Company profile

Guangzhou Free Trade Zone Yizhuang Trading Co., Ltd. was established in 2000.，The registered capital is RMB 26.88 million.。Since the establishment of the company，Engaged in mechanical and electrical equipment related to national infrastructure and key projects、Agent of chemical raw materials。

Model one、S1800-3SJFogler Synchronous Spraying and Thin Layer Paving Technology Helps Guangzhou Conghua Beautiful Village Construction

Every holiday，A bus、China and Pakistan carried tourists into the characteristic towns of Conghua.；Trucks loaded with agricultural products drove out of the Conghua mountain area.，Drive to the city and the farmers' market。Conghua district，It is located in the northeast of Guangzhou，Known as“The Pearl on the Tropic of Cancer”And“Back Garden of Guangzhou”Reputation。

 

In recent years，Conghua takes rural roads as a link，Connecting the city and the countryside；In order to operate rural roads well，Conghua is prominent“Construction, management, maintenance and transportation”，Comprehensively promote the construction of rural roads、Administration、Curing、Operation coordination and sustainable development。Vogler Super 1800-3 SJ Spraying Paver Successfully Used in Aotou Town of ConghuaXMunicipal reconstruction project of section from 286 Zuocun to Longxing，Contribute to the construction of beautiful countryside in Conghua。

1、Project overview

This project is a cement concrete pavement reconstruction project.，The countryside around the road is beautiful.、Litchi is fragrant，Villages on both sides、Farmland、Fruit trees alternate with each other。The old road is cement concrete pavement.，Double-layer synchronous thin layer is adopted in this transformation.：2.5 cm GT5 Stress absorbing layer+1.5 cm GT10 High-toughness ultra-thin asphalt wearing course，Nable it to become a material with superior crack resistance,、High performance asphalt surface course with impermeability and skid resistance，It can effectively improve the smoothness of road surface.，Reduce driving noise，And that drive comfort is improved。

Synchronous thin layer paving：Preventive pavement maintenance technology，Will be 12~25 mm Thick modified hot asphalt mixture，Pave on a layer of polymer modified emulsified asphalt tack coat oil using a dedicated Vogler spray paver，That is, the spraying of emulsified asphalt and the paving of hot asphalt mixture are carried out simultaneously.，A kind of construction technology of once forming of road surface after compaction by road roller。

2、Construction process

2.1 Preparation of old pavement

Use Wittgen first W Roughening of the original cement concrete pavement by 195 large milling machine。

  

Milling residue on the surface shall be cleaned.，The cracks were repaired by pouring treatment.，Anti-crack paste shall be pasted on the part with wide crack，Anti-crack paste shall also be pasted at the longitudinal joint of concrete plate in advance.。

 

  

2.2 Construction of stress absorbing layer

Using the Vogler Super 1800-3 SJ The spray-type paver is used to pave the stress-absorbing layer on the pretreated cement concrete slab.。While finishing the spraying of the modified emulsified asphalt tack coat,，The synchronous paving thickness is 2.5 cm Yes GT5 Stress absorbing layer。

  

  

Super 1800-3 SJ Spray type paver pulse spray mode can meet the design requirements of 0.8 kg/m² Accurately control the spraying amount of modified emulsified asphalt，And ensure that the sprayed tack coat will not be damaged or polluted before paving the asphalt mixture.，The reliable bonding effect of the stress absorbing layer is ensured。

  

Two Hummer tandem vibratory rollers were used for the rolling of the stress-absorbing layer HD O 128 V And a small Hummer tandem roller. HD 12 Done。

 

  

  

2.3 Construction of ultra-thin wearing course

After the construction of stress absorbing layer is completed，Construction of ultra-thin wearing course after temporary traffic opening for about one month。Also use the Vogler Super 1800-3 SJ Spray-type paver shall pave the stress-absorbing layer with a thickness of 1.5 cm Yes GT8 High-toughness ultra-thin wear layer，Spraying amount of modified emulsified asphalt is 0.6 kg/m²。

 

Use Wittgen for transverse joints between construction sections W 50 H The milling machine is preconditioned to ensure smoothness.。

  

The rolling of the ultra-thin wearing course is still carried out by two Hummer double-drum oscillating rollers. HD O 128 V And a small Hummer tandem roller. HD 12 Completed together。

  

  

3、Benefit analysis

3.1 Excellent performance

Compare to conventional wearing course，High-toughness ultra-thin wear layer with excellent crack resistance、Impermeability and skid resistance，It can effectively improve the smoothness of road surface.，It also improves the safety of residents and the comfort of driving.。

