CN111455765A - Mechanical rolling construction method for pervious concrete - Google Patents
Mechanical rolling construction method for pervious concrete Download PDFInfo
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- CN111455765A CN111455765A CN202010247046.9A CN202010247046A CN111455765A CN 111455765 A CN111455765 A CN 111455765A CN 202010247046 A CN202010247046 A CN 202010247046A CN 111455765 A CN111455765 A CN 111455765A
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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
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1066—Oxides, Hydroxides
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
- C04B41/483—Polyacrylates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/62—Coating or impregnation with organic materials
- C04B41/63—Macromolecular compounds
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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
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/221—Kerbs or like edging members, e.g. flush kerbs, shoulder retaining means ; Joint members, connecting or load-transfer means specially for kerbs
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- 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
Abstract
The invention provides a mechanical rolling construction method for pervious concrete, which comprises the following steps of 1: preparing a reinforcing fiber; step 2: adopting water, pebbles, cement, an SR reinforcing agent, a PCA polycarboxylic acid water reducing agent, MC methyl cellulose and a color pigment to mix the concrete; and step 3: mixing reinforced fiber, concrete, HY-4100 hydrophobic agent of fluorine and silicon, lignin, and p-hydroxybenzene sulfonic acid; covering the kerbs on two sides of the construction road section with plastic films; and 4, step 4: installing the curb and covering the curb with a plastic film; and 5: mechanically paving pervious concrete on the pavement; step 6: compacting the paved pervious concrete; and 7: performing press polish treatment on local uneven parts by adopting a disc polisher; and 8: wet curing by covering the road surface and the side surface with a plastic film and a cotton felt; and step 9: and (4) carrying out surface treatment on all pavements by adopting a sealant. The pervious concrete with high compressive strength and excellent water permeability can be prepared by adopting the mechanical rolling construction method for pervious concrete.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a mechanical rolling construction method for pervious concrete.
Background
At present, the pavement structure mostly adopts a common concrete pavement and an asphalt concrete pavement which are both waterproof structures, so that the environmental problems of waterlogging in cities, dry underground water level and local microclimate are caused, and 0GFC and pervious concrete are born in internal thinking of the industry.
The invention with Chinese patent application number 201810001304.8 discloses a pervious concrete pavement structure and a construction method, the pervious concrete pavement structure comprises a plain soil tamped layer, a cushion layer, a natural color pervious concrete layer and a pervious adhesive stone layer, the cushion layer is arranged on the surface of the plain soil tamped layer, the natural color pervious concrete layer is paved on the cushion layer, and the pervious adhesive stone layer is arranged on the upper surface of the natural color pervious concrete layer, so that the pervious concrete pavement structure has the characteristics of high compressive strength and good water permeability; the construction method has the characteristics of simple process, high construction flatness, low labor intensity, high construction efficiency, easy construction quality control and the like, compared with the traditional construction method, the permeable adhesive stone layer is laid on the natural-color permeable concrete layer, watering maintenance is not needed after construction, dyeing is directly carried out, the whole permeable project can be completed within the shortest time, the construction period is shortened, and the labor cost is reduced.
For another example, the invention of chinese patent application No. 201710806211.8 discloses an asphalt pervious concrete pavement and a construction method thereof, wherein the pavement comprises an asphalt pervious concrete layer (1) and at least two reinforced layers (2) horizontally arranged in the asphalt pervious concrete layer (1). The pavement and the construction method provided by the invention can improve the strength and rigidity of the asphalt pervious concrete pavement, reduce the deformation of the pavement and prolong the service life of the pavement.
The prior art has at least the following problems:
the construction process of the pervious concrete has a plurality of problems at present, most of construction methods adopted in the industry are construction by a vibration method, most of parts of the pervious concrete can be used with the thickness of about 10cm (4+6cm or 3+7cm), so that the vibration process is inconvenient to implement, and even more, the pressure polishing process is directly adopted, so that the pervious concrete is not vibrated in place, and further, the panel is not broken in a short time after being constructed due to insufficient strength, or the phenomenon of poor water permeability effect due to excessive vibration is caused. In a word, the existing construction method of the pervious concrete cannot meet the requirement of mechanized construction, the construction quality is difficult to guarantee, and urgent solution is needed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a permeable concrete mechanical rolling construction method which can meet the mechanical requirement and improve the construction quality.
