CN116750993A - Functional polyurethane exposed stone pavement and preparation method thereof - Google Patents
Functional polyurethane exposed stone pavement and preparation method thereof Download PDFInfo
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- CN116750993A CN116750993A CN202310688937.1A CN202310688937A CN116750993A CN 116750993 A CN116750993 A CN 116750993A CN 202310688937 A CN202310688937 A CN 202310688937A CN 116750993 A CN116750993 A CN 116750993A
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- functional polyurethane
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- polyurethane
- exposed stone
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- 229920002635 polyurethane Polymers 0.000 title claims abstract description 44
- 239000004814 polyurethane Substances 0.000 title claims abstract description 44
- 239000004575 stone Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 239000002245 particle Substances 0.000 claims abstract description 19
- 238000011010 flushing procedure Methods 0.000 claims abstract description 18
- 239000004568 cement Substances 0.000 claims abstract description 12
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 39
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 28
- 239000010438 granite Substances 0.000 claims description 11
- 238000002791 soaking Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 9
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 6
- 235000019738 Limestone Nutrition 0.000 claims description 3
- 239000010426 asphalt Substances 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000006028 limestone Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 2
- 239000011435 rock Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 11
- 238000002844 melting Methods 0.000 abstract description 7
- 230000008018 melting Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 230000000052 comparative effect Effects 0.000 description 17
- 239000004567 concrete Substances 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000003756 stirring Methods 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical group OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 229940104869 fluorosilicate Drugs 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000000979 retarding effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 206010057362 Underdose Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical group O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/30—Coherent pavings made in situ made of road-metal and binders of road-metal and other binders, e.g. synthetic material, i.e. resin
-
- 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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/16—Polyurethanes
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/53—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone involving the removal of at least part of the materials of the treated article, e.g. etching, drying of hardened concrete
- C04B41/5323—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone involving the removal of at least part of the materials of the treated article, e.g. etching, drying of hardened concrete to make grain visible, e.g. for obtaining exposed aggregate concrete
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/91—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics involving the removal of part of the materials of the treated articles, e.g. etching
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/18—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/085—Aggregate or filler materials therefor; Coloured reflecting or luminescent additives therefor
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Road Paving Structures (AREA)
Abstract
The application relates to the technical field of pavement construction, in particular to the field of IPC E01C7, and more particularly relates to a functional polyurethane exposed stone pavement and a preparation method thereof. The components comprise: cementing material, aggregate and surface flushing agent; the cement comprises polyurethane. The melting temperature of the polyurethane is 280-320 ℃, the tensile strength is 15-25MPa, the elongation at break is 180-300%, the bonding performance and the skid resistance can be improved, and meanwhile, the bonding effect with the original pavement structure and the underlying layer is excellent; the aggregate comprises a first aggregate and a second aggregate, wherein the particle size of the first aggregate is 3-9.5mm, the particle size of the second aggregate is 9.5-15mm, and the weight ratio of the first aggregate to the second aggregate is (2-4): (6-8) the strength, the anti-skid property and the high and low temperature property of the pavement can be further improved.
Description
Technical Field
The application relates to the technical field of pavement construction, in particular to the field of IPC E01C7, and more particularly relates to a functional polyurethane exposed stone pavement and a preparation method thereof.
Background
In the construction process of the expressway, since the running speed of the vehicle is high, the expressway pavement is required to have excellent anti-slip and anti-dazzle functions, and the exposed stone concrete has excellent anti-slip, noise reduction, anti-dazzle and drainage functions. The existing preparation of the exposed stone concrete pavement comprises the following steps: after the cement concrete on the surface layer is poured and vibrated, a certain time is reserved, then a certain amount of stone exposing agent is sprayed on the surface of the cement concrete, the cement mortar on the surface layer is subjected to materialization treatment, and then the pavement is washed.
CN114835450a discloses a highway pavement high-performance exposed stone concrete and a construction method thereof. The raw materials comprise 126kg/m 3 Water of 370kg/m 3 Low heat portland cement of 703kg/m 3 River sand of which the grain diameter is not more than 2.36mm and 1251kg/m 3 Is a non-alkali activated crushed stone of 9.5-13.2mm and 9.25kg/m 3 The retarding type high-efficiency air-entraining water reducer ensures that the skid resistance and the noise reduction performance of the exposed concrete pavement are obviously improved.
CN111187044B discloses a exposed stone concrete and a construction method thereof, which comprises the following exposed stone concrete raw materials in parts by weight: 250-300 parts of cement, 1100-1200 parts of coarse aggregate, 750-850 parts of fine aggregate, 80-120 parts of mineral powder, 8-12 parts of water reducer and 140-180 parts of water; the construction method of the exposed stone concrete comprises the following steps: preparing a stone-exposing agent, preparing concrete, pouring a pavement and maintaining the pavement.
