CN114477905A - Anti-crack road base material and preparation method thereof - Google Patents
Anti-crack road base material and preparation method thereof Download PDFInfo
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- CN114477905A CN114477905A CN202210143249.2A CN202210143249A CN114477905A CN 114477905 A CN114477905 A CN 114477905A CN 202210143249 A CN202210143249 A CN 202210143249A CN 114477905 A CN114477905 A CN 114477905A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses an anti-cracking road base material and a preparation method thereof, the base material depends on actual engineering, base and surface layers are continuously constructed, an anti-cracking agent is added into a cement stabilized macadam base material, the anti-cracking agent is phosphogypsum which is a main expanding and retarding material, citric acid is an auxiliary coagulation regulating material, and the mass ratio of the materials is phosphogypsum: the citric acid is 60-180: 1, the anti-cracking agent can prolong the initial setting time of the cement stabilizing material by 6-10 h, and the anti-cracking agent has micro-expansibility and compactness and reduces the porosity performance of cement stabilizing macadam. The base material prepared by the invention can delay the setting and hardening time of the base so as to realize the implementation of continuous construction in the construction process in terms of time, and can improve the performance of resisting dry shrinkage and temperature shrinkage cracking of the semi-rigid base, thereby overcoming or relieving the early damage problem of the semi-rigid base asphalt pavement, particularly the occurrence of reflection cracks and slippage diseases.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to an anti-cracking road base material and a preparation method thereof.
Background
The cement stabilized macadam asphalt pavement has excellent pavement performance such as high strength, good stability and the like, is a main pavement structure of a high-grade highway in China at present, but the problems of cracks and interlaminar shear slip of the cement stabilized macadam asphalt pavement cannot be effectively solved due to the characteristics of a cement stabilizing material and the restriction of the construction process of the existing asphalt pavement. In particular to the early diseases of the pavement caused by the early cracking problem of the cement stabilized macadam asphalt pavement, and the service life of the pavement is greatly shortened.
The problem of interlayer slippage disease of the asphalt pavement is inseparable from the existing pavement design method and interlayer construction treatment technology in China. In China, due to the rapid increase of heavy-duty vehicles and traffic volume, the requirement on the bearing capacity of a base layer is high when the pavement structure is designed, so that a semi-rigid base layer with high strength and rigidity becomes the first choice. However, the modulus of the flexible asphalt surface layer is small, the pavement structure is inverted, and under the action of heavy load, a weak contact surface between the base surface layers generates large shear stress, so that shearing slippage damage occurs between the layers.
In the traditional cement stabilized macadam base asphalt pavement construction process, firstly, a cement stabilized base is paved, the base is maintained for 7 days by sprinkling water, then permeable layer oil is sprinkled to make a seal layer, and the construction method has the following problems: the base layer is watered for health maintenance, the water content is unstable, so that the base layer is sensitive to humidity change, and the base layer is easy to shrink and crack due to moisture change and shrinkage crack in advance due to moisture change; the base course needs 7 days of maintenance, the construction time is long, the construction period is not economical, the base course is easily influenced by weather, and the quality of the base course is unstable; during the curing period, the temperature cracks are easily caused by the influence of day and night temperature difference under the exposure condition, and the cracks are generated before the surface layer is paved; meanwhile, in the maintenance process, the top surface of the base layer is easy to pollute, so that the oil-permeable layer is unevenly spread, hidden troubles are buried in the bonding between the base layer and the surface layer, the cracking resistance and the shearing slip resistance of the base layer and the surface layer are reduced, and the traffic influence is long due to the long construction period.
Therefore, the invention relies on the actual engineering, starts from the aspects of continuous construction and material performance of the pavement base and the surface layer, invents the base material of the anti-crack road, on one hand, the time of setting and hardening of the base is delayed, so that the implementation of the continuous construction can be realized in the construction process in terms of time, on the other hand, the performance of resisting the drying shrinkage and the temperature shrinkage cracking of the semi-rigid base is improved, and the early damage problem of the semi-rigid base asphalt pavement, particularly the occurrence of the reflection crack and the slippage disease is overcome or relieved.