The mechanical rolling construction method of the pervious concrete comprises the following steps:
step 1: weighing 3 parts of tung oil, 10 parts of 0.5mm steel fiber and 5 parts of silicon powder according to the weight components, uniformly mixing by using a stirrer, and then discontinuously adding a reinforcing agent at 150 ℃ into the mixture of the tung oil, the 0.5mm steel fiber and the silicon powder for stirring to obtain the reinforcing fiber;
step 2: adopting water, pebbles, cement, an SR reinforcing agent, a PCA polycarboxylic acid water reducing agent, MC methyl cellulose and a color pigment to mix the concrete;
and step 3: placing 3 parts of the reinforced fiber prepared in the step 1, 40 parts of the concrete prepared in the step 2, 3 parts of HY-4100 fluorosilicone hydrophobic agent, 3 parts of lignin and 5 parts of p-hydroxybenzene sulfonic acid in a stirrer for mixing, adding 6 parts of water at the temperature of 80 ℃ for stirring to obtain a mixed raw material, stirring until the water content of the mixed raw material is 8%, and uniformly stirring to obtain the pervious concrete;
and 4, step 4: installing the curb and covering the curb with a plastic film;
and 5: paving pervious concrete on the pavement;
step 6: compacting concrete paved on the pavement;
and 7: performing press polish treatment on local uneven parts by adopting a disc polisher;
and 8: covering the pavement and the side surface with a plastic film and a cotton felt;
and step 9: cleaning the portion of the roadway having the contaminants; and (4) carrying out surface treatment on all pavements by adopting a sealant.
Further, the enhancer in the step 1 is prepared by uniformly mixing 8 parts by weight of polymethyl methacrylate, 3 parts by weight of octoxynol and 20 parts by weight of water at the solution temperature of 100 ℃ and the frequency of 50KHz by using an ultrasonic mixer.
Further, in step 2, the particle diameter of the stone is 4-7mm, and the bulk density is 1500kg/m3The surface of the stone is flat and smooth, the content of flaky stone particles is less than 1%, the content of mud is less than or equal to 0.5%, the crushing value is less than 15%, and the cement is P.O42.5-grade portland cement.
Further, the concrete in the step 2 is prepared from the following raw materials in parts by weight: 15120 parts of cement, 500 parts of SR enhancer, 65000 parts of pebble, 5480 parts of water, 165 parts of polycarboxylic acid water reducer, 7 parts of MC methyl cellulose and 300 parts of color pigment.
Further, in step 4, the step of installing the curb includes the following steps:
step 4.1, measuring and paying off to determine the position of the curb, setting a pile position every 5m, and measuring and paying off the elevation on the pile top when measuring the pile position;
step 4.2, excavating edge stone foundation grooves, wherein the excavation width is 100mm wider than that of an edge stone foundation, and paving a C15 concrete cushion layer with the thickness of 100 mm;
and 4.3, encapsulating the outer side of the curb by using C20 fine-stone concrete, pointing the adjacent curb by using battens with the thickness of 5mm, and adopting M10 cement mortar for pointing.
Further, the step 5 of spreading concrete on the road surface comprises the following steps:
step 5.1, before the pervious concrete is flattened and constructed, a gravel layer of 10-20cm is laid on the foundation, and the gap of the gravel layer is 35-45%;
step 5.2, after the gravel layer is paved, uniformly sprinkling water on the gravel layer to wet the gravel layer, then uniformly paving the bottom layer pervious concrete, wherein the paving coefficient is 1.2, and after the bottom layer pervious concrete is paved, scraping the surface of the bottom layer pervious concrete by using a leveling machine;
and 5.3, vibrating the flat plate paved on the surface of the pervious concrete of the bottom layer twice by using a vibrating machine, rolling the flat plate once by using a roller, paving the pervious concrete of the surface layer to ensure that the aggregate between the surface layer and the bottom layer is fixedly bonded, and constructing the bottom layer and the surface layer at intervals of not more than 20 min.
