CN117886561A - Crushed stone and fly ash mixed pavement paving material, preparation method and construction process - Google Patents
Crushed stone and fly ash mixed pavement paving material, preparation method and construction process Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 118
- 239000010881 fly ash Substances 0.000 title claims abstract description 95
- 239000004575 stone Substances 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 title claims description 21
- 238000002360 preparation method Methods 0.000 title abstract description 17
- 239000004576 sand Substances 0.000 claims abstract description 82
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 235000019738 Limestone Nutrition 0.000 claims abstract description 26
- 239000006028 limestone Substances 0.000 claims abstract description 26
- 238000002156 mixing Methods 0.000 claims abstract description 22
- 230000001186 cumulative effect Effects 0.000 claims abstract description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 3
- 238000005096 rolling process Methods 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000002956 ash Substances 0.000 claims description 9
- 239000003245 coal Substances 0.000 claims description 9
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 239000003546 flue gas Substances 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000004064 recycling Methods 0.000 abstract description 4
- 239000010908 plant waste Substances 0.000 abstract description 3
- 239000010883 coal ash Substances 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 73
- 229910052681 coesite Inorganic materials 0.000 description 7
- 229910052906 cristobalite Inorganic materials 0.000 description 7
- 239000000377 silicon dioxide Substances 0.000 description 7
- 229910052682 stishovite Inorganic materials 0.000 description 7
- 229910052905 tridymite Inorganic materials 0.000 description 7
- 241000269793 Cryothenia peninsulae Species 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000002791 soaking Methods 0.000 description 4
- 239000010426 asphalt Substances 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Abstract
The invention relates to a crushed stone fly ash mixed pavement paving material, a preparation method and a applying process, wherein the material is a composition formed by mixing the following raw material components in parts by mass: 15-35 parts of fly ash, 25-65 parts of machine-made sand, 10-30 parts of limestone mountain sand or/and river sand and 5-20 parts of water, wherein the fly ash is grade II fly ash in GB/T1596-2017 specification, the sum of SiO 2、Al2O3 and CaO content is more than 70%, the grain size of the machine-made sand is 5-30 mm, and the cumulative screen residue of a square hole sieve is 10mm 40-50%; the grain size of the limestone mountain sand is 1mm-10mm, and the cumulative screen residue of the square hole sieve is 5mm 50-60%. The machine-made sand and limestone mountain sand are mixed during preparation, then the machine-made sand and limestone mountain sand are mixed with fly ash, finally water is mixed, the material is prepared for use at present, the roadbed is flattened, and the material is paved, compacted, flattened and sprinkled, so that the vehicle can be used. The coal-fired power plant waste material recycling method takes the coal ash as one of the main materials, realizes full resource recycling of the coal-fired power plant waste material, has easily available raw materials, low cost and easy implementation, and is convenient for popularization and application of the strip mine.
Description
Technical Field
The invention belongs to the technical field of road materials, and particularly relates to a crushed stone and fly ash mixed pavement paving material, a preparation method and a construction process.
Background
In the road engineering of the strip mine, a mud-bonded broken stone road is commonly adopted as a mine transportation road, which is a road surface formed by the interlocking of broken stone and the bonding effect of clay, and is generally formed by rolling and compacting broken stone and cohesive soil with higher plasticity index in a certain proportion. However, the traditional road surface structure is formed by mixing stones and clay during paving, poor flatness and high dust emission are easy to occur during use, the problems of abrasion, loosening, falling off of wearing layers, exposed bones and the like are easy to occur under the influence of driving and natural factors, the maintenance workload is high, and especially in the regions where rainfall is frequent in the south of China, the road surface structure contains a large amount of clay, has poor water stability, is easy to crack after rainfall, has poor road surface stability, and is easy to cause problems of road surface slurry, subsidence and the like.
While concrete roads and asphalt roads with better road quality are applied to surface mines, the concrete roads and asphalt roads are not suitable for large-area use in the surface mines due to high manufacturing cost, long construction period and the like.
