table 5.

[0139] H 实 =H 标 ×K x ×K t ×K k (mm)

[0140] Here, H represents the 6-hour penetration depth of waterborne epoxy resin in 1-2mm standard sand at 25℃ and 15g, with a composition ratio of curing agent:resin:diluent of 4:3:2.5. Specific temperature-penetration depth data regression curves for different lateral positions are shown below. Figures 6 to 11 As shown.

[0141] K X ---Dilution reduction factor, see Table 1 for detailed values;

[0142] K t ---Temperature reduction factor, see Table 2 for detailed values;

[0143] K t ---Void reduction factor, see Table 3 for detailed values.

[0144] The apparatus and method provided in this embodiment have the following advantages: they are green and environmentally friendly, widely applicable, highly comparable, accurate, rapid, efficient and easy to observe results, and have the advantages of uniformity and scalability.

[0145] Table 1—Summary of Dilution Rate Reduction Factors

[0146]

[0147] Table 2—Summary of Porosity Reduction Factors

[0148]

[0149] Table 3—Summary of Porosity Reduction Factors

[0150]

[0151] Table 4—Permeability Performance Evaluation Table

[0152]

[0153]

[0154] Table 5—Data Recording Table for Waterborne Epoxy Permeability Verification Test

[0155]

[0156] Although the embodiments of the present invention have been described above in conjunction with the accompanying drawings and examples, the present invention is not limited to the specific embodiments and application fields described above. The specific embodiments described above are merely illustrative and instructive, and not restrictive. Those skilled in the art, guided by the specification, can make many other modifications without departing from the scope of the claims of the present invention, and all of these modifications are within the scope of protection of the present invention.

Claims

1. A method for evaluating the permeability of a waterborne epoxy for road use, characterized by, The method comprises the following steps: S1, weigh the water-based epoxy, weigh the standard sand (1-6) and heat it for standby; apply isolation agent to the inside of the permeation sub-pipe section A (1-1) and the permeation sub-pipe section B (1-2), respectively, after combination, screw the nut base (1-8) provided with the isolation net (1-9) into the bottom, and assemble the permeation sub-pipe (1) to complete the assembly; S2, add the standard sand (1-6) into the permeation sub-pipe (1) for leveling, and place the permeation sub-pipe (1) into the constant-temperature mother tank (2) for heating, when the standard sand (1-6) reaches the preset temperature, take out the permeation sub-pipe (1); S3, pour the water-based epoxy into the permeation sub-pipe (1) within a preset time, and calculate the actual injection mass G of the water-based epoxy in the permeation sub-pipe (1); S4, insert the permeation sub-pipe (1) into the permeation sub-pipe fixing hole (2-9) of the constant-temperature mother tank (2), cover the heat preservation cover (2-1), adjust the heating temperature and time of the uniform temperature fan (2-10) through the temperature controller (2-7) and the time controller, and start the permeation experiment; S5, taking out the permeation sub-pipe (1), taking out and cleaning the mortar column, dividing the mortar column into n equal parts, respectively measuring the water-based epoxy penetration depth of each part of the mortar column to obtain a penetration depth test value d i wherein i takes a value of 1-n, and n is a positive integer. S6, according to the permeability coefficient formula, the injection quality G of the waterborne epoxy and the penetration depth test value d i , the standard permeability coefficient is calculated , the permeability coefficient formula is specifically ； S7, repeatedly execute S1-S6 multiple times to obtain multiple groups of standard permeation coefficients, take the average value of the multiple groups of standard permeation coefficients as the final permeation coefficient, and evaluate the permeation performance of the water-based epoxy through the final permeation coefficient; The evaluation method is realized based on a road water-based epoxy permeation performance testing device, and the road water-based epoxy permeation performance testing device comprises a permeation sub-pipe (1) and a constant-temperature mother tank (2); The permeation sub-pipe (1) comprises a permeation sub-pipe section A (1-1) and a permeation sub-pipe section B (1-2), the permeation sub-pipe section A (1-1) is connected with the permeation sub-pipe section B (1-2), and a hollow cylindrical structure is formed; The bottom of the cylindrical structure is provided with a nut base (1-8), and the nut base (1-8) is connected with the cylindrical structure through threads (1-7); The bottom of the nut base (1-8) is provided with an isolation net (1-9); The constant-temperature mother tank (2) comprises a tank body, a heat preservation cover (2-1) and an electric heating base (2-12); The top of the tank body is connected with the heat preservation cover (2-1), and the bottom is connected with the electric heating base (2-12); The electric heating base (2-12) is provided with a permeation sub-pipe support (2-8) and a uniform temperature fan (2-10); A plurality of permeation sub-pipe fixing holes (2-9) are arranged in the circumferential direction of the permeation sub-pipe support (2-8); the permeation sub-pipe fixing holes (2-9) are used for fixing the permeation sub-pipe (1); The uniform temperature fan (2-10) is located in the center of the permeation sub-pipe support (2-8); The outer wall of the tank body is provided with a temperature controller (2-7) and a time controller; The temperature controller (2-7) and the time controller are connected with the uniform temperature fan (2-10), respectively.

