CN110453570A - A kind of urban road water conservation temperature reduction construction of compound road surface method - Google Patents
A kind of urban road water conservation temperature reduction construction of compound road surface method Download PDFInfo
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- CN110453570A CN110453570A CN201910846240.6A CN201910846240A CN110453570A CN 110453570 A CN110453570 A CN 110453570A CN 201910846240 A CN201910846240 A CN 201910846240A CN 110453570 A CN110453570 A CN 110453570A
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- water
- road surface
- road
- temperature reduction
- water conservation
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Classifications
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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
- 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
-
- 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
- E01C11/24—Methods or arrangements for preventing slipperiness or protecting against influences of the weather
-
- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/08—Apparatus for transporting and heating or melting asphalt, bitumen, tar, or the like
-
- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/18—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect
- E01C19/185—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect for both depositing and spreading-out or striking-off the deposited mixture
-
- 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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/03—Arrangements for curing paving; Devices for applying curing means; Devices for laying prefabricated underlay, e.g. sheets, membranes; Protecting paving under construction or while curing, e.g. use of tents
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Abstract
The present invention relates to a kind of urban road water conservation temperature reduction construction of compound road surface methods comprising following steps: S01 clears up place to be paved；S02, Asphalt mix for open-graded friction course construction, by big bituminous mixture laying in place to be paved；S03, water-retentive cement mortar pour into, and are poured into water-retentive cement mortar in the gap of Asphalt mix for open-graded friction course by water-keeping mortar sprinkling wagon；S04, the sprinkling of retarder, after grouting, road pavement carries out sprinkling retarder；S05, is rinsed, and road pavement is scrubbed；S06, health successively cover wet curing film, geotechnological felt, geotextiles, straw screen or mat in road surface, and uniform sprinkling for several times, makes covering bottom remain dampness daily；S07, quality testing and examination.The present invention has the effect of assigning road water conservation and cool down, and provides very big help to reducing pavement temperature, improving urban heat land effect.
Description
Technical field
The present invention relates to the technical fields of urban road construction, more particularly, to a kind of urban road water conservation temperature reduction combined type
Pavement construction method.
Background technique
Currently, since urban area development is increasingly huge, so that densely populated, waterproof construction area increases, heat extraction machine
Device is various, and the chance that result causes natural precipitation to penetrate into surface soil is reduced relatively, and the thermal balance in city is destroyed, so that
It can not be discharged in road surface heat.Improve city " heat island " effect, the water conservation temperature reduction road reduced the influence to ecology, save water resource
Face becomes following development trend.
Existing Authorization Notice No. provides a kind of colored cool down road surface and its construction method, the colour for CN104074116B
Cooling road surface is used mats formation the identical efficient photothermal reflectance particle of nanoscale of mixture colour system with color antiskid thin layer, inserts to coloured silk
In color ceramic aggregate, in road surfacing color antiskid thin layer.The present invention mats formation in conventional color antiskid thin layer inside mixture, adds
Enter efficient photothermal reflectance particle, is reduced under megathermal climate environment using the light reflection of photothermal reflectance particle, function of heat reflection
Road table temperature.
But in the above-mentioned technical solutions, although the effect of certain reduction road table temperature can be played, in rainy season
When, the road surface water-holding capacity is poor, and cause to gather a large amount of puddles of water on the table of road, influences the normally travel of vehicle, thus it is to be improved.
Summary of the invention
In view of the deficienciess of the prior art, the object of the present invention is to provide a kind of urban road water conservation temperature reduction combined type roads
Surface construction method has the effect of so that road surface while having water storage and cooling.
Foregoing invention purpose of the invention has the technical scheme that
A kind of urban road water conservation temperature reduction construction of compound road surface method, includes the following steps:
S01 clears up place to be paved；
S02, Asphalt mix for open-graded friction course construction, by big bituminous mixture laying in place to be paved, before two pavers
After be staggered 10-20m, carried out in echelon's mode is synchronous, width control that overlapped between two width is in 30-60mm, spreading speed control
System is in 1-3m/min；After the completion of paving, the maximum vibration function that rams is started using 12t steel roller and is carried out vibroroller cmpacting 1-2 times；Then
It is rolled 2-3 times using static pressure method；Finally, carrying out receipts light with the steel roller of < 7t；
S03, water-retentive cement mortar pour into, and water-retentive cement mortar is poured into big gap pitch by water-keeping mortar sprinkling wagon and is mixed
In the gap of material；
S04, the sprinkling of retarder, after grouting, road pavement carries out sprinkling retarder；
S05, is rinsed, and road pavement is scrubbed；
S06, health successively cover wet curing film, geotechnological felt, geotextiles, straw screen or mat, and uniform sprinkling number daily in road surface
It is secondary, so that covering bottom is remained dampness；
S07, quality testing and examination.
