CN107286683B - Cool pavement material, cool pavement mixture and preparation method thereof - Google Patents
Cool pavement material, cool pavement mixture and preparation method thereof Download PDFInfo
- Publication number
- CN107286683B CN107286683B CN201710439808.3A CN201710439808A CN107286683B CN 107286683 B CN107286683 B CN 107286683B CN 201710439808 A CN201710439808 A CN 201710439808A CN 107286683 B CN107286683 B CN 107286683B
- Authority
- CN
- China
- Prior art keywords
- cool
- cementing
- pavement
- component
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides a cool pavement material, a cool pavement mixture and a preparation method thereof, wherein an adsorption water-retention material, a cementing modification material and an anti-stripping component are uniformly mixed according to a certain proportion to obtain the pavement material, the preparation operation is simple, the adsorption water-retention material achieves the purposes of water retention and temperature control through a phase change process, on the basis, the cementing modification material further enhances the temperature control effect by reducing the adsorption of solar radiation, and the anti-stripping component ensures that the pavement is good in smoothness and is not easy to crack. The pavement mixture is prepared by uniformly mixing a pavement material with a certain proportion and mineral aggregates for paving the pavement, so that the pavement has the effects of water retention and temperature control. The cool pavement material, the cool pavement mixture and the preparation method thereof have the advantages of good water retention and temperature control effects, simple preparation method and low cost.
Description
Technical Field
The invention relates to a pavement building material, in particular to a cool pavement material, a cool pavement mixture and a preparation method thereof.
Background
The original soil surface in modern cities is gradually replaced by houses, large infrastructures and various watertight sites and roads. The urban road mostly adopts the form of asphalt pavement with high flatness, good comfort and low noise.
In addition, the urban population is dense, the heat of factories and vehicles is discharged, the domestic energy of residents is released, the comprehensive influence of urban building structures and the characteristics of underlying surfaces is the main reason for generating the urban heat island effect, and the urban area is increasingly developed, so that the population is dense, the waterproof building area is increased, the heat discharging machines are various, the probability of natural rainfall penetrating into the ground soil is relatively reduced, and the heat balance of the city is damaged, so that the heat of the road surface cannot be released.
The urban residents are eroded step by high-temperature weather, high-temperature pavements and high-temperature diseases, and the urban heat island strength is reported to reach 7 ℃ at most, the death rate of the high-temperature diseases is improved by 31.2 percent, and the traffic accident rate is increased by 27.7 percent. The urban temperature is increased, which directly causes the problem of pollutant aggregation caused by reduced air pressure, increases the probability of urban residents suffering from high-temperature diseases, and greatly reduces the road performance. The strength of the heat island in an extra-large city such as Beijing is remarkable and is increasingly serious. According to statistics, the Beijing city consumes more than 6000 tons of water resources for humidifying the road surface every year on average, which causes serious water resource waste for the northern city with serious shortage of water resources.
Asphalt is a black heat absorbing material, the solar absorptivity is very high (reaching 0.85-0.95), and domestic and foreign researches show that when the temperature reaches 35 ℃, the surface temperature of an asphalt road can reach 60-65 ℃, so that the serious urban heat island problem is caused. Meanwhile, high-temperature asphalt materials release a large amount of volatile matters, so that the living environment is rapidly deteriorated, and diseases such as road rutting and the like are caused.
Disclosure of Invention
The invention provides a cool pavement material, a cool and cool pavement mixture and a preparation method thereof, which overcome the problems or at least partially solve the problems, so as to solve the technical problems that an asphalt pavement is easy to generate a heat island effect and has poor anti-cracking performance in high-temperature weather.
According to one aspect of the invention, the cool pavement material comprises an adsorption water-retention material and a cementing modification material, wherein the adsorption water-retention material can achieve the purpose of water retention and temperature control through phase change, and the cementing modification material can reduce the adsorption of the pavement to solar radiation, so that the temperature control effect is further enhanced.
The adsorption water-retention material is a phase-change material, the phase-change material can increase the temperature sensitivity of various performances of asphalt, and the road surface temperature is reduced through phase change on the road surface by actively adsorbing water vapor in the air. On the basis, the cementing modified material further reduces the absorption of the pavement to solar radiation, so as to achieve better temperature control effect.
Preferably, the substance for adsorbing the water-retaining material is grown preferentially in the direction of the major axis along which the vertebral body is formed at the close-packed side. The capillary effect can be generated at normal temperature, based on the capillary principle, the capillary effect can actively adsorb water vapor in the air under the conventional natural environment or in the air, the phase change process that the water vapor is changed from a gas phase into a liquid phase and then the liquid phase is evaporated into the gas phase is realized, the effect of automatically retaining water to control the temperature is achieved, and meanwhile, the temperature of a road surface can be controlled by the heat change process of the phase change without additionally adopting other measures to control the temperature.
Preferably, the adsorption water retention material is one or more of calcium chloride, magnesium chloride, ferric chloride, aluminum chloride, calcium sulfonate, calcium oxalate and potassium oxalate.
More preferably, the adsorbent water-retaining material comprises calcium chloride, magnesium chloride, ferric chloride, aluminum chloride, calcium oxalate and potassium oxalate.
More preferably, the adsorbent water-retaining material comprises calcium chloride, ferric chloride, aluminum chloride, calcium oxalate and potassium oxalate.
More preferably, the adsorptive water-retaining material comprises calcium chloride, magnesium chloride and calcium oxalate.
Calcium chloride has extremely strong hygroscopicity, is extremely deliquescent when exposed to air, and generates interfacial energy equilibrium conversion. Ferric chloride is readily soluble in water and has strong water absorption, and can absorb moisture in the air to deliquesce. Magnesium chloride and aluminum chloride have very strong water absorption and absorb moisture in the air to deliquesce to form a saturated solution. Calcium oxalate and potassium oxalate also have water-absorbing properties and are easily deliquescent by absorbing moisture in the air. The substances can be respectively and independently used as the water absorbing and retaining material, and any combination of the substances can also be used as the water absorbing and retaining material.
Specifically, when two or more of calcium chloride, magnesium chloride, ferric chloride, aluminum chloride, calcium sulfonate, calcium oxalate and potassium oxalate are selected for combination, the proportion of each substance can be selected at will, no special requirement exists, the final content of the prepared adsorption water retention material can meet the requirement, and no matter what substance is selected or the proportion of each substance is adopted, a good road surface temperature control effect can be achieved.
Preferably, the cementitious modifying material in the cool pavement material comprises a matrix cementitious component, polymeric fibres and a thickening agent. The matrix cementing component adopts a substance with good thermal stability and weather resistance, the polymer fiber is used for absorbing and storing heat so as to slow down the influence of the change of environmental temperature on the change speed and amplitude of the pavement temperature, and the thickening agent is used for improving and increasing the viscosity of the matrix cementing component so as to maintain the stability of the pavement. The cementing modified material has good thermal stability and weather resistance, and further enhances the temperature control effect on the basis of the temperature control of the adsorption water-retention material.
Preferably, the matrix cementing component may be one or more of aliphatic resin, alicyclic resin, aromatic resin, aliphatic/aromatic copolymer resin and hydrogenated petroleum resin.
More preferably, the matrix-consolidating component includes an aliphatic resin, a cycloaliphatic resin, an aromatic resin, and an aliphatic/aromatic copolymer resin.