Disclosure of Invention
The application provides a broken stone fly ash mixed pavement paving material, a preparation method and a corresponding construction process thereof, and aims to overcome the defects of poor stability, poor flatness, high dust emission, easiness in abrasion and the like of a road surface of a mud-formed broken stone road in strip mine road engineering, and the defects of high construction cost, long construction period and the like of a concrete road and an asphalt road.
The purpose of the invention is realized by the following means:
the crushed stone and fly ash mixed pavement paving material is characterized by comprising the following raw material components in parts by mass:
15-35 parts of fly ash, 25-65 parts of machine-made sand, 10-30 parts of limestone mountain sand or/and river sand and 5-20 parts of water.
The fly ash is fine ash collected from flue gas after coal combustion, and is class II fly ash in GB/T1596-2017 specification, wherein the sum of SiO 2、Al2O3 and CaO content is more than 70%, and the screen residue fineness is less than 20% according to a 45 μm square hole screen.
The grain diameter of the machine-made sand is 5mm-30mm, and 10 mm-50% of the accumulated screen residue is calculated according to a square hole screen; the stone powder content (quoted by the term in GB/T14684-2022 building sand, the particle content of the material with the particle size smaller than 75 μm) is less than 5%, and the apparent density is more than or equal to 2550kg/m 3;
The grain diameter of the limestone mountain sand is 1mm-10mm, and 5mm 50-60% of the accumulated screen residue is calculated according to a square hole screen; the stone powder content (refer to the term in GB/T14684-2022 construction sand, the particle content of the material with the particle size smaller than 75 μm) is less than 15 percent.
Further, the grain diameter of the river sand is 0.15-5mm, and the cumulative screen residue of the river sand is 0.6mm85-71% according to a square hole screen; the mud content (refer to the term in GB/T14684-2022 construction sand, the particle content of the material with the particle size smaller than 75 μm) is less than 5%. The river sand and the limestone mountain sand can be mixed in any proportion.
The preparation method of the crushed stone and fly ash mixed pavement paving material is characterized by comprising the following steps of:
(1) Mixing the machine-made sand and limestone mountain sand, wherein the weight ratio of the machine-made sand to the limestone mountain sand or/and river sand is 1:0.15-1.2;
(2) Mixing the material obtained in the step (1) with the fly ash, wherein the total weight ratio of the material obtained in the step (1) to the fly ash is 1:0.15-1.0;
(3) And (3) adding water with the weight of 0.03-0.4 times of the weight of the material obtained in the step (2) into the material for mixing to obtain the crushed stone fly ash mixed pavement paving material.
The water in the step (1) is mixed in during paving.
The water of the pavement material is mixed with other raw materials, preferably, the mixture is prepared and used at present, and the mixture is mixed in advance and used within 24 hours. Otherwise, the method cannot be used.
The construction process for paving the crushed stone and fly ash mixed pavement paving material comprises the following steps of:
(1) Leveling the paved road subgrade, and removing accumulated water;
(2) Uniformly paving the crushed stone fly ash mixed pavement paving material to the pavement treated in the step (1), wherein the paving thickness is 40-50cm;
(3) And (3) repeatedly vibrating and rolling the pavement material in the step (2) by adopting a steel wheel type road roller, and rolling for a plurality of times until the pavement material is compacted. The number of times of rolling is generally more than 4.
(4) And (3) sprinkling water on the compacted pavement in the step (3) by adopting a sprinkling truck or other modes, wherein the compacted pavement is required to be totally wet but water flow can not be formed on the surface, and the pavement can be communicated after sprinkling water is completed.
The invention has the following technical effects:
The coal ash is used as one of the main raw materials, so that the full recycling of waste of the coal-fired power plant is realized, the resource waste is avoided, and the coal-fired power plant waste recycling method has important environmental protection significance.