By using above-mentioned technical proposal, conventional composite formula road surface rigid material asking in conjunction with flexible material is overcome
The problem of topic, cement mortar poor fluidity and easy cracking, the precursor skeleton of structure is formed with the asphalt of open gradation,
Skeleton and pitch mutually bond, and form the flexible portion of structure；And water-retentive cement sand is poured on the basis of precursor skeleton structure
Slurry, after health, cement mortar solidifies west city composite pavement structure rigid element, provides and improve the road property on road surface significantly
Energy；Meanwhile cooling is realized by water conservation, alleviate urban heat land effect, improve living environment, there are significant economic benefits, society
It can benefit and environmental benefit.
The present invention is further arranged to: in the step S02, increase following steps:
S021, the production of Asphalt mix for open-graded friction course, Asphalt mix for open-graded friction course are formed by mineral aggregate and asphalt mixing, voidage
Control is in 20%-28%, and asphalt content is in 3.0%-4.5%；
S022, the transport of Asphalt mix for open-graded friction course are transported using large tonnage self-discharging type transport vehicle, and mixture reaches
The temperature of construction site is strict controlled in 140-160 DEG C.
By using above-mentioned technical proposal, the precursor skeleton of structure, skeleton and drip are formed with the asphalt of open gradation
Green mutually bonding, forms the flexible portion of structure；And water-retentive cement mortar, health are poured on the basis of precursor skeleton structure
Afterwards, cement mortar solidifies west city composite pavement structure rigid element；Since the gap of Asphalt mix for open-graded friction course is larger, it is easy
Ventilation and heat is generated, needs to carry out sealing and heat preservation during transportation, avoids temperature decline excessive, to prevent influencing following process
When asphalt and water-retentive cement mortar cementitiousness, to improve the quality after pavement forming.
The present invention is further arranged to: in the step S021, when Asphalt mix for open-graded friction course produces, and the heating temperature of pitch
At 150-170 DEG C, the heating temperature gathered materials is 10-20 DEG C higher than the heating temperature of pitch for degree control；The duration of mixing control of mixture
System is in 30-50s.
By using above-mentioned technical proposal, to gathering materials and the heating temperature of pitch and duration of mixing strict control, so that collection
Material and pitch can stir, to improve the quality after subsequent pavement forming.
The present invention is further arranged to: the bitumen aggregate ratio in the step S021 is controlled in design value ± 0.2%.
By using above-mentioned technical proposal, asphalt is a kind of gap grading asphalt, big portion in mixture
Timesharing coarse aggregate, fine aggregate is seldom, and oilstone is smaller, and the performance of mixture is very sensitive to bitumen aggregate ratio, when mixture bitumen aggregate ratio
When less than 0.2% or more design value, the intensity for rolling rear mixture can be greatly reduced, cause it is subsequent can not grouting construction, so
The bitumen aggregate ratio of palpus strict control mixture.
The present invention is further arranged to: in the step S03, the water-retentive cement mortar includes cement, miberal powder, thin
Sand, water and water-retaining agent, wherein water-retaining agent is industrial slag and diatomite, and the match ratio of the water-retentive cement mortar is cement: water: thin
Sand: miberal powder: industrial slag: diatomite=41.5:68.5:20:10:4:2.
By using above-mentioned technical proposal, water-keeping mortar is usually formulated by cementitious matter, water and water-retaining agent etc., by upper
Proportion is stated so that asphalt passes through silicon by industrial slag raising intensity with good compression strength and flexural strength
Diatomaceous earth improves water holding capacity.
The present invention is further arranged to: the water-retentive cement mortar is stirred by the way of plantmix in mix station-service mixing building
It mixes, charging sequence is followed successively by cement, water-keeping material, fine sand, water, and other materials dry mixing is closed 1-2min to equal before the addition of the water
It is even, add after water mix 2-3min again.