More preferably, the matrix-cementing component comprises an aliphatic resin, a cycloaliphatic resin, and an aromatic resin.
The aliphatic resin film has excellent physical properties, excellent cold crack resistance, yellowing resistance, bending resistance, light resistance, excellent drum-falling resistance and uniform appearance, so that the aliphatic resin film has excellent covering property. The alicyclic resin has good thermal stability, the thermal decomposition temperature is higher than 360 ℃, and the alicyclic resin has good weather resistance and ultraviolet radiation resistance, also has the function of an adhesive and has high crosslinking degree after curing. The aromatic resin has the characteristics of light color, high hardness, high gloss, good chemical resistance and the like. The hydrogenated petroleum resin has the characteristics of low acid value, good miscibility, water resistance, ethanol resistance, chemical resistance and the like, has chemical stability to acid and alkali, and has the characteristics of good viscosity regulation and good thermal stability.
Furthermore, when the matrix cementing component adopts two or more than two of aliphatic resin, alicyclic resin, aromatic resin, aliphatic/aromatic copolymer resin and hydrogenated petroleum resin, the component proportion has no special requirement, the proportion of each substance can be selected at will, and good pavement temperature control effect can be achieved.
The polymer fiber is also called a polymer compound or a polymer, and is a compound having a relatively high molecular weight, which is polymerized from a monomer. When the temperature rises, the polymer fiber can absorb heat from the surrounding environment and store the heat, so that the speed and the amplitude of the rise of the temperature of the road surface are reduced; when the ambient temperature drops, the polymer fibers release the heat absorbed by the polymer fibers, so that the dropping speed and the dropping amplitude of the pavement temperature are reduced.
The thickening agent is used as an additive for improving and increasing the viscosity of cementing materials, preventing the sagging phenomenon, keeping the stability of normal-temperature solid and high-temperature fluid substances and improving the physical properties of the materials.
Preferably, the mass percentage of the matrix cementing component in the cementing modification material is 65-80%, the mass percentage of the polymer fiber in the cementing modification material is 5-10%, and the mass percentage of the thickening agent in the cementing modification material is 10-30%.
More preferably, the mass percent of the matrix cementing component in the cementing modification material is 65-75%, the mass percent of the polymer fiber in the cementing modification material is 7-10%, and the mass percent of the thickening agent in the cementing modification material is 18-25%.
A large number of tests prove that when the cementing modification material is prepared according to the mass percentage, the absorption of solar radiation can be effectively reduced, and the temperature control effect is good.
The cementing modification material is non-toxic and pollution-free, common in raw materials, energy-saving and environment-friendly, low in price, environment-friendly, good in solar radiation weakening absorptivity, capable of obviously reducing the temperature reduction effect under the condition that other properties are not changed, capable of reducing the strength of a heat island and improving the ecological environment, and widely applicable to urban roads, streets, airports and other areas.
Preferably, an organic toner can also be added to the cementitious modifying material. It is understood that the kind of color of the organic toner and the amount of the added organic toner can be appropriately adjusted according to actual needs. When the required color is obvious, the addition amount of the organic toner can be properly increased; when a more distinct color change is not required, the amount of addition of the organic toner can be reduced appropriately. Proper organic toner is selected, so that the solar radiation absorption can be effectively reduced, and the temperature control effect is good.
Preferably, an anti-peeling component may also be added to the cool pavement material to prevent cracking of the cool pavement material. The anti-flaking component may be one or more of calcium lignosulfonate, sodium lignosulfonate and petroleum resin.
More preferably, the antistripping component includes calcium lignosulfonate and petroleum resin.
The calcium lignosulphonate is non-toxic and has good stability, dispersibility and cohesiveness. The sodium lignosulfonate has good stability and dispersibility, and can be adsorbed on the surfaces of various solid particles. The petroleum resin has the characteristics of good chemical stability, viscosity regulation and good thermal stability, and is low in price, non-toxic and environment-friendly.
The calcium lignosulfonate, the sodium lignosulfonate and the petroleum resin can be respectively used as anti-stripping components independently, and any combination of several substances can be used as the anti-stripping components. A large number of tests prove that when any number of substances are selected and combined, the proportion of each substance can be selected at will, as long as the final content of the prepared anti-stripping component meets the requirement, and no matter which substance or the proportion of each substance is selected, good adhesion performance can be achieved.
Preferably, in the cool and refreshing pavement material, the mass percent of the adsorption and water retention material is 20-40%, the mass percent of the cementing modification material is 40-55%, and the mass percent of the anti-stripping component is 5-40%.
More preferably, the mass percent of the adsorption water-retention material is 25-40%, the mass percent of the cementing modification material is 40-55%, and the mass percent of the anti-stripping component is 5-35%.
More preferably, the mass percent of the adsorption water-retention material is 30-40%, the mass percent of the cementing modification material is 40-55%, and the mass percent of the anti-stripping component is 5-30%.
More preferably, the mass percent of the adsorption water-retention material is 35-40%, the mass percent of the cementing modification material is 40-55%, and the mass percent of the anti-stripping component is 5-25%.
More preferably, the mass percent of the adsorption water-retention material is 35-40%, the mass percent of the cementing modification material is 45-55%, and the mass percent of the anti-stripping component is 5-20%.
Specifically, if the addition amount of the adsorption water retention material is less than 20%, the cooling temperature control effect cannot be achieved or is not obvious; if the addition amount of the adsorption water-retention material is higher than 40%, the cooling temperature control effect can not be obviously improved or the cooling temperature control effect is basically unchanged, so that the adsorption water-retention material is continuously added, the waste of raw materials is caused, and the cost is increased.
If the addition amount of the cementing modification material is less than 40 percent, the effect of cooling temperature control cannot be achieved or is not obvious; if the addition amount of the cementing modification material is higher than 55%, the cooling and temperature control effect can not be obviously improved or is basically unchanged, so that the cementing modification material is continuously added, the waste of raw materials is caused, and the cost is increased.
If the addition amount of the anti-stripping component is less than 5%, the adhesion effect cannot be achieved or is not obvious, and the road can crack; if the addition amount of the antistripping component is more than 40%, the adhesion is not significantly improved any more or the adhesion is not substantially changed, and therefore, the continuous addition of the antistripping component leads to waste of raw materials and increases costs.
A cool pavement material comprises an adsorption water-retention material for retaining and controlling the temperature by phase change, a cementing modification material for reducing the absorption of pavement solar radiation and an anti-stripping component for preventing pavement from cracking;
the adsorption water retention material is one or more of calcium chloride, magnesium chloride, ferric chloride, aluminum chloride, calcium sulfonate, calcium oxalate and potassium oxalate;
the matrix cementing component is one or more of aliphatic resin, alicyclic resin, aromatic resin, aliphatic/aromatic copolymer resin and hydrogenated petroleum resin;
the anti-stripping component is one or more of calcium lignosulfonate, sodium lignosulfonate and petroleum resin.
Preferably, the mass percent of the adsorption water-retention material is 20-40%, the mass percent of the cementing modification material is 40-55%, and the mass percent of the anti-stripping component is 5-40%.
More preferably, the adsorbent water-retaining material comprises calcium chloride, magnesium chloride, ferric chloride, aluminum chloride, calcium carbonate and potassium oxalate.
More preferably, the adsorbent water-retaining material comprises calcium chloride, ferric chloride, aluminum chloride, calcium oxalate and potassium oxalate.