CN103232218B discloses a high-performance concrete stone remover and a preparation and application method thereof, the stone remover containing fluorosilicate and organic phosphorus is used for improving the retarding efficiency of the stone remover, reducing the dosage of the stone remover, being used for preparing the stone-removing concrete and improving the anti-slip and drainage properties of the stone-removing concrete. The fluorosilicate is not friendly to the environment, and brings a certain harm to the construction environment of the exposed stone concrete.
The cement is used as the cementing material, so that the cement concrete has light color and serious glare, and meanwhile, the construction process of the cement pavement is complex, and the flatness is controlled by vibrating, water collecting and plastering, so that the flatness directly relates to the effect of stone exposure. The concrete pavement has long life time and complex construction process. In addition, because the rigidity is high, the joint cutting is needed to avoid shrinkage cracks, so that the driving comfort is poor, and because the adhesion between the cement material and aggregate is poor, the phenomena of loosening, particle falling and the like are easy to occur after the cement material is molded.
Disclosure of Invention
The first aspect of the application provides a functional polyurethane exposed stone pavement, which comprises the following components: cementing material, aggregate and surface flushing agent.
The inventor researches find that the cementing material comprises polyurethane, wherein the melting temperature of the polyurethane is 280-320 ℃, the tensile strength of the polyurethane is 15-25MPa, the elongation at break is 180-300%, the cementing property and the anti-slip property can be improved, and the cementing material is especially characterized in that the cementing material comprises (2-4) of two weight ratios of 4.75-9.5mm of particle size and 9.5-13.2mm of particle size: the aggregate of (6-8) is compounded for use, the strength and the skid resistance of the pavement and the performance at high and low temperatures can be further improved, the two aggregates are compounded in proportion, the large-particle aggregate can play a role in skid resistance and skeleton support, the small-particle aggregate properly fills gaps, collapse caused by overlarge gaps is reduced, if the gaps are overlarge, the cementing material is difficult to adhere the aggregate, rainwater can enter the interior of a road structure more easily, the interface between the aggregate and the cementing material is stripped, so that serious water loss is generated on the pavement, the service life of the pavement is greatly reduced, the strength is reduced, meanwhile, the rigid skeleton formed by compounding the aggregates in a specific proportion limits the shrinkage effect of the cementing material, so that the performance of the pavement at high and low temperatures is improved, the dispersion performance of the pavement is improved, the dispersion time of the system is shortened, and the polyurethane possibly has extremely strong adhesive performance and can be matched with the acidic granite, so that the aggregate is well wrapped by the polyurethane. Meanwhile, the price of the acidic granite is low, and the general road aggregate has better performances of limestone and basalt, but the price is high.
The cementing material comprises polyurethane, wherein the melting temperature of the polyurethane is 280-320 ℃, the tensile strength of the polyurethane is 15-25MPa, and the elongation at break is 180-300%.
Preferably, the cementing material comprises single-component polyurethane, wherein the melting temperature of the polyurethane is 290-320 ℃, the tensile strength is 15-20MPa, and the elongation at break is 180-230%.
Further preferred, the cement comprises a one-component polyurethane having a melting temperature of 309.7 ℃, a tensile strength of 18.6MPa, an elongation at break of 210%, and a one-component polyurethane available from Wanhua chemical groups Co., ltd (test data reference: GB/T19250).
The aggregate comprises at least one of granite, basalt, meteoroid and limestone.
Preferably, the aggregate comprises acidic granite.
The aggregate comprises a first aggregate and a second aggregate, wherein the particle size of the first aggregate is 3-9.5mm, and the particle size of the second aggregate is 9.5-15mm.
Preferably, the aggregate comprises a first aggregate and a second aggregate, the first aggregate having a particle size of 4.75-9.5mm and the second aggregate having a particle size of 9.5-13.2mm.
The weight ratio of the first aggregate to the second aggregate is (2-4): (6-8).
Preferably, the weight ratio of the first aggregate to the second aggregate is 3:7.
the cementing material accounts for 2.5-6 weight percent of the aggregate.
Preferably, the binder comprises 4.8 weight percent of the aggregate.
The surface flushing agent comprises at least one of methyl ethyl ketone, acetone, ethyl acetate, dimethylacetamide and butyl acetate.
Preferably, the surface flushing agent comprises acetone and ethyl acetate, wherein the weight ratio of the acetone to the ethyl acetate is (13-15): (5-7).