By using above-mentioned technical proposal, dry mixing first is carried out to sufficiently to cement, water-keeping material, fine sand before the addition of the water
It is even, carry out mix is then added water, in this way, making the mixture after mix more uniform.
The present invention is further arranged to: silane coupling agent is also added in the water-retentive cement mortar, it is described silane coupled
Agent is methyltrimethoxysilane.
By using above-mentioned technical proposal, silane coupling agent is added in water-retentive cement mortar, improves cement and pitch
Between combination interface, improve the ability and endurance in composite pavement anti-shrink crack.
The present invention is further arranged to: the retarder in the step S04 is the dew stone agent of liquid.
By using above-mentioned technical proposal, reveal the auxiliary material that stone agent is used exclusively for exposed concrete construction, is used for road
On the road, so that mortar surface is non-condensing within a certain period of time, when reaching some strength inside mortar, brushing surface mortar, dew
Coarse aggregate out, forms that surface texture is abundant, uniform road surface.
The present invention is further arranged to: the fountain height of the dew stone agent is controlled in 300 ± 15g/m2。
By using above-mentioned technical proposal, strict control reveals the fountain height of stone agent, so that dew stone agent sprinkling is uniform.
Invention is further arranged to: increase following steps in the step S04:
S041 covers health, after road surface plastic covering film, plastic covering film, is pressed sternly at the side, angle of plastic foil with wooden unit
It is real, in case plastic foil opening leads to moisture evaporation.
By using above-mentioned technical proposal, after the completion of sprinkling, need the cover film on road surface immediately, and the side of plastic foil,
It is compacted at angle with wooden unit, in case plastic foil opening leads to moisture evaporation.
In conclusion advantageous effects of the invention are as follows:
1. overcoming the problem of conventional composite formula road surface rigid material is in conjunction with flexible material, cement mortar poor fluidity and appearance
Problem easy to crack forms the precursor skeleton of structure with the asphalt of open gradation, and skeleton and pitch mutually bond, and forms knot
The flexible portion of structure；And water-retentive cement mortar is poured on the basis of precursor skeleton structure, after health, cement mortar solidifies west city
Composite pavement structure rigid element provides significantly and improves the pavement performance on road surface；Meanwhile cooling is realized by water conservation, delay
Urban heat land effect is solved, living environment is improved, there is significant economic benefits, social benefit and environmental benefit；
2. adding silane coupling agent in water-retentive cement mortar, the combination interface between cement and pitch is improved, is improved multiple
The ability and endurance in box-like road surface anti-shrink crack.
Detailed description of the invention
Fig. 1 is the construction process figure of the urban road water conservation temperature reduction composite pavement provided in this implementation.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
The invention discloses a kind of urban road water conservation temperature reduction construction of compound road surface methods, include the following steps:
S01 carries out traffic control to place to be paved, prevents vehicle from driving into；Place to be paved is cleared up, is checked to be paved
The closely knit situation of the sub-layer in place, it is ensured that it is closely knit all right, such as it is closely knit it is out of condition must add separation layer, by being held under
Brush multilayer pitch forms separation layer on layer；Sub-layer is cleaned, is blown clean with forest fire extinguisher, the serious portion of local pollution
Divide and be rinsed with waterwheel, then spray sticking layer oil, sticking layer oil is emulsified asphalt, is carried out by pitch sprinkling car to sticking layer oil equal
Even sprinkling, viscous wheel phenomenon occurs for sticking layer oil in order to prevent, and sticking layer oil need to be completed in the previous day spread to pave.