Disclosure of Invention
Based on the prior art, the invention aims to provide an anti-crack road base material and a preparation method thereof, the prepared base material delays the setting and hardening time of the base so that the implementation of continuous construction can be realized in the construction process in time, and improves the performance of resisting drying shrinkage and temperature shrinkage cracking of the semi-rigid base, and overcomes or relieves the early damage problem of the semi-rigid base asphalt pavement, particularly the occurrence of reflection cracks and slippage diseases.
In order to achieve the above purpose, the invention adopts the technical scheme that:
the anti-cracking road base material is a mixture of cement-stabilized macadam and an anti-cracking agent, wherein the addition amount of the anti-cracking agent is 1-10% of the mass of the cement-stabilized macadam.
In order to better realize the invention, further, the cement-stabilized macadam is prepared by mixing the following components in parts by weight: 5-20 parts of cement, 100-200 parts of broken stone and 20-30 parts of fly ash.
In order to better realize the invention, the crack-resistant agent is further an alunite, phosphogypsum, wollastonite and a retarder, and the mass ratio of the alunite to the phosphogypsum to the wollastonite is: phosphogypsum: wollastonite: the retarding component is 60-180: 100-200: 1.
The retarding component is one or two of citric acid, tartaric acid and borax.
In order to better realize the invention, the crushed stone is graded crushed stone, the mass ratio of the crushed stone is 15-20% of coarse particles, the particle diameter of the crushed stone is 50-80 mm, 20-25% of medium particles, the particle diameter of the crushed stone is 30-50 mm, 20-25% of small particles, the particle diameter of the crushed stone is 10-20 mm, the particle diameter of the crushed stone is 10-15%, the particle diameter of the crushed stone is 5-10 mm, and the particle diameter of the crushed stone is 0-5 mm.
In order to better implement the present invention, further, the cement is one of ordinary portland cement, composite portland cement, portland slag cement, and portland pozzolan cement.
The invention also provides a preparation method of the anti-crack road base material, which comprises the following steps:
step one, raw material preparation: weighing the raw materials according to the parts by weight for later use;
step two, preparing cement stabilized macadam, mixing and stirring cement, macadam and fly ash in a mixer, and uniformly mixing;
adding an anti-cracking agent into the uniformly mixed cement stabilized macadam, continuously mixing and stirring in a mixer, and uniformly mixing to obtain a dry powder sand material of the anti-cracking road base material;
and step four, weighing dry powder and water of the anti-crack road base material in proportion at a mixing station or a construction site, and uniformly mixing by adopting a forced mixer for use.
The construction can be continuously carried out, after the base material is paved and rolled, the paving and rolling of the surface layer asphalt mixture are directly carried out, and the continuous flow line production of the base layer is realized.
In order to better realize the method, further, in the second step, the mixing and stirring time of the cement, the broken stone, the fly ash, the sand and the stone chips is 2-4 min; and in the third step, stirring and mixing the cement stabilized macadam and the anti-cracking agent again for 2-5 min.
Advantageous effects
The invention has the following beneficial effects:
1. the invention adds alunite, phosphogypsum, wollastonite and a retarder in the base material, the alunite, the phosphogypsum and the cement stabilized macadam generate a product with certain micro expansibility after hydration, the shrinkage of the cement stabilized macadam under the temperature and humidity change is compensated to a certain extent, simultaneously, the early strength development of the base material is stable, the anti-drying shrinkage and temperature shrinkage performances of the base material are improved, and the occurrence of reflection cracks is reduced. The wollastonite powder has certain volcanic ash activity, and the particles of the wollastonite powder are fibrous, so that the bending resistance and the impact resistance of a hydration product can be improved, and the brittleness and the durability of a base material can be improved. The retarding component can regulate the hydration process of the hydration product and ensure the stable hydration reaction.
