CN116535150A - Chloride salt type anti-icing cover pavement and snow-melting and deicing effectiveness prediction method thereof - Google Patents
Chloride salt type anti-icing cover pavement and snow-melting and deicing effectiveness prediction method thereof Download PDFInfo
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- CN116535150A CN116535150A CN202310517201.8A CN202310517201A CN116535150A CN 116535150 A CN116535150 A CN 116535150A CN 202310517201 A CN202310517201 A CN 202310517201A CN 116535150 A CN116535150 A CN 116535150A
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- 238000002844 melting Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 24
- 150000003841 chloride salts Chemical class 0.000 title claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 61
- 230000008018 melting Effects 0.000 claims abstract description 39
- 239000002923 metal particle Substances 0.000 claims abstract description 39
- 238000005260 corrosion Methods 0.000 claims abstract description 26
- 230000007797 corrosion Effects 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 25
- 239000004568 cement Substances 0.000 claims abstract description 11
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 7
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 7
- 235000011116 calcium hydroxide Nutrition 0.000 claims abstract description 7
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 7
- 239000012615 aggregate Substances 0.000 claims abstract description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 13
- 239000000460 chlorine Substances 0.000 claims description 13
- 229910052801 chlorine Inorganic materials 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 13
- 239000010426 asphalt Substances 0.000 claims description 11
- 238000010276 construction Methods 0.000 claims description 10
- 238000007710 freezing Methods 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 6
- 235000019738 Limestone Nutrition 0.000 claims description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 6
- 230000008014 freezing Effects 0.000 claims description 6
- 239000006028 limestone Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000010257 thawing Methods 0.000 claims description 6
- 150000001804 chlorine Chemical class 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000007480 spreading Effects 0.000 claims description 4
- 238000003892 spreading Methods 0.000 claims description 4
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 claims description 3
- 238000009736 wetting Methods 0.000 claims description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052612 amphibole Inorganic materials 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 claims description 2
- -1 diabase Inorganic materials 0.000 claims description 2
- 239000010459 dolomite Substances 0.000 claims description 2
- 229910000514 dolomite Inorganic materials 0.000 claims description 2
- 238000011156 evaluation Methods 0.000 claims description 2
- 239000010438 granite Substances 0.000 claims description 2
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000011044 quartzite Substances 0.000 claims description 2
- 239000008096 xylene Substances 0.000 claims description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims 1
- 239000001110 calcium chloride Substances 0.000 claims 1
- 235000011148 calcium chloride Nutrition 0.000 claims 1
- 229910001628 calcium chloride Inorganic materials 0.000 claims 1
- 125000001309 chloro group Chemical class Cl* 0.000 abstract 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 5
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 5
- 239000010962 carbon steel Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003204 osmotic effect Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000003146 anticoagulant agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a chloride salt type anti-icing mat surface paving and snow melting and deicing effectiveness prediction method. The chlorine salt type anti-icing cover surface consists of aggregate, cement or slaked lime, cementing material and anti-icing agent. According to the invention, the anti-icing agent is actively added into the cover surface material in advance, so that the paved cover surface has the functions of melting snow and ice while prolonging the service life of the pavement. According to the corrosion rate of the metal particles in the service time, the consumed anti-icing agent dosage is calculated, and the content of the residual anti-icing agent is further obtained, so that the residual effective time of the anti-icing mat face can be quantitatively estimated, and the snow melting and ice melting effectiveness of the paved anti-icing mat face is effectively predicted.
Description
Technical Field
The invention belongs to the technical field of road engineering, and particularly relates to a chloride salt type anti-freezing mat surface paving and snow melting and ice melting effectiveness prediction method.
Background
It is counted that more than 70% of roads in winter in China are affected by ice and snow weather. The snow ice of the winter road is prevented, and the traffic capacity and the safety of the road in the ice and snow weather are improved, so that the method becomes the primary work of the winter road maintenance department. At present, aiming at the phenomenon of snow ice on the road surface, the traditional manual cleaning, mechanical cleaning, snow melting agent spreading and the like are all passive snow melting and deicing methods, which are time-consuming, labor-consuming and low in efficiency, and the active snow melting and ice melting cover surface technology becomes a new development state in recent years.