S02, the production of Asphalt mix for open-graded friction course, Asphalt mix for open-graded friction course are formed by mineral aggregate and asphalt mixing, empty
Gap rate is controlled in 20%-28%, and asphalt content is in 3.0%-4.5%；When the heating temperature and mix of palpus strict control mixture
Between, for the heating and temperature control of pitch at 150-170 DEG C, the heating temperature of mineral aggregate is 10-20 DEG C higher than the heating temperature of pitch；Mixing
The duration of mixing of material is controlled in 30-50s；Asphalt is a kind of gap grading asphalt, in mixture when major part
Coarse aggregate, fine aggregate is seldom, and oilstone is smaller, and the performance of mixture is very sensitive to bitumen aggregate ratio, when mixture bitumen aggregate ratio is less than
When 0.2% or more design value, the intensity for rolling rear mixture can be greatly reduced, cause it is subsequent can not grouting construction, constructing
Cheng Zhongying carries out detection bitumen aggregate ratio by Marshall method, and bitumen aggregate ratio should be strict controlled in design value ± 0.2%；
The place that paves, transport vehicle are transported using large tonnage self-discharging type transport vehicle after the completion of Asphalt mix for open-graded friction course mix
During transport, covered with tarpaulin；When Asphalt mix for open-graded friction course is transported to construction site, temperature inspection need to be carried out to it again
It surveys, mixing expects that the temperature at scene is strict controlled in 140-160 DEG C；
Asphalt mix for open-graded friction course construction, by big bituminous mixture laying in place to be paved, using wrong before and after two pavers
10-20m is opened, is carried out in echelon's mode is synchronous, width control that overlapped between two width avoids lane wheelmark in 30-60mm
Band, spreading speed is controlled in 1-3m/min, and should uniformly, uninterruptedly be paved, and must not arbitrarily be stopped in conversion rate and midway
, to improve flatness, reduce the isolation of mixture；After the completion of paving, using 12t steel roller start it is maximum ram vibration function into
Row vibroroller cmpacting 1-2 times；Then it is rolled 2-3 times using static pressure method；Finally, carrying out receipts light with the steel roller of < 7t；
S03, water-retentive cement mortar include cement, miberal powder, fine sand, water and water-retaining agent, and wherein water-retaining agent is industrial slag and diatom
The match ratio of soil, water-retentive cement mortar is cement: water: fine sand: miberal powder: industrial slag: diatomite=41.5:68.5:20:10:4:
2；Silane coupling agent is also mixed in water-retentive cement mortar, silane coupling agent is methyltrimethoxysilane；Water-retentive cement sand
Slurry is stirred in mix field with mixing building by the way of plantmix, and the charging sequence of each raw material is followed successively by cement, water conservation material
Other materials dry mixing should be closed 1-2min before the addition of the water, until uniformly, adding water and silane by material, fine sand, water, silane coupling agent
Mix 2-3min again after coupling agent, stirring is until material uniformity；Stirring is completed by cement concrete transport vehicle
Water-retentive cement mortar is transported to construction site, the rotation of tank body is kept during transport, in transit to avoid mortar
Precipitating；
Water-retentive cement mortar pours into, and water-retentive cement mortar is poured into Asphalt mix for open-graded friction course by water-keeping mortar sprinkling wagon
In gap, during pouring into, water-retentive cement mortar is stirred in sprinkling by mortar sprinkling wagon, prevents water-retentive cement sand
Fine deposition in slurry；
S04, the sprinkling of retarder after grouting, carry out sprinkling retarder by giant road pavement, retarder is liquid
Dew stone agent, dew stone agent fountain height control in 300 ± 15g/m2；After the completion of sprinkling, the cover film on road surface immediately is needed, and
It is compacted at the side of plastic foil, angle with wooden unit, in case plastic foil opening leads to moisture evaporation；
S05 is rinsed, plastic foil is removed, and artificial road pavement is scrubbed, and is aided with palm brush by the flushing of common water supplying pipe and is carried out
Scrub by non-condensing surface mortar rubbing, loosely becomes mud, and is washed away by water flow；
S06, health successively cover wet curing film, geotechnological felt, geotextiles, straw screen or mat, and uniform sprinkling number daily in road surface
It is secondary, so that covering bottom is remained dampness；
S07, quality testing and examination, according to Road Engineering Quality Checking And Evaluation standard (JTGF801-2004), " highway subgrade road
Face on-the-spot test ghost layer " (JTGE60-2008), standard specification for construction and acceptance of highway asphalt pavement (JIGF40-2004) require examined
It surveys and checks and accepts；After the completion of examination, traffic control is removed.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (10)
1. a kind of urban road water conservation temperature reduction construction of compound road surface method, which comprises the steps of:
S01 clears up place to be paved；
S02, Asphalt mix for open-graded friction course construction, by big bituminous mixture laying in place to be paved, before two pavers
After be staggered 10-20m, carried out in echelon's mode is synchronous, width control that overlapped between two width is in 30-60mm, spreading speed control
System is in 1-3m/min；After the completion of paving, the maximum vibration function that rams is started using 12t steel roller and is carried out vibroroller cmpacting 1-2 times；Then
It is rolled 2-3 times using static pressure method；Finally, carrying out receipts light with the steel roller of < 7t；
S03, water-retentive cement mortar pour into, and water-retentive cement mortar is poured into big gap pitch by water-keeping mortar sprinkling wagon and is mixed
In the gap of material；
S04, the sprinkling of retarder, after grouting, road pavement carries out sprinkling retarder；
S05, is rinsed, and road pavement is scrubbed；
S06, health successively cover wet curing film, geotechnological felt, geotextiles, straw screen or mat, and uniform sprinkling number daily in road surface
It is secondary, so that covering bottom is remained dampness；
S07, quality testing and examination.
