CN111648192A - Impact-resistant wear-resistant environment-friendly pavement and construction method - Google Patents
Impact-resistant wear-resistant environment-friendly pavement and construction method Download PDFInfo
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- CN111648192A CN111648192A CN202010545645.9A CN202010545645A CN111648192A CN 111648192 A CN111648192 A CN 111648192A CN 202010545645 A CN202010545645 A CN 202010545645A CN 111648192 A CN111648192 A CN 111648192A
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- 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
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
- E01C7/34—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ made of several courses which are not bound to each other ; Separating means therefor, e.g. sliding layers
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Abstract
The utility model provides a wear-resisting environment-friendly road surface of shock-resistant, includes surface course (1), basic unit (2), soil cloth layer (3) and way base (4), its characterized in that: surface course (1) is equipped with wearing layer (11) and grit level slag layer (12), wearing layer (11) is the ultra high performance concrete for doping glass powder and rice husk ash, grit level slag layer (12) inside is made by materials such as grit level waste steel slag, epoxy and pitch, basic unit (2) are equipped with high modulus epoxy asphalt slag layer (21) and construction recovery layer (22), construction recovery layer (22) are equipped with stone bits filler (23), geotextile layer (3) are located construction recovery layer (22) below, on roadbed (4), firm in connection. The pavement can bear vertical, horizontal and vibration impact loads, and is high in firmness, durability, comfort, flexibility and high temperature resistance.
Description
Technical Field
The invention relates to the technical field of airports, in particular to an impact-resistant wear-resistant environment-friendly pavement and a construction method.
Background
The road surface directly influences the driving comfort and safety. The road has very strict requirements on various indexes such as the wear resistance, the traffic load, the durability and the like of concrete.
Petroleum asphalt is a material which can not be lost in pavement materials, the quality and the driving comfort of asphalt pavements are directly influenced by a performance structure, the use of the asphalt pavement is greatly influenced by temperature, and the service performance is improved by adding polymers. The epoxy asphalt is not epoxy resin or asphalt, and is a multi-component interpenetrating network three-dimensional structure thermosetting material formed by a chemical reaction through a precise component and phase state design. In actual life, when the temperature of the asphalt pavement is extremely high in summer, the pavement is soft and is easy to push, and large deformation occurs to cause rutting; when the temperature is lower in winter, the cold cracking shrinkage is caused, and the aging resistance is weaker.
As for gravel road surfaces, when the gravel road surfaces are eroded by water, the easy-to-dent strength of the road surfaces is obviously reduced. The method is easily influenced by factors such as working environment, materials and the like, the pavement construction quality is unstable, and the most important is that the consumption of common stones is large, aggregates are lack of and cannot be regenerated, and the wear resistance is poor.
The rice hull ash is mainly composed of silicon dioxide and carbon which is not burnt out, a layer of very compact silicon dioxide protective film is arranged on the surface of the rice hull ash, the surface of the rice hull ash is enlarged, and a criss-cross interlayer is arranged between the inner surfaces of the rice hull ash to isolate the inside from the outside, the rice hull ash contains more holes, is loose and is cellular, and has volcanic ash activity. Researches find that the rice hull ash has equivalent calcium hydroxide absorbing capacity to silica fume and is stronger than fly ash and stone powder.
The steel slag is a solid waste for industrial steel making, contains various oxides formed by oxidation of silicon, sulfur, calcium and the like, has large national discharge capacity, reaches 8 million tons, and causes huge burden on the environment due to huge stockpiling quantity. The steel slag can bring huge economic benefit through a production line, the steel slag used in the road pavement does not interfere telecommunication work, has good impermeability and drainage, reduces the phenomena of expansion, arching and loosening, shows excellent skid resistance, has good pavement performance, and can further improve the wear resistance of the pavement by replacing aggregate.
At present, the yield of construction waste is very large, more types of waste can be added after removal, land development and natural disasters, the waste is not easy to degrade and is very firm, and the travel and the living of people can be seriously influenced when the waste is accumulated in cities. The reduction treatment and the targeted recycling of the construction wastes in municipal engineering become a serious game for the development of the construction industry in China.