More preferably, the adsorptive water-retaining material comprises calcium chloride, magnesium chloride and calcium oxalate.
More preferably, the matrix-consolidating component includes an aliphatic resin, a cycloaliphatic resin, an aromatic resin, and an aliphatic/aromatic copolymer resin.
More preferably, the matrix-cementing component comprises an aliphatic resin, a cycloaliphatic resin, and an aromatic resin.
More preferably, the antistripping component includes calcium lignosulfonate and petroleum resin.
The adsorption water retention material, the cementing modification material and the anti-stripping component with proper content are added, so that the cool pavement material with the optimal temperature control effect can be formed, the cool pavement material can automatically retain water and control temperature through the processes of phase change and reduction of solar radiation absorption, and meanwhile, the anti-stripping component enables the cool pavement material to have better stability, so that the cool pavement material does not influence the normal use function of a road and fully realizes the effect of cool temperature control.
It can be understood that the cool road surface material can only comprise the adsorption water-retention material and the cementation modification material, so as to achieve the purpose of water retention and temperature control of the road surface. The cool pavement material formed by adding the anti-stripping component has better effect, and can further enhance the stability of the cool pavement material and prevent pavement cracking on the basis of water retention and temperature control.
According to another aspect of the present invention, there is also provided a method for producing a cool road surface material, the method being used for producing the cool road surface material, and specifically comprising:
step S1, heating the adsorption water retention material, the cementing modification material and the anti-stripping component according to the proportion, and uniformly mixing to obtain a uniformly mixed mixture;
and step S2, putting the mixture into an oven for development to obtain the cool pavement material.
Specifically, the mass ratio of the water-retention adsorbing material, the cementitious modifying material and the anti-peeling component in step S1 is as follows: the mass percentage of the adsorption water-retention material is 20-40%, the mass percentage of the cementing modification material is 40-55%, and the mass percentage of the anti-stripping component is 5-40%.
Preferably, the mass percent of the adsorption water-retention material is 30-40%, the mass percent of the cementing modification material is 40-55%, and the mass percent of the anti-stripping component is 5-30%.
Preferably, the mass percent of the adsorption water-retention material is 35-40%, the mass percent of the cementing modification material is 45-55%, and the mass percent of the anti-stripping component is 5-20%.
Adding the adsorption water-retention material, the cementing modification material and the anti-stripping component with corresponding mass proportions into a mixing device, heating to a proper temperature and mixing. Preferably, the temperature of mixing is 110 ℃ to 160 ℃. At the mixing temperature of 110-160 ℃, the adsorption water-retention material, the cementing modification material and the anti-stripping component are in free flowing state, and the fluidity is good. Mixing at the temperature to ensure that the adsorption water retention material, the cementing modification material and the anti-stripping component can be fully and uniformly mixed. Further preferably, the temperature of mixing is 130 ℃ to 150 ℃.
Specifically, in step S1, the time for mixing the water-retention adsorbing material, the cementitious modifying material and the anti-flaking component is preferably 20min to 50 min. The adsorption water retention material, the cementing modification material and the anti-stripping component can be fully and uniformly mixed after 20min-50min of mixing. Further preferably, the mixing time is 25min to 45 min.
Specifically, in step S1, the stirring rate at which the water-retention adsorbent material, the cementitious modifying material and the antistripping component are mixed is preferably 2000r/min to 10000 r/min. Further preferably, the stirring rate is 4000r/min to 6000 r/min.
Preferably, before the adsorption water retention material, the cementitious modified material and the anti-peeling component are mixed, the cementitious modified material is prepared, and the preparation method of the cementitious modified material in the step S1 specifically comprises the following steps:
step S11, heating the components for forming the cementing modified material, and then mixing and uniformly mixing to obtain a matrix cementing mixture;
and step S12, putting the matrix cementing mixture into an oven for development to obtain the cementing modified material.
Specifically, each component of the cementing modification material is a matrix cementing component, a polymer fiber and a thickening agent. The mass percentage of the matrix cementing component in the cementing modified material is 65-80%, the mass percentage of the polymer fiber in the cementing modified material is 5-10%, and the mass percentage of the thickening agent in the cementing modified material is 10-30%.
More preferably, the mass percent of the matrix cementing component in the cementing modification material is 65-75%, the mass percent of the polymer fiber in the cementing modification material is 7-10%, and the mass percent of the thickening agent in the cementing modification material is 18-25%.
Specifically, the mixing temperature of the matrix cementitious component, the polymeric fibers and the thickener is preferably 120 ℃ to 170 ℃. More preferably, the mixing temperature is 130 ℃ to 160 ℃.
Specifically, the time for mixing the matrix cementitious component, the polymeric fiber and the thickener is preferably 20min to 40 min.
Specifically, in step S11, the stirring speed for mixing the matrix cementing component, the polymer fiber and the thickening agent is 2000r/min-10000 r/min. It may further preferably be 4000r/min to 6000 r/min.
A large number of tests prove that the matrix cementing component, the polymer fiber and the thickening agent can be fully and uniformly mixed at the mixing temperature and within the mixing time.
Further, in step S11, the composition of the cement modifier also includes an organic toner. After the matrix cementing component, the polymer fiber and the thickening agent are mixed and mixed uniformly, organic toner can be further added to adjust the color of the cementing modification material, so that the absorption of the cementing modification material to solar radiation is further reduced, and the temperature control effect is enhanced.
It is understood that the amount of the organic toner added and the kind of the color can be appropriately adjusted according to the specific requirements for the color. Specifically, the matrix cementing component, the polymer fiber and the thickening agent are mixed and mixed evenly, then the organic toner is added, and the mixture is mixed and mixed evenly within the same mixing speed and mixing time.
Specifically, the temperature of the development of the matrix cement mixture in the oven in the step S12 is preferably 130-160 ℃, and the development time is preferably 20-40 min.
Specifically, in step S2, the matrix cementitious mixture obtained by uniformly mixing the water-retention adsorbing material, the cementitious modifying material and the anti-peeling component is placed in an oven for development, and the development temperature is preferably 130 ℃ to 160 ℃. Further preferably, the development of the matrix cement mixture in the oven is carried out for a period of 30min to 60 min.
The preparation method of the cool pavement material organically combines the adsorption water retention component, the cementing modification material and the anti-stripping component, and has the advantages of simple process, convenient operation, no pollution in the preparation process and low cost.
According to another aspect of the present invention, there is also provided a cool pavement mix comprising a cool pavement material and mineral aggregate.
Specifically, the cool pavement material comprises an adsorption water retention material, a cementing modification material and an anti-stripping component. The adsorption water retention material is preferably one or more of calcium chloride, magnesium chloride, ferric chloride, aluminum chloride, calcium sulfonate, calcium oxalate and potassium oxalate; the cementing modification material comprises a matrix cementing component, high polymer fibers and a thickening agent, wherein the matrix cementing component is preferably one or more of aliphatic resin, alicyclic resin, aromatic resin, aliphatic/aromatic copolymer resin and hydrogenated petroleum resin; the anti-stripping component is preferably one or more of calcium lignosulfonate, sodium lignosulfonate and petroleum resin.
Further, the mass percentage of the adsorption water-retaining material in the cool pavement material is 20-40%, the mass percentage of the cementing modification material in the cool pavement material is 40-55%, and the mass percentage of the anti-stripping component in the cool pavement material is 5-40%.
