CN113123187A - Waste concrete fist stone pavement base and preparation method thereof - Google Patents
Waste concrete fist stone pavement base and preparation method thereof Download PDFInfo
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- CN113123187A CN113123187A CN202110479530.9A CN202110479530A CN113123187A CN 113123187 A CN113123187 A CN 113123187A CN 202110479530 A CN202110479530 A CN 202110479530A CN 113123187 A CN113123187 A CN 113123187A
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- 239000004575 stone Substances 0.000 title claims abstract description 85
- 239000002699 waste material Substances 0.000 title claims abstract description 63
- 238000002360 preparation method Methods 0.000 title description 4
- 239000002245 particle Substances 0.000 claims abstract description 34
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000004568 cement Substances 0.000 claims description 15
- 238000013461 design Methods 0.000 claims description 7
- 238000005056 compaction Methods 0.000 claims description 6
- 239000010881 fly ash Substances 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 239000002956 ash Substances 0.000 claims description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 4
- 239000011707 mineral Substances 0.000 claims description 4
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims description 2
- 239000010440 gypsum Substances 0.000 claims description 2
- 229910052602 gypsum Inorganic materials 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000002893 slag Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 20
- 238000011049 filling Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000012856 weighed raw material Substances 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 208000034189 Sclerosis Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 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
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses a waste concrete fist stone pavement base course which is characterized by comprising a lock-embedded framework structure formed by stacking waste concrete fist stones and high-flow-state self-compacting fine stone concrete or mortar filled in stacking gaps of the lock-embedded framework structure; the waste concrete boxing stone is formed by crushing waste concrete, and the particle size of the waste concrete boxing stone is 30-100 mm. The method adopts waste concrete to construct a large-particle fist stone interlocking type pavement base; form the skeleton of interlocking each other between the fist stone, reduce the horizontal lapse and the creep of fist stone interlocking type road surface base course material, the fist stone skeleton has blockked that the crack adopts the aggregate of big particle diameter aggregate (fist stone) interlocking type in whole the route base course road surface of continuous transmission and development of basic unit can eliminate reflection crack thereby postpone water damage, can increase substantially road surface base course's bearing capacity and crack resistance.
Description
Technical Field
The invention belongs to the technical field of highway engineering, and particularly relates to a method for building a fist stone interlocking type pavement base by utilizing waste concrete.
Background
The service life of the highway in China is usually lower than the design life, which is related to the ubiquitous heavy load overload and the reflective crack induced after the base layer cracks and then the damage under the water damage effect. The aggregate with large particle size (fist stone) interlocking type can eliminate reflection cracks so as to delay water damage; the bearing capacity of the pavement base can be greatly improved, and the method is suitable for the current situation of heavy overload of roads in China.
On the other hand, the stacking of the waste concrete generated after the service period of the cement concrete pavement in China is finished occupies land, and the recycling comprehensive utilization of the waste concrete has important environmental and economic effects. Because the concrete has low rigidity and large crushing energy consumption, if the concrete is crushed to reach the required grain diameter of 4.95mm-31.5mm of the pavement base, the crushing work is extremely large, the consumption of cement for the prepared pavement base is also large, and the shrinkage of the prepared base is usually larger than that of the pavement base prepared from the primary aggregate.
The combination of the semi-rigid base layer and the asphalt pavement is taken as the most typical road structure in China, and has the characteristics of high overall strength, good stability, high rigidity, strong permanent deformation resistance and driving load fatigue failure resistance, adaptability to heavy traffic and the like, so the combination is most widely applied in China. However, in recent years, the problem of diseases of semi-rigid base asphalt pavements, particularly early diseases, has been widespread, and a large part of diseases of the type of road structures can be attributed to the inherent defect of easy shrinkage cracking. Because the reflection cracks induced by the base layer cracking provide a channel for water damage of the pavement, water is soaked into the base layer and the subbase layer of the pavement through the cracks and even enters the roadbed soil which is very sensitive to humidity, so that the soil foundation is softened, and the whole roadbed and pavement structure is endangered.