The invention discloses an asphalt mixture and a production process thereof in CN109180077A, which relate to the field of building materials and comprise the following components: 4-12 wt% of modified asphalt, 72-88 wt% of aggregate, 5-10 wt% of filler, 0.5-3 wt% of fiber stabilizer, 0.5-3 wt% of anti-rutting agent and 5.6-14% of oilstone ratio; the modified asphalt comprises base asphalt and SBS, wherein the SBS accounts for 5-8 wt% of the total amount of the base asphalt, and the asphalt mixture has the advantages of high dynamic stability, strong anti-rutting capability, good water stability and suitability for airport runways. The asphalt material is greatly influenced by temperature, and has high cost and poor aging resistance.
Disclosure of Invention
The utility model provides a wear-resisting environment-friendly road surface of shock-resistant, includes surface course (1), basic unit (2), soil cloth layer (3) and way base (4), its characterized in that: surface course (1) is equipped with wearing layer (11) and grit level slag layer (12), wearing layer (11) is the ultra high performance concrete for doping glass powder and rice husk ash, grit level slag layer (12) inside is made by materials such as grit level waste steel slag, epoxy and pitch, curing agent, basic unit (2) are equipped with high modulus epoxy asphalt slag layer (21) and construction recovery layer (22), construction recovery layer (22) are equipped with stone bits filler (23), below geotextile layer (3) position construction recovery layer (22), on roadbed (4), firm in connection.
Preferably, the surface of the wear-resistant layer (11) in the surface layer (1) is designed with a grooving process, the grooving process is arranged at equal intervals, the groove widths are the same, and the number of the grooves is multiple.
Preferably, the gravel-level steel slag layer is epoxy resin asphalt steel slag concrete, and the steel slag passes through a jaw crusher, a cone crusher and an impact crusher and is crushed and separated by screening equipment. Herein grit grade steel slag was added. The steel slag with the grain size of 8-18 mm in the high-modulus epoxy asphalt steel slag layer (21) can be firmly combined with asphalt.
Preferably, the ultra-high performance concrete of the wear-resistant layer of the surface layer comprises cement, fly ash, quartz powder, rice hull ash, water, glass powder, a water reducing agent and steel fibers. 780 parts of cement 770-containing materials, 37-39 parts of fly ash, 158 parts of fine-particle-size glass powder, 218 parts of coarse-particle-size glass powder, 870 parts of quartz sand 860-containing materials, 156 parts of rice hull ash 150-containing materials, 205 parts of water 180-containing materials, 190 parts of steel fiber 170-containing materials and 45-47 parts of water reducing agents.
Preferably, the epoxy asphalt steel slag layer comprises the following components in parts by weight: 150 parts of asphalt, 50-100 parts of granulated blast furnace slag powder, 1-6 parts of curing agent, 5-50 parts of epoxy resin loading powder and 50 parts of steel slag. The epoxy loading powder is prepared by mixing graphite dried at 105 ℃ with epoxy resin at 120 ℃ for storage for 3 hours and then cooling to room temperature. The main preparation process is that epoxy resin load powder, curing agent and granulated blast furnace slag powder are evenly mixed and added into asphalt, and finally steel slag is added.
The construction method of the impact-resistant wear-resistant environment-friendly pavement is characterized by comprising the following construction steps of:
(1) cleaning and impacting and rolling the roadbed, and arranging the anti-filtration geotextile;
(2) constructing a base layer: paving a coarse gravel layer on the lower part, and paving a high-modulus epoxy asphalt steel slag layer on the upper part;
(3) paving a gravel-level steel slag layer on the upper part of the high-modulus epoxy asphalt steel slag layer, and flatly paving and compacting;
(4) and finally, laying a wear-resistant layer, and grooving the wear-resistant layer to relieve the water film phenomenon.
The expansion joint in the pavement is filled with epoxy asphalt, so that the expansion joint is impact-resistant and is not easy to damage, and the service life of the road is prolonged.
The wear-resistant layer (11) is made of ultra-high performance concrete doped with glass powder and rice hull ash, the rice hull ash contains a large number of nano-scale pores, the large number of silica gel ions are non-tightly cohered, and the honeycomb-shaped holes on the interlayer are additionally arranged, so that the rice hull ash has a large specific surface area and ultra-high pozzolan activity under the double actions. Meanwhile, the glass powder is rich in silicon dioxide, and the dispersibility of the glass powder is good, so that the fluidity of the ultra-high performance concrete can meet the requirement. The volcanic ash benefits of the glass powder and the rice hull ash are reasonably utilized, the two are mutually promoted chemically and physically, the consumption of cement, silica fume and quartz sand is reduced by proper substitution, the cost is reduced, waste is changed into valuable, and the great deformation and cracking cannot be generated after millions of times of wheel rolling, so that the service life of the airport pavement is prolonged to a great extent.