2. When the anti-crack road base material is constructed, the surface layer can be immediately paved without maintenance after the base layer is paved, and the traditional semi-rigid base layer watering maintenance mode is changed. The pavement of the surface layer mixture is carried out after the base layer is paved, because the temperature of the asphalt mixture is higher, a higher temperature field can be formed on the surface of the base layer, the high-temperature natural curing of the base layer is realized, the cement hydration is early in a stable environment with higher temperature, the hydration reaction is fast, and the hydration delay caused by the anticoagulation of the crack-resisting agent is compensated. Meanwhile, the strength of the base layer is rapidly increased, the adverse effect of the base layer caused by the temperature change of the external environment is overcome, and the cracking of the base layer caused by the temperature difference stress generated by the temperature change is reduced.
3. The anti-crack road base material has good and continuous interlayer bonding state of the base layer. The continuous construction surface layer is paved before the base layer is solidified and hardened, and the surface layer aggregate is embedded and extruded to a certain depth of the surface mixture of the base layer under the vibration rolling action of the road roller. The base layer and the surface layer are interlocked due to the mutual interlocking, the contact surfaces are staggered, and the interlayer friction is large. The basal plane layers begin to mutually permeate at the beginning of the hydration of the cementing material of the basal layer until the structural layer is hardened and hardened, so that the interlaminar interface has good bonding effect, the stress condition of the pavement structure is changed, and the possibility of interlaminar shear slip damage is fundamentally solved. And when the external temperature changes sharply to generate larger shrinkage stress in the surface layer, the shrinkage coefficient of the cement stabilized macadam base layer material is smaller than that of the surface layer material, so that the shrinkage of the surface layer must overcome the resistance effect of the base layer due to the continuous condition between the layers, the low-temperature stability of the semi-rigid base layer Zhe cyan pavement is improved, and the crack retardation effect of the base layer is obvious.
4. The anti-cracking road base material can realize a continuous construction technology in the construction of semi-rigid road surfaces, shorten the construction time and reduce the occurrence of work nest. The continuous flowing water of the base surface layer is paved and rolled, so that the procedures of treating pollution between layers, applying a permeable layer and preserving the life of the base layer can be saved, the construction period is shortened, the construction cost is saved, meanwhile, the pollution between the base surface layers is reduced, the interlayer bonding hidden danger is eliminated, and the road quality is improved.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example 1
The embodiment provides an anti-cracking road base material, which is a mixture of cement stabilized macadam and an anti-cracking agent, wherein the cement stabilized macadam is prepared by mixing the following components in parts by weight: 5 parts of ordinary portland cement, 100 parts of broken stone and 30 parts of fly ash; the crack resistance agent is alunite, phosphogypsum, wollastonite and a retarder, and the mass ratio of the crack resistance agent to the alunite is: phosphogypsum: wollastonite: the retarding component is 60:60:100: 1. The dosage of the cement stabilized macadam is 2 percent of the total mass of the cement stabilized macadam.
The retarding component is citric acid.
The gravel is graded gravel, the composition mass ratio of the gravel is 20% of coarse particles, the particle diameter of the gravel is 50-80 mm, the particle diameter of medium particles is 20%, the particle diameter of the gravel is 30-50 mm, the particle diameter of small particles is 25%, the particle diameter of the gravel is 10-20 mm, the particle diameter of fine particles is 25%, the particle diameter of the gravel is 5-10 mm, and the particle diameter of the gravel is 10% and 0-5 mm.
The embodiment also provides a preparation method of the anti-crack road base material, which comprises the following steps:
step one, raw material preparation: weighing the raw materials according to the parts by weight for later use;
step two, preparing cement stabilized macadam, mixing and stirring cement, macadam and fly ash in a mixer for 2min, and uniformly mixing;
adding an anti-cracking agent into the uniformly mixed cement stabilized macadam, continuously mixing and stirring in a mixer for 2min, and uniformly mixing to obtain a dry powder of the anti-cracking road base material;
and step four, weighing the dry powder mortar of the anti-crack road base material and water in a mixing plant or a construction site according to a proportion, and uniformly mixing by adopting a forced mixer for use.