The raw materials adopted by the invention are easy to obtain, the material cost is low, the material grading and preparation method are simple, the implementation is easy, and the method is beneficial to popularization and application in strip mines.
The crushed stone and fly ash mixed pavement paving material has the remarkable advantages of excellent mechanical property, higher pavement stability, good flatness and small dust emission, and overcomes the defect of insufficient performance of the mine pavement paving material in the prior art.
The preparation and paving process of the crushed stone and fly ash mixed pavement paving material has the advantages of short construction period, quick traffic time after construction, small influence on mine production, capability of better replacing materials such as the muddy stone, concrete and the like for mine pavement, and extremely high popularization and application values.
Detailed Description
The following detailed description of various exemplary embodiments of the invention is not to be taken as limiting the invention, but is to be understood as a more detailed description of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In addition, for numerical ranges in this disclosure, it is understood that each intermediate value between the upper and lower limits of the ranges is also specifically disclosed. Every smaller range between any stated value or stated range, and any other stated value or intermediate value within the stated range, is also encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included in the ranges.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the invention described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from consideration of the specification of the present invention. The specification and examples of the present invention are exemplary only.
The "parts" in the present invention are all parts by mass unless otherwise specified. The mass parts and the weight parts are synonymous.
The invention is illustrated in detail below with reference to examples:
Example 1
The crushed stone fly ash mixed pavement paving material comprises the following components in parts by mass:
21 parts of fly ash, 55 parts of machine-made sand, 14 parts of river sand and 10 parts of water;
Wherein, the fly ash is fine ash collected from flue gas of a thermal power plant with a foundation pit opening after coal combustion, wherein the sum of CaO, al 2O3、SiO2 and content is 85.11 percent, the loss on ignition is 1.98 percent, and the fineness of screen residue is less than 20 percent according to a square hole screen with 45 mu m. The grain diameter of the machine-made sand is 5mm-30mm, the grain diameter is 10 mm-50% according to the accumulated screen residue of the square hole sieve, the stone powder content is 5%, and the apparent density is 2550kg/m 3. The grain diameter of river sand is 0.15-5mm, and the cumulative screen residue is 0.6mm85-71% according to a square hole screen; the mud content is less than 5%.
The preparation method of the crushed stone fly ash mixed pavement paving material comprises the following steps:
(1) Uniformly mixing machine-made sand and river sand;
(2) Mixing the material obtained in the step (1) with fly ash;
(3) And (3) adding water into the material obtained in the step (2) for 2-3 times to mix, thereby obtaining the crushed stone fly ash mixed pavement paving material.
The construction process for paving the crushed stone and fly ash mixed pavement material comprises the following steps:
(1) Leveling the road bed of the paved road, and removing accumulated water;
(2) Uniformly paving the crushed stone fly ash mixed pavement paving material to the pavement treated in the step (1), wherein the paving thickness is 40-50cm;
(3) Repeatedly vibrating and rolling the pavement material in the step (2) by using a steel wheel type road roller, wherein the rolling times are 5 times;
(4) And (3) sprinkling water on the road surface compacted in the step (3) by using a sprinkling truck, and then, turning on the road after sprinkling water.
Example 2
The crushed stone fly ash mixed pavement paving material comprises the following components in parts by mass:
20 parts of fly ash, 58 parts of machine-made sand, 15 parts of river sand and 7 parts of water;
wherein, the fly ash is fine ash collected from flue gas of a pithead thermal power plant after coal combustion, wherein the sum of CaO, al 2O3、SiO2 and content is 85.11 percent, the loss on ignition is 1.98 percent, and the fineness of screen residue is less than 20 percent according to a 45 mu m square hole screen. The grain diameter of the machine-made sand is 5mm-30mm, the grain diameter is 10 mm-50% according to the accumulated screen residue of the square hole sieve, the stone powder content is 5%, and the apparent density is 2550kg/m 3. The grain diameter of river sand is 0.15-5mm, and the cumulative screen residue is 0.6mm85-71% according to a square hole screen; the mud content is less than 5%. .