Further preferably, the surface flushing agent comprises acetone and ethyl acetate, wherein the weight ratio of the acetone to the ethyl acetate is 7:3.
the application provides a preparation method of a functional polyurethane exposed stone pavement, which comprises the following steps:
s1, mixing cementing materials and aggregate, paving and rolling, and waiting for 3-5h for curing and forming;
s2, spraying a surface flushing agent on the surface of the solidified and formed product for soaking;
s3, cleaning by brushing to expose aggregate, and obtaining the modified asphalt.
The cementing material and the aggregate are mixed specifically comprising: the aggregate is dedusted and dried by a conveyor belt and then conveyed into a mixing pot, polyurethane is sprayed into the mixing pot for stirring for 2-3min, and the stirring speed is 60-70rpm.
Preferably, the cementing material and the aggregate mixture specifically comprise: the aggregate is dedusted and dried by a conveyor belt and then conveyed into a mixing pot, polyurethane is sprayed into the mixing pot for stirring for 3min, and the stirring speed is 60rpm.
The spraying amount is 0.12-0.20kg/m 2 。
Preferably, the amount of the spray is 0.15kg/m 2 。
The soaking time is 5-20min.
Preferably, the soaking time is 10min.
The depth of the exposed aggregate is 2-3.5mm.
Preferably, the depth of exposed aggregate is 2.5mm.
The thickness of the exposed stone pavement is 3.5-5cm.
Preferably, the thickness of the exposed stone pavement is 4cm.
The beneficial effects are that:
1. the cementing material comprises polyurethane, wherein the melting temperature of the polyurethane is 280-320 ℃, the tensile strength of the polyurethane is 15-25MPa, the elongation at break is 180-300%, the binding performance, the service life and the skid resistance can be improved, and meanwhile, the cementing material has excellent binding effect with the original pavement structure and the underlying layer.
2. The aggregate comprises a first aggregate and a second aggregate, wherein the particle size of the first aggregate is 3-9.5mm, the particle size of the second aggregate is 9.5-15mm, and the weight ratio of the first aggregate to the second aggregate is (2-4): (6-8) the strength, the anti-skid property and the high and low temperature property of the pavement can be further improved.
3. The spraying amount is 0.12-0.20kg/m 2 The soaking time is 5-20min, so that the pavement efficiency can be improved, and the anti-skid performance and the driving comfort can be improved. The flushing agent is insufficient in spraying quantity, cannot be soaked and dissolved to reach the proper dew Dan Shendu, the anti-slip performance is reduced, the soaking time is insufficient, the dissolving effect is insufficient, the surface is uneven, and the depth of the dew stone is insufficient.
4. The surface flushing agent comprises acetone and ethyl acetate, wherein the weight ratio of the acetone to the ethyl acetate is (13-15): (5-7), the reaction time can be reduced, the uniformity of the exposed stone surface can be improved, the depth of exposed aggregate can be controlled, and the water loss resistance and the fatigue life can be improved.
5. The acid aggregate granite and polyurethane are compounded for use, the thickness of the exposed stone pavement is 3.5-5cm, so that the pavement color is adjustable, the performance is designable, the construction process is simple, the service life is long, the maintenance period is long, the overall pavement structure is too low, the overall strength is reduced, and the construction is very easy to push due to the fact that the thickness of the structural layer is thinner.
6. The cementing material accounts for 2.5-6 weight percent of the aggregate, the strength and the high-low temperature performance can be improved, the dosage of the cementing material is too low, the surface of granite cannot be completely wrapped, and the particles of the aggregate are easy to loose due to insufficient dosage of the cementing material.
Detailed Description
Example 1
A functional polyurethane exposed stone pavement comprises the following components: cementing material, aggregate and surface flushing agent.
The cement was a one-component polyurethane having a melting temperature of 309.7 ℃and a tensile strength of 18.6MPa and an elongation at break of 210%, a one-component polyurethane available from Wanhua chemical group Co., ltd., model 6750F (test data reference: GB/T19250)
The aggregate is acid granite, the acid granite is a first aggregate and a second aggregate, the particle size of the first aggregate is 4.75-9.5mm, the particle size of the second aggregate is 9.5-13.2mm, and the weight ratio of the first aggregate to the second aggregate is 3:7.
the cementing material accounts for 4.8 weight percent of the aggregate.
The surface flushing agent is acetone and ethyl acetate, and the weight ratio of the acetone to the ethyl acetate is 7:3.
a preparation method of a functional polyurethane exposed stone pavement comprises the following steps:
s1, mixing cementing materials and aggregate, paving and rolling, and waiting for 4 hours for curing and forming;
s2, spraying a surface flushing agent on the surface of the solidified and formed product for soaking;
s3, cleaning by brushing to expose aggregate, and obtaining the modified asphalt.
The concrete steps of the cementing material and the aggregate are as follows: the aggregate is dedusted and dried by a conveyor belt and then conveyed into a mixing pot, polyurethane is sprayed into the mixing pot for stirring for 3min, and the stirring speed is 60rpm.
