CN112745685A - Light-colored cementing material for frozen earth pavement and preparation method thereof - Google Patents
Light-colored cementing material for frozen earth pavement and preparation method thereof Download PDFInfo
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- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
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- C08K5/132—Phenols containing keto groups, e.g. benzophenones
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- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
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- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
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- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention provides a light-colored cementing material for frozen earth pavement. The cementing material comprises the following raw materials in parts by weight: 10-50 parts of petroleum resin, 4-30 parts of SBS, 20-70 parts of lubricating oil refined extract oil, 0.1-5.0 parts of ultraviolet absorbent, 1-15 parts of zinc oxide and 1-10 parts of titanium oxide. The light-colored cementing material for the frozen earth pavement is a white semitransparent substance, and a mixture prepared from the material is light white, has ultraviolet shielding and luminous properties, and has good light-reflecting and heat-insulating effects. Can replace asphalt pavement, reduce the disturbance of heat to the frozen soil roadbed, and effectively avoid the occurrence of frozen soil thawing sinking.
Description
Technical Field
The invention belongs to the technical field of road engineering materials, and particularly relates to a light-colored cementing material for a frozen soil pavement and a preparation method thereof.
Background
The frozen soil is a special rock-soil body with the temperature of 0 ℃ or below and containing ice, and is special soil with the mechanical property closely related to the temperature. In permafrost regions such as Tibet and the like, the construction of roadbed engineering inevitably changes the heat balance state of the original frozen soil layer on the earth surface, so that the compression deformation of a seasonal thawing layer, the compression deformation of a high-temperature frozen soil layer, the thawing and sinking deformation of permafrost and the like are caused, and the problems of roadbed and pavement series engineering diseases such as the thawing and sinking of a permafrost roadbed, uneven sinking and the like are caused. Especially under the condition that global climate is warmed, the energy radiated to the earth surface by the sun and the heat energy absorbed by the road surface are main reasons influencing the change of the temperature field of the frozen soil layer. The more the road surface absorbs the solar heat energy, the larger the heat effect on the frozen soil roadbed, and the more the solar energy reflected by the road surface, the smaller the heat effect on the frozen soil roadbed.
The asphalt pavement has the advantages of high driving comfort, early open traffic, easy maintenance and the like, is widely applied to medium and high-grade highways, but has darker color and more than 90 percent of sunlight radiation absorption rate, thereby causing the temperature rise of the asphalt pavement. The road surface structure form of the constructed road in the Qinghai-Tibet plateau area is mainly an asphalt road surface, and the heat absorption property of the asphalt road surface is extremely strong. Under the background of strong radiation in plateau areas, a large amount of heat is absorbed by the road surface and is transmitted to the roadbed, so that the temperature of the roadbed rises, frozen soil is disturbed, the frozen soil is thawed and the asphalt pavement diseases are frequent. In order to reduce the interference of heat absorption of asphalt pavements on frozen soil subgrades, technical measures such as a heat bar, a ventilation pipe, a ventilation plate, an EPS heat insulation plate and the like are mainly adopted at present. The technologies have the problems of long construction period, high construction cost, limited effect and the like.
CN201811460648.1 discloses a heat-shielding coating and a preparation method thereof. The heat shielding coating comprises the following raw material components: the coating mainly comprises a film forming substance, a reflection functional material, a color-mixing functional pigment, a heat-insulation functional material, an ultraviolet-resistant functional material, a diluent, a defoaming agent, a leveling agent, a curing agent, a low-temperature toughening agent and anti-skid particles. The asphalt pavement surface is coated with heat insulation by mainly adopting an epoxy resin coating technology, the anti-skid particles are waste rubber particles, carborundum and ceramic particles, the heat insulation functional material is hollow glass beads and the like, the pavement structure is shallow due to the thin coating, and the surface of the hollow glass beads is smooth, so that the anti-skid property of the whole pavement is inferior to that of a black asphalt pavement, and the driving safety is influenced. In addition, defoaming, leveling and the like of the coating material are required, and the construction process is complicated.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a light-colored cementing material for frozen earth pavement to improve the anti-sliding performance of the pavement; meanwhile, the reflected illumination function of the upper surface layer of the road body is more powerful, the strong absorption effect of solar radiation is greatly reduced, and the disturbance of heat to the frozen soil roadbed is reduced, so that the occurrence of frozen soil thawing is effectively avoided.
