CN116776777A - Method for estimating penetration depth of emulsified asphalt penetrating oil - Google Patents
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- 239000010426 asphalt Substances 0.000 title claims abstract description 109
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Abstract
The application discloses a method for estimating the penetration depth of emulsified asphalt penetrating layer oil, which is characterized in that according to a liquid penetration kinetics Lucas-Washburn equation, the condition that the capillary action is equal to the liquid gravity is taken, and the liquid is in an equilibrium state at the moment, so as to obtain an estimated equation of the maximum depth reached by the liquid penetration energy. The method aims at adding proper emulsified asphalt particle size index r and particle maximum accumulation rate forming time T into a liquid permeation dynamics equation, adjusting corresponding parameters, measuring corresponding values and fitting, thereby forming an estimated equation which accords with the permeation depth of emulsified asphalt penetrating oil on the cement stabilized macadam base layer.
Description
Technical Field
The application belongs to the technical field of traffic road engineering, and particularly relates to a method for estimating the penetration depth of emulsified asphalt penetrating layer oil after modification based on a penetration theory.
Background
The cement stabilized macadam base layer is a bearing layer commonly adopted by high-grade asphalt pavement, can meet the basic performance requirements of road bearing, and often adopts soil, stone and industrial waste as main raw materials, thereby having obvious technical and economic advantages. But the surface layer adopts asphalt materials, which belongs to flexible materials. The modulus and the performance of the two materials are greatly different, and the two materials are completely continuous and contradicted with the base layer and the surface layer which are considered in the design. Therefore, the connection between the two needs to be enhanced by adopting the penetrating oil, and meanwhile, the sprinkling of the penetrating oil can also solidify the cement stabilized macadam base layer to prevent the rolling damage in the construction process and play a role in water resistance.
And in the construction requirements of the penetrating oil, the most important is the penetration depth requirement of the penetrating oil in the cement stabilized macadam, and the sufficient penetration depth can ensure that the emulsified asphalt plays an effective role in the road use process. However, in daily life, the penetration effect of the penetrating oil is researched through experiments, the molding time of the water-stabilized macadam test piece is long, and the penetration depth of the penetrating emulsified asphalt on the surface of the base layer cannot be accurately measured and calculated when the penetrating emulsified asphalt is spread on the surface of the base layer and the base layer is too compact, so that the penetration performance evaluation of the penetrating oil is influenced, the relevant indexes influencing the penetration performance of the emulsified asphalt are researched and determined, a pre-estimated equation suitable for the penetration depth of the emulsified asphalt is fitted, and guidance is provided for the penetration performance research of the emulsified asphalt.
Disclosure of Invention
The technical problems to be solved are as follows: aiming at the problems that the molding time of a water-stabilized macadam test piece is long, the penetration depth of the emulsified asphalt on the surface of a base layer cannot be accurately measured and calculated when the emulsified asphalt is sprayed on a too compact base layer structure, and the like in the prior art, the application provides a method for estimating the penetration depth of the emulsified asphalt penetration oil based on the penetration theory correction.