Compared with the traditional anti-icing asphalt mixture, the anti-icing cover material greatly reduces the dosage of the anti-icing agent and saves the cost. Through actively adding an anti-icing agent into the cover surface material in advance, under the action of osmotic pressure and continuous friction and rolling of a running vehicle, the anti-icing agent can be gradually separated out and forms an isolation layer on the road surface to enable the freezing point of the road surface water to be lowered, so that the road surface has the functions of melting snow and ice. Meanwhile, the thin finish coat can be used for not only new road surfaces, but also old road surfaces, and belongs to a general construction and maintenance technology. And during the later maintenance, the cleaning is convenient, and the maintenance and repair are simple.
The key of the ice-coagulation resistance cover technique is the added anti-coagulation agent. The specific type of the anti-icing agent and the diffusion and precipitation condition of the anti-icing agent on the road surface directly influence the effect and effectiveness of snow melting and deicing. The traditional chloride salt type anti-icing agent mainly comprising sodium chloride has the advantages of low-cost and easily available raw materials and obvious snow melting and ice melting effects. At present, in the use of a plurality of anti-icing agent products at home and abroad, the chloride salt type anti-icing agent is still a main stream product, and accounts for about 90% of the market share.
However, precipitation of the anti-icing agent with the snow melting and deicing effects in the anti-icing cover surface is affected by multiple factors, and the anti-icing agent is continuously precipitated after long-time vehicle rolling and rain washing. The effect of snow melting and ice melting is not known after the overlay is in service for a long time. In addition, the use of anti-icing agents, especially slow-release anti-icing agents, in recent years makes the precipitation rate of internal salients of the anti-icing agents more difficult to obtain. The problem of the black box directly leads to the difficulty in measuring and predicting the effectiveness of ice melting and snow melting of the ice-condensation resisting cover surface at present, which becomes a technical problem of widely popularizing the elbow-pulling anti-ice-condensation technology in the road field.
Disclosure of Invention
In order to solve the technical problems, the invention provides a chloride salt type anti-icing mat surface paving and snow melting and deicing effectiveness prediction method thereof. According to the invention, the anti-icing agent is actively added into the cover surface material in advance, so that the paved cover surface has the functions of melting snow and ice while prolonging the service life of the pavement. Aiming at the technical problem that the effectiveness of road snow melting and ice melting is difficult to predict, the invention can effectively predict the effectiveness of the paved anti-freezing cover surface snow melting and ice melting.
The chloride salt type anti-icing cover surface consists of aggregate, cement or slaked lime, cementing material and anti-icing agent; the mass of cement or slaked lime is not more than 5% of the mass of aggregate, the mass of cementing material is 5-15% of the mass of aggregate, and the mass of anti-icing agent is 0.1-5% of the mass of aggregate; the aggregate consists of, by mass, 30-65 parts of aggregate with the particle size of 5-10mm, 20-50 parts of aggregate with the particle size of 3-5mm and 15-55 parts of aggregate with the particle size of less than or equal to 3 mm.
The aggregate is one or more of basalt, limestone, granite, quartzite, orthosite, amphibole, diabase, dolomite and gneiss; wherein 20-80wt% of the aggregate with the particle size less than or equal to 3mm is metal particles meeting the particle size requirement.
The cementing material is one or more of emulsified asphalt, modified emulsified asphalt and liquid asphalt.
The anti-icing agent is one or more of chlorine-containing organic salt and chlorine-containing inorganic salt, but does not comprise CaCl 2 。
The paving construction process of the chlorine salt type anti-icing cover surface comprises the following steps: the aggregate and the anti-icing agent are fully and uniformly mixed in stirring equipment, then water is added for wetting, cement or slaked lime and cementing material are added for uniform mixing, then the spreading construction of the cover surface is carried out, and the traffic can be opened after the materials are dried.