The invention provides a technical scheme that: the light-colored cementing material for the frozen soil pavement comprises the following raw materials in parts by weight: 10-50 parts of petroleum resin, 4-30 parts of SBS, 20-70 parts of lubricating oil refined extract oil, 0.1-5.0 parts of ultraviolet absorbent, 1-15 parts of zinc oxide and 1-10 parts of titanium oxide. Preferably: 20-40 parts of petroleum resin, 10-20 parts of SBS (styrene butadiene styrene), 30-60 parts of lubricating oil refined extract oil, 0.2-2.0 parts of ultraviolet absorber, 2-10 parts of zinc oxide and 1-5 parts of titanium oxide.
The petroleum resin is a petroleum resin with the temperature of above C5, and the softening point is 70-150 ℃.
The molecular weight of SBS is 10-30 ten thousand, and the product is white.
The distillation range of the refined extract oil of the lubricating oil is 360-500 ℃.
The ultraviolet absorbent is 2-hydroxy-4-n-octoxy benzophenone or benzophenone (C)13H10O), one or more of tri (1, 2, 2, 6, 6-pentamethylpiperidinyl) phosphite and hexamethylphosphoric triamide.
The zinc oxide is a white powdery pigment and has the functions of color mixing and light emitting. The titanium oxide is a white powdery pigment and has a reverse color function and an ultraviolet ray shielding function.
The invention also provides a preparation process of the light color cementing material for the frozen soil pavement, which comprises the following steps:
(1) heating, shearing and mixing petroleum resin, SBS and lubricant refined extract oil;
(2) then adding an ultraviolet absorbent, zinc oxide and titanium oxide powder, and stirring for 0.5-2 hours;
(3) cooling to obtain the final product.
The mixture ratio of the raw materials comprises the following components in parts by weight: 10-50 parts of petroleum resin, 4-30 parts of SBS, 20-70 parts of lubricating oil refined extract oil, 0.1-5.0 parts of ultraviolet absorbent, 1-15 parts of zinc oxide and 1-10 parts of titanium oxide. Preferably: 20-40 parts of petroleum resin, 10-20 parts of SBS (styrene butadiene styrene), 30-60 parts of lubricating oil refined extract oil, 0.2-2.0 parts of ultraviolet absorber, 2-10 parts of zinc oxide and 1-5 parts of titanium oxide.
The mixing in step (1) is carried out in a reaction kettle. The heating temperature is at least 100 ℃, generally 110-250 ℃, and preferably 120-220 ℃. The shear mixing is carried out in a mixing emulsification device with high shear force, and the shear rotation speed is as follows: 4000 to 8000 rpm, and the shearing and mixing time is 0.5 to 24 hours.
The stirring speed in the step (2) is 1000 to 2000 revolutions per minute.
The invention further provides an application of the light-colored cementing material for the frozen soil pavement in preparing a mixture.
The method for preparing the mixture by applying the light-colored cementing material for the frozen soil pavement comprises the following steps: heating the clear-color cementing material for the frozen soil pavement to 140-160 ℃, and uniformly mixing the clear-color cementing material with aggregate according to the standard requirement of a road asphalt mixture to obtain a mixture of the clear-color cementing material for the frozen soil pavement.
The light-colored cementing material for the frozen soil pavement is a white semitransparent object, the mixture prepared by the material is light white, has ultraviolet shielding and luminous properties, has good light-reflecting and heat-insulating effects, can reduce the disturbance of heat to a frozen soil roadbed, and effectively avoids the occurrence of frozen soil thaw collapse.
Specifically, compared with the prior art, the invention has the following advantages:
1. the technique of the invention adopts a special process formula to produce the bright-colored cementing material for the pavement, the service performances such as the structure, the performance, the construction depth and the like of the pavement are the same as those of a black asphalt pavement, and no adverse effect is caused on the mechanical property and the pavement performance of the mixture; compared with the method of paving the pavement by adopting a leveling polyamino resin film-forming method, the anti-skid property and the roughness of the pavement are greatly improved, and the driving safety is ensured.