2. a kind of urban road water conservation temperature reduction construction of compound road surface method according to claim 1, it is characterised in that: In
In the step S02, increase following steps:
S021, the production of Asphalt mix for open-graded friction course, Asphalt mix for open-graded friction course are formed by mineral aggregate and asphalt mixing, voidage
Control is in 20%-28%, and asphalt content is in 3.0%-4.5%；
S022, the transport of Asphalt mix for open-graded friction course are transported using large tonnage self-discharging type transport vehicle, and mixture reaches
The temperature of construction site is strict controlled in 140-160 DEG C.
3. a kind of urban road water conservation temperature reduction construction of compound road surface method according to claim 2, it is characterised in that: institute
It states in step S021, when Asphalt mix for open-graded friction course produces, the heating and temperature control of pitch is at 150-170 DEG C, the heating gathered materials
Temperature is 10-20 DEG C higher than the heating temperature of pitch；The duration of mixing of mixture is controlled in 30-50s.
4. a kind of urban road water conservation temperature reduction construction of compound road surface method according to claim 2, it is characterised in that: In
Bitumen aggregate ratio in the step S021 is controlled in design value ± 0.2%.
5. a kind of urban road water conservation temperature reduction construction of compound road surface method according to claim 1, it is characterised in that: In
In the step S03, the water-retentive cement mortar includes cement, miberal powder, fine sand, water and water-retaining agent, and wherein water-retaining agent is industry
The match ratio of slag and diatomite, the water-retentive cement mortar is cement: water: fine sand: miberal powder: industrial slag: diatomite=41.5:
68.5:20:10:4:2.
6. a kind of urban road water conservation temperature reduction construction of compound road surface method according to claim 5, it is characterised in that: institute
Water-retentive cement mortar is stated by the way of plantmix, is stirred in mix station-service mixing building, charging sequence is followed successively by cement, water conservation material
Other materials dry mixing is closed 1-2min to uniform between Jia Shui by material, fine sand, water, adds after water mix 2-3min again.
7. a kind of urban road water conservation temperature reduction construction of compound road surface method according to claim 5, it is characterised in that: institute
It states also added with silane coupling agent in water-retentive cement mortar, the silane coupling agent is methyltrimethoxysilane.
8. a kind of urban road water conservation temperature reduction construction of compound road surface method according to claim 1, it is characterised in that: institute
State the dew stone agent that the retarder in step S04 is liquid.
9. a kind of urban road water conservation temperature reduction construction of compound road surface method according to claim 8, it is characterised in that: institute
The fountain height for stating dew stone agent is controlled in 300 ± 15g/m2。
10. a kind of urban road water conservation temperature reduction construction of compound road surface method according to claim 1, it is characterised in that:
Increase following steps in the step S04:
S041 covers health, after road surface plastic covering film, plastic covering film, is pressed sternly at the side, angle of plastic foil with wooden unit
It is real, in case plastic foil opening leads to moisture evaporation.
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| CN113188663A (en) * | 2021-03-29 | 2021-07-30 | 广东云津工程建设有限公司 | Construction process and quality control method for semi-flexible pavement |
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| CN113188663A (en) * | 2021-03-29 | 2021-07-30 | 广东云津工程建设有限公司 | Construction process and quality control method for semi-flexible pavement |
| CN113188663B (en) * | 2021-03-29 | 2024-01-09 | 广东云津工程建设有限公司 | Semi-flexible pavement construction process and quality control method |
| CN113756148A (en) * | 2021-10-21 | 2021-12-07 | 启东通启工程试验检测有限公司 | Construction method of pouring type composite pavement |
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