The chloride salt type anti-icing cover snow melting and ice melting effectiveness prediction method comprises the following steps:
(1) Selecting two road sections with the same terrain conditions, the same weather conditions and the same traffic conditions to carry out overlay paving, wherein the two overlay road sections are respectively marked as an anti-icing road section R 1 Road section and comparative road section R 0 Road segment R 1 Road section uses anti-icing agent R 0 The road sections do not use anti-icing agents, and the rest materials and the construction process are the same;
(2) The paving thickness of the cover surfaces of the two road sections is h, and after the paving is finished, the cover surfaces are respectively arranged at R 1 Road segment and R 0 Selecting areas with the area S at the initial paving position of the road section, then selecting the areas with the area S at intervals of not less than 50m along the paving direction, and selecting the total number i not less than 3;
(3) R is R 1 Road segment and R 0 Spraying trichloroethylene, toluene or xylene on the surface of the area with the area S selected by the road section to dissolve away cementing materialThe aggregate is completely presented, metal particle distribution is obtained by adopting metal detection imaging, and the metal particle area is calculated; r is R 1 The area of the metal particles in the area S obtained by the road section is denoted as m 1i ，R 0 The area of the metal particles in the area S obtained by the road section is denoted as m 0i R is then 1 Weighted average mass of metal particles in unit area of road sectionR 0 The weighted average mass of the metal particles in the unit area of the road section is
ρ is the metal particle density;
(4) After the test of the step (3), the glue coating and material forming are carried out, so that the state of the mat surface paving is restored;
(5) After the road section is communicated for time t or after n times of rain, snow, freezing and thawing cycles, extracting aggregate under the same conditions and in the same method in the selected area of S in the two road sections, testing and calculating R 1 Mass f of metal particles in each area S of the road section 1i And a weighted average mass per unit areaR is then 1 General corrosion Rate for an area with a road segment area STesting and calculating R 0 Mass f of metal particles in each area S of the road section 0i And weighted average mass per unit area->R is then 0 General corrosion rate of the region with road section area S>In (1) the->An adjustment coefficient larger than 1 is used for correcting according to the difference between the indoor test and the corrosion rate of the metal particles in the outdoor actual environment;
(6) From step (5), it was calculated that the corrosion rate to the area cover having an area S was fv due to the use of the chlorine-containing anti-icing agent 1 -fv 0 The method comprises the steps of carrying out a first treatment on the surface of the The concentration of chloride ions required to be consumed by the regional anti-icing overlay road section with the area S can be reversely deduced according to the corrosion rate, and the mass k of the chlorine-containing anti-icing agent consumed by the regional overlay with the area S can be calculated by combining the rain and snow amount of the road section during the overlay service period; the total anti-icing agent consumption of the cover surface of the anti-icing road section is divided by the total area of the road section and then multiplied by S, so that the mass z of the anti-icing agent added into the regional road section with the area S can be obtained;
(7) According to the formulaThereby, the predictive evaluation of the effectiveness of the chlorine-containing anti-icing agent cover surface, namely the traffic time +.>Or go through->After the cycle of freezing and thawing of the secondary rain and snow, the anti-freezing cover surface no longer has the effect of thawing and deicing.
By means of the technical scheme, the invention has the following beneficial effects:
(1) Synergistic effect of multiple snow-melting ice-melting mechanisms
Through osmotic pressure and capillary action, the anti-icing agent is gradually separated out from the cover surface to the road surface with lower salt concentration and is dissolved in rain and snow, so that the liquid phase vapor pressure of water is reduced, but the solid state vapor pressure of ice is unchanged. In order to achieve the solid-liquid vapor pressure balance of the ice-water mixture, the ice and snow are melted, and therefore the effect of melting the ice and snow is achieved. In addition, the anti-icing agent has exothermic property when dissolved in ice and snow, such as the solution heat of anhydrous magnesium chloride reaching 6.05X10 4 J/mol, thereby strengthening the effect of melting snow and ice. In addition, the cover materialThe salt solution formed by the anti-icing agent added in the cover surface when meeting water can corrode metal particles in the cover surface, and the electrochemical reaction generated by the corrosion phenomenon also has the technical characteristic of heat release. The anti-icing agent reduces the technical characteristics of the system freezing point, and the dual exothermic effects of dissolution and electrochemical reaction of the anti-icing agent enable multiple ice melting and deicing mechanisms to be mutually cooperated, so that the ice melting and deicing effect of the anti-icing cover surface realized by the technology is realized to the maximum.