2. The prepared colorless cementing material for the pavement has better wear resistance than the leveling resin coating in the prior art.
3. The clear-color cementing material for frozen earth pavement disclosed by the invention adopts components with super-strong ultraviolet absorption capacity, hardly absorbs visible light, and has excellent ageing resistance and oxidation resistance.
4. The light-colored cementing material for the frozen soil pavement is a white semitransparent object, the mixture prepared by the material is light white, has ultraviolet shielding and luminous properties, has good light-reflecting and heat-insulating effects, can reduce the disturbance of heat to a frozen soil roadbed, and effectively avoids the occurrence of frozen soil thaw collapse.
5. The construction process is simple, the construction can be carried out according to the existing standard asphalt mixture mixing method, and the economic benefit and the social benefit are good.
Detailed Description
The present invention is described in detail below with reference to specific examples, but it should be understood that the examples are only for better illustration of the present invention, and the scope of the present invention is not limited by the specific examples.
According to the test method adopted by the invention, the penetration is determined according to the GB/T4509 method; the softening point is determined according to the method GB/T4507; the ductility is measured according to the method GB/T4508; heat shielding effect: and under the same illumination condition, testing the temperature 4cm below the surface of the sample by using a temperature sensor.
Comparative example 1
In this embodiment, a clear color cement is prepared, and the mixture ratio thereof is as follows:
20 parts of petroleum resin, wherein the softening point is 110 ℃;
16 parts of SBS, the molecular weight is 15 ten thousand;
44 parts of lubricating oil refining extract oil, and the distillation range is 360-500 ℃.
The preparation process comprises the following steps:
adding the weighed petroleum resin, SBS and lubricant refined extract oil into a reaction kettle, heating to 135 ℃, stirring for 2 hours at the rotating speed of 4000 revolutions per minute of a stirrer, and cooling to room temperature to obtain the target product. The performance of the obtained product is shown in table 1, and the high temperature of the sample at the depth of 4cm can be seen from table 1, which shows that the sample has large heat absorption capacity and poor heat shielding effect.
Example 1
The present embodiment prepares a light color cementing material for frozen earth pavement, which comprises the following raw materials in parts by weight:
20 parts of petroleum resin, wherein the softening point is 110 ℃;
16 parts of SBS, the molecular weight is 15 ten thousand;
44 parts of lubricating oil refined extract oil, wherein the distillation range is 360-500 ℃;
1.0 part of 2-hydroxy-4-n-octoxy benzophenone;
6 parts of zinc oxide;
3 parts of titanium oxide.
The production place of the thermoplastic elastomer SBS is Yueyang petrochemical plant, and the zinc oxide and the titanium oxide are commercial products.
The preparation process comprises the following steps:
(1) adding the petroleum resin, SBS and the refined extract oil of the lubricating oil in the proportion into a reaction kettle, heating to 135 ℃, enabling the rotating speed of a stirrer to be 4000 revolutions per minute, and shearing and mixing for 2 hours;
(2) then adding ultraviolet absorbent 2-hydroxy-4-n-octoxy benzophenone, zinc oxide and titanium oxide powder, and reacting for 2 hours at the rotating speed of a stirrer of 1500 revolutions per minute;
(3) cooling to room temperature to obtain the light color cementing material for the frozen soil pavement.
The properties of the product obtained are shown in Table 1, from which it can be seen that: the light color cementing material prepared by the embodiment has higher softening point and higher ductility, shows that the high-temperature performance and the low-temperature performance are better, the surface temperature of a sample is obviously reduced, and the heat shielding effect is good.
Example 2
The present embodiment prepares a light color cementing material for frozen earth pavement, which comprises the following raw materials in parts by weight:
30 parts of petroleum resin with a softening point of 140 ℃;
12 parts of SBS, with molecular weight of 25 ten thousand;
56 parts of lubricating oil refining extract oil with a distillation range of 360-500 ℃;
0.3 part of tris (1, 2, 2, 6, 6-pentamethylpiperidinyl) phosphite;
2 parts of zinc oxide;
5 parts of titanium oxide.