The preparation method of the crushed stone fly ash mixed pavement paving material comprises the following steps:
(1) Uniformly mixing machine-made sand and river sand;
(2) Mixing the material obtained in the step (1) with fly ash;
(3) And (3) adding water into the material obtained in the step (2) for 2-3 times to mix, thereby obtaining the crushed stone fly ash mixed pavement paving material.
The construction process for paving the crushed stone and fly ash mixed pavement material comprises the following steps:
(1) Leveling the road bed of the paved road, and removing accumulated water;
(2) Uniformly paving the crushed stone fly ash mixed pavement paving material to the pavement treated in the step (1), wherein the paving thickness is 40-50cm;
(3) Repeatedly vibrating and rolling the pavement material in the step (2) by using a steel wheel type road roller, wherein the rolling times are 5 times;
(4) And (3) sprinkling water on the road surface compacted in the step (3) by using a sprinkling truck, and then, turning on the road after sprinkling water.
Example 3
The crushed stone fly ash mixed pavement paving material comprises the following components in parts by mass:
24 parts of fly ash, 55 parts of machine-made sand, 14 parts of limestone mountain sand and 7 parts of water;
Wherein, the fly ash is fine ash collected from flue gas of a pithead thermal power plant after coal combustion, wherein the sum of CaO, al 2O3、SiO2 and content is 85.11 percent, the loss on ignition is 1.98 percent, and the fineness of screen residue is less than 20 percent according to a 45 mu m square hole screen. The grain diameter of the machine-made sand is 5mm-30mm, the grain diameter is 10 mm-50% according to the accumulated screen residue of the square hole sieve, the stone powder content is 5%, and the apparent density is 2550kg/m 3. The grain size of the limestone mountain sand is 1mm-10mm, the cumulative screen residue is 5mm60% and the stone powder content is 4.5%.
The preparation method of the crushed stone fly ash mixed pavement paving material comprises the following steps:
(1) Uniformly mixing machine-made sand and limestone mountain sand;
(2) Mixing the material obtained in the step (1) with fly ash;
(3) And (3) adding water into the material obtained in the step (2) for 2-3 times to mix, thereby obtaining the crushed stone fly ash mixed pavement paving material.
The construction process for paving the crushed stone and fly ash mixed pavement material comprises the following steps:
(1) Leveling the road bed of the paved road, and removing accumulated water;
(2) Uniformly paving the crushed stone fly ash mixed pavement paving material to the pavement treated in the step (1), wherein the paving thickness is 40-50cm;
(3) Repeatedly vibrating and rolling the pavement material in the step (2) by using a steel wheel type road roller, wherein the rolling times are 5 times;
(4) And (3) sprinkling water on the road surface compacted in the step (3) by using a sprinkling truck, and then, turning on the road after sprinkling water.
Example 4
The crushed stone fly ash mixed pavement paving material comprises the following components in parts by mass:
15 parts of fly ash, 25 parts of machine-made sand, 10 parts of limestone mountain sand and 5 parts of water;
Wherein, the fly ash is fine ash collected from flue gas of a pithead thermal power plant after coal combustion, wherein the sum of CaO, al 2O3、SiO2 and content is 85.11 percent, the loss on ignition is 1.98 percent, and the fineness of screen residue is less than 20 percent according to a 45 mu m square hole screen. The grain diameter of the machine-made sand is 5mm-30mm, the grain diameter is 10 mm-50% according to the accumulated screen residue of the square hole sieve, the stone powder content is 5%, and the apparent density is 2550kg/m 3. The grain size of the limestone mountain sand is 1mm-10mm, the cumulative screen residue is 5mm60% and the stone powder content is 4.5%.