Further, step 6 of compacting the concrete spread on the pavement includes:
step 6.1, compacting by using a full-hydraulic road roller with the model ADY-JS2000, the steel wheel size of 1000mm and the weight of 1980kg, carrying out static pressure rolling for 2-3 times, and overlapping wheel traces 1/3-1/2 in the rolling process;
6.2, tamping and rolling for 1 time by using low-frequency vibration;
and 6.3, using a road roller to perform edge rolling on two sides of the curb.
Further, step 7, a disc polishing machine is adopted to perform 2 times of polishing treatment on the local uneven part.
Further, after the plastic film and the cotton felt cover the road surface and the side surface in the step 8, the temperature inside and outside is measured by a temperature detector every 12 hours, and the temperature difference is not more than 15 ℃.
Further, in the step 9, the pervious concrete pavement is washed by high-pressure water, the washing water pressure is not less than 40MPa, and the sealing agent is prepared from the following raw materials in parts by weight: 60 parts of acrylic emulsion, 3 parts of thickening agent and 37 parts of water.
Compared with the prior art, the mechanical rolling construction method for the pervious concrete has the following advantages:
1. by adopting the mechanical rolling construction method for the pervious concrete, the prepared pervious concrete is mixed with the concrete by adopting the reinforced fibers, the silica powder is attached to the steel fibers by utilizing the tung oil and the reinforcing agent to form the reinforced fibers, the supporting force and the structural strength of the fibers are improved, and when the pervious concrete is mixed with the concrete, the pervious concrete can be fixed with the single-stage matched stones under the action of the p-hydroxyphenylsulfonic acid, a loose porous structure is formed inside the concrete, so that the pervious concrete is favorable for permeating water and draining, a waterproof diaphragm can be formed in the concrete under the action of the hydrophobing agent, the rainwater is prevented from permeating into the material of the concrete, the rainwater is favorably drained along the porous structure, and the water permeability is good.
2. The mechanical rolling construction method for the pervious concrete has the advantages that the rolling of the pervious concrete is reasonable and efficient, the construction period can be shortened, and the compressive strength and the water permeability of the concrete can be improved.
3. The mechanical rolling construction method for the pervious concrete can realize mechanical construction and save manpower and material resources.
Detailed Description
Example 1
The mechanical rolling construction method of the pervious concrete comprises the following steps:
step 1: weighing 3 parts of tung oil, 10 parts of 0.5mm steel fiber and 5 parts of silicon powder according to the weight components, uniformly mixing by using a stirrer, and then discontinuously adding a reinforcing agent at 150 ℃ into the mixture of the tung oil, the 0.5mm steel fiber and the silicon powder for stirring to obtain the reinforcing fiber;
step 2: adopting water, pebbles, cement, an SR reinforcing agent, a PCA polycarboxylic acid water reducing agent, MC methyl cellulose and a color pigment to mix the concrete;
and step 3: placing 3 parts of the reinforced fiber prepared in the step 1, 40 parts of the concrete prepared in the step 2, 3 parts of HY-4100 fluorosilicone hydrophobic agent, 3 parts of lignin and 5 parts of p-hydroxybenzene sulfonic acid in a stirrer for mixing, adding 6 parts of water at the temperature of 80 ℃, stirring to obtain a mixed raw material, stirring until the water content of the mixed raw material is 8%, and uniformly stirring to obtain the pervious concrete;
and 4, step 4: installing the curb and covering the curb with a plastic film;
and 5: spreading concrete on the road surface;
step 6: compacting concrete paved on the pavement;
and 7: performing press polish treatment on local uneven parts by adopting a disc polisher;
and 8: covering the pavement and the side surface with a plastic film and a cotton felt;
and step 9: cleaning the portion of the roadway having the contaminants; and (4) carrying out surface treatment on all pavements by adopting a sealant.
Further, the enhancer in the step 1 is prepared by uniformly mixing 8 parts by weight of polymethyl methacrylate, 3 parts by weight of octoxynol and 20 parts by weight of water at the solution temperature of 100 ℃ and the frequency of 50KHz by using an ultrasonic mixer.
Further, in step 2, the particle diameter of the stone is 4-7mm, and the bulk density is 1500kg/m3The stone surface is flat and smooth, the content of flaky stone particles is less than 1%, the mud content is less than or equal to 0.5%, the crushing value is less than 15%, and the cement is P.O 42.5.5-grade portland cement.