The preparation process comprises the following steps:
(1) adding the petroleum resin, SBS and the refined extract oil of the lubricating oil into a reaction kettle according to the proportion, heating to 175 ℃, enabling the rotating speed of a stirrer to be 6000 revolutions per minute, and shearing and mixing for 40 minutes;
(2) then adding ultraviolet absorbent tris (1, 2, 2, 6, 6-pentamethylpiperidinyl) phosphite, zinc oxide and titanium oxide powder, wherein the rotating speed of a stirrer is 1800 rpm, and reacting for 1.5 hours;
(3) cooling to room temperature to obtain the light color cementing material for the frozen soil pavement.
The properties of the product obtained are shown in Table 1, from which it can be seen that: the bright color cementing material has higher softening point and higher ductility, completely meets the technical index requirements of petroleum asphalt for heavy traffic roads, and proves that the bright color cementing material has good high-temperature and low-temperature properties. The surface temperature of the sample is obviously reduced, and the heat shielding effect is good.
Example 3
The present embodiment prepares a light color cementing material for frozen earth pavement, which comprises the following raw materials in parts by weight:
38 parts of petroleum resin with a softening point of 80 ℃;
10 parts of SBS, with molecular weight of 12 ten thousand;
30 parts of lubricating oil refined extract oil, wherein the distillation range is 360-500 ℃;
1.8 parts of hexamethylphosphoric triamide;
9 parts of zinc oxide;
and 2 parts of titanium oxide.
The preparation process comprises the following steps:
(1) adding the petroleum resin, SBS and the refined extract oil of the lubricating oil in the proportion into a reaction kettle, heating to 220 ℃, wherein the rotating speed of a stirrer is 4500 rpm, and shearing and mixing for 1 hour;
(2) adding ultraviolet absorbent hexamethyl phosphoric triamide, zinc oxide and titanium oxide powder, wherein the rotating speed of a stirrer is 2000 r/min, and reacting for 0.5 hour;
(3) cooling to room temperature to obtain the light color cementing material for the frozen soil pavement.
The properties of the product obtained are shown in Table 1, from which it can be seen that: the bright color cementing material has higher softening point and higher ductility, completely meets the technical index requirements of petroleum asphalt for heavy traffic roads, and proves that the bright color cementing material has good high-temperature and low-temperature properties. The surface temperature of the sample is obviously reduced, and the heat shielding effect is good.
Example 4
The present embodiment prepares a light color cementing material for frozen earth pavement, which comprises the following raw materials in parts by weight:
30 parts of petroleum resin, wherein the softening point is 120 ℃;
12 parts of SBS, the molecular weight is 20 ten thousand;
38 parts of lubricating oil refining extract oil, wherein the distillation range is 360-500 ℃;
1.8 parts of tris (1, 2, 2, 6, 6-pentamethylpiperidinyl) phosphite;
6 parts of zinc oxide;
3 parts of titanium oxide.
The preparation process comprises the following steps:
(1) adding the petroleum resin, SBS and the refined extract oil of lubricating oil in the proportion into a reaction kettle, heating to 175 ℃, enabling the rotating speed of a stirrer to be 5500 revolutions per minute, and shearing and mixing for 1 hour;
(2) then adding ultraviolet absorbent tris (1, 2, 2, 6, 6-pentamethylpiperidinyl) phosphite, zinc oxide and titanium oxide powder, wherein the rotating speed of a stirrer is 1500 revolutions per minute, and reacting for 2 hours;
(3) cooling to room temperature to obtain the light color cementing material for the frozen soil pavement.
The properties of the product obtained are shown in Table 1.