The construction can be continuously carried out, after the base material is paved and rolled, the paving and rolling of the surface layer asphalt mixture are directly carried out, and the continuous flow line production of the base layer is realized.
Example 2
The embodiment provides an anti-cracking road base material, which is a mixture of cement stabilized macadam and an anti-cracking agent, wherein the cement stabilized macadam is prepared by mixing the following components in parts by weight: 10 parts of composite portland cement, 120 parts of broken stone and 28 parts of fly ash;
the crack resistance agent is alunite, phosphogypsum, wollastonite and a retarder, and the mass ratio of the crack resistance agent to the alunite is: phosphogypsum: wollastonite: the retarding component is 80:80:120: 1. The dosage of the cement stabilized macadam is 3 percent of the total mass of the cement stabilized macadam.
The retarding component is tartaric acid.
The crushed stone is graded crushed stone, the mass ratio of the crushed stone is 15% of coarse particles, the particle diameter of the crushed stone is 50-80 mm, 25% of medium particles are 30-50 mm, 25% of small particles are 10-20 mm, the particle diameter of the crushed stone is 20%, the particle diameter of the crushed stone is 5-10 mm, and the particle diameter of the crushed stone is 0-5 mm.
The embodiment also provides a preparation method of the anti-crack road base material, which comprises the following steps:
step one, raw material preparation: weighing the raw materials according to the parts by weight for later use;
step two, preparing cement stabilized macadam, mixing and stirring cement, macadam and fly ash in a mixer for 3min, and uniformly mixing;
adding an anti-cracking agent into the uniformly mixed cement stabilized macadam, continuously mixing and stirring in a mixer for 3min, and uniformly mixing to obtain a dry powder of the anti-cracking road base material;
and step four, weighing dry powder and water of the anti-crack road base material in proportion at a mixing station or a construction site, and uniformly mixing by adopting a forced mixer for use.
The construction can be continuously carried out, after the base material is paved and rolled, the paving and rolling of the surface layer asphalt mixture are directly carried out, and the continuous flow line production of the base layer is realized.
Example 3
The embodiment provides an anti-cracking road base material, which is a mixture of cement stabilized macadam and an anti-cracking agent, wherein the cement stabilized macadam is prepared by mixing the following components in parts by weight: 14 parts of ordinary portland cement, 150 parts of broken stone and 25 parts of fly ash;
the crack resistance agent is alunite, phosphogypsum, wollastonite and a retarder, and the mass ratio of the crack resistance agent to the alunite is: phosphogypsum: wollastonite: the set retarding component is 120:120:140: 1. The dosage of the cement stabilized macadam is 4 percent of the total mass of the cement stabilized macadam.
The retarding component is borax.
The crushed stone is graded crushed stone, the mass ratio of the crushed stone is 18% of coarse particles, the particle diameter of the crushed stone is 50-80 mm, 25% of medium particles are 30-50 mm, 23% of small particles are 10-20 mm, the particle diameter of the crushed stone is 19% of fine particles, the particle diameter of the crushed stone is 5-10 mm, and the particle diameter of the crushed stone is 0-5 mm.
The embodiment also provides a preparation method of the anti-crack road base material, which comprises the following steps:
step one, raw material preparation: weighing the raw materials according to the parts by weight for later use;
step two, preparing cement stabilized macadam, mixing and stirring cement, macadam and fly ash in a mixer for 3min, and uniformly mixing;
adding an anti-cracking agent into the uniformly mixed cement stabilized macadam, continuously mixing and stirring in a mixer for 4min, and uniformly mixing to obtain a dry powder of the anti-cracking road base material;
and step four, weighing dry powder and water of the anti-crack road base material in proportion at a mixing station or a construction site, and uniformly mixing by adopting a forced mixer for use.
The construction can be continuously carried out, after the base material is paved and rolled, the paving and rolling of the surface layer asphalt mixture are directly carried out, and the continuous flow line production of the base layer is realized.