(2) Accurate quantitative prediction for realizing snow melting and ice melting effects
Migration and diffusion of the anti-icing agent in the pavement material can be influenced by multiple factors, and the actual snow melting and ice melting effect of the anti-icing pavement is difficult to quantitatively predict due to the fact that the vehicle load and the rain and snow conditions of the area are different during service. According to the invention, the consumed anti-icing agent dosage is calculated according to the corrosion rate of the metal particles in the service time by adding the metal particles into the substituted partial aggregate skillfully, so that the content of the residual anti-icing agent is obtained, and the residual effective time of the anti-icing cover surface can be estimated quantitatively. The metal particles of the present invention function as follows: replacing aggregate supporting load; corroding a target object, and quantitatively calculating effective time limit; "sacrificial self" avoids corrosion to the pavement and structures along the line; the corrosion releases heat to further melt snow and ice. Furthermore, caCl 2 As an anti-icing agent, the anti-icing agent is unfavorable for repeated regeneration of pavement, and the invention eliminates the traditional CaCl 2 As an anti-icing agent, is unfavorable for road surface regeneration.
The ice-resistant cover surface and the effectiveness prediction method thereof comprehensively consider the interaction of actual traffic load and regional climate, and have reliability and authenticity compared with the conventional indoor ice-resistant leaching method and the like.
Drawings
FIG. 1 is a graph of carbon steel corrosion rate versus chloride ion concentration.
Detailed Description
The invention is further described below with reference to examples:
example 1
The chlorine salt type anti-icing cover surface consists of the following materials in parts by mass: 35 parts of 5-10mm limestone, 27 parts of 3-5mm limestone and 38 parts of aggregate less than or equal to 3 mm. Limestone accounts for 50% of the aggregate with the particle size of less than or equal to 3mm, and carbon steel particles account for 50%. 1.5 parts of cement, 7.5 parts of modified emulsified asphalt and 1.5 parts of magnesium chloride anti-icing agent.
The anti-icing cover surface paving construction process comprises the following steps: the limestone aggregate, the carbon steel particles and the anti-icing agent are fully and uniformly mixed in stirring equipment, then water is added for wetting, cement and modified emulsified asphalt are added and uniformly mixed, spreading construction of the finish surface is carried out by using special paving equipment, and traffic can be opened after the cement and the modified emulsified asphalt are dried.
And selecting two road sections with similar traffic flow conditions to perform ice-resistant overlay paving in a summer hot and winter cold semi-dry area with a climate zone of 2-3-3. The two overlay road sections are respectively marked as R 1 And R is 0 The road section, the materials used in the two road sections and the construction process are as described above, and the difference is R 1 Road section materials using magnesium chloride as anti-icing agent, i.e. R 1 The road section is an anti-icing road section; and R is 0 Without anti-icing agents in road sections, i.e. R 0 The road section serves as a comparison road section.
The two road sections are respectively paved with the mat coat with the length of 600m and respectively arranged at R 1 Road segment and R 0 The road section cover is paved with areas with 60cm by 60cm at positions of 0m, 200m, 400m and 600 m.
At R 1 Road segment and R 0 Spraying trichloroethylene solution on the surface of a region with the area of 4 selected sections of 60cm by 60cm, dissolving, separating and extracting asphalt cement, and enabling aggregates on the surface of the region with the area of 4 sections of 60cm by 60cm to be displayed, at the moment, acquiring the metal particle distribution in the aggregates with the size of 0-3mm by means of a metal detection imaging technology, and estimating the metal particle area.
R using anti-icing agent 1 In the overlay section, the areas of metal particles in the areas with the areas of 4 parts being 60cm and 60cm are 39.1cm respectively 2 、45.7cm 2 、40.4cm 2 And 42.3cm 2 . Respectively carrying out weighted average treatment on the areas of the metal particles on the surfaces of the 4 areas to calculate an anti-icing overlay road section R 1 Mass m of metal particles per unit area 1 0.09131g. Similarly, no ice-setting inhibitor is pavedR of the comparison road segment 0 Mass m of metal particles per unit area 0 0.09247g. After the distribution and the area of the metal particles on the surfaces of the two sections are tested, glue coating and material forming are needed to be carried out on the surfaces so as to restore the pavement paving initial state.