The application adopts the following technical scheme for solving the technical problems:
a method for estimating the penetration depth of emulsified asphalt penetrating layer oil based on the modification of a penetration theory comprises the following steps:
step 1, an estimated equation of the penetration depth of emulsified asphalt penetrating oil is as follows:
wherein: h-penetration depth (mm);
θ -contact angle, °;
rho-density, kg/m 3 ；
g-gravity acceleration, g/m 2 ；
T-maximum rate of particle formation time, h;
porosity of the P-water stabilized macadam test piece,%;
r-particle size, μm;
eta-dynamic viscosity, MPa.s
a. b, c, d, e, f-parameters to be fitted;
step 2: measuring particle size index D of emulsified asphalt by laser particle sizer 50 Taking the particle size index r as a particle size index r in a pre-estimation equation;
step 3: the change curve of moisture in the drying film forming process is obtained by a normal-temperature drying film forming method through a timing weighing method, and the change curve is divided into three stages according to the emulsified asphalt drying film forming theory and the moisture change condition: the method comprises a particle filling stage, a demulsification stage and an asphalt film forming stage, wherein the intersection point of a fitting curve of the particle filling stage and a fitting line of the asphalt film forming stage is the time T of the maximum stacking rate of particles, and the time T is added into an estimated equation;
step 4: measuring the open porosity of the water-stable test piece by adopting a water immersion method; the specific method comprises the steps of firstly weighing the original weight of a water stable test piece and recording as M 1 Then take one at the topPlacing the bucket of the water outlet on the electronic scale, and continuously adding water into the bucket until the quality is no longer increased, and at the moment, zeroing the electronic scale value; then slowly putting the water stable test piece into the barrel, ensuring that water can only flow out through the water outlet at the top, then starting to stand, then continuously and slowly adding water until no bubbles are generated, and recording that the mass of the electronic scale is M after the water is added 2 The open porosity of the test piece is then calculated according to equation 2:
wherein: p (P) o -open porosity of the water stable test piece,%;
M 1 -original mass of a water stable test piece, g;
M 2 -the mass g of the water stabilization test piece after the buoyancy is subtracted;
V s solid volume of water stable test piece, cm 3 ；
ρ w Density of water, kg/m 3
Wherein M is 1 -M 2 The mass of water discharged from the solid part of the water stabilization test piece is divided by the density of the water to obtain the volume of the solid part, and the water stabilization test piece is expressed as V s The abrasion loss of the water stable test piece is ignored, the calculation is carried out according to the diameter D=15 cm and the height H=15 cm, and the volume is 2649.4cm 3 ；
Step 5: adopting an optical contact angle meter to measure the contact angle theta of the emulsified asphalt penetrating layer oil to be tested;
step 6: measuring the measured oil density rho of the strike through layer by using a density bottle;
step 7: carrying out viscosity test on the experimental sample by using a Brookfield viscometer to obtain dynamic viscosity of the emulsified asphalt;
step 8: measuring the penetration depth of the emulsified asphalt by adopting a press damage method;
step 9: selecting a plurality of emulsified asphalt, measuring the required numerical value according to the steps 2-8, and substituting the numerical value into an equation Corresponding fitting is carried out, and parameters to be fitted are determined;
step 10: and (3) obtaining corresponding values according to the steps 2-8 from the emulsified asphalt with the required estimated penetration depth, and substituting the values into an estimation equation to obtain the maximum penetration depth estimated value of the penetrating oil.
Preferably, the penetrating oil emulsified asphalt is used on a cement stabilized macadam base layer, and the particle size index r of the emulsified asphalt and the maximum stacking rate forming time T of particles are added into a liquid permeation dynamics equation; the surface tension and the contact angle in the formula have stronger relativity, and the parameter of the surface tension is not considered any more for the purpose of simplifying the formula; in addition, the emulsified asphalt is sprayed on the upper surface of the cement stabilized macadam base layer, and the width R of the index crack in the osmotic dynamics equation d The cement stabilized macadam is more suitable in terms of pore size, but the cement stabilized macadam base layer is more random in pore distribution and weak in uniformity, so that the porosity P is used for replacing R d The method comprises the steps of carrying out a first treatment on the surface of the In addition, the situation that the liquid is permeated on the lower surface through capillary action is considered in the original process, and the direction of permeation of emulsified asphalt is opposite to that of emulsified asphalt sprayed on a cement stabilized macadam base layer, but the corresponding influence factors are considered to be applicable to emulsified asphalt, so that the corresponding influence factors in the formula can be reserved, and meanwhile P is put on molecules.