Example 4
The embodiment provides an anti-cracking road base material, which is a mixture of cement stabilized macadam and an anti-cracking agent, wherein the cement stabilized macadam is prepared by mixing the following components in parts by weight: 16 parts of slag portland cement, 180 parts of broken stone and 22 parts of fly ash;
the crack resistance agent is alunite, phosphogypsum, wollastonite and a retarder, and the mass ratio of the crack resistance agent to the alunite is: phosphogypsum: wollastonite: the retarding component is 150:150:150: 1. The dosage of the cement stabilized macadam is 6 percent of the total mass of the cement stabilized macadam.
The retarding component is a mixture of citric acid and tartaric acid with the same mass.
The crushed stone is graded crushed stone, the mass ratio of the crushed stone is 20% of coarse particles, the particle diameter of the crushed stone is 50-80 mm, the particle diameter of the medium particles is 20%, the particle diameter of the medium particles is 30-50 mm, the particle diameter of the small particles is 25%, the particle diameter of the medium particles is 10-20 mm, the particle diameter of the medium particles is 20%, the particle diameter of the medium particles is 5-10 mm, and the particle diameter of the crushed stone is 15% and 0-5 mm.
The embodiment also provides a preparation method of the anti-crack road base material, which comprises the following steps:
step one, raw material preparation: weighing the raw materials according to the parts by weight for later use;
step two, preparing cement stabilized macadam, mixing and stirring cement, macadam and fly ash in a mixer for 3min, and uniformly mixing;
adding an anti-cracking agent into the uniformly mixed cement stabilized macadam, continuously mixing and stirring in a mixer for 4min, and uniformly mixing to obtain a dry powder of the anti-cracking road base material;
and step four, weighing dry powder and water of the anti-crack road base material in proportion at a mixing station or a construction site, and uniformly mixing by adopting a forced mixer for use.
The construction can be continuously carried out, after the base material is paved and rolled, the paving and rolling of the surface layer asphalt mixture are directly carried out, and the continuous flow line production of the base layer is realized.
Example 5
The embodiment provides an anti-cracking road base material, which is a mixture of cement stabilized macadam and an anti-cracking agent, wherein the cement stabilized macadam is prepared by mixing the following components in parts by weight: 20 parts of pozzolanic portland cement, 200 parts of broken stone and 20 parts of fly ash;
the crack resistance agent is alunite, phosphogypsum, wollastonite and a retarder, and the mass ratio of the crack resistance agent to the alunite is: phosphogypsum: wollastonite: the retarding component is 180:180:200: 1. The dosage of the cement stabilized macadam is 8 percent of the total mass of the cement stabilized macadam.
The retarding component is citric acid.
The crushed stone is graded crushed stone, the mass ratio of the crushed stone is 20% of coarse particles, the particle diameter of the crushed stone is 50-80 mm, 25% of medium particles are 30-50 mm, 25% of small particles are 10-20 mm, the particle diameter of the crushed stone is 15%, the particle diameter of the crushed stone is 5-10 mm, and the particle diameter of the crushed stone is 0-5 mm.
The embodiment also provides a preparation method of the anti-crack road base material, which comprises the following steps:
step one, raw material preparation: weighing the raw materials according to the parts by weight for later use;
step two, preparing cement stabilized macadam, mixing and stirring cement, macadam and fly ash in a mixer for 4min, and uniformly mixing;
adding an anti-cracking agent into the uniformly mixed cement stabilized macadam, continuously mixing and stirring in a mixer for 5min, and uniformly mixing to obtain a dry powder of the anti-cracking road base material;
and step four, weighing dry powder and water of the anti-crack road base material in proportion at a mixing station or a construction site, and uniformly mixing by adopting a forced mixer for use.
The construction can be continuously carried out, after the base material is paved and rolled, the paving and rolling of the surface layer asphalt mixture are directly carried out, and the continuous flow line production of the base layer is realized.
The performance test was performed on the crack-resistant road base material prepared in the above examples 1 to 5, using cement paste or cement mortar as a material of reference 1.