The preparation method of the crushed stone fly ash mixed pavement paving material comprises the following steps:
(1) Uniformly mixing machine-made sand and limestone mountain sand;
(2) Mixing the material obtained in the step (1) with fly ash;
(3) And (3) adding water into the material obtained in the step (2) for 2-3 times to mix, thereby obtaining the crushed stone fly ash mixed pavement paving material.
The construction process for paving the crushed stone and fly ash mixed pavement material comprises the following steps:
(1) Leveling the road bed of the paved road, and removing accumulated water;
(2) Uniformly paving the crushed stone fly ash mixed pavement paving material to the pavement treated in the step (1), wherein the paving thickness is 40-50cm;
(3) Repeatedly vibrating and rolling the pavement material in the step (2) by using a steel wheel type road roller, wherein the rolling times are 5 times;
(4) And (3) sprinkling water on the road surface compacted in the step (3) by using a sprinkling truck, and then, turning on the road after sprinkling water.
Example 5
The crushed stone fly ash mixed pavement paving material comprises the following components in parts by mass:
35 parts of fly ash, 65 parts of machine-made sand, 30 parts of river sand and 20 parts of water;
wherein, the fly ash is fine ash collected from flue gas of a pithead thermal power plant after coal combustion, wherein the sum of CaO, al 2O3、SiO2 and content is 85.11 percent, the loss on ignition is 1.98 percent, and the fineness of screen residue is less than 20 percent according to a 45 mu m square hole screen. The grain diameter of the machine-made sand is 5mm-30mm, the grain diameter is 10 mm-50% according to the accumulated screen residue of the square hole sieve, the stone powder content is 5%, and the apparent density is 2550kg/m 3. The grain diameter of river sand is 0.15-5mm, and the cumulative screen residue is 0.6mm85-71% according to a square hole screen; the mud content is less than 5%. .
The preparation method of the crushed stone fly ash mixed pavement paving material comprises the following steps:
(1) Uniformly mixing machine-made sand and river sand;
(2) Mixing the material obtained in the step (1) with fly ash;
(3) And (3) adding water into the material obtained in the step (2) for 2-3 times to mix, thereby obtaining the crushed stone fly ash mixed pavement paving material.
The construction process for paving the crushed stone and fly ash mixed pavement material comprises the following steps:
(1) Leveling the road bed of the paved road, and removing accumulated water;
(2) Uniformly paving the crushed stone fly ash mixed pavement paving material to the pavement treated in the step (1), wherein the paving thickness is 40-50cm;
(3) Repeatedly vibrating and rolling the pavement material in the step (2) by using a steel wheel type road roller, wherein the rolling times are 5 times;
(4) And (3) sprinkling water on the road surface compacted in the step (3) by using a sprinkling truck, and then, turning on the road after sprinkling water.
Example 6
The test pattern of the embodiment carries out a soaking test to simulate the long-term soaking road surface operation condition so as to further examine the technical effect of the invention.
The crushed stone fly ash mixed pavement paving material comprises the following components in parts by mass:
24 parts of fly ash, 54 parts of machine-made sand, 14 parts of limestone mountain sand and 8 parts of water;
Wherein, the fly ash is fine ash collected from flue gas of a pithead thermal power plant after coal combustion, wherein the sum of CaO, al 2O3、SiO2 and content is 85.11 percent, the loss on ignition is 1.98 percent, and the fineness of screen residue is less than 20 percent according to a 45 mu m square hole screen. The grain diameter of the machine-made sand is 5mm-30mm, the grain diameter is 10 mm-50% according to the accumulated screen residue of the square hole sieve, the stone powder content is 5%, and the apparent density is 2550kg/m 3. The grain size of the limestone mountain sand is 1mm-10mm, the cumulative screen residue is 5mm60% and the stone powder content is 4.5%.
The preparation method of the crushed stone fly ash mixed pavement paving material comprises the following steps:
(1) Uniformly mixing machine-made sand and limestone mountain sand;
(2) Mixing the material obtained in the step (1) with fly ash;
(3) And (3) adding water into the material obtained in the step (2) for 2-3 times to mix, thereby obtaining the crushed stone fly ash mixed pavement paving material.