Preferably, in the step 1, the formula of the liquid permeation rate representing the balance of the viscous force, the capillary action and the hydrostatic force under the action of neglecting the osmotic inertia force is as follows according to poiseuille lawWhere v=permeation rate, dh=permeation depth change value, dt=permeation time change value, R d Crack width, η = kinetic viscosity, h = penetration depth; osmotic pressure difference-> In which sigma = surface tension, R d Crack width, θ=contact angle, ρ=density, g=gravitational acceleration; then substituting DeltaP into the permeation rate to obtain a classical liquid permeation kinetics Lucas-Washburn equationWherein r = particle size, t = permeation time; taking the capillary action and the liquid gravity equal in magnitude (Δp=0), the liquid is in equilibrium, i.e. the maximum depth reached by the penetration: />
Preferably, the method for measuring the penetration depth of the emulsified asphalt by adopting a press breaking method comprises the following specific steps:
(1) Spraying emulsified asphalt on the surface of the maintained water-stabilized macadam base layer, standing for 3d, and covering the upper surface of the water-stabilized macadam test piece with a piece of paper;
(2) Placing the water-stable test piece on a press machine, and pressing the test piece at a speed of 2mm/min to ensure that cracks appear on the surface of the test piece in a loose state, but the whole scattering is avoided;
(3) Dividing the test piece into four parts longitudinally, and manually pressing the test piece to form broken aggregate originally;
(4) Three blocks are taken for each part, 12 blocks are taken in total, the numerical values of the 12 blocks are subjected to averaging treatment, and the final average value is taken as the final representative penetration depth.
Preferably, in the step 4, the water-stable test piece is slowly put into the barrel and ensures that water can only flow out through the water outlet at the top, then the water-stable test piece is kept still, bubbles continuously rise during the standing process, and the mass is correspondingly reduced, wherein the water replaces the air in the open pore of the test piece, then the water is slowly added until the bubbles are not generated, the mass of the electronic scale is not changed after the water is added, and the mass at the moment is recordedIs M 2 。
Advantageous effects
Compared with the prior art, the application has the following advantages:
1. the cement stabilized macadam base is large in preparation workload and long in time consumption, so that the time required for testing the penetration depth of emulsified asphalt is long.
2. When the compactness of the cement stabilized macadam base is higher, most of emulsified asphalt cannot be infiltrated sufficiently at the moment, so that the permeability evaluation of the emulsified asphalt material is not objective and accurate enough.
3. The original osmotic dynamics equation does not consider the related index of the emulsified asphalt, and the accuracy of the test result of the osmotic depth of the emulsified asphalt is poor.
Description of the drawings:
FIG. 1 is a schematic diagram of the permeation mechanism of the present application;
FIG. 2 is a schematic diagram of a room temperature drying film formation according to the present application;
FIG. 3 is a schematic diagram of the emulsified asphalt drying process of the present application;
FIG. 4 is a schematic representation of the immersion method of the present application;
FIG. 5 is a schematic diagram of the press failure method of the present application.
Detailed Description
The following describes the technical scheme of the application in detail:
example 1
A method for estimating the penetration depth of emulsified asphalt penetrating layer oil based on the modification of a penetration theory comprises the following steps:
step 1: according to poiseuille's law, the liquid permeation rate formula, which represents the balance of viscous force with capillary action and hydrostatic force, under the action of ignoring osmotic inertial force, isWhere v=permeation rate, dh=permeation depth change value, dt=permeation time change value, R d Crack width, η = kinetic viscosity, h = penetration depth; osmotic pressure differenceIn which sigma = surface tension, R d Crack width, θ=contact angle, ρ=density, g=gravitational acceleration; then substituting DeltaP into the permeation rate to obtain a classical liquid permeation kinetics Lucas-Washburn equationWherein r = particle size, t = permeation time; taking the capillary action and the liquid gravity equal in magnitude (Δp=0), the liquid is in equilibrium, i.e. the maximum depth reached by the penetration: />Compared with the oil-in-water emulsified asphalt, the oil-in-water