Preferably, the mass percentage of the adsorption water retention material in the cool pavement material is 30-40%, the mass percentage of the cementing modification material in the cool pavement material is 40-55%, and the mass percentage of the anti-stripping component in the cool pavement material is 5-30%.
Preferably, the mass percentage of the adsorption water retention material in the cool pavement material is 35-40%, the mass percentage of the cementing modification material in the cool pavement material is 45-55%, and the mass percentage of the anti-stripping component in the cool pavement material is 5-20%.
Preferably, the mass percentage of the cool pavement material in the cool pavement mixture is 1-20%, and the mass percentage of the mineral aggregate in the cool pavement mixture is 80-99%.
More preferably, the mass percentage of the cool pavement material in the cool pavement mixture is 3% -10%, and the mass percentage of the mineral aggregate in the cool pavement mixture is 90% -97%.
In particular, the mineral aggregate is preferably an alkaline heat resistant aggregate. Further, the mineral aggregate is preferably basalt and/or shale.
In particular, the mineral aggregate is preferably aggregate with four particle size grades, namely 13.2mm-16.0mm, 4.75mm-9.5mm, 0.15mm-2.36mm and 0mm-0.075 mm.
Specifically, the mineral aggregate grading needs to meet the requirements of technical Specifications for road asphalt pavement construction (JTG E20-2011). The mass percentage of the mineral aggregate with each grain size grade in the mineral aggregate is as follows: 0-20% of particle size 13.2-16.0 mm, 15-50% of particle size 4.75-9.5 mm, 40-70% of particle size 0.15-2.36 mm and 10-15% of particle size 0-0.075 mm.
In the cool and refreshing road surface mixture, the adsorption and water retention material can effectively absorb moisture in the air, the moisture is subjected to phase change on the road surface to absorb heat, and the temperature of the road surface is controlled; the cementing modification material can reduce the absorption of solar radiation, so that the interface surface energy is increased, the color of the road surface is changed, and the road surface has the maximum cool temperature control performance, thereby achieving the double effects of improving the urban heat island effect and saving water resources, and simultaneously not influencing other performances of the asphalt. Meanwhile, the anti-stripping component ensures the stability of the cool pavement mixture and prevents pavement cracking.
Specifically, when preparing the cool road surface mixture, the following steps are specifically adopted: the prepared cool pavement material is added into mineral aggregate, heated and fully mixed to form a cool pavement mixture.
Specifically, the temperature at which the cool road surface material and the mineral aggregate are mixed is preferably 100 ℃ to 200 ℃. More preferably, the mixing temperature is 150 ℃ to 180 ℃.
Specifically, the time for mixing the cool pavement material and the mineral aggregate is preferably 60s to 150 s. More preferably, the mixing time is 90s to 120 s.
When preparing the cool pavement mixture, the cool pavement material is directly added into mineral heat-resistant aggregates with certain gradation as a road cementing material to form the cool pavement mixture. The preparation method is simple, the cost control is good, the composite means of material phase change temperature control and solar radiation absorption reduction is adopted, the water absorption, moisture preservation and temperature self-control functions of the pavement are realized, the absorption amount of solar radiation is reduced, the pavement surface temperature is reduced to the maximum degree, the urban heat island effect is further improved, and the cool pavement mixture has good pavement performance.
The beneficial effects of the invention are mainly as follows:
(1) the adsorption water-retention material achieves the purposes of water retention and temperature control through phase change, can effectively reduce the water resource investment required by cooling, and improves the urban heat island phenomenon;
(2) a cementing modified material is further added into the cool pavement material or the mixture to reduce the absorption of solar radiation and further enhance the temperature control effect; meanwhile, the cementing modified material can effectively absorb and store heat energy so as to reduce the adverse effect of environmental temperature change on the road surface;
(3) the anti-stripping component makes the pavement not easy to crack and has good stability;
(4) the components of the cool pavement material or the cool pavement mixture are nontoxic, cheap and easily available substances, and the cool pavement material or the cool pavement mixture has low cost and safe use.
Detailed Description
The following examples are given to further illustrate the embodiments of the present invention. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1
A cool pavement material comprises an adsorption water retention material, a cementing modification material and an anti-stripping component.
Wherein, the adsorption water retention material comprises calcium chloride, magnesium chloride, ferric chloride, aluminum chloride, calcium oxalate and potassium oxalate; the cementing modification material comprises aliphatic resin, alicyclic resin, aromatic resin, aliphatic/aromatic copolymer resin and hydrogenated petroleum resin; the antistripping component includes calcium lignosulfonate, sodium lignosulfonate, and petroleum resin.
The mass percent of the adsorption water-retention material is 25%, the mass percent of the cementing modification material is 55%, and the mass percent of the anti-stripping component is 20%.
In the case of 10000g of cool and refreshing pavement material, 2500g of water-retaining adsorbing material, 5500g of cementing and modifying material and 2000g of anti-stripping component are required.
The preparation method of the cool and refreshing pavement material comprises the following steps:
step S1, heating the adsorption water retention material, the cementing modification material and the anti-stripping component according to the proportion, and uniformly mixing to obtain a uniformly mixed mixture;
and step S2, putting the mixture into an oven for development to obtain the cool pavement material.
The mass percentages of all substances in the adsorption water-retention material are as follows: 10% of calcium chloride, 10% of magnesium chloride, 15% of ferric chloride, 25% of aluminum chloride, 20% of calcium oxalate and 20% of potassium oxalate. The mass percentage of each substance in the cementing modified material is as follows: 30% of aliphatic resin, 25% of alicyclic resin, 25% of aromatic resin and 20% of hydrogenated petroleum resin. The anti-stripping component comprises the following substances in percentage by mass: 35% of calcium lignosulphonate, 30% of sodium lignosulphonate and 35% of petroleum resin.
The mixing temperature of the adsorption water-retention material, the cementing modification material and the anti-stripping component is 110 ℃, and the mixing time is 60 min; the development temperature of the adsorption water-retention material, the cementing modification material and the anti-stripping component is 130 ℃, and the development time is 40 min. Stirring at high speed of 4000r/min by using a shear apparatus.
Example 2
A cool pavement material comprises an adsorption water retention material, a cementing modification material and an anti-stripping component.
The adsorption water-retention material comprises calcium chloride, calcium oxalate and potassium oxalate, the cementing modification material comprises aliphatic resin, alicyclic resin and aromatic resin, and the anti-stripping component comprises calcium lignosulphonate and petroleum resin.
The mass percent of the adsorption water-retention material is 30%, the mass percent of the cementing modification material is 65%, and the mass percent of the anti-stripping component is 10%.
Taking 10000g of cool pavement material as an example, 3000g of water-retaining material needs to be adsorbed, 6500g of cementing modification material needs to be cemented, and 1000g of anti-stripping component needs to be prepared.
The preparation method of the cool pavement material is the same as that in the embodiment.
Wherein the mass percentage of each substance in the adsorption water-retention material is as follows: 20% of calcium chloride, 30% of calcium oxalate and 50% of potassium oxalate. The mass percentage of each substance in the cementing modified material is as follows: 20% of aliphatic resin, 30% of alicyclic resin and 50% of aromatic resin. The anti-stripping component comprises the following substances in percentage by mass: 50% of calcium lignosulphonate and 50% of petroleum resin.