The construction process for paving the crushed stone and fly ash mixed pavement material comprises the following steps:
(1) Leveling the road bed of the paved road, and removing accumulated water;
(2) Uniformly paving the crushed stone fly ash mixed pavement paving material to the pavement treated in the step (1), wherein the paving thickness is 40-50cm;
(3) Repeatedly vibrating and rolling the pavement material in the step (2) by using a steel wheel type road roller, wherein the rolling times are 5 times;
(4) And (3) sprinkling water on the road surface compacted in the step (3) by using a sprinkling truck, and then, turning on the road after sprinkling water.
Example 7
The test pattern of the embodiment carries out a soaking test to simulate the long-term soaking road surface operation condition so as to further examine the technical effect of the invention.
The crushed stone fly ash mixed pavement paving material comprises the following components in parts by mass:
30 parts of fly ash, 51 parts of machine-made sand, 13 parts of limestone mountain sand and 6 parts of water;
Wherein, the fly ash is fine ash collected from flue gas of a pithead thermal power plant after coal combustion, wherein the sum of CaO, al 2O3、SiO2 and content is 85.11 percent, the loss on ignition is 1.98 percent, and the fineness of screen residue is less than 20 percent according to a 45 mu m square hole screen. The grain diameter of the machine-made sand is 5mm-30mm, the grain diameter is 10 mm-50% according to the accumulated screen residue of the square hole sieve, the stone powder content is 5%, and the apparent density is 2550kg/m 3. The grain size of the limestone mountain sand is 1mm-10mm, the cumulative screen residue is 5mm60% and the stone powder content is 4.5%.
The preparation method of the crushed stone fly ash mixed pavement paving material comprises the following steps:
(1) Uniformly mixing machine-made sand and limestone mountain sand;
(2) Mixing the material obtained in the step (1) with fly ash;
(3) And (3) adding water into the material obtained in the step (2) for 2-3 times to mix, thereby obtaining the crushed stone fly ash mixed pavement paving material.
The construction process for paving the crushed stone and fly ash mixed pavement material comprises the following steps:
(1) Leveling the road bed of the paved road, and removing accumulated water;
(2) Uniformly paving the crushed stone fly ash mixed pavement paving material to the pavement treated in the step (1), wherein the paving thickness is 40-50cm;
(3) Repeatedly vibrating and rolling the pavement material in the step (2) by using a steel wheel type road roller, wherein the rolling times are 5 times;
(4) And (3) sprinkling water on the road surface compacted in the step (3) by using a sprinkling truck, and then, turning on the road after sprinkling water.
Effect verification
The data (data sources "concrete structure design Specification GB 50010-2010) for comparing the mechanical parameters of the crushed stone fly ash mixed pavement paving material and the existing C30 concrete material part are as follows:
table 1 comparative table of the material mechanical parameters of the examples of the present invention and concrete pavement
| Bulk weight/kg/m 3 | Compressive Strength/MPa | Elastic modulus/N/mm 2 | |
| Example 1 | 2378 | 55.06 | 68500 |
| Example 2 | 2132 | 57.15 | 66200 |
| Example 3 | 2386 | 53.14 | 64800 |
| Example 4 | 1745 | 38.83 | 62300 |
| Example 5 | 2397 | 36.26 | 57800 |
| Example 6 | 2658 | 32.98 | 52200 |
| Example 7 | 2604 | 31.15 | 56200 |
| C30 concrete | 2350 | 20.10 | 30000 |
See table 1 for: the test data of compressive strength and elastic modulus are superior to the standard of C30 concrete materials in the concrete structure design Specification under the condition that the volume weight is similar in the normal embodiment and the immersed embodiment.