emulsified asphalt needs to be used on a cement stabilized macadam base layer, and the permeation effect of the oil-in-water emulsified asphalt is related to the particle size, demulsification time and porosity of the cement stabilized macadam base layer, so that the particle size index r of the emulsified asphalt and the maximum stacking rate forming time T of particles need to be added into a liquid permeation dynamics equation; the surface tension and the contact angle in the formula have stronger relativity, and the parameter of the surface tension is not considered any more for the purpose of simplifying the formula; in addition, the emulsified asphalt is sprayed on the upper surface of the cement stabilized macadam base layer, and the width R of the index crack in the osmotic dynamics equation d The cement stabilized macadam is more suitable in terms of pore size, but the cement stabilized macadam base layer is more random in pore distribution and weak in uniformity, so that the porosity P is used for replacing R d The method comprises the steps of carrying out a first treatment on the surface of the In addition, the situation that liquid is permeated on the lower surface through capillary action is analyzed in the original process, the direction of permeation of emulsified asphalt is opposite to the direction of permeation of emulsified asphalt sprayed on a cement stabilized macadam base layer, but corresponding influence factors are suitable for emulsified asphalt, so that the corresponding influence factors in the formula can be reserved, meanwhile P is put on molecules, and finally, the estimated equation of the permeation depth of oil of the emulsified asphalt is as follows: />
Wherein: h-penetration depth (mm);
θ -contact angle, °;
rho-density, kg/m 3 ；
g-gravity acceleration, g/m 2 ；
T-maximum rate of particle formation time, h;
porosity of the P-water stabilized macadam test piece,%;
r-particle size, μm;
eta-dynamic viscosity, MPa.s
a. b, c, d, e, f-parameters to be fitted.
Step 2: as shown in figure 1, the average particle size of the emulsified asphalt particles influences the penetration effect of the emulsified asphalt on the cement stabilized macadam base to a certain extent. Then, the particle size index D of the emulsified asphalt is measured by a laser particle sizer 50 And taking the particle size index r as a particle size index r in a pre-estimation equation.
Step 3: the maximum accumulation rate of emulsified asphalt particles means that the water of the emulsified asphalt is continuously evaporated, so that the asphalt particles are in aggregation contact, the maximum accumulation state of the particles is reached during critical demulsification, at the moment, the emulsified asphalt and aggregate have the strongest adhesion performance, so that the emulsified asphalt does not infiltrate down at the moment, namely reaches the maximum penetration depth, the longer the emulsified asphalt reaches the state, the longer the demulsification time is, the longer the emulsified asphalt has a penetration process, and further has a larger penetration depth, the emulsified asphalt is subjected to a normal-temperature drying film forming method (a sample shown in a picture of a third part in fig. 2 is taken, and is put into a curing box for a drying test, the temperature is 20 ℃, the humidity is 15%, and the wind speed is 0.4 m/s), a change curve of the water in the drying film forming process is obtained through a timing weighing method, and the change curve is divided into three stages according to the drying film forming theory and the water change condition of the emulsified asphalt: the method comprises a particle filling stage, a demulsification stage and an asphalt film forming stage, wherein the intersection point of a fitting curve of the particle filling stage and a fitting line of the asphalt film forming stage is the time T of the maximum stacking rate of particles, and the time T is added into an estimated equation, and the testing method is shown in figure 2. In theory, according to the comparison of the emulsified asphalt dried film before and after reaching the maximum accumulation rate, asphalt particles are continuously coalesced, namely the evaporation rate before and after is greatly changed, the change value of the evaporation rate at the time point corresponding to the maximum accumulation rate of the particles is the maximum, and the change value corresponds to the evaporation curve, namely the curvature radius at the moment is the minimum. However, the exact function of the drying curve is unknown, so that the time for the maximum particle packing rate is calculated by the intersection of the first-stage fitted curve and the third-stage fitted line, and the specific operation is shown in fig. 3, and is added to the estimated equation.