The test method comprises the following steps: measurement of coagulation time: in the test process, the mixing amount of all additives is calculated according to the mass percentage of the cement, the additives are added by adopting an external mixing method, cement adhesive packages are prepared according to the fixed water-adhesive ratio of 0.35, and the cement setting time is tested according to GB/T1346-2011 'test method for water consumption, setting time and stability of cement standard consistency'. The results are shown in Table 1 below:
TABLE 1 clotting time
From the above test results, it can be seen that the initial setting time and the final setting time of the cement are both prolonged with the increase of the amount of the retarding component, and in example 5, when the amount of the retarding component is 8%, the initial setting time is prolonged from 256min when the cement is not blended to 381min, and is prolonged by 48.8%. Meanwhile, the setting time of the cement is gradually prolonged along with the increase of the mixing amount of the phosphogypsum, and the setting time is prolonged from 94min to 137min when the phosphogypsum is not mixed, and is prolonged by 45.7 percent by calculation according to the embodiment 5.
And a second testing method comprises the following steps: measurement of mechanical properties: the cement mortar strength is measured according to GB/T17671-1999 cement mortar strength test method (ISO method), the mass ratio of cement to ISO sand is 1:3, the test water cement ratio is 0.5, and the results are shown in the following table 2:
TABLE 2 mechanical Properties
| Sample numbering | 3 days rupture strength MPa | 28 days rupture strength MPa | Compressive strength MPa in 3 days | 28 days compressive strength MPa |
| Control 1 | 3.9 | 7.9 | 4.1 | 13.8 |
| Example 1 | 3.8 | 8.0 | 4.1 | 15.0 |
| Example 2 | 3.8 | 8.1 | 3.8 | 15.8 |
| Example 3 | 3.4 | 8.2 | 3.7 | 16.1 |
| Example 4 | 3.2 | 8.0 | 3.4 | 14.4 |
| Example 5 | 2.9 | 7.9 | 3.2 | 13.5 |
From the test results, the 3d and 28d flexural strength and compressive strength are gradually reduced along with the increase of the mixing amount of the retarding component, when the mixing amount is less than 4%, the strength is reduced less, and when the mixing amount is more than 4%, the strength is reduced, so that the mixing amount is selected according to the requirements of specific road sections during actual production and use, and the optimal effect is achieved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the 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 (7)
1. The anti-cracking road base material is characterized in that the base material is a mixture of cement stabilized macadam and an anti-cracking agent, wherein the dosage of the anti-cracking agent is 1-10% of the mass of the cement stabilized macadam.
2. The crack-resistant road base material as claimed in claim 1, wherein the cement stabilized macadam is prepared by mixing the following components in parts by weight: 5-20 parts of cement, 100-200 parts of broken stone and 20-30 parts of fly ash.
3. The crack-resistant road base material as claimed in claim 1, wherein the crack-resistant agent is alunite, phosphogypsum, wollastonite and a retarder, and the mass ratio of the crack-resistant agent to the retarder is alunite: phosphogypsum: wollastonite: the retarding component is 60-180: 100-200: 1.
The retarding component is one or two of citric acid, tartaric acid and borax.
4. The anti-crack road base material as claimed in claims 1 and 2, wherein the crushed stone is graded crushed stone, the composition mass ratio of the crushed stone is 15-20% of coarse particles, the particle diameter of the crushed stone is 50-80 mm, the particle diameter of the medium particles is 20-25%, the particle diameter of the medium particles is 30-50 mm, the particle diameter of the small particles is 20-25%, the particle diameter of the medium particles is 10-20 mm, the particle diameter of the fine particles is 10-15%, the particle diameter of the medium particles is 5-10 mm, and the particle diameter of the crushed stone is 10-15% and 0-5 mm.
5. The crack-resistant road base material according to claims 1 and 2, wherein the cement is one of ordinary portland cement, composite portland cement, portland slag cement, and portland pozzolan cement.