GT5 Stress absorbing layer and GTThe high-toughness and ultra-thin asphalt wearing course is made of high-viscosity and high-elasticity modified asphalt，The oil-to-stone ratio is as high as about 8.0%，The anti-cracking performance of the asphalt mixture far exceeds that of the conventional asphalt mixture.，Superior durability and long service life can be obtained even when the overlay is directly applied to cement concrete pavement。

3.2. Green environmental protection

Because that thickness of the thin lay is greater than that of the conventional asphalt wear course 4, cm The thickness should be small.，Therefore, valuable building materials such as asphalt and aggregate can be greatly saved，At the same time, it can reduce construction energy consumption and carbon emissions.。

Ultra-thin wearing layer can greatly reduce driving noise（Compared with the original cement concrete pavement, the noise level can be reduced by 5～7 dB），Reduce the noise pollution caused by driving for the surrounding residents。

3.3. Efficient and fast

Due to the thin thickness of the ultra-thin wear layer,，Therefore, the paving speed is faster than the traditional asphalt layer.（The spreading speed of the stress absorbing layer in this project is about 8 m/Minute，The ultra-thin wearing course has a spreading speed of more than 10 m/Minute，While the paving speed of a normal asphalt layer is usually 3~4 m/Minute），Compaction work and compaction passes are less than traditional asphalt layer，Therefore, the construction speed is faster than the traditional asphalt layer.。

At the same time, because the thickness is thin,，Its heat dissipation is faster.，Open traffic is also faster than a conventional asphalt layer.。This also means that the disturbance to the surrounding residents is reduced.，Especially on the main street of the town.，There are many intersections，There are many shops，The adverse effects of the construction of the ultra-thin wearing layer on the lives of residents can also be greatly reduced.。

Wei has something to say

Vogler Super 1800-3 SJ Spray-type paver，Its most important feature is that the spraying of emulsified asphalt and the paving of asphalt mixture can be carried out simultaneously.，Ensure that the sprayed tack coat will not be damaged or contaminated prior to spreading of the bituminous mixture，Thereby ensuring the bonding effect of the bonding layer.，This is the most critical link to determine the construction quality of ultra-thin wearing course.。

In addition，But also avoid that damage caused by the roll of the skip tire and the crawler of the paver during the construction of the asynchronous method.，But also doe not need to be pave after that emulsified asphalt is demulsified.，More efficient construction。

 

The rural road reconstruction project in Conghua, Guangzhou，Vogler Super 1800-3 SJ The spray-type paver is constructed in cooperation with the road construction equipment belonging to the WIRTGEN and HUMMER brands of the WIRTGEN Group.，Each performs its own duties，Efficient collaboration，To build“Sihao Rural Road”Excellent projects have made a good demonstration.。

Model two、W 380 CR For the first time, the cold recycling machine has been successfully applied to the maintenance project of two provincial roads in Guangxi.

Compared with the traditional milling and paving scheme,，Wittgen W 380 CR Low carbon and environmental protection of cold in-place recycling construction technology、It has outstanding advantages in construction efficiency and other aspects.。In recent years, it has been successfully applied in many pavement maintenance projects in China. W 380 CR Has very wide applicability and excellent application effect.。

Based on synchronous paving W 380 CR Cold in-place regeneration proces，Basic regeneration width 3.8 m, Cooperative operation of multiple equipment，Diversified construction modes，The application is flexible and efficient。Except single-lane single-layer cement cold in-place recycling construction or single-layer foamed asphalt cold in-place recycling construction，It can also implement double-layer cold regeneration in place for the road sections with serious damage depth.，That is to say, the surface course is cold regenerated on the spot with foamed asphalt.，At the same time, the cold regeneration of cement in situ is carried out on the base course.，Achieve synchronous maintenance of two structure layer。

In addition，When the required regeneration width is greater than 3.8 m And less than 5.8 m Time，It can also be realized by side pre-milling. W 380 CR Cold recycling units are constructed in different working widths。Since mid-November 2022，Wittgen W 380 CR The cold regeneration unit is constructed in this mode.，Successively in Guigang City, GuangxiS204 Pavement Medium Repair Project and Yulin CitySThe successful application of 205 in asphalt pavement overhaul project。

 

1、S204 Pavement medium repair works

1.1 Project overview

This project belongs to the pavement maintenance project of ordinary national and provincial highways in Guangxi.，The starting point is near Ma Lian Township, Pingnan County, Guigang City.，The destination is near Fangtiantun.，Maintenance mileage 7.316 km。