Step 4: and measuring the open porosity of the water-stable test piece by adopting a water immersion method. The specific method comprises the steps of firstly weighing the original weight of a water stable test piece and recording as M 1 Then the bucket (with a water outlet at the top) in fig. 4 is taken and put on the electronic scale, and water is continuously added into the bucket until the mass is no longer increased, and the electronic scale value is zeroed. Then, slowly putting the water-stable test piece into the barrel, ensuring that water can only flow out through the water outlet at the top, then starting to stand, continuously upwards bubbling during which, the mass can be correspondingly reduced, wherein the water replaces the air in the open pore of the test piece, then continuously and slowly adding water until no bubble is generated, and after adding water, the mass of the electronic scale is not changed, recording that the mass at the moment is M2, and then calculating the open pore of the test piece according to a formula 2:
wherein: p (P) o -open porosity of the water stable test piece,%;
M 1 -original mass of a water stable test piece, g;
M 2 -the mass g of the water stabilization test piece after the buoyancy is subtracted;
V s solid volume of water stable test piece, cm 3 ；
ρ w Density of water, kg/m 3
Wherein M is 1 -M 2 The mass of water discharged from the solid part of the water stabilization test piece is divided by the density of the water to obtain the volume of the solid part, and the water stabilization test piece is expressed as V s Will be neglectedThe abrasion loss of the slightly water stable test piece is calculated according to the diameter D=15 cm and the height H=15 cm, and the volume is 2649.4cm 3 。
Step 5: the optical contact angle meter is adopted to measure the contact angle theta of the emulsified asphalt penetrating layer oil to be tested.
Step 6: the measured strike through oil density ρ was measured with a density bottle.
Step 7: and (3) carrying out viscosity test on the experimental sample by using a Brookfield viscometer to obtain the dynamic viscosity of the emulsified asphalt.
Step 8: the penetration depth of the emulsified asphalt is measured by adopting a press damage method, and the specific steps are as follows:
(1) Spraying emulsified asphalt on the surface of the maintained water-stabilized macadam base layer, standing for 3d, and covering the upper surface of the water-stabilized macadam test piece with a piece of paper, wherein the operation is to ensure that the test piece is stressed uniformly on one hand, realize that the test piece is loose integrally, and prevent the press from sticking with the emulsified asphalt which is not dried thoroughly on the other hand.
(2) And (3) placing the water-stable test piece on a press machine, pressing the test piece at a speed of 2mm/min, and enabling cracks to appear on the surface of the test piece to be in a loose state, wherein the whole scattering is avoided.
(3) Dividing the test piece into four parts longitudinally, and manually breaking off the aggregate according to the original constitution of the test piece, wherein the original lines are as much as possible, otherwise, the actual value of the penetration depth is reduced.
(4) Three blocks are taken from each part, 12 blocks are taken in total, the emulsified asphalt depth in the broken aggregate is measured by a ruler, the numerical values of the 12 blocks are subjected to averaging treatment, the final average value is taken as the final representative penetration depth, and a schematic diagram can be seen in fig. 5.
Step 9: preparing various emulsified asphalts according to Table 1, measuring the required values according to steps 2 to 8, and substituting the values into the equationAnd (3) performing corresponding fitting and determining parameters to be fitted.
Table 1 emulsified asphalt preparation conditions
Penetration depths for each group are shown in table 2:
table 2 penetration depth of emulsified asphalt of each control group
And then, carrying out corresponding fitting on the tested corresponding data to determine the undetermined parameter values, wherein the specific results are shown in a table 3, and the correlation indexes are shown in a table 4.
TABLE 3 parameters after fitting the permeation equation
Table 4 fit equation correlation parameters
From the fitting result, the correlation coefficient R 2 Reaching 0.98, there is a higher correlation, so the resulting fitting equation is shown in equation 3:
step 10: and (3) obtaining corresponding numerical values according to the steps 2-8, and substituting the numerical values into a formula 3 to obtain the maximum penetration depth predicted value of the penetrating oil.