Disclosure of Invention
The invention mainly aims to solve the problems and the defects of the bearing capacity of the conventional road base layer, the resource utilization of waste concrete and the like, and provides a fist stone interlocking type road base layer constructed by utilizing the waste concrete, which has good bearing capacity and crack resistance; and the related preparation method is simple, convenient to operate and suitable for popularization and application.
In order to achieve the purpose, the invention adopts the technical scheme that:
a waste concrete fist stone pavement base course comprises a lock-embedded framework structure formed by stacking waste concrete fist stones and high-flow-state self-compaction fine stone concrete or mortar filled in stacking gaps of the lock-embedded framework structure; the waste concrete boxing stone is formed by crushing waste concrete, and the particle size of the waste concrete boxing stone is 30-100 mm.
In the scheme, the flattening porosity of the interlocking framework structure is 40-55%.
In the scheme, the particles smaller than 40mm in the waste concrete boxing stone are not more than 10%, and the particles larger than 80mm are not more than 5%.
Preferably, the mass percentage of each solid granule in the waste concrete boxing stone comprises: 20-25% of aggregate with the particle size of 30-53 mm, 70-75% of aggregate with the particle size of 53-80 mm and 0-5% of aggregate with the particle size of 80-100 mm.
In the scheme, the compressive strength of the waste concrete boxing stone is more than 30 MPa.
In the scheme, the slump expansion degree of the high-flow-state self-compaction fine-stone concrete or mortar is 450-1000 mm.
In the above scheme, the high flow state self-compacting fine aggregate concrete or mortar comprises the following components in parts by weight: 1000-1500 kg/m of fine aggregate2Cement 90-350 kg/m220-210 kg/m of mineral admixture2(ii) a The water-to-glue ratio is 0.5-1.7.
In the scheme, the particle size of the fine aggregate is less than 10 mm; machine-made sand (zone II, fineness modulus of 2.5-3.5) or fine stone and recycled fine aggregate produced in the process of preparing boxing stone by using waste concrete can be adopted.
In the scheme, the cement is P.O 42.5.5.
In the scheme, the mineral admixture is one or more of fly ash, desulfurized gypsum, stone powder, phosphogypsum, ash, desulfurized ash and the like.
The preparation method of the waste concrete fist stone pavement base comprises the following steps: firstly, simply crushing waste concrete into large-particle-size fist stones (30-100mm), stacking the single-graded waste concrete fist stones, paving and leveling by using a paver and a grader, wherein the elevation is 5-15mm higher than the design elevation, then filling high-flow-state self-compacting fine stone concrete or mortar into stacking gaps, vibrating and rolling by using a vibratory roller, and maintaining the stacked high-flow-state self-compacting fine stone concrete or mortar after finishing.
In the scheme, the falling height of the high-flow-state self-compaction fine stone concrete or mortar is not more than 200mm, and if the fine stone concrete with the slump expansion degree of less than 750mm is adopted, 10-20mm of surplus slurry is reserved on the surface after the fine stone concrete or mortar is poured.
In the scheme, after the self-compacting fine stone concrete or mortar is poured, a vibratory roller is adopted to vibrate and roll, and the rolling is carried out for 1-3 times according to the slump expansion degree of the poured slurry.
According to the scheme, after rolling is completed, according to the traffic condition, the road with dense overweight vehicles needs to be closed for traffic health maintenance, and the traffic health maintenance can be developed without overload freight vehicles passing.