Further, in step 2, tests were conducted on the following components in terms of the cement 15120 parts, the SR enhancer 500 parts, the pebble 65000 parts, the water 5480 parts, the polycarboxylic acid water reducing agent 165 parts, and the MC methylcellulose 7 parts by weight, in addition to the blending amounts of the color pigments in the following parts by weight as specified in table 1:
blending amount test of color pigment
Coring concrete of each group after carrying out on-site implementation for 7 days and 28 days, and carrying out compressive strength and water permeability tests by using a concrete compression testing machine and a concrete water permeability coefficient tester, wherein the test results are as follows:
blending amount test detection result of color pigment
| Serial number | Colour pigment (share) | 7 days Strength (MPa) | 28 days strength (MPa) | Permeability (cm/s) |
| 1 | 250 | 7.2 | 16.3 | 0.29 |
| 2 | 260 | 13.21 | 22.1 | 0.31 |
| 3 | 270 | 18.9 | 27.4 | 0.10 |
| 4 | 280 | 19.2 | 25.3 | 0.19 |
| 5 | 290 | 19.4 | 30.5 | 0.21 |
| 6 | 300 | 20.5 | 31.7 | 0.17 |
| 7 | 310 | 22.8 | 28.6 | 0.12 |
It is seen from the table that when the color pigment (part) is 300 parts, the concrete has the highest 28-day compressive strength and high water permeability, and the requirements can be met, so that the concrete is determined by mass: the optimal mixture ratio is 15120 parts of cement, 500 parts of SR intensifier, 65000 parts of pebble, 5480 parts of water, 165 parts of polycarboxylic acid water reducer, 7 parts of MC methyl cellulose and 300 parts of color pigment.
Further, in step 4, the step of installing the curb includes the following steps:
step 4.1, measuring and paying off to determine the position of the curb, setting a pile position every 5m, and measuring and paying off the elevation on the pile top when measuring the pile position;
step 4.2, excavating edge stone foundation grooves, wherein the excavation width is 100mm wider than that of an edge stone foundation, and paving a C15 concrete cushion layer with the thickness of 100 mm;
and 4.3, encapsulating the outer side of the curb by using C20 fine-stone concrete, controlling the joint pointing of the adjacent curb by using battens with the thickness of 5mm, and adopting M10 cement mortar for the joint pointing.
Further, the step 5 of spreading concrete on the road surface comprises the following steps:
and 5.1, before the permeable concrete is flattened and constructed, paving a 10-20cm gravel layer on the foundation, wherein the gap of the gravel layer is 35-45% to form a double-layer drainage road surface consisting of an upper permeable concrete layer with small porosity and a lower gravel layer with large porosity, and the upper permeable concrete road surface with small porosity can effectively prevent coarse and fine particles from entering the lower layer to form a 'screening effect'.
Step 5.2, after the gravel layer is paved, uniformly sprinkling water on the gravel layer to wet the gravel layer, uniformly paving the bottom layer pervious concrete, controlling the paving coefficient to be 1.2, and scraping the surface of the bottom layer pervious concrete by using a leveling machine after the bottom layer pervious concrete is paved;
and 5.3, vibrating the flat plate paved on the surface of the pervious concrete of the bottom layer twice by using a vibrating machine, rolling the flat plate once by using a roller, paving the pervious concrete of the surface layer to ensure that the aggregate between the surface layer and the bottom layer is fixedly bonded, and constructing the bottom layer and the surface layer at intervals of not more than 20 min.
Further, the step 6 of spreading concrete on the compacted pavement comprises the following steps:
step 6.1, compacting by using a full-hydraulic road roller with the model ADY-JS2000, the steel wheel size of 1000mm and the weight of 1980kg, carrying out static pressure rolling for 2-3 times, and overlapping wheel traces 1/3-1/2 in the rolling process;
6.2, tamping and rolling for 1 time by using low-frequency vibration;
and 6.3, using a small-sized road roller to perform edge rolling on two sides of the curb.