Example 2
A method for estimating the penetration depth of emulsified asphalt through-layer oil based on the modification of penetration theory selects three common emulsified asphalt on the market, each control group is subjected to five groups of parallel tests and is sprayed on cement stabilized macadam of a suspension compact structure for curing 1d and 7d and a skeleton compact structure for curing 7d respectively, the required numerical value in a formula is measured, and the calculation result and the test result are averaged to obtain the average value of the five groups, and the method specifically comprises the following steps:
step 1: adopting an optical contact angle meter to measure the contact angle theta of the emulsified asphalt penetrating layer oil to be tested;
step 2: testing the particle size index D of the test sample by using a laser particle sizer 50 ；
Step 3: carrying out viscosity test on the experimental sample by using a Brookfield viscometer, and calculating the dynamic viscosity of the emulsified asphalt;
step 4: measuring the measured oil density of the emulsified asphalt through layer by using a density bottle;
step 5: testing the porosity of the cement stabilized macadam base layer by adopting a method of changing the quality of the cement stabilized macadam before and after soaking;
step 6: testing the maximum stacking rate forming time of the particles of the emulsified asphalt by adopting a normal-temperature drying film forming method;
step 7: substituting all measured data into the formulaThe predicted maximum penetration depth of the oil is obtained.
The test results are shown in Table 5:
TABLE 5 calculation and test values of the corresponding indices for emulsified asphalt
The test results show that the error values of the three test groups are basically within 15%, and the main reason for error is that the test results of the emulsified asphalt have larger error. But can still approximately estimate and judge the permeability of the emulsified asphalt, and has guiding significance for an emulsified asphalt permeability evaluation system.
Claims (5)
1. A method for estimating the penetration depth of emulsified asphalt penetrating layer oil is characterized by comprising the following steps:
step 1, an estimated equation of the penetration depth of emulsified asphalt penetrating oil is as follows:equation 1
Wherein: h-penetration depth (mm);
θ -contact angle, °;
rho-density, kg/m 3 ；
g-gravity acceleration, g/m 2 ；
T-maximum rate of particle formation time, h;
porosity of the P-water stabilized macadam test piece,%;
r-particle size, μm;
eta-dynamic viscosity, MPa.s
a. b, c, d, e, f-parameters to be fitted;
step 2: measuring particle size index D of emulsified asphalt by laser particle sizer 50 Taking the particle size index r as a particle size index r in a pre-estimation equation;
step 3: the change curve of moisture in the drying film forming process is obtained by a normal-temperature drying film forming method through a timing weighing method, and the change curve is divided into three stages according to the emulsified asphalt drying film forming theory and the moisture change condition: the method comprises a particle filling stage, a demulsification stage and an asphalt film forming stage, wherein the intersection point of a fitting curve of the particle filling stage and a fitting line of the asphalt film forming stage is the time T of the maximum stacking rate of particles, and the time T is added into an estimated equation;
step 4: measuring the open porosity of the water-stable test piece by adopting a water immersion method; the specific method comprises the steps of firstly weighing the original weight of a water stable test piece and recording as M 1 Then, a bucket with a water outlet at the top is taken and put on the electronic scale, water is continuously added into the bucket until the mass is no longer increased, and the numerical value of the electronic scale is zeroed at the moment; then slowly putting the water stable test piece into the barrel, ensuring that water can only flow out through the water outlet at the top, then starting to stand, then continuously and slowly adding water until no bubbles are generated, and recording that the mass of the electronic scale is M after the water is added 2 Then the opening of the test piece is carried out according to the formula 2The pore is calculated:
wherein: p (P) o -open porosity of the water stable test piece,%;
M 1 -original mass of a water stable test piece, g;
M 2 -the mass g of the water stabilization test piece after the buoyancy is subtracted;
V s solid volume of water stable test piece, cm 3 ；
ρ w Density of water, kg/m 3
Wherein M is 1 -M 2 The mass of water discharged from the solid part of the water stabilization test piece is divided by the density of the water to obtain the volume of the solid part, and the water stabilization test piece is expressed as V s The abrasion loss of the water stable test piece is ignored, the calculation is carried out according to the diameter D=15 cm and the height H=15 cm, and the volume is 2649.4cm 3 ；
Step 5: adopting an optical contact angle meter to measure the contact angle theta of the emulsified asphalt penetrating layer oil to be tested;
step 6: measuring the measured oil density rho of the strike through layer by using a density bottle;
step 7: carrying out viscosity test on the experimental sample by using a Brookfield viscometer to obtain dynamic viscosity of the emulsified asphalt;
step 8: measuring the penetration depth of the emulsified asphalt by adopting a press damage method;
step 9: selecting a plurality of emulsified asphalt, measuring the required numerical value according to the steps 2-8, and substituting the numerical value into an equationCorresponding fitting is carried out, and parameters to be fitted are determined;
step 10: and (3) obtaining corresponding values according to the steps 2-8 from the emulsified asphalt with the required estimated penetration depth, and substituting the values into an estimation equation to obtain the maximum penetration depth estimated value of the penetrating oil.