After the road sections are communicated for 1 year, cutting out the selected areas with the areas of 60cm and 60cm of the two road sections, extracting all metal particles in the road sections with the thickness of 1cm in the areas of 60cm and 60cm of 4 road sections, and calculating the corrosion rate of the metal particles in the areas of 60cm and 60 cm. Mass average value f of unit area metal particles in each 60 cm-60 cm area of ice-resistant road section after removal of product 1 0.07229g, the total corrosion rate fv in 60 cm-60 cm area of the ice-resistant overlay section 1 Is thatThe service time is 8760 hours for 1 year, the area of metal particles in 60cm area is 4187mm 2 Correction factor->Taking 1.25, thereby calculating the overall corrosion rate fv of the anti-icing road section overlay in the 60 cm-by-60 cm area 1 2.334g/m 2 And/h. F is calculated by the same method 0 0.08793g, the overall corrosion rate fv of the road segment cover is compared 0 0.557g/m 2 /h。
From this, it was calculated that the corrosion rate of the overcoat metal particles on the 60cm by 60cm area due to the use of the chlorine-containing anti-icing agent was fv 1 -fv 0 1.777g/m 2 And/h. And (5) reversely deducing the concentration of chloride ions required to be consumed by the ice-resistant cover road section in the 60 cm-by-60 cm area according to the corrosion rate. And obtaining the corresponding relation between the corrosion rate and the chloride ion concentration of the carbon steel granular material by adopting a rotary hanging piece method, and finding the chloride ion concentration corresponding to the corrosion state according to the corrosion condition of the carbon steel in the actual road environment.
And combining the rain and snow amount of the road section during the service period of the overlay, and calculating the mass of the chlorine-containing anti-icing agent consumed by metal corrosion of the overlay by 0.536 parts. The total anti-icing agent dosage of the anti-icing overlay road section is 1.5 parts. According to the formula, the effectiveness of the chlorine-containing anti-icing agent cover surface can be predicted and evaluated, namely, after the vehicle is started for 2.8 years, the anti-icing cover surface does not have the snow melting and ice melting effects.
Claims (6)
1. The chlorine salt type anti-icing cover surface is characterized by comprising aggregate, cement or slaked lime, cementing material and anti-icing agent; the mass of cement or slaked lime is not more than 5% of the mass of aggregate, the mass of cementing material is 5-15% of the mass of aggregate, and the mass of anti-icing agent is 0.1-5% of the mass of aggregate; the aggregate consists of, by mass, 30-65 parts of aggregate with the particle size of 5-10mm, 20-50 parts of aggregate with the particle size of 3-5mm and 15-55 parts of aggregate with the particle size of less than or equal to 3 mm.
2. The chloride salt type anti-icing cover according to claim 1, wherein the aggregate is selected from one or more of basalt, limestone, granite, quartzite, orthosite, amphibole, diabase, dolomite, and gneiss; wherein 20-80wt% of the aggregate with the particle size less than or equal to 3mm is metal particles meeting the particle size requirement.
3. The chlorine salt type anti-icing mat according to claim 1, wherein the cementing material is one or more of emulsified asphalt, modified emulsified asphalt and liquid asphalt.
4. The chlorine salt type anti-icing cover according to claim 1, wherein the anti-icing agent is one or more of chlorine-containing organic salt and chlorine-containing inorganic salt, but not CaCl2.
5. The chloride salt type anti-icing mat coat according to claim 1, wherein the paving construction process of the chloride salt type anti-icing mat coat is as follows: the aggregate and the anti-icing agent are fully and uniformly mixed in stirring equipment, then water is added for wetting, cement or slaked lime and cementing material are added for uniform mixing, then the spreading construction of the cover surface is carried out, and the traffic can be opened after the materials are dried.