The mixing temperature of the adsorption water-retention material, the cementing modification material and the anti-stripping component is 160 ℃, and the mixing time is 5 min; the development temperature of the adsorption water-retention material, the cementing modification material and the anti-stripping component is 150 ℃, and the development time is 20 min; stirring at high speed of 6000r/min by using a shear apparatus.
Example 3
A cool pavement material comprises an adsorption water retention material, a cementing modification material and an anti-stripping component.
Wherein, the adsorption water-retention material comprises calcium chloride, magnesium chloride and calcium oxalate, the cementing modification material comprises aliphatic resin, aromatic resin and hydrogenated petroleum resin, and the anti-stripping component comprises sodium lignosulphonate and petroleum resin.
The mass percent of the adsorption water-retention material is 30%, the mass percent of the cementing modification material is 40%, and the mass percent of the anti-stripping component is 30%.
Taking 10000g of cool pavement material as an example, 3000g of water-retaining material needs to be adsorbed, 4000g of cementing modification material needs to be adhered, and 3000g of anti-stripping component needs to be prepared.
The preparation method of the cool pavement material is the same as that in the embodiment.
Wherein the mass percentage of each substance in the adsorption water-retention material is as follows: 30% of calcium chloride, 30% of magnesium chloride and 40% of calcium oxalate. The mass percentage of each substance in the cementing modified material is as follows: 30% of aliphatic resin, 30% of alicyclic resin and 40% of aromatic resin. The anti-stripping component comprises the following substances in percentage by mass: 40% of calcium lignosulphonate and 60% of petroleum resin.
The mixing temperature of the adsorption water-retention material, the cementing modification material and the anti-stripping component is 130 ℃, and the mixing time is 40 min; the development temperature of the adsorption water-retention material, the cementing modification material and the anti-stripping component is 140 ℃, and the development time is 30 min; stirring at a high speed of 2000r/min by using a shear apparatus.
Example 4
A cool pavement material comprises an adsorption water retention material, a cementing modification material and an anti-stripping component.
The adsorption water-retention material comprises calcium chloride, ferric chloride, aluminum chloride, calcium oxalate and potassium oxalate, the cementing modification material comprises aliphatic resin, aromatic resin, aliphatic/aromatic copolymer resin and hydrogenated petroleum resin, and the anti-stripping component comprises calcium lignosulfonate, sodium lignosulfonate and petroleum resin.
The mass percent of the adsorption water-retention material is 30%, the mass percent of the cementing modification material is 50%, and the mass percent of the anti-stripping component is 20%.
Taking 10000g of cool pavement material as an example, 3000g of water-retaining material needs to be adsorbed, 5000g of cementing modification material needs to be cemented, and 2000g of anti-stripping component needs to be prepared.
The preparation method of the cool pavement material is the same as that in the embodiment.
Wherein the mass percentage of each substance in the adsorption water-retention material is as follows: 70% of calcium chloride, 5% of ferric chloride, 5% of aluminum chloride, 10% of calcium oxalate and 10% of potassium oxalate. The mass percentage of each substance in the cementing modified material is as follows: 70% of aliphatic resin, 10% of alicyclic resin, 10% of aliphatic/aromatic copolymer resin and 10% of aromatic resin. The anti-stripping component comprises the following substances in percentage by mass: 70% of calcium lignosulphonate, 10% of sodium lignosulphonate and 20% of petroleum resin.
The mixing temperature of the adsorption water-retention material, the cementing modification material and the anti-stripping component is 150 ℃, and the mixing time is 20 min; the development temperature of the adsorption water-retention material, the cementing modification material and the anti-stripping component is 130 ℃, and the development time is 30 min; stirring at high speed of 10000r/min by using a shear apparatus.
Example 5
A cool pavement material comprises an adsorption water retention material, a cementing modification material and an anti-stripping component.
Wherein, the adsorption water-retention material comprises calcium oxalate, the cementing modification material comprises hydrogenated petroleum resin, and the anti-stripping component comprises calcium lignosulphonate.
The mass percent of the adsorption water-retention material is 35 percent, the mass percent of the cementing modification material is 35 percent, and the mass percent of the anti-stripping component is 30 percent.
Taking 10000g of cool and refreshing pavement material as an example, 3500g of water-retaining material needs to be adsorbed, 3500g of cementing modification material needs to be cemented, and 3000g of anti-stripping component needs to be prepared.
The preparation method of the cool pavement material is the same as that in the embodiment.
Wherein the mixing temperature of the adsorption water-retention material, the cementing modification material and the anti-stripping component is 140 ℃, and the mixing time is 30 min; the development temperature of the adsorption water-retention material, the cementing modification material and the anti-stripping component is 140 ℃, and the development time is 40 min; stirring at high speed of 4000r/min by using a shear apparatus.
Example 6
A cool pavement material comprises an adsorption water retention material, a cementing modification material and an anti-stripping component.
The adsorption water-retention material comprises calcium chloride, magnesium chloride, ferric chloride, calcium oxalate and potassium oxalate, the cementing modification material comprises aliphatic resin, aromatic resin, aliphatic/aromatic copolymer resin and hydrogenated petroleum resin, and the anti-stripping component comprises calcium lignosulfonate, sodium lignosulfonate and petroleum resin.
The mass percent of the adsorption water-retention material is 35%, the mass percent of the cementing modification material is 50%, and the mass percent of the anti-stripping component is 15%.
Taking 10000g of cool pavement material as an example, 3500g of water-retaining material needs to be adsorbed, 5000g of cementing modification material needs to be cemented, and 1500g of anti-stripping component needs to be prepared.
The preparation method of the cool pavement material is the same as that in the embodiment.
Wherein the mass percentage of each substance in the adsorption water-retention material is as follows: 5% of calcium chloride, 15% of magnesium chloride, 60% of ferric chloride, 5% of calcium oxalate and 15% of potassium oxalate. The mass percentage of each substance in the cementing modified material is as follows: 10% of aliphatic resin, 50% of alicyclic resin, 30% of aliphatic/aromatic copolymer resin and 10% of aromatic resin. The anti-stripping component comprises the following substances in percentage by mass: 5% of calcium lignosulphonate, 80% of sodium lignosulphonate and 15% of petroleum resin.
The mixing temperature of the adsorption water-retention material, the cementing modification material and the anti-stripping component is 135 ℃, and the mixing time is 50 min; the development temperature of the adsorption water-retention material, the cementing modification material and the anti-stripping component is 135 ℃, and the development time is 30 min; stirring at high speed of 5000r/min by using a shear apparatus.
Example 7
A cool pavement mixture comprises cool pavement materials and mineral aggregates, wherein the cool pavement materials and the mineral aggregates are as follows by mass percent: the mass percent of the mineral aggregate is 80 percent, and the mass percent of the cool and refreshing pavement material is 20 percent. Wherein the mineral aggregate is basalt, and the particle size of the mineral aggregate and the mass percentage of the mineral aggregate with each particle size are shown in table 1. For example, 10000g of cool pavement mixture is prepared, 8000g of mineral aggregate is required, and 2000g of cool pavement material is required. Adding the prepared cool pavement material into mineral aggregate, heating to 100 ℃, and mixing for 150s to obtain the cool pavement mixture.