The waste steel slag used for the gravel-grade steel slag layer (12) and the high-modulus epoxy asphalt steel slag layer (21) accords with the economic development of green buildings. The epoxy asphalt slag layer is prepared by mixing asphalt, epoxy resin, steel slag, a curing agent and the like, has high strength and good temperature stability, and simultaneously has good durability, so that the thermoplastic property of the asphalt is changed into the thermosetting property, and the compactness and the stability of the asphalt are favorably improved. The epoxy asphalt fully wraps the steel slag and fills gaps between the surface layers, and rapidly generates chemical reaction to form higher interlayer bonding strength, and the road surface layers are firmly connected through the epoxy asphalt on the surface layers, so that the epoxy asphalt has excellent construction damage resistance.
The construction waste of the construction recovery layer (22) with the grain diameter of 2-60mm comprises waste concrete, waste masonry, dregs generated in the removal construction and other wastes. The rough machining of the construction waste is reasonably applied to the road structure, the surface is rough, the strength meets the requirement, the use of human resources is reduced, the cost is reduced, and the stone chip filling body is doped inside, so that the cement consumption is reduced.
Compared with the prior art, the invention has the beneficial effects that:
the pavement can bear vertical, transverse and vibration impact loads brought by the pavement, has high fatigue resistance, and has high skid resistance and wear resistance and high bearing capacity.
The wear-resistant layer in the surface layer is made of ultra-high performance concrete, glass powder and rice hull ash are ingeniously doped, the cost is low, the impermeability is good, and the wear-resistant layer has enough wear-resistant and smooth performance; the high modulus epoxy resin asphalt steel slag layer design of the gravel grade steel slag layer and the base layer inside the surface layer comprises steel slag which contains tricalcium silicate (C)3S), dicalcium silicate (C)2S) and active minerals with water hardening gelling property such as iron aluminate, steel slag replaces broken stone, fine aggregate and cement, and the road prepared by the steel slagThe epoxy asphalt has the advantages of high strength, rough surface, good durability, great volume weight, good stability and the like, is reasonable, has high elasticity and driving comfort of common matrix asphalt in mechanical property by adopting the epoxy asphalt, and is easy to disperse by graphite treatment. In addition, the special high adhesive force and weather durability between the epoxy resin and the internal steel slag increase the adhesive strength between pavement layers, improve the drawing strength and the shearing strength of the pavement, and resist deformation; the geotextile adopted in the soil cloth layer has good hydraulic property, can prevent the loss of soil particles, and not only reinforces the foundation but also plays a protective role.
Drawings
FIG. 1 is a pavement structure diagram;
FIG. 2 is a detailed construction diagram of a road;
FIG. 3 is a standard cross-sectional view of a roadway;
FIG. 4 is a view showing a sidewalk structure and a curb structure;
FIG. 5 is a schematic view of a pavement expansion joint;
fig. 6 is a wear layer grooving process.
Number designation in the figures: 1. a surface layer; 2. a base layer; 3. a soil cloth layer; 4. a roadbed; 11. a wear layer; 12. a gravel-grade slag layer; 21. a high modulus epoxy asphalt slag layer; 22. a layer of construction returns; 23. a stone chip filling body; 5. epoxy asphalt; 6. antirust paint; 7. a dowel bar; 8. gray sidewalk water bricks; 9. leveling layer of cement mortar; 10. a plain concrete base layer; 11. a fine stone concrete cushion; 12. a kerb.
Detailed Description
The utility model provides a wear-resisting environment-friendly road surface of shock-resistant, includes surface course (1), basic unit (2), soil cloth layer (3) and way base (4), its characterized in that: surface course (1) is equipped with wearing layer (11) and grit level slag layer (12), wearing layer (11) is the ultra high performance concrete who mixes glass powder and rice husk ash, grit level slag layer (12) inside is made by materials such as grit level waste steel slag, epoxy and pitch, basic unit (2) are equipped with high modulus epoxy asphalt slag layer (21) and building recovery layer (22), building recovery layer (22) are equipped with stone bits filler (23), below the building recovery layer (22) of geotextile layer (3) position department, on roadbed (4), firm in connection, the structural style is shown as figure 1 and figure 2, figure 3 is the standard cross sectional view of road surface.