From the results, the pavement material provided by the invention has good mechanical properties and bearing capacity, meanwhile, the raw material related by the invention is fly ash, the cost is low, the environment is protected, the solid waste is fully developed, meanwhile, the preparation method is simple, the process is easy to operate and implement, and the pavement material can better replace materials such as the sintered stone, the concrete and the like to be used for mine pavement, so that the pavement material has extremely high popularization and application values.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (9)
1. The crushed stone and fly ash mixed pavement paving material is characterized by comprising the following raw material components in parts by mass:
15-35 parts of fly ash, 25-65 parts of machine-made sand, 10-30 parts of limestone mountain sand or/and river sand and 5-20 parts of water.
2. The crushed stone fly ash mixed paving material according to claim 1, wherein the fly ash is fine ash collected from flue gas after coal combustion, and is class II fly ash in GB/T1596-2017 specification, wherein the sum of SiO 2、Al2O3 and CaO content is more than 70 percent, and the screen residue fineness is less than 20 percent according to a45 μm square hole screen;
the grain diameter of the machine-made sand is 5mm-30mm, and 10mm 40-50% of the accumulated screen residue is calculated according to a square hole screen; the stone powder content is less than 5 percent, and the apparent density is more than or equal to 2550kg/m 3;
the grain diameter of the limestone mountain sand is 1mm-10mm, and 5mm 50-60% is calculated according to the accumulated screen residue of the square hole screen; the stone powder content is less than 15 percent.
3. The crushed stone fly ash mixed paving material according to claim 1, wherein the grain size of river sand is 0.15-5mm, and the cumulative screen residue is 0.6mm85-71% according to a square hole sieve; the mud content is less than 5%.
4. The crushed stone fly ash mixed paving material according to claim 2, wherein the river sand and the limestone mountain sand are mixed in any proportion.
5. The method for preparing the crushed stone fly ash mixed pavement paving material according to claim 1, which is characterized by comprising the following steps:
(1) Mixing the machine-made sand with limestone mountain sand or/and river sand, wherein the weight ratio of the machine-made sand to the limestone mountain sand or/and river sand is 1:0.15-1.2;
(2) Mixing the material obtained in the step (1) with the fly ash, wherein the weight ratio of the material obtained in the step (1) to the total weight of the fly ash is 1:0.15-1.0;
(3) And (3) adding water with the weight of 0.03-0.4 times of the weight of the material obtained in the step (2) into the material for mixing to obtain the crushed stone fly ash mixed pavement paving material.
6. The method for preparing the crushed stone fly ash mixed paving material according to claim 5, wherein the water in the step (3) is mixed during paving.
7. The method for preparing the crushed stone fly ash mixed pavement material according to claim 5, wherein the water of the pavement material is mixed with other raw materials, and the mixture is ready for use and is mixed in advance and used within 24 hours.
8. The construction process for paving the crushed stone fly ash mixed pavement paving material according to claim 1, which is characterized by comprising the following steps:
(1) Leveling the paved road subgrade, and removing accumulated water;
(2) Uniformly paving the crushed stone fly ash mixed pavement paving material to the pavement treated in the step (1), wherein the paving thickness is 40-50cm;
(3) Repeatedly vibrating and rolling the pavement material in the step (2) by adopting a steel wheel type road roller, and rolling for a plurality of times until the pavement material is compacted;
(4) And (3) sprinkling water on the compacted pavement in the step (3) by adopting a sprinkling truck or other modes, wherein the compacted pavement is required to be totally wet but water flow can not be formed on the surface, and the pavement can be communicated after sprinkling water is completed.
9. The construction process for paving the crushed stone fly ash mixed pavement paving material according to claim 8, wherein the number of times of rolling in the step (3) is more than 4.
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| CN202410086452.XA CN117886561A (en) | 2024-01-22 | 2024-01-22 | Crushed stone and fly ash mixed pavement paving material, preparation method and construction process |
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| CN202410086452.XA CN117886561A (en) | 2024-01-22 | 2024-01-22 | Crushed stone and fly ash mixed pavement paving material, preparation method and construction process |
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