TABLE 1 particle size of mineral aggregates and mass percentage of mineral aggregates of each particle size
| Particle size (mm) | 13.2 | 9.5 | 4.75 | 2.36 | 0.15 | 0.075 | Less than 0.075 |
| Mass percent (%) | 4 | 18 | 22 | 34 | 11 | 5 | 6 |
| Weight (g) | 320 | 1440 | 1760 | 2720 | 880 | 400 | 480 |
The cool pavement material comprises an adsorption water retention material, a cementing modification material and an anti-stripping component. The cool pavement material comprises the following components in percentage by mass: 40% of adsorption water retention material, 40% of cementing modification material and 20% of anti-stripping component.
For example, 2000g of cool pavement material is prepared, 800g of water-retaining material, 800g of cementing and modifying material and 400g of anti-stripping component are required to be adsorbed.
The water-absorbing and water-retaining material comprises calcium chloride, ferric chloride, aluminum chloride, calcium oxalate and potassium oxalate, and the mass percentages of the components in the water-absorbing and water-retaining material are as follows: 2% of calcium chloride, 30% of ferric chloride, 40% of aluminum chloride, 26% of calcium oxalate and 2% of potassium oxalate.
The cementing modification material comprises aliphatic resin, alicyclic resin, aliphatic/aromatic copolymer resin and aromatic resin, and the cementing modification material comprises the following components in percentage by mass: 4% of aliphatic resin, 30% of alicyclic resin, 40% of aliphatic/aromatic copolymer resin and 26% of aromatic resin.
The anti-stripping component comprises calcium lignosulfonate, sodium lignosulfonate and petroleum resin, and the anti-stripping component comprises the following components in percentage by mass: 90% of calcium lignosulphonate, 5% of sodium lignosulphonate and 5% of petroleum resin.
The preparation method of the cool road surface material was the same as that in example 1. Wherein the mixing temperature of the adsorption water-retention material, the cementing modification material and the anti-stripping component is 110 ℃, and the mixing time is 60 min; the development temperature of the adsorption water-retention material, the cementing modification material and the anti-stripping component is 130 ℃, and the development time is 40 min; stirring at high speed of 4000r/min by using a shear apparatus.
Example 8
A cool road surface mix which differs from example 7 in that: the mass percentage of the mineral aggregate in the cool road surface mixture is 99 percent, and the mass percentage of the cool road surface material in the cool road surface mixture is 1 percent.
The cool pavement material comprises an adsorption water retention material, a cementing modification material and an anti-stripping component. The cool pavement material comprises the following components in percentage by mass: 35% of adsorption water-retention material, 40% of cementing modification material and 25% of anti-stripping component.
The water-absorbing and water-retaining material comprises calcium chloride, calcium oxalate and potassium oxalate, and the mass percentage of each component in the water-absorbing and water-retaining material is as follows: 25% of calcium chloride, 45% of calcium oxalate and 30% of potassium oxalate.
The cementing modification material comprises alicyclic resin, aliphatic/aromatic copolymer resin and aromatic resin, and the cementing modification material comprises the following components in percentage by mass: 25% of alicyclic resin, 45% of aliphatic/aromatic copolymer resin and 30% of aromatic resin.
The anti-stripping component comprises calcium lignosulfonate and petroleum resin, and the mass percentage of each component in the anti-stripping component is as follows: 20% of calcium lignosulphonate and 80% of petroleum resin.
Example 9
A cool road surface mix which differs from example 7 in that: the mass percentage of the mineral aggregate in the cool road surface mixture is 90%, and the mass percentage of the cool road surface material in the cool road surface mixture is 10%.
The cool pavement material comprises an adsorption water retention material, a cementing modification material and an anti-stripping component. The cool pavement material comprises the following components in percentage by mass: 30% of adsorption water-retention material, 55% of cementing modification material and 15% of anti-stripping component.
The water-absorbing and water-retaining material comprises magnesium chloride, calcium oxalate and potassium oxalate, and the mass percentages of the components in the water-absorbing and water-retaining material are as follows: 55% of magnesium chloride, 2% of calcium oxalate and 43% of potassium oxalate.
The cementing modified material comprises aliphatic resin, aromatic resin and hydrogenated petroleum resin, and the cementing modified material comprises the following components in percentage by mass: 55% of aliphatic resin, 2% of aromatic resin and 43% of hydrogenated petroleum resin.
The anti-stripping component comprises calcium lignosulfonate and sodium lignosulfonate, and the mass percentages of the components in the anti-stripping component are as follows: 65% of calcium lignosulfonate and 35% of sodium lignosulfonate.
Example 10
A cool road surface mix which differs from example 7 in that: the mass percent of the mineral aggregate in the cool and refreshing road surface mixture is 97%, and the mass percent of the cool and refreshing road surface material in the cool and refreshing road surface mixture is 3%.
The cool pavement material comprises an adsorption water retention material, a cementing modification material and an anti-stripping component. The cool pavement material comprises the following components in percentage by mass: 45% of adsorption water retention material, 50% of cementing modification material and 5% of anti-stripping component.
The water-absorbing and water-retaining material comprises calcium chloride, ferric chloride, aluminum chloride, calcium oxalate and potassium oxalate, and the mass percentages of the components in the water-absorbing and water-retaining material are as follows: 40% of calcium chloride, 2% of ferric chloride, 2% of aluminum chloride, 30% of calcium oxalate and 26% of potassium oxalate.
The cementing modification material comprises aliphatic resin, alicyclic resin, aromatic resin, aliphatic/aromatic copolymer resin and hydrogenated petroleum resin, and the cementing modification material comprises the following components in percentage by mass: 40% of aliphatic resin, 2% of alicyclic resin, 2% of aromatic resin, 30% of aliphatic/aromatic copolymer resin and 26% of hydrogenated petroleum resin.
The anti-stripping component comprises calcium lignosulfonate, sodium lignosulfonate and petroleum resin, and the anti-stripping component comprises the following components in percentage by mass: 10% of calcium lignosulphonate, 15% of sodium lignosulphonate and 75% of petroleum resin.
Example 11
A cool road surface mix which differs from example 7 in that: the mass percentage of the mineral aggregate in the cool road surface mixture is 95%, and the mass percentage of the cool road surface material in the cool road surface mixture is 5%.
The cool pavement material comprises an adsorption water retention material, a cementing modification material and an anti-stripping component. The cool pavement material comprises the following components in percentage by mass: 25% of adsorption water-retention material, 50% of cementing modification material and 25% of anti-stripping component.
The water-absorbing and water-retaining material comprises calcium chloride, magnesium chloride, ferric chloride, aluminum chloride, calcium oxalate and potassium oxalate, and the mass percentages of the components in the water-absorbing and water-retaining material are as follows: 15% of calcium chloride, 5% of magnesium chloride, 30% of ferric chloride, 20% of aluminum chloride, 5% of calcium oxalate and 25% of potassium oxalate.
The cementing modification material comprises aliphatic resin, alicyclic resin, aromatic resin, aliphatic/aromatic copolymer resin and hydrogenated petroleum resin, and the cementing modification material comprises the following components in percentage by mass: 15% of aliphatic resin, 35% of alicyclic resin, 20% of aromatic resin, 5% of aliphatic/aromatic copolymer resin and 25% of hydrogenated petroleum resin.