The ultra-high performance concrete of the wear-resistant layer in the surface layer comprises cement, fly ash, quartz powder, rice hull ash, water, glass powder, a water reducing agent and steel fiber. 780 parts of cement 770-containing materials, 37-39 parts of fly ash, 158 parts of fine-particle-size glass powder, 218 parts of coarse-particle-size glass powder, 870 parts of quartz sand 860-containing materials, 156 parts of rice hull ash 150-containing materials, 205 parts of water 180-containing materials, 190 parts of steel fiber 170-containing materials and 45-47 parts of water reducing agents.
TABLE 1 concrete ratio of wearing course (Kg/m 3)
| Categories | Cement | Rice hull ash | Fly ash | Fine fraction glass powder | High-efficiency water reducing agent | Coarse-grain glass powder | Quartz sand | Water (W) | Steel fiber |
| Example 1 | 775.6 | 155.3 | 38.9 | 156.1 | 46.9 | 217.7 | 869.9 | 185.5 | 156 |
| Example 2 | 774.6 | 154.3 | 38.8 | 154.5 | 46.5 | 217.8 | 869.9 | 185.5 | 156 |
| Example 3 | 771.5 | 154.1 | 38.4 | 154.1 | 46.4 | 213.5 | 863.6 | 203.5 | 156 |
The expansion joint in the road surface is filled with epoxy asphalt (5), so that the expansion joint is impact-resistant and not easy to damage, the service life of the road is prolonged, the length is 2-3cm, and as shown in figure 4, the expansion joint is in a structural form, and the expansion joint comprises an antirust coating (6) and a dowel bar (7). Fig. 5 shows a sidewalk structure and a kerb structure, which are gray sidewalk water bricks (8), a cement mortar leveling layer (9), a plain concrete base layer (10) and a fine stone concrete cushion layer (11) from top to bottom, and kerbs (12) are arranged on the left side.
As shown in fig. 6, for the grooving process on the surface of the wear-resistant layer, grooves in different directions can be arranged according to the driving direction and the road surface condition, and transverse, longitudinal and oblique grooves can be arranged.
The materials described for the above examples are illustrated below:
the cement used was ordinary portland cement with a strength grade of 42.5. The average grain size of the used fine-grain glass powder is 0.3-0.4 μm, and the average grain size of the coarse-grain glass powder is 0.1-0.2 μm.
The average grain diameter of the quartz sand is 0.82-0.85 μm. The fly ash is original state fly ash, SiO2The content was 48.5%. The length L =13mm of the used steel fiber, the tensile strength is not lower than 2000Mpa, copper is plated on the surface, and the steel fiber accounts for 2% of the total volume of all material systems. The water reducing agent is a liquid polycarboxylic acid water reducing agent. The silica fume contains more silica than95.8%。
The epoxy asphalt steel slag layer comprises the following components in parts by weight: 150 parts of asphalt, 50-100 parts of granulated blast furnace slag powder, 1-6 parts of curing agent, 5-50 parts of epoxy resin loading powder and 50 parts of steel slag. The epoxy loading powder is prepared by mixing graphite dried at 105 ℃ with epoxy resin at 120 ℃ for storage for 3 hours and then cooling to room temperature. The main preparation process is that epoxy resin load powder, curing agent and granulated blast furnace slag powder are evenly mixed and added into asphalt, and finally steel slag is added. The steel slag grain size is added according to the specific layer number.
The grit-grade waste steel slag material has hard particles, and the maximum particle size is less than 0.7 times the thickness of the grit layer and not more than 10 cm. The content of the particles with the particle diameter of less than 5mm cannot be more than 35 percent (volume ratio).
The construction method of the impact-resistant wear-resistant environment-friendly pavement is characterized by comprising the following construction steps of:
(1) cleaning and impacting and rolling the roadbed, setting a reverse filtering geotextile, wherein the heavy compaction degree D is more than or equal to 95 percent;
(2) constructing a base layer: the lower part is paved with a coarse gravel layer, and the upper part is paved with a high-modulus epoxy resin asphalt slag layer;
(3) paving a gravel-level steel slag layer on the upper part of the high-modulus epoxy resin asphalt steel slag layer, and flatly paving and compacting;
(4) and finally, laying a wear-resistant layer, and grooving the wear-resistant layer to relieve the water film phenomenon.