2. The method for evaluating the permeability of a waterborne epoxy for road use according to claim 1, characterized by, The inner wall of the permeation sub-pipe section A (1-1) or the permeation sub-pipe section B (1-2) is provided with a scale line (1-3).

3. The method for evaluating the permeability of a waterborne epoxy for road use according to claim 1, characterized by, The permeation sub-pipe section A (1-1) and the permeation sub-pipe section B (1-2) are connected through a first reset hole (1-4) and a second reset hole (1-5); the first reset hole (1-4) and the second reset hole (1-5) are both hemispherical structures.

4. The method for evaluating the permeability of a waterborne epoxy for road use according to claim 1, characterized by, The bottom of the electric heating base (2-12) is provided with three leveling supports (2-11); the outer wall of the tank body is provided with a level gauge (2-4), and the level gauge (2-4) is located below the time controller.

5. The method for evaluating the permeability of a water-based epoxy pavement according to claim 1, characterized in that, The time controller includes a time display (2-2), an increase time key (2-3) and a decrease time key (2-5).

6. The method for evaluating the permeability of a water-based epoxy for road use according to claim 1, characterized by, The outer wall of the tank body is provided with an indicator light (2-6).

7. The method for evaluating the permeability of a water-based epoxy pavement according to claim 1, characterized in that, It also includes a uniform injection funnel and a leveler; The uniform injection funnel is used to inject standard sand (1-6) into the permeation sub-pipe (1); The leveler is used to rotate and level the standard sand (1-6).

8. The method for evaluating the permeability of a waterborne epoxy for road use according to claim 1, characterized by, The permeation sub-pipe (1) and the constant temperature mother tank (2) are both made of stainless steel; The diameter of the permeation sub-pipe (1) is 23 mm, the height is 195 mm, and the wall thickness is 3 mm; The diameter of the screw cap base (1-8) is 23 mm, the height is 20 mm, and the wall thickness is 3 mm; The isolation net (1-9) is 2 layers, which are distributed in an upper and lower manner, the upper isolation net (1-9) has a thickness of 1.5 mm and a mesh size of 3 mm, and the lower isolation net (1-9) has a thickness of 1 mm and a mesh size of 0.3 mm; The diameter of the constant temperature mother tank (2) is 220 mm, the height is 300 mm, and the wall thickness is 20 mm; The height of the permeation sub-pipe support (2-8) is 45 mm; The number of the permeation sub-pipe fixing holes (2-9) is 8, the hole diameter is 23.5 mm, and they are vertically distributed around the uniform temperature fan (2-10).

9. A method for predicting the permeability of a waterborne epoxy for road use, based on the method for evaluating the permeability of a waterborne epoxy for road use according to claim 1, characterized in that, The steps include: In the first step, based on the control variable principle, the corresponding relationship between the actual permeation of water-based epoxy and the standard permeation under the corresponding temperature, void ratio and dilution degree is calculated respectively, and the temperature relationship, void ratio relationship and dilution degree relationship are obtained; In the first step, based on the control variable principle, the corresponding relationship between the actual permeation of water-based epoxy and the standard permeation under the corresponding temperature, void ratio and dilution degree is calculated respectively, and the temperature relationship, void ratio relationship and dilution degree relationship are obtained; Secondly, according to the temperature relation, the porosity relation and the dilution degree relation, the temperature reduction coefficient, the porosity reduction coefficient and the dilution reduction coefficient of the water-based epoxy resin to be detected are obtained ;​​ Thirdly, the standard penetration coefficient of the waterborne epoxy to be tested is obtained by using the evaluation method of the penetration property of the waterborne epoxy for road use ; Fourth step, calculate the real permeability coefficient of the waterborne epoxy resin to be tested by the standard permeability coefficient of the waterborne epoxy resin to be tested and temperature reduction coefficient , void reduction coefficient and dilution reduction coefficient , the specific formula is as follows:​ ； Step 5, the actual permeability coefficient is determined according to the following equation The permeability of the waterborne epoxy to be tested is predicted.

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