The anti-stripping component comprises calcium lignosulfonate, sodium lignosulfonate and petroleum resin, and the anti-stripping component comprises the following components in percentage by mass: 15% of calcium lignosulphonate, 45% of sodium lignosulphonate and 40% of petroleum resin.
Example 12
A cool road surface mix which differs from example 7 in that: the mass percentage of the mineral aggregate in the cool and refreshing road surface mixture is 85 percent, and the mass percentage of the cool and refreshing road surface material in the cool and refreshing road surface mixture is 15 percent.
The cool pavement material comprises an adsorption water retention material, a cementing modification material and an anti-stripping component. The cool pavement material comprises the following components in percentage by mass: 45% of adsorption water retention material, 50% of cementing modification material and 5% of anti-stripping component.
The water-absorbing and water-retaining material comprises calcium chloride, magnesium chloride, ferric chloride, aluminum chloride, calcium oxalate and potassium oxalate, and the mass percentages of the components in the water-absorbing and water-retaining material are as follows: 10% of calcium chloride, 10% of magnesium chloride, 20% of ferric chloride, 20% of aluminum chloride, 20% of calcium oxalate and 20% of potassium oxalate.
The cementing modification material comprises aliphatic resin, alicyclic resin, aromatic resin, aliphatic/aromatic copolymer resin and hydrogenated petroleum resin, and the cementing modification material comprises the following components in percentage by mass: 20% of aliphatic resin, 20% of alicyclic resin, 20% of aromatic resin, 20% of aliphatic/aromatic copolymer resin and 20% of hydrogenated petroleum resin.
The anti-stripping component comprises calcium lignosulfonate, sodium lignosulfonate and petroleum resin, and the anti-stripping component comprises the following components in percentage by mass: 34% of calcium lignosulphonate, 33% of sodium lignosulphonate and 33% of petroleum resin.
The test data of the cool pavement materials of examples 1 to 6 described above, and the test data of the cool pavement compounds of examples 7 to 12, are shown in tables 2 to 7, respectively.
The cool pavement materials prepared in examples 1 to 6 were subjected to the performance tests of penetration, ductility, softening point, and the like according to the test protocol for road engineering asphalt and asphalt mixture (JTJ E20-2011), and the test results are shown in table 2.
TABLE 2 Performance test results for cool road materials
| Example numbering | Penetration (25 ℃, 100g, 0.1mm) | Ductility (cm) | Softening Point (. degree. C.) |
| Example 1 | 90.7 | 28.3 | 53.4 |
| Example 2 | 92.6 | 31.8 | 54.1 |
| Example 3 | 89.3 | 27.2 | 53.9 |
| Example 4 | 87.0 | 29.6 | 53.4 |
| Example 5 | 98.5 | 28.9 | 55.1 |
| Example 6 | 94.9 | 28.4 | 54.9 |
Marshall test samples are prepared according to the test procedure of road engineering asphalt and asphalt mixture (JTG E20-211), and the prepared test samples are placed in a dry environment for 72 hours and then subjected to hygroscopicity test and cooling test.
Test sample (m)0G) drying at 105 deg.C, placing in constant temperature and humidity environment with relative humidity RH of 80% at 35 deg.C, weighing the weight of the sample (m) after 72hpG), the weight of the test specimen was constant at this time, a dry-wet equilibrium state was achieved, and the average water film thickness of the test specimen was calculated as (mp-m0)/0.324 in mm, and the calculation results are shown in table 3. The average water film thickness represents the moisture absorption capacity of the cool and refreshing road surface mixture, and the larger the moisture absorption capacity is, the better the cooling effect after phase change is; the difference in the drop in the road surface temperature characterizes the temperature control ability of the cool and refreshing road surface mixture, and as shown in table 4, the greater the difference in the drop in the road surface temperature, the better the cooling effect of the road surface. The temperature control effect of the mixture of example 3 is the best in combination.
TABLE 3 average Water film thickness of Cool pavement Material mix
| Example numbering | Average water film thickness (mm) |
| AC-16 common asphalt mixture | 0.00 |
| Example 1 | 0.53 |
| Example 2 | 0.54 |
| Example 3 | 0.78 |
| Example 4 | 0.77 |
| Example 5 | 0.73 |
| Example 6 | 0.72 |
TABLE 4 cooling notes for cool road surface material blends
| Example numbering | Road surface temperature drop Difference (. degree. C.) |
| AC-16 common asphalt mixture | 0.00 |
| Example 1 | 10.4 |
| Example 2 | 11.3 |
| Example 3 | 13.8 |
| Example 4 | 13.4 |
| Example 5 | 12.9 |
| Example 6 | 12.6 |
The cool road surface mixes prepared in examples 7 to 12 were subjected to low-temperature crack resistance, high-temperature dynamic stability and freeze-thaw splitting tests, and the test results are shown in tables 5 to 7. From the test results, the low-temperature anti-cracking performance, the high-temperature stability performance and the freeze-thaw cleavage performance of the cool pavement mixture are basically unchanged.
TABLE 5 Low-temperature crack resistance test results for cool road mix
| Example numbering | Maximum load (N) | Midspan deflection (mm) |
| 90# common asphalt mixture | 1994 | 2.30 |
| Example 7 | 1982 | 2.27 |
| Example 8 | 1978 | 2.22 |
| Example 9 | 1975 | 2.25 |
| Example 10 | 1974 | 2.29 |
| Example 11 | 1978 | 2.30 |
| Example 12 | 1981 | 2.27 |
TABLE 6 test results of high temperature stability of cool road mix
| Example numbering | Degree of dynamic stability (mm/times) |
| 90# common asphalt mixture | 1285 |
| Example 7 | 1369 |
| Example 8 | 1260 |
| Example 9 | 1259 |
| Example 10 | 1261 |
| Example 11 | 1280 |
| Example 12 | 1296 |
TABLE 7 Freeze-thaw splitting performance test results of cool and refreshing pavement mixture
Finally, the method of the present invention is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A cool road surface material, comprising: an adsorption water retention material and a cementing modification material; the substances forming the water-absorbing and water-retaining material have growth preferred orientation, and the growth preferred orientation forms the main axis direction of the vertebral body along the close-packed surface; the cementing modified material comprises 65-80% of a matrix cementing component, 5-10% of polymer fibers and 10-30% of a thickening agent, wherein the matrix cementing component is hydrogenated petroleum resin.
2. A cool pavement material according to claim 1, wherein: the adsorption water-retention material is one or more of calcium chloride, magnesium chloride, ferric chloride, aluminum chloride, calcium sulfonate, calcium oxalate and potassium oxalate.
3. A cool pavement material according to claim 1, wherein: the mass percentage of the matrix cementing component in the cementing modified material is 65-75%, the mass percentage of the polymer fiber in the cementing modified material is 7-10%, and the mass percentage of the thickening agent in the cementing modified material is 18-25%.
4. A cool pavement material according to claim 1, wherein: the anti-stripping agent also comprises an anti-stripping component, wherein the anti-stripping component is one or more of calcium lignosulfonate, sodium lignosulfonate and petroleum resin.
5. A cool pavement material according to claim 4, characterized in that: the mass percentage of the adsorption water-retention material in the cool pavement material is 20-40%, the mass percentage of the cementing modification material in the cool pavement material is 40-55%, and the mass percentage of the anti-stripping component in the cool pavement material is 5-40%.