6. A method for preparing the crack-resistant road base material according to claim 1, comprising the steps of:
step one, raw material preparation: weighing the raw materials according to the parts by weight for later use;
step two, preparing cement stabilized macadam, mixing and stirring cement, macadam and fly ash in a mixer, and uniformly mixing;
adding an anti-cracking agent into the uniformly mixed cement stabilized macadam, continuously mixing and stirring in a mixer, and uniformly mixing to obtain a dry powder material of the anti-cracking road base material;
and step four, weighing dry powder and water of the anti-crack road base material in proportion at a mixing station or a construction site, and uniformly mixing by adopting a forced mixer for use.
The construction can be continuously carried out, after the base material is paved and rolled, the paving and rolling of the surface layer asphalt mixture are directly carried out, and the continuous flow line production of the base layer is realized.
7. The preparation method of the anti-crack road base material according to claim 6, wherein in the second step, the mixing and stirring time of cement, broken stone, fly ash, sand and stone chips is 2-4 min; and in the third step, stirring and mixing the cement stabilized macadam and the anti-cracking agent again for 2-5 min.
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| CN202210143249.2A CN114477905B (en) | 2022-02-16 | 2022-02-16 | Anti-crack road base material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114933451A (en) * | 2022-05-24 | 2022-08-23 | 东南大学 | Asphalt pavement crack dispersion type base material, design method and road structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04367552A (en) * | 1991-06-13 | 1992-12-18 | Asahi Chem Ind Co Ltd | Maintenance for steam-cured lightweight cellular concrete material |
| CN101275380A (en) * | 2008-05-16 | 2008-10-01 | 东南大学 | Application of plumping agent to cement stabilized macadam base |
| AU2009101336A4 (en) * | 2009-12-22 | 2010-02-25 | Jiangxi Ganyue Expressway Co Ltd | Cold-recycling emulsified asphalt mixture and method for pavement reconstruction |
| WO2017193629A1 (en) * | 2014-06-30 | 2017-11-16 | 上海浦东路桥建设股份有限公司 | Special grading modified asphalt mixture surface layer and paving method therefor |
| CN109987898A (en) * | 2019-03-20 | 2019-07-09 | 上海家根路基材料有限公司 | A kind of Cement Stable Macadam Mixture and its preparation process |
| CN111021178A (en) * | 2019-12-04 | 2020-04-17 | 东南大学 | Cement-stabilized anti-crack base newly-built pavement structure and construction method and application thereof |
| CN111549608A (en) * | 2020-04-23 | 2020-08-18 | 山东省交通科学研究院 | Anti-rutting pavement paving method capable of continuously paving base layer and surface layer |
-
2022
- 2022-02-16 CN CN202210143249.2A patent/CN114477905B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04367552A (en) * | 1991-06-13 | 1992-12-18 | Asahi Chem Ind Co Ltd | Maintenance for steam-cured lightweight cellular concrete material |
| CN101275380A (en) * | 2008-05-16 | 2008-10-01 | 东南大学 | Application of plumping agent to cement stabilized macadam base |
| AU2009101336A4 (en) * | 2009-12-22 | 2010-02-25 | Jiangxi Ganyue Expressway Co Ltd | Cold-recycling emulsified asphalt mixture and method for pavement reconstruction |
| WO2017193629A1 (en) * | 2014-06-30 | 2017-11-16 | 上海浦东路桥建设股份有限公司 | Special grading modified asphalt mixture surface layer and paving method therefor |
| CN109987898A (en) * | 2019-03-20 | 2019-07-09 | 上海家根路基材料有限公司 | A kind of Cement Stable Macadam Mixture and its preparation process |
| CN111021178A (en) * | 2019-12-04 | 2020-04-17 | 东南大学 | Cement-stabilized anti-crack base newly-built pavement structure and construction method and application thereof |
| CN111549608A (en) * | 2020-04-23 | 2020-08-18 | 山东省交通科学研究院 | Anti-rutting pavement paving method capable of continuously paving base layer and surface layer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114933451A (en) * | 2022-05-24 | 2022-08-23 | 东南大学 | Asphalt pavement crack dispersion type base material, design method and road structure |
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