According to the invention, waste concrete is used for building the fist stone interlocking type pavement base, and fist stones form interlocking frameworks to provide bearing capacity for the pavement base structure; high flow state filler (self-compaction pea gravel concrete or mortar) is filled in the fist stone space, plays stabilizing effect to the fist stone skeleton after the sclerosis, reduces the level of fist stone interlocking type road surface base material and passes and creep, and the route of continuous transmission and development in the whole of basic unit can effectively crack in the fist stone skeleton of formation, and then improves the inherent defect that traditional semi-rigid basic unit easily produced the fracture, can effectively compromise good mechanical properties and durability.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the waste concrete is adopted to build the fist stone interlocking type pavement base, so that the land occupied by piling the waste concrete is reduced, less crushing work is required for crushing the waste concrete into the fist stone, the energy consumption is reduced, and a direction is provided for the comprehensive utilization of the waste concrete generated after the service period of the cement concrete pavement is finished; form the skeleton of interlocking each other between the fist stone, reduce the horizontal lapse and the creep of fist stone interlocking type road surface base course material, the fist stone skeleton has blockked that the crack adopts the aggregate of big particle diameter aggregate (fist stone) interlocking type in whole the route base course road surface of continuous transmission and development of basic unit can eliminate reflection crack thereby postpone water damage, can increase substantially road surface base course's bearing capacity and crack resistance.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following examples, the waste concrete adopted is taken from a waste concrete pavement, and the compressive strength of the waste concrete pavement is higher than 30 MPa; the boxing stone is prepared by sorting and crushing waste concrete, the particle size of the boxing stone is 31.5-100mm, wherein particles smaller than 40mm are not more than 10 wt%, and particles larger than 80mm are not more than 5%.
In the following examples, P.O 42.5.5 was used as the cement.
Example 1
A waste concrete fist stone pavement base course is prepared by the following steps:
1) stacking 31.5-100mm (22 wt% of aggregate with the particle size of 30-53 mm, 75 wt% of aggregate with the particle size of 53-80 mm and 3 wt% of aggregate with the particle size of 80-100 mm) of the obtained crushed waste concrete in a 200mm x 200mm mould, and leveling by using a paver and a grader, wherein the elevation is 5-15mm higher than the design elevation; the flattening porosity of the obtained interlocking framework structure is 50 percent;
2) according to cement 341kg/m30kg/m of fly ash3157kg/m stone powder3Machine-made sand (zone II, fineness model)Number 2.8)1409kg/m3306kg/m of water3Weighing the raw materials according to the proportion; mixing and stirring the weighed raw materials for 2-3min, filling the obtained mortar (with slump expansion of 580mm) into a boxing stone stacking gap, and applying vibration by using a vibration table in the process until no bubbles emerge to obtain a concrete test piece.
Curing the concrete test block obtained in the step for 24 hours with a mould, then placing the concrete test block into a curing room for curing, and measuring the strength of the concrete test block in different ages after curing, wherein the 7d compressive strength is 7.8Mpa, and the 56d compressive strength is 15.9 Mpa; the 28d dry shrinkage is 0.190mm, and the 60d dry shrinkage is 0.210 mm.
Example 2
A waste concrete fist stone pavement base course is prepared by the following steps:
1) stacking 31.5-100mm (wherein, 22% aggregate with the particle size of 31.5-53 mm, 75% aggregate with the particle size of 53-80 mm and 3% aggregate with the particle size of 80-100 mm) waste concrete into a 200mm mould, and paving and leveling by adopting a paver and a grader, wherein the elevation is 5-15mm higher than the design elevation; the flattening porosity of the obtained interlocking framework structure is 50 percent;
2) according to the cement of 304kg/m334kg/m of fly ash3157kg/m stone powder3Machine-made sand (zone II, fineness modulus of 2.8)1409kg/m3304kg/m of water3Weighing the raw materials according to the proportion; mixing and stirring the weighed raw materials for 2-3min, filling the obtained mortar (with slump expansion of 600mm) into a boxing stone stacking gap, and applying vibration by using a vibration table in the process until no bubbles emerge to obtain a concrete test piece.
Curing the obtained concrete test block with a mold for 24 hours, then placing the concrete test block into a curing room for curing, and measuring the strength of the concrete test block at different ages after curing, wherein the 7d compressive strength is 6.4MPa, and the 56d compressive strength is 13.3 MPa; the 28d dry shrinkage is 0.185mm, and the 60d dry shrinkage is 0.205 mm.