Claims (8)
1. The utility model provides a wear-resisting environment-friendly road surface of shock-resistant, includes surface course (1), basic unit (2), soil cloth layer (3) and way base (4), its characterized in that: surface course (1) is equipped with wearing layer (11) and grit level slag layer (12), wearing layer (11) is the ultra high performance concrete for doping glass powder and rice husk ash, grit level slag layer (12) inside is made by materials such as grit level waste steel slag, epoxy and pitch, curing agent, basic unit (2) are equipped with high modulus epoxy asphalt slag layer (21) and construction recovery layer (22), construction recovery layer (22) are equipped with stone bits filler (23), below geotextile layer (3) position construction recovery layer (22), on roadbed (4), firm in connection.
2. The impact-resistant wear-resistant environment-friendly pavement according to claim 1, characterized in that the surface of the wear-resistant layer (11) in the pavement (1) is provided with a grooving process, the grooving process is arranged equidistantly, the groove widths are the same, and the number of grooves is multiple.
3. The wear-resistant layer of the surface layer comprises raw materials of cement, fly ash, quartz powder, rice hull ash, water, glass powder, a water reducing agent and steel fibers.
4. 780 parts of cement 770-containing materials, 37-39 parts of fly ash, 158 parts of fine-particle-size glass powder, 218 parts of coarse-particle-size glass powder, 870 parts of quartz sand 860-containing materials, 156 parts of rice hull ash 150-containing materials, 205 parts of water 180-containing materials, 190 parts of steel fiber 170-containing materials and 45-47 parts of water reducing agents.
5. The impact-resistant wear-resistant environment-friendly pavement according to claim 1, wherein the gravel-grade steel slag layer is epoxy asphalt steel slag concrete, and the epoxy resin is treated by graphite and is doped into the gravel-grade steel slag.
6. The impact-resistant wear-resistant environment-friendly pavement as claimed in claims 1 and 3, wherein the grit-grade steel slag material is hard and has a maximum particle size of less than 0.7 times the thickness of the grit layer and not more than 10 cm.
7. The impact-resistant wear-resistant environment-friendly pavement as claimed in claim 1, wherein the construction waste layer (22) is 2-60mm of construction waste, and the construction waste comprises waste concrete, waste masonry, residue soil generated in demolition construction and other wastes, and is subjected to rough machining.
8. The construction method of the impact-resistant wear-resistant environment-friendly pavement according to the claims 1-5, characterized by comprising the following construction steps:
1) cleaning and impacting and rolling the roadbed, and arranging the anti-filtration geotextile;
2) constructing a base layer: paving a coarse gravel layer on the lower part, and paving a high-modulus epoxy asphalt steel slag layer on the upper part;
3) paving a gravel-level steel slag layer on the upper part of the high-modulus epoxy asphalt steel slag layer, and flatly paving and compacting;
4) and finally, laying a wear-resistant layer, and grooving the wear-resistant layer to relieve the water film phenomenon.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113123188A (en) * | 2021-04-23 | 2021-07-16 | 广东汇晟建设有限公司 | Asphalt concrete pavement construction method |
| CN113213812A (en) * | 2021-03-31 | 2021-08-06 | 武冈凌峰新能源材料有限公司 | Novel cement-free building material and preparation method thereof |
| CN116813273A (en) * | 2023-06-19 | 2023-09-29 | 湖北路城建设科技有限公司 | Slag soil type building rubbish regenerated stone plate and preparation method thereof |
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| CN109626887A (en) * | 2019-01-03 | 2019-04-16 | 长安大学 | A kind of high-strength frost-resistant concrete mending mortar and preparation method thereof |
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| CN201785689U (en) * | 2010-04-23 | 2011-04-06 | 北京市市政工程研究院 | Large-gap water draining and noise reducing asphalt pavement built by utilizing steel slags |
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| CN116813273B (en) * | 2023-06-19 | 2024-03-19 | 湖北路城建设科技有限公司 | Slag soil type building rubbish regenerated stone plate and preparation method thereof |
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Application publication date: 20200911 |