TABLE 1 clear Binder Properties
| Item | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 |
| Penetration (25 ℃, 100g, 5 s), 1/10mm | 96 | 78 | 64 | 73 | 105 |
| Ductility (25 ℃, 5 cm/min), cm | >100 | >100 | >100 | >100 | >100 |
| Ductility (15 ℃, 5 cm/min), cm | >100 | >100 | >100 | >100 | >100 |
| Softening point (ring and ball method), DEG C | 53.4 | 58.4 | 62.4 | 59.4 | 50.2 |
| Sample depth 4cm, deg.C | 36.6 | 37.2 | 35.8 | 34.5 | 56.6 |
As can be seen from table 1: the bright color cementing material has higher softening point and higher ductility, completely meets the technical index requirements of petroleum asphalt for heavy traffic roads, and proves that the bright color cementing material has good high-temperature and low-temperature properties. The surface temperature of the sample is obviously reduced, and the heat shielding effect is good.
Claims (10)
1. The light-colored cementing material for the frozen soil pavement is characterized by comprising the following raw materials in parts by weight: 10-50 parts of petroleum resin, 4-30 parts of SBS, 20-70 parts of lubricating oil refined extract oil, 0.1-5.0 parts of ultraviolet absorbent, 1-15 parts of zinc oxide and 1-10 parts of titanium oxide.
2. The clear cement of claim 1, wherein the clear cement comprises, in parts by weight: 20-40 parts of petroleum resin, 10-20 parts of SBS (styrene butadiene styrene), 30-60 parts of lubricating oil refined extract oil, 0.2-2.0 parts of ultraviolet absorber, 2-10 parts of zinc oxide and 1-5 parts of titanium oxide.
3. The clear cement according to claim 1 or 2, wherein the petroleum resin is a petroleum resin having a softening point of 70 to 150 ℃ and a carbon number of at least C5; the molecular weight of SBS is 10-30 ten thousand; the distillation range of the refined extract oil of the lubricating oil is 360-500 ℃.
4. The clear cement of claim 1 or 2, wherein the UV absorber is 2-hydroxy-4-n-octoxybenzophenone, benzophenone (C)13H10O), one or more of tri (1, 2, 2, 6, 6-pentamethylpiperidinyl) phosphite and hexamethylphosphoric triamide.
5. The preparation process of the light color cementing material for the frozen earth pavement is characterized by comprising the following preparation steps:
heating, shearing and mixing petroleum resin, SBS and lubricant refined extract oil;
then adding an ultraviolet absorbent, zinc oxide and titanium oxide powder, and stirring for 0.5-2 hours;
cooling to obtain the final product.
6. The process of claim 5, wherein the proportions of the raw materials, by weight, comprise: 10-50 parts of petroleum resin, 4-30 parts of SBS, 20-70 parts of lubricating oil refined extract oil, 0.1-5.0 parts of ultraviolet absorbent, 1-15 parts of zinc oxide and 1-10 parts of titanium oxide; preferably: 20-40 parts of petroleum resin, 10-20 parts of SBS (styrene butadiene styrene), 30-60 parts of lubricating oil refined extract oil, 0.2-2.0 parts of ultraviolet absorber, 2-10 parts of zinc oxide and 1-5 parts of titanium oxide.
7. The process of claim 5, wherein the heating in step (1) is carried out at a temperature of at least 100 ℃, typically 110 to 250 ℃, preferably 120 to 220 ℃; the shear rotation speed of the shear mixing is as follows: 4000 to 8000 rpm, and the shearing and mixing time is 0.5 to 24 hours.
8. The process according to claim 5, wherein the stirring speed in the step (2) is 1000 to 2000 rpm.
9. Use of a clear binder for frozen earth pavements according to any one of claims 1 to 4 in the preparation of a mix.
10. The use according to claim 9, characterized in that the method for preparing the mixture by using the clear cement for frozen earth pavement of the invention comprises the following steps: heating the clear-color cementing material for the frozen soil pavement to 140-160 ℃, and uniformly mixing the clear-color cementing material with aggregate according to the standard requirement of a road asphalt mixture to obtain a mixture of the clear-color cementing material for the frozen soil pavement.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117534371A (en) * | 2023-12-29 | 2024-02-09 | 知行良知实业股份有限公司 | High-proportion regenerated rubber asphalt mixture and preparation method thereof |
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