Example 3
A waste concrete fist stone pavement base course is prepared by the following steps:
1) crushing 31.5-100mm waste concrete, wherein 22% of aggregate with the particle size of 31.5-53 mm, 75% of aggregate with the particle size of 53-80 mm and 3% of aggregate with the particle size of 80-100 mm) is stacked in a mould with the particle size of 200mm multiplied by 200mm, and paving and leveling by adopting a paver and a grader, wherein the elevation is 5-15mm higher than the design elevation; the flattening porosity of the obtained interlocking framework structure is 50 percent;
2) according to 267kg/m of cement367kg/m of fly ash3157kg/m stone powder3Machine-made sand (zone II, fineness modulus of 2.8)1409kg/m3301kg/m of water3Weighing the raw materials according to the proportion; mixing and stirring the weighed raw materials for 2-3min, filling the obtained mortar (with slump expansion of 610mm) into a boxing stone stacking gap, and applying vibration by using a vibration table in the process until no bubbles emerge, thereby obtaining a concrete test piece.
Curing the obtained concrete test block with a mold for 24 hours, then placing the concrete test block into a curing room for curing, and measuring the strength of the concrete test block at different ages after curing, wherein the 7d compressive strength is 4.6Mpa, and the 56d compressive strength is 10.4 Mpa; the 28d dry shrinkage is 0.183mm, and the 60d dry shrinkage is 0.201 mm.
Example 4
A waste concrete fist stone pavement base course is prepared by the following steps:
1) piling 31.5-100mm (wherein, 22% aggregate with the particle size of 31.5-53 mm, 75% aggregate with the particle size of 53-80 mm and 3% aggregate with the particle size of 80-100 mm) of crushed waste concrete into a 200mm x 200mm mould, paving and leveling by adopting a paver and a grader, and enabling the elevation to be 5-15mm higher than the design elevation; the flattening porosity of the obtained interlocking framework structure is 50 percent;
2) according to cement 300kg/m348kg/m of fly ash3147kg/m stone powder3Machine-made sand (zone II, fineness modulus of 2.8)1409kg/m3304kg/m of water3Weighing the raw materials according to the proportion; mixing and stirring the weighed raw materials for 2-3min, filling the obtained mortar (with the slump expansion degree of 590mm) into a boxing stone stacking gap, and applying vibration by using a vibration table in the process until no bubbles emerge, thereby obtaining a concrete test piece. .
Curing the obtained concrete test block with a mould for 24 hours under a drying condition, and measuring the strength of the concrete test block at different ages after curing, wherein the 7d compressive strength is 5.1Mpa, and the 56d compressive strength is 12.7 Mpa; the 28d dry shrinkage is 0.186mm, and the 60d dry shrinkage is 0.207 mm.
Comparative example
A conventional cement stabilized macadam pavement base is prepared by the following steps:
the cement stabilized macadam pavement base course is prepared by adopting the maximum grain diameter of 37.5mm, and the passing rate of each sieve adopting gradation is shown in Table 1
TABLE 1 passage of grading M37.5
According to a maximum dry density of 2.074g/cm3The optimum water content is 7.6 percent, the cement dosage is 4.5 percent, a hydrostatic forming method is adopted to prepare a test piece with the compression strength of phi 15cm multiplied by h15cm according to the compaction degree of 98 percent, a dry-shrinkage test piece with the thickness of 100mm multiplied by 400mm is measured, and the test is carried out by standard maintenance until the test age.
Tests show that the 7d compressive strength of the cement stabilized macadam pavement base is 4.34Mpa, the 56d compressive strength is 8.36Mpa, the 28d dry shrinkage is 0.215mm, and the 60d dry shrinkage is 0.235 mm.
The results show that the waste concrete fist stone pavement base course can effectively overcome the inherent defect that the traditional semi-rigid base course is easy to crack, and is beneficial to further improving the mechanical property and durability.
It is apparent that the above embodiments are only examples for clearly illustrating and do not limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are therefore intended to be included within the scope of the invention as claimed.
Claims (9)
1. A waste concrete fist stone pavement base course is characterized by comprising a lock-embedded framework structure formed by stacking waste concrete fist stones and high-flow-state self-compacting fine stone concrete or mortar filled in stacking gaps of the lock-embedded framework structure; the waste concrete boxing stone is formed by crushing waste concrete, and the particle size of the waste concrete boxing stone is 30-100 mm.
2. A waste concrete fist pavement base according to claim 1 wherein the lock frame structure has a leveling porosity of 40-55%.
3. The waste concrete fist stone road base layer as claimed in claim 1, wherein the waste concrete fist stone is made by sorting and crushing waste concrete; wherein the granules smaller than 40mm are not more than 10%, and the granules larger than 80mm are not more than 5%.
4. The waste concrete fist stone road base layer as claimed in claim 1, wherein the mass percentage of each solid particle material in the waste concrete fist stone comprises: 20-25% of granules with the particle size of 30-53 mm, 70-75% of granules with the particle size of 53-80 mm and 0-5% of granules with the particle size of 80-100 mm.
5. A waste concrete fist-stone road base as claimed in claim 1 wherein the slump expansion of the high flow self-compacting fine stone concrete or mortar is 450-.
6. A waste concrete fist pavement base according to claim 1 wherein the components and amounts thereof in the high flow self-compacting fine stone concrete or mortar comprise: 1000-1500 kg/m of fine aggregate2Cement 90-350 kg/m220-210 kg/m of mineral admixture2(ii) a The water-to-glue ratio is 0.5-1.7.
7. A waste concrete fist pavement base according to claim 1 wherein the fine aggregate has a particle size of less than 10 mm; fine stones generated in the process of preparing the fist stones by adopting machine-made sand or waste concrete; the mineral admixture is one or more of fly ash, desulfurized gypsum, stone powder, phosphogypsum, ash slag, desulfurized ash and the like.
8. The method for preparing a waste concrete fist stone pavement base as claimed in any one of claims 1 to 7, which comprises the steps of: firstly, waste concrete is adopted to simply crush the waste concrete into large-particle-size fist stones, the obtained single-graded large-particle-size waste concrete fist stones are stacked, a paver and a grader are adopted to pave and level the large-particle-size waste concrete fist stones, the elevation is 5-15mm higher than the design elevation, then high-flow-state self-compaction fine stone concrete or mortar is filled into the stacking gap, a vibratory roller is adopted to vibrate and roll the stacked fist stones, and the stacked fist stones are maintained after the completion.
9. The method according to claim 8, wherein the high flow self-compacting fine aggregate concrete or mortar has a drop height of 200mm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110479530.9A CN113123187A (en) | 2021-04-30 | 2021-04-30 | Waste concrete fist stone pavement base and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110479530.9A CN113123187A (en) | 2021-04-30 | 2021-04-30 | Waste concrete fist stone pavement base and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113718579A (en) * | 2021-07-30 | 2021-11-30 | 中铁十九局集团有限公司 | Environment-friendly ground construction method |
| CN116283118A (en) * | 2022-12-01 | 2023-06-23 | 武汉工程大学 | Pavement base material based on organic-inorganic cementing material synergistic stabilization phosphogypsum and recycled aggregate and preparation method thereof |
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| CN107540282A (en) * | 2017-07-03 | 2018-01-05 | 东莞理工学院 | A kind of cement stabilized grading crushed stones and its construction method using concrete debris |
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| CN104099845A (en) * | 2014-06-30 | 2014-10-15 | 中国石油集团川庆钻探工程有限公司 | Highway pavement structure taking building rubbish as aggregate |
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Application publication date: 20210716 |