6. A cool pavement material according to claim 4, characterized in that: the mass percentage of the adsorption water-retention material in the cool pavement material is 30-40%, the mass percentage of the cementing modification material in the cool pavement material is 40-55%, and the mass percentage of the anti-stripping component in the cool pavement material is 5-30%.
7. A cool pavement material according to claim 4, characterized in that: the mass percentage of the adsorption water-retention material in the cool pavement material is 35-40%, the mass percentage of the cementing modification material in the cool pavement material is 45-55%, and the mass percentage of the anti-stripping component in the cool pavement material is 5-20%.
8. A cool pavement material as set forth in claim 1, comprising: an adsorption water-retention material for retaining and controlling the temperature by phase change, a cementing modification material for reducing the absorption of solar radiation of a pavement and an anti-stripping component for preventing the pavement from cracking;
the adsorption water retention material is one or more of calcium chloride, magnesium chloride, ferric chloride, aluminum chloride, calcium sulfonate, calcium oxalate and potassium oxalate;
the cementing modification material comprises a matrix cementing component, high molecular fibers and a thickening agent, wherein the matrix cementing component is hydrogenated petroleum resin;
the anti-stripping component is one or more of calcium lignosulfonate, sodium lignosulfonate and petroleum resin.
9. A method for producing a cool road surface material according to any one of claims 1 to 8, comprising:
step S1, heating the adsorption water retention material, the cementing modification material and the anti-stripping component according to the proportion, and uniformly mixing to obtain a uniformly mixed mixture;
and step S2, putting the mixture into an oven for development to obtain the cool pavement material.
10. A cool road surface compound containing the cool road surface material according to any one of claims 1 to 8, comprising: pavement materials and mineral aggregates.
11. A cool road surface compound according to claim 10, wherein: the mass percent of the pavement material is 1-20%, and the mass percent of the mineral aggregate is 80-99%.
12. A cool road surface compound according to claim 10, wherein: the cool pavement material comprises, by mass, 3% -10% of the cool pavement material and 90% -97% of the mineral aggregate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710439808.3A CN107286683B (en) | 2017-06-12 | 2017-06-12 | Cool pavement material, cool pavement mixture and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710439808.3A CN107286683B (en) | 2017-06-12 | 2017-06-12 | Cool pavement material, cool pavement mixture and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107286683A CN107286683A (en) | 2017-10-24 |
| CN107286683B true CN107286683B (en) | 2020-06-30 |
Family
ID=60096534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710439808.3A Active CN107286683B (en) | 2017-06-12 | 2017-06-12 | Cool pavement material, cool pavement mixture and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107286683B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319091A (en) * | 2007-06-07 | 2008-12-10 | 深圳市海川实业股份有限公司 | Colorful asphalt emulsion, preparation, and application in colorful slurry sealing layer |
| CN102432230A (en) * | 2011-09-20 | 2012-05-02 | 武汉理工大学 | Preparation method for deicing, antiskid and denoising asphalt pavement material |
| CN102644225A (en) * | 2012-04-24 | 2012-08-22 | 唐山市交通运输局 | Multifunctional self-snow-melting, anti-skidding, water-drainage and noise-reduction bituminous pavement |
| CN104788973A (en) * | 2015-04-08 | 2015-07-22 | 北京建筑大学 | Dust-suppression and haze-reduction asphalt modifier and preparation method thereof |
| CN104788972A (en) * | 2015-04-08 | 2015-07-22 | 北京建筑大学 | Dust-suppression and haze-reduction asphalt and preparation method thereof |
| CN104803629A (en) * | 2015-04-08 | 2015-07-29 | 北京建筑大学 | Dust-suppression and haze-reduction bituminous mixture and preparation method thereof |
-
2017
- 2017-06-12 CN CN201710439808.3A patent/CN107286683B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319091A (en) * | 2007-06-07 | 2008-12-10 | 深圳市海川实业股份有限公司 | Colorful asphalt emulsion, preparation, and application in colorful slurry sealing layer |
| CN102432230A (en) * | 2011-09-20 | 2012-05-02 | 武汉理工大学 | Preparation method for deicing, antiskid and denoising asphalt pavement material |
| CN102644225A (en) * | 2012-04-24 | 2012-08-22 | 唐山市交通运输局 | Multifunctional self-snow-melting, anti-skidding, water-drainage and noise-reduction bituminous pavement |
| CN104788973A (en) * | 2015-04-08 | 2015-07-22 | 北京建筑大学 | Dust-suppression and haze-reduction asphalt modifier and preparation method thereof |
| CN104788972A (en) * | 2015-04-08 | 2015-07-22 | 北京建筑大学 | Dust-suppression and haze-reduction asphalt and preparation method thereof |
| CN104803629A (en) * | 2015-04-08 | 2015-07-29 | 北京建筑大学 | Dust-suppression and haze-reduction bituminous mixture and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107286683A (en) | 2017-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tan et al. | Evaluation of the properties and carbon sequestration potential of biochar-modified pervious concrete | |
| WO2008049312A1 (en) | An asphalt modifier for improving rutting resistance of pavements | |
| CN109650781B (en) | Medium-low temperature warm-mixed high-friction thin-layer overlay asphalt mixture and preparation method thereof | |
| Jiang et al. | Experimental study on materials composition design and mixture performance of water-retentive asphalt concrete | |
| CN104151844B (en) | A kind of cationic emulsified modified asphalt and the application in plate-type ballastless track | |
| CN106630731B (en) | A kind of composite modifier and its preparation are dispersed the drainage asphalt concrete of performance with highly resistance | |
| CN109385106A (en) | Low viscous high performance modified bitumen of one kind and preparation method thereof | |
| CN110643185A (en) | Reaction type high-viscosity liquid asphalt and preparation method and application thereof | |
| CN103508702B (en) | A kind of Cold-mix phase change type asphalt mixture for thermal energy storage | |
| CN113186772A (en) | Light heat-insulating semi-flexible anti-crack pavement and preparation method thereof | |
| CN106336673B (en) | A kind of bio oil compounding nano diatomite modified pitch and preparation method thereof | |
| CN112430012A (en) | Basalt composite fiber and asphalt mixture containing basalt composite fiber | |
| CN107286683B (en) | Cool pavement material, cool pavement mixture and preparation method thereof | |
| CN106904925A (en) | A kind of ardealite based self-leveling material | |
| CN108328967A (en) | A kind of high perdurable concrete and preparation method thereof | |
| CN105130314A (en) | Modified cement slurry for rapidly repairing concrete | |
| CN104944843A (en) | High-performance asphalt mixture for steel bridge floor pavement and preparation method thereof | |
| CN107399924B (en) | High-viscosity colored cementing modified material, cementing modified mixture and preparation method | |
| CN107022198B (en) | A kind of bionical self-healing property pitch and preparation method thereof | |
| CN113817330A (en) | Permeable asphalt and improved construction method thereof | |
| CN114031337A (en) | Vibration-pressure-free self-curing cement stabilized macadam mixture and preparation method and application thereof | |
| CN104556886A (en) | Emulsified asphalt cement mortar for CRTS I-type slab ballastless track and preparation method thereof | |
| CN115490461B (en) | Recycled asphalt concrete and preparation method thereof | |
| CN109233701A (en) | A kind of preparation method of weathering crack resistance type bituminous cements | |
| CN103980412B (en) | A kind of preparation method of nano core-shell structure efficient molecular sieve drier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |