CN219450307U - Steel fiber geopolymer concrete low-carbon pavement - Google Patents
Steel fiber geopolymer concrete low-carbon pavement Download PDFInfo
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- CN219450307U CN219450307U CN202320244621.9U CN202320244621U CN219450307U CN 219450307 U CN219450307 U CN 219450307U CN 202320244621 U CN202320244621 U CN 202320244621U CN 219450307 U CN219450307 U CN 219450307U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The utility model relates to a steel fiber geopolymer concrete low-carbon pavement which comprises a surface layer, wherein the surface layer comprises a water-based MMA anti-slip coating, a steel fiber geopolymer concrete layer is paved at the bottom of the water-based MMA anti-slip coating, a base layer is paved at the bottom of the surface layer, the base layer comprises a cement stabilized macadam base layer, a lime industrial waste residue semi-rigid base layer is paved at the bottom of the cement stabilized macadam base layer, and a cushion layer is paved at the bottom of the base layer; a geotextile layer is laid between the surface layer and the base layer. The utility model reduces carbon dioxide emission, accords with the double-carbon target, and has important significance for green low-carbon development of transportation industry; in addition, the surface layer, the base layer and the cushion layer are all from industrial waste residues, so that the comprehensive utilization of waste resources is realized; the anti-skid coating is adopted on the surface layer, so that the anti-seepage performance and anti-skid performance of the pavement are enhanced, and the durability of the pavement is effectively improved.
Description
Technical Field
The utility model relates to the technical field of pavement structures, in particular to a steel fiber geopolymer concrete low-carbon pavement.
Background
Due to the rapid development of industrialization and city, the yields of industrial chemical byproducts and wastes are increased year by year, wherein the chemical components of the industrial wastes are represented by fly ash produced by coal-fired power generation, coal slag produced by coal chemical synthetic ammonia, methanol and liquid fuel, and blast furnace slag produced by blast furnace ironmaking, and the chemical components are represented by SiO 2 、Al 2 O 3 Mainly, the cement has similar main components with certain volcanic ash activity. In the prior art, cement concrete pavement is easy to crack, and in the construction period, certain environmental pollution can be caused by higher carbon emission.
Geopolymer concrete is prepared by alkaline excitation of SiO in industrial waste 2 、Al 2 O 3 A green inorganic aluminosilicate novel gel material-geopolymer is formed. The geopolymer has the advantages of rich raw materials, low production energy consumption, environmental protection, better mechanical property and durability, and is a non-two choice alternative for replacing cement. The geopolymer is adopted to replace cement to prepare the concrete pavement, so that the cement consumption is reduced, the carbon dioxide emission is further reduced, and the double-carbon target is met.
Disclosure of Invention
The utility model aims to solve the defects of the prior art and provides a steel fiber geopolymer concrete low-carbon pavement.
The utility model adopts the following technical scheme to realize the aim: the steel fiber geopolymer concrete low-carbon pavement comprises a surface layer, wherein a base layer is paved at the bottom of the surface layer, and a cushion layer is paved at the bottom of the base layer; a geotextile layer is laid between the surface layer and the base layer.
Further, the surface layer comprises a water-based MMA anti-slip coating, and a steel fiber geopolymer concrete layer is paved at the bottom of the water-based MMA anti-slip coating.
Further, the base layer comprises a cement stabilized macadam base layer, and a lime industrial waste residue semi-rigid base layer is paved at the bottom of the cement stabilized macadam base layer.
Further, the thicknesses of the water-based MMA anti-slip coating, the steel fiber geopolymer concrete surface layer, the cement stabilized macadam base layer, the lime industrial waste residue semi-rigid base layer, the cushion layer and the geotextile layer are 1-2 mm, 14-16 cm, 8-10 cm, 15-20 cm, 10-12 cm and 1-3 mm in sequence.
Further, the aqueous MMA anti-slip coating has a curing time of more than 2 hours and a dry friction coefficient of not less than 0.65.
Further, the steel fibers filled in the steel fiber geopolymer concrete layer are wavy steel fibers, the compressive strength of the steel fiber geopolymer concrete layer is greater than 40.0MPa, and the flexural strength is greater than 4.5MPa.
Further, the cushion layer is a gas slag cushion layer.
Further, the lime industrial waste residue semi-rigid base layer is a coal residue lime road base layer, coal residues, soil and lime are mixed according to a certain proportion, water is added for mixing, rolling and forming are carried out, the coal residues are low-activity pozzolanic materials, and the coal residues are free of impurities through screening, loose and porous in particles, have coarse and fine particles and have a certain grading.
Furthermore, the unconfined compressive strength of the cement stabilized macadam base 7d reaches 5.0MPa.
Further, the geotextile layer has an elongation of greater than 50%.
The beneficial effects of the utility model are as follows: the utility model adopts the steel fiber geopolymer concrete surface layer to ensure the bearing capacity and durability of the road structure, further improves the crack resistance of the road surface, greatly reduces the cement consumption of the road surface, further reduces the carbon dioxide emission, accords with the double-carbon target, and has important significance for the green low-carbon development of the transportation industry; in addition, the surface layer, the base layer and the cushion layer are all from industrial waste residues, so that the comprehensive utilization of waste resources is realized; the anti-skid coating is adopted on the surface layer, so that the anti-seepage performance and anti-skid performance of the pavement are enhanced, and the durability of the pavement is effectively improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
in the figure: 10-surface layer; 11-an aqueous MMA anti-slip coating; 12-a steel fiber geopolymer concrete layer; 20-a base layer; 21-cement stabilized macadam foundation; 22-lime industrial waste residue semi-rigid base layer; 30-cushion layer; 40-geotextile layer;
the drawings in the present utility model are schematic, and their sizes do not represent actual dimensions;
the embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
Detailed Description
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1, the steel fiber geopolymer concrete low-carbon pavement comprises a surface layer 10, wherein the surface layer 10 comprises a water-based MMA anti-slip coating 11, a steel fiber geopolymer concrete layer 12 is paved at the bottom of the water-based MMA anti-slip coating 11, and steel fibers filled in the steel fiber geopolymer concrete layer 12 are wavy steel fibers; the bottom of the surface layer 10 is paved with a base layer 20, the base layer 20 comprises a cement stabilized macadam base layer 21, the bottom of the cement stabilized macadam base layer 21 is paved with a lime industrial waste residue semi-rigid base layer 22, the lime industrial waste residue semi-rigid base layer 22 is a cinder lime road base layer, cinder, soil and lime are mixed according to a certain proportion, water is added for mixing, rolling and forming are carried out, and cinder is a low-activity volcanic ash material; a cushion layer 30 is laid at the bottom of the base layer 20, and the cushion layer 30 is a gas slag cushion layer; a geotextile layer 40 is laid between the facing layer 10 and the base layer 20.
The thicknesses of the water-based MMA anti-slip coating 11, the steel fiber geopolymer concrete surface layer 12, the cement stabilized macadam base layer 21, the lime industrial waste residue semi-rigid base layer 22, the cushion layer 30 and the geotextile layer 40 are sequentially 1.5mm, 16cm, 10cm, 20cm, 10cm and 2mm.
Before the cushion layer 30 is paved, the surface of the soil roadbed should be checked, and the surface is cleaned up of floating soil, accumulated water and the like. The mat 30 is layered, compacted and leveled.
The lime industry slag semi-rigid substrate 22 is a cinder lime type road substrate, and cinder, soil and lime are mixed according to the following ratio of 48:40:12, adding water and mixing, wherein the optimal water content is 20%, the compaction coefficient is 1.5-1.8, and rolling and forming.
The cinder is a low-activity pozzolanic material, and the cinder is free of impurities, loose and porous in particles, coarse and fine in particles and has a certain grading, and the grading is shown in table 1.
Table 1 table of particle composition of coal cinder
The cement stabilized macadam base 21 is made of P.O32.5 retarder cement, the macadam grading is shown in Table 2, and the optimal water content is 4.0%.
Table 2 composition table of crushed stone particles in mixture
The geotextile layer 40 is made of polypropylene geotextile and has good heat resistance and impermeability, the extensibility is more than 50%, and the thickness is 2mm.
The compressive strength of the steel fiber geopolymer concrete layer 12 is more than 40MPa, and the flexural tensile strength is more than 4.5MPa. The mixing ratio of the steel fiber geopolymer concrete is that the molar concentration of sodium hydroxide is 14M/L and the molar concentration of fly ash is 225kg/M 3 95kg/m slag powder 3 75kg/m sodium hydroxide solution 3 114kg/m sodium silicate solution 3 1125kg/m coarse aggregate 3 787kg/m of fine aggregate 3 305kg/m steel fiber 3 . The steel fibers filled in the steel fiber geopolymer concrete layer 12 are wavy steel fibers, and the length is 35mm, the width is 2mm and the thickness is 0.8mm.
The slump of the steel fiber reinforced polymer concrete prepared in the above compounding ratio was 70mm and the 28d compressive strength was 52.5MPa.
The curing time of the aqueous MMA anti-slip coating 11 is more than 2 hours, the dry friction coefficient is not less than 0.65, and the aqueous MMA anti-slip coating has no pollution to the environment. The aqueous MMA non-slip coating 11 was spray-applied after 7 days of curing of the steel fiber geopolymer concrete.
According to the steel fiber geopolymer concrete low-carbon pavement structure, when the width of the double-lane pavement is 7m, compared with a common C40 cement concrete pavement, the consumption of cement is reduced by 1120kg, the industrial waste residue is treated by 1238kg, and the carbon dioxide emission is reduced by 648kg.
While the utility model has been described above with reference to the accompanying drawings, it will be apparent that the utility model is not limited to the above embodiments, but is intended to cover various modifications, either made by the method concepts and technical solutions of the utility model, or applied directly to other applications without modification, within the scope of the utility model.
Claims (2)
1. The steel fiber geopolymer concrete low-carbon pavement is characterized by comprising a surface layer (10), wherein a base layer (20) is paved at the bottom of the surface layer (10), and a cushion layer (30) is paved at the bottom of the base layer (20); a geotextile layer (40) is paved between the surface layer (10) and the base layer (20);
the surface layer (10) comprises a water-based MMA anti-slip coating (11), a steel fiber geopolymer concrete layer (12) is paved at the bottom of the water-based MMA anti-slip coating (11), and steel fibers filled in the steel fiber geopolymer concrete layer (12) are wavy steel fibers;
the base layer (20) comprises a cement stabilized macadam base layer (21), a lime industrial waste residue semi-rigid base layer (22) is paved at the bottom of the cement stabilized macadam base layer (21), and the lime industrial waste residue semi-rigid base layer (22) is a cinder lime road base layer;
the cushion layer (30) is a gas slag cushion layer.
2. The steel fiber reinforced polymer concrete low-carbon pavement according to claim 1, wherein the aqueous MMA anti-slip coating (11) has a curing time of more than 2 hours and a dry friction coefficient of not less than 0.65.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320244621.9U CN219450307U (en) | 2023-02-17 | 2023-02-17 | Steel fiber geopolymer concrete low-carbon pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320244621.9U CN219450307U (en) | 2023-02-17 | 2023-02-17 | Steel fiber geopolymer concrete low-carbon pavement |
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| Publication Number | Publication Date |
|---|---|
| CN219450307U true CN219450307U (en) | 2023-08-01 |
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| CN202320244621.9U Active CN219450307U (en) | 2023-02-17 | 2023-02-17 | Steel fiber geopolymer concrete low-carbon pavement |
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| CN (1) | CN219450307U (en) |
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2023
- 2023-02-17 CN CN202320244621.9U patent/CN219450307U/en active Active
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