The tests carried out on the pervious concrete compaction mode and times are shown in the following table:
rolling mode and times test design
Coring the pervious concrete of each group after carrying out on-site implementation for 7 days and 28 days, and carrying out tests on the compressive strength and the water permeability by using a concrete compression testing machine and a concrete water permeability coefficient tester, wherein the test results are as follows:
statistical table of rolling mode and times test detection results
From the above table, it can be seen that the rolling mode and the rolling pass are static rolling for 2 times, when the concrete is vibrated for 1 time, the pervious concrete 28d has the highest compressive strength and high water permeability, and can also meet the requirements, and finally the full hydraulic road roller is used for static rolling for 2-3 times, and the low-frequency vibratory tamper is used for rolling for 1 time.
Further, in step 7, a disk polisher is used to polish the local uneven part for 2 times. The following is a fleet test for calendering passes on pervious concrete.
Calendering number gradient test design table
| Group by group | 1 | 2 | 3 | 4 | 5 |
| Number of calendering times (times) | 0 | 1 | 2 | 3 | 4 |
The calendering tests were completed according to the bench test design chart and the results were statistically analyzed as follows:
test result of calendering time gradient test
| Serial number | Number of calendering times (times) | Surface slushing condition | Flatness out of standard condition |
| 1 | 0 | Without slurry spreading | Out of limits |
| 2 | 1 | Without slurry spreading | Out of limits |
| 3 | 2 | Without slurry spreading | Not exceeding standard |
| 4 | 3 | Light slushing | Not exceeding standard |
| 5 | 4 | Severe slushing | Not exceeding standard |
From the above table, it can be seen that the polishing machine performs polishing for 2 times, which is the best time, and the leveling effect is good without local slurry.
Further, after the plastic film and the cotton felt cover the road surface and the side surface in the step 8, the temperature inside and outside is measured by a temperature detector every 12 hours, and the temperature difference is not more than 15 ℃.
Furthermore, the pervious concrete pavement is flushed by high-pressure water, and the flushing water pressure is not less than 40 MPa.
Further, the pavement part after being cleaned with pollutants is subjected to surface treatment by adopting a sealant, and the following results are obtained by testing the mass part ratio of the sealant:
the optimal mass part ratio of the sealing agent is 60 parts of acrylic emulsion, 3 parts of thickening agent and 37 parts of water.
And further, carrying out pavement dividing seam cutting after the pervious concrete pavement is poured, and specifically carrying out pavement dividing seam cutting 24 hours after the pervious concrete pavement is poured, wherein the width of a contraction joint is 10-15 mm, and the depth is 50 mm.
The present invention is not limited to the above-described embodiments, and any variations, modifications, and alterations that may occur to one skilled in the art without departing from the spirit of the invention are intended to be within the scope of the invention.
Claims (10)
1. A mechanical rolling construction method for pervious concrete is characterized by comprising the following steps:
step 1: weighing 3 parts of tung oil, 10 parts of 0.5mm steel fiber and 5 parts of silicon powder according to the weight components, uniformly mixing by using a stirrer, and then discontinuously adding a reinforcing agent at 150 ℃ into the mixture of the tung oil, the 0.5mm steel fiber and the silicon powder for stirring to obtain the reinforcing fiber;
step 2: adopting water, pebbles, cement, an SR reinforcing agent, a PCA polycarboxylic acid water reducing agent, MC methyl cellulose and a color pigment to mix the concrete;
and step 3: placing 3 parts of the reinforced fiber prepared in the step 1, 40 parts of the concrete prepared in the step 2, 3 parts of HY-4100 fluorosilicone hydrophobic agent, 3 parts of lignin and 5 parts of p-hydroxybenzene sulfonic acid in a stirrer for mixing, adding 6 parts of water at the temperature of 80 ℃ for stirring to obtain a mixed raw material, stirring until the water content of the mixed raw material is 8%, and uniformly stirring to obtain the pervious concrete;
and 4, step 4: installing the curb and covering the curb with a plastic film;
and 5: paving pervious concrete on the pavement;
step 6: compacting concrete paved on the pavement;
and 7: performing press polish treatment on local uneven parts by adopting a disc polisher;
and 8: covering the pavement and the side surface with a plastic film and a cotton felt;
and step 9: cleaning the portion of the roadway having the contaminants; and (4) carrying out surface treatment on all pavements by adopting a sealant.