The amount of the spray was 0.15kg/m 2 The soaking time is 10min, and the depth of the exposed aggregate is 2.5mm.
The thickness of the exposed stone pavement is 4cm.
Comparative example 1
The detailed description is the same as example 1; except that in comparative example 1: the aggregate is acid granite, and the particle size of the acid granite is 9.5-13.2mm.
Comparative example 2
The detailed description is the same as example 1; except that in comparative example 2: the weight ratio of the acetone to the ethyl acetate is 1:1.
comparative example 3
The detailed description is the same as example 1; except that in comparative example 3: the surface rinse is methanol.
Comparative example 4
The detailed description is the same as example 1; except that in comparative example 4: the surface rinse is butyrolactam.
Comparative example 5
The detailed description is the same as example 1; except that in comparative example 5: the polyurethane is used in an amount of 3%.
Comparative example 6
The detailed description is the same as example 1; except that in comparative example 6: the spraying amount of the flushing agent is 0.1kg/m 2 。
Comparative example 7
The detailed description is the same as example 1; except that in comparative example 7: the soaking time of the flushing agent after spraying is 5min.
Comparative example 8
The detailed description is the same as example 1; except that in comparative example 8: the thickness of the polyurethane exposed stone pavement is 3cm.
Performance test method
Performance tests were performed in examples and comparative examples and the test data are listed in table 1.
1. Uniaxial penetration strength (high temperature performance): reference is made to JTG D50-2017.
2. Exposed stone depth: exposed height of aggregate after flushing.
3. Low temperature crack resistance: low Wen Xiaoliang bend test (JTG T0715).
4. Water loss resistance: freeze thawing cleavage test (JTG T0729).
5. Fatigue life: four-point bending fatigue test (JTG T0739).
6. Road friction coefficient BPN: reference is made to T0964.
7. Surface texture depth TD: reference is made to T0961.
Performance test data
TABLE 1
Claims (10)
1. The functional polyurethane exposed stone pavement is characterized by comprising the following components: cementing material, aggregate and surface flushing agent; the cement comprises polyurethane.
2. The functional polyurethane slab-stock pavement of claim 1 wherein the aggregate comprises at least one of granite, basalt, flow rock, and limestone.
3. The functional polyurethane aggregate pavement of claim 2, wherein the aggregate comprises a first aggregate and a second aggregate, the first aggregate having a particle size of 3-9.5mm, and the second aggregate having a particle size of 9.5-15mm.
4. A functional polyurethane exposed stone pavement according to claim 3, wherein the weight ratio of the first aggregate to the second aggregate is (2-4): (6-8).
5. The functional polyurethane masonry pavement according to claim 1 or 4, wherein the binder comprises 2.5-6 weight percent of aggregate.
6. The functional polyurethane masonry pavement according to claim 1 or 5, wherein the surface-flushing agent comprises at least one of methyl ethyl ketone, acetone, ethyl acetate, dimethylacetamide, butyl acetate.
7. The functional polyurethane exposed stone pavement according to claim 6, wherein the surface flushing agent comprises acetone and ethyl acetate, and the weight ratio of the acetone to the ethyl acetate is (13-15): (5-7).
8. A method for preparing the functional polyurethane exposed stone pavement according to claim 1, which is characterized by comprising the following steps:
s1, mixing cementing materials and aggregate, paving and rolling, and waiting for 3-5h for curing and forming;
s2, spraying a surface flushing agent on the surface of the solidified and formed product for soaking;
s3, cleaning by brushing to expose aggregate, and obtaining the modified asphalt.
9. The method for preparing a functional polyurethane dew stone pavement according to claim 8, wherein the spraying amount is 0.12-0.20kg/m 2 。
10. The method for preparing a functional polyurethane exposed stone pavement according to claim 9, wherein the soaking time is 5-20min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310688937.1A CN116750993A (en) | 2023-06-12 | 2023-06-12 | Functional polyurethane exposed stone pavement and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310688937.1A CN116750993A (en) | 2023-06-12 | 2023-06-12 | Functional polyurethane exposed stone pavement and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109761538A (en) * | 2019-01-30 | 2019-05-17 | 浙江广天构件股份有限公司 | A kind of dew aggregate concrete and its construction method |
| CN111187044A (en) * | 2020-03-21 | 2020-05-22 | 陕西隆生建材有限公司 | Exposed concrete and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109761538A (en) * | 2019-01-30 | 2019-05-17 | 浙江广天构件股份有限公司 | A kind of dew aggregate concrete and its construction method |
| CN111187044A (en) * | 2020-03-21 | 2020-05-22 | 陕西隆生建材有限公司 | Exposed concrete and construction method thereof |
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