6. A chloride salt type anti-icing cover snow melting and ice melting effectiveness prediction method is characterized by comprising the following specific steps:
(1) Selecting two road sections with the same terrain conditions, the same weather conditions and the same traffic conditions to carry out overlay paving, wherein the two overlay road sections are respectively marked as an anti-icing road section R 1 Road section and comparative road section R 0 Road segment R 1 Road section uses anti-icing agent R 0 The road sections do not use anti-icing agents, and the rest materials and the construction process are the same;
(2) The paving thickness of the cover surfaces of the two road sections is h, and after the paving is finished, the cover surfaces are respectively arranged at R 1 Road segment and R 0 Selecting areas with the area S at the initial paving position of the road section, then selecting the areas with the area S at intervals of not less than 50m along the paving direction, and selecting the total number i not less than 3;
(3) R is R 1 Road segment and R 0 Spraying trichloroethylene, toluene or xylene on the surface of the area with the area S selected by the road section to dissolve away the cementing material so as to enable the aggregate to be completely presented, acquiring metal particle distribution by adopting metal detection imaging, and calculating the area of the metal particles; r is R 1 The area of the metal particles in the area S obtained by the road section is denoted as m 1i ，R 0 The area of the metal particles in the area S obtained by the road section is denoted as m 0i R is then 1 Weighted average mass of metal particles in unit area of road sectionR 0 The weighted average mass of the metal particles in the unit area of the road section is
ρ is the metal particle density;
(4) After the test of the step (3), the glue coating and material forming are carried out, so that the state of the mat surface paving is restored;
(5) After the road section is communicated for time t or after n times of rain, snow, freezing and thawing cycles, extracting aggregate under the same conditions and in the same method in the selected area with the area being S, testing and countingCalculating R 1 Mass f of metal particles in each area S of the road section 1i And a weighted average mass per unit areaR is then 1 General corrosion Rate for an area with a road segment area STesting and calculating R 0 Mass f of metal particles in each area S of the road section 0i And weighted average mass per unit area->R is then 0 General corrosion rate of the region with road section area S>In (1) the->An adjustment coefficient larger than 1 is used for correcting according to the difference between the indoor test and the corrosion rate of the metal particles in the outdoor actual environment;
(6) From step (5), it was calculated that the corrosion rate to the area cover having an area S was fv due to the use of the chlorine-containing anti-icing agent 1 -fv 0 The method comprises the steps of carrying out a first treatment on the surface of the The concentration of chloride ions required to be consumed by the regional anti-icing overlay road section with the area S can be reversely deduced according to the corrosion rate, and the mass k of the chlorine-containing anti-icing agent consumed by the regional overlay with the area S can be calculated by combining the rain and snow amount of the road section during the overlay service period; the total anti-icing agent consumption of the cover surface of the anti-icing road section is divided by the total area of the road section and then multiplied by S, so that the mass z of the anti-icing agent added into the regional road section with the area S can be obtained;
(7) According to the formulaThereby the effectiveness prediction and evaluation of the chlorine-containing anti-icing agent cover surface can be carried out, namely the vehicle is passed throughTimeOr go through->After the cycle of freezing and thawing of the secondary rain and snow, the anti-freezing cover surface no longer has the effect of thawing and deicing.
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| CN104807980A (en) * | 2015-05-23 | 2015-07-29 | 林光琴 | Evaluation method for snow melting performance of pavement of highway |
| CN113960296A (en) * | 2021-10-21 | 2022-01-21 | 江苏东交智控科技集团股份有限公司 | Testing device and testing method for anti-freezing effect of asphalt pavement |
| CN114018969A (en) * | 2021-11-05 | 2022-02-08 | 西华大学 | Method for quantitatively evaluating anti-freezing performance of salt-storage asphalt concrete pavement |
| CN115684253A (en) * | 2022-10-27 | 2023-02-03 | 安徽建筑大学 | Material composition proportion design method for self-heating bonding layer of paved asphalt blanket |
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| CN104807980A (en) * | 2015-05-23 | 2015-07-29 | 林光琴 | Evaluation method for snow melting performance of pavement of highway |
| CN113960296A (en) * | 2021-10-21 | 2022-01-21 | 江苏东交智控科技集团股份有限公司 | Testing device and testing method for anti-freezing effect of asphalt pavement |
| CN114018969A (en) * | 2021-11-05 | 2022-02-08 | 西华大学 | Method for quantitatively evaluating anti-freezing performance of salt-storage asphalt concrete pavement |
| CN115684253A (en) * | 2022-10-27 | 2023-02-03 | 安徽建筑大学 | Material composition proportion design method for self-heating bonding layer of paved asphalt blanket |
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