2. The mechanical rolling construction method for pervious concrete according to claim 1, wherein the enhancer of step 1 comprises 8 parts by weight of polymethyl methacrylate, 3 parts by weight of octoxynol and 20 parts by weight of water, and is prepared by uniformly mixing the components at a frequency of 50KHz and a solution temperature of 100 ℃ by using an ultrasonic mixer.
3. The mechanical roller compaction construction method for pervious concrete according to claim 1, wherein the particle size of the stones in step 2 is 4-7mm, and the bulk density is 1500kg/m3The surface of the stone is flat and smooth, the content of flaky stone particles is less than 1%, the content of mud is less than or equal to 0.5%, the crushing value is less than 15%, and the cement is P.O42.5-grade portland cement.
4. The mechanical rolling construction method for pervious concrete according to claim 1, wherein the concrete in the step 2 is prepared from the following raw materials in parts by weight: 15120 parts of cement, 500 parts of SR enhancer, 65000 parts of pebble, 5480 parts of water, 165 parts of polycarboxylic acid water reducer, 7 parts of MC methyl cellulose and 300 parts of color pigment.
5. The mechanical roller compaction construction method for pervious concrete according to claim 1, wherein the step 4 of installing the kerb comprises the following steps:
step 4.1, measuring and paying off to determine the position of the curb, setting a pile position every 5m, and measuring and paying off the elevation on the pile top when measuring the pile position;
step 4.2, excavating edge stone foundation grooves, wherein the excavation width is 100mm wider than that of an edge stone foundation, and paving a C15 concrete cushion layer with the thickness of 100 mm;
and 4.3, encapsulating the outer side of the curb by using C20 fine-stone concrete, pointing the adjacent curb by using battens with the thickness of 5mm, and adopting M10 cement mortar for pointing.
6. The mechanical roller compaction construction method for pervious concrete according to claim 1, wherein the step 5 of spreading concrete on the road surface comprises:
step 5.1, before the pervious concrete is flattened and constructed, a gravel layer of 10-20cm is laid on the foundation, and the gap of the gravel layer is 35-45%;
step 5.2, after the gravel layer is paved, uniformly sprinkling water on the gravel layer to wet the gravel layer, then uniformly paving the bottom layer pervious concrete, wherein the paving coefficient is 1.2, and after the bottom layer pervious concrete is paved, scraping the surface of the bottom layer pervious concrete by using a leveling machine;
and 5.3, vibrating the flat plate paved on the surface of the pervious concrete of the bottom layer twice by using a vibrating machine, rolling the flat plate once by using a roller, paving the pervious concrete of the surface layer to ensure that the aggregate between the surface layer and the bottom layer is fixedly bonded, and constructing the bottom layer and the surface layer at intervals of not more than 20 min.
7. The mechanical roller compaction construction method for pervious concrete according to claim 1, wherein the step 6 of compacting the concrete paved on the pavement comprises:
step 6.1, compacting by using a full-hydraulic road roller with the model ADY-JS2000, the steel wheel size of 1000mm and the weight of 1980kg, carrying out static pressure rolling for 2-3 times, and overlapping wheel traces 1/3-1/2 in the rolling process;
6.2, tamping and rolling for 1 time by using low-frequency vibration;
and 6.3, using a road roller to perform edge rolling on two sides of the curb.
8. The mechanical rolling construction method for pervious concrete according to claim 1, wherein 2 times of burnishing treatment is performed on the local uneven part by using a disc burnishing machine in the step 7.
9. The mechanical rolling construction method for pervious concrete according to claim 1, wherein the temperature inside and outside the pavement and the side surfaces are measured by a temperature meter every 12 hours after the plastic film and the cotton felt cover the pavement and the side surfaces, and the temperature difference is not more than 15 ℃.
10. The mechanical rolling construction method for the pervious concrete according to claim 1, wherein the pervious concrete pavement in the step 9 is washed by high-pressure water, the washing water pressure is not less than 40MPa, and the sealant is prepared from the following raw materials in parts by weight: 60 parts of acrylic emulsion, 3 parts of thickening agent and 37 parts of water.
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