2. The method for estimating the penetration depth of emulsified asphalt through-layer oil according to claim 1, wherein the method comprises the steps of: the penetrating oil emulsified asphalt is used on a cement stabilized macadam base layer, and the particle size index r of the emulsified asphalt and the maximum stacking rate forming time T of particles are added into a liquid permeation dynamics equation; the surface tension and the contact angle in the formula have stronger relativity, and the parameter of the surface tension is not considered any more for the purpose of simplifying the formula; in addition, the emulsified asphalt is sprayed on the upper surface of the cement stabilized macadam base layer, and the width R of the index crack in the osmotic dynamics equation d The cement stabilized macadam is more suitable in terms of pore size, but the cement stabilized macadam base layer is more random in pore distribution and weak in uniformity, so that the porosity P is used for replacing R d The method comprises the steps of carrying out a first treatment on the surface of the In addition, the situation that the liquid is permeated on the lower surface through capillary action is considered in the original process, and the direction of permeation of emulsified asphalt is opposite to that of emulsified asphalt sprayed on a cement stabilized macadam base layer, but the corresponding influence factors are considered to be applicable to emulsified asphalt, so that the corresponding influence factors in the formula can be reserved, and meanwhile P is put on molecules.
3. The method for estimating the penetration depth of emulsified asphalt through-layer oil according to claim 1, wherein the method comprises the steps of: in the step 1, according to poiseuille's law, under the action of ignoring osmotic inertia force, the liquid permeation rate formula showing the balance of viscous force, capillary action and hydrostatic force is as followsWhere v=permeation rate, dh=permeation depth change value, dt=permeation time change value, R d Crack width, η = kinetic viscosity, h = penetration depth; osmotic pressure differenceIn which sigma = surface tension, R d Crack width, θ=contact angle, ρ=density, g=gravitational acceleration; the ap is then substituted into the permeation rate,obtaining classical liquid permeation kinetics Lucas-Washburn equationWherein r = particle size, t = permeation time; taking the capillary action and the liquid gravity equal in magnitude (Δp=0), the liquid is in equilibrium, i.e. the maximum depth reached by the penetration: />
4. The method for estimating the penetration depth of emulsified asphalt through-layer oil after modification based on the penetration theory according to claim 1, wherein the method comprises the following steps: the method for measuring the penetration depth of the emulsified asphalt by adopting the press damage method comprises the following specific steps:
(1) Spraying emulsified asphalt on the surface of the maintained water-stabilized macadam base layer, standing for 3d, and covering the upper surface of the water-stabilized macadam test piece with a piece of paper;
(2) Placing the water-stable test piece on a press machine, and pressing the test piece at a speed of 2mm/min to ensure that cracks appear on the surface of the test piece in a loose state, but the whole scattering is avoided;
(3) Dividing the test piece into four parts longitudinally, and manually pressing the test piece to form broken aggregate originally;
(4) Three blocks are taken for each part, 12 blocks are taken in total, the numerical values of the 12 blocks are subjected to averaging treatment, and the final average value is taken as the final representative penetration depth.
5. The method for estimating the penetration depth of emulsified asphalt through-layer oil after modification based on the penetration theory according to claim 1, wherein the method comprises the following steps: in the step 4, the water-stable test piece is slowly put into the barrel and ensures that water can only flow out through the water outlet at the top, then the water is kept still, bubbles continuously overflow during the standing period, the mass is correspondingly reduced, the water replaces the air in the hole of the test piece, then the water is slowly added until the bubbles are not generated, the mass of the electronic scale is not changed after the water is added, and the mass at the moment is recorded as M 2 。
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