This section is mainly cracked.、Blocky crack、Longitudinal crack、Transverse crack、Rutting and other pavement diseases，The medium repair project only reconstructed the original pavement structure layer and ancillary facilities.，To improve road capacity，Improve the traffic appearance of villages and towns along the line，And to better serve the residents along the line.。

1.2 Application scheme

Firstly, local disease treatment is carried out on the original pavement base.，And then use W 380 CR On the original 7 cm On-site cold regeneration of foamed asphalt for asphalt pavement，Generate 8 cm Thick cold recycled layer of foamed asphalt is used as the lower surface layer，Finally, add 3 on top.5 cm Thick AC-13 Upper layer of asphalt concrete。

 

1.3 Construction process

W 380 CR The basic regeneration width of the cold regenerant was 3.8 m，One lane can be regenerated in situ at a times，This project has received the pre-milling cooperation of a milling machine，So that that reproduction width reach 4.5 m，Thereby reducing longitudinal construction joints.，The cut down mode of the milling and mixing rotor also optimizes the particle shape of the cut material，The gradation of the recycled mixture is improved，So that that high quality of the construction is ensure。

W 380 CR The cold recycling machine cuts and crushes the old pavement material on the spot.，Add the foamed bitumen and water through a spray bar placed on the milling cover，And the cement pre-spread on the old road surface is stirred together，Because the milling and mixing rotor adopts a spiral structure,，The recycled material gathers towards the center。

The cold recycled material is then conveyed by a conveyor belt to the following Vogler paver hopper，Paving by paver，The foam asphalt cold recycling layer is rolled and formed by a Hummer road roller。The whole construction process adopts flow operation.，Only one lane is occupied，The opposite lane can be released normally.。

 

2、S205 medium repair works of pavement

2.1 Project overview

This project belongs to the project of improving the service capacity of Guangxi general national and provincial trunk highways in the new western land-sea corridor.，The project is 10 meters away from Beiliu City km，Distance to Yulin City: 108 km，Total length of the project route: 11.659 km。

In recent years, with the rapid development of regional economy,，Traffic volume and overweight vehicles are increasing year by year.，As a result, pavement diseases continue to occur.，Road conditions are deteriorating.，There are mainly massive cracks on the original pavement.、Pavement diseases such as rutting and more longitudinal and transverse cracks，It seriously affects the safe operation and driving comfort of the highway.，As a result, the cost of highway maintenance and the cost of social vehicle operation are increasing.。

The implementation of this project will improve the traffic capacity of the regional road network.，Improve the investment environment along the line，To provide a broader space for Yulin's investment environment.。

2.2 Application scheme

Direct use W 380 CR On the original 8 cm Bituminous surfacing and 4 cm Cold in-situ regeneration of graded crushed stone base with foamed asphalt，Generate 13 cm Thick foamed asphalt cold regeneration layer，Finally, add 8 on top. cm ATB-25 asphalt macadam underlayer and 4 cm ARAC-16 Upper layer of rubber asphalt concrete。

 

2.3 Construction process

The project adopts half-width construction.，Construction organization scheme for half-width passage，The half-width construction width is 4.5 m，Exceeded W 380 CR The width of the basic recycling operation，Therefore, it is necessary to adopt the side pre-milling and widening construction technology.。

A Wittgen medium milling machine was used in advance for the project. W 125 CF，Milling the ultra-wide old pavement material within the regeneration depth，Milling and planing materials are temporarily placed in W 380 CR In the working area of。W 380 CR The remaining width of the old pavement material is then milled and crushed，Meanwhile, the pre-milling materials are mixed together to form a uniform cold recycling mixture，Delivered to the rear Vogler paver hopper。

The Vogler paver mixes the evenly mixed cold recycled mixture to the full recycled width of 4.5 m Carry out paving，Finally, it is rolled and formed by a Hummer roller. cm Thick foamed asphalt cold regeneration layer。

After the emulsified asphalt tack coat is sprayed on the surface of the cold recycling layer and the emulsified asphalt is demulsified, the traffic is temporarily opened.，Minimize disruption to traffic。

Complete dense core sample taken out after construction。

3、W 380 CR Advantages of cold in-place recycling construction technology

3.1 Low cost：100%Recycling old pavement material，Reduce the use of new materials；Way of on-site regeneration，Reduce the cost of round-trip transportation of materials；And carry out at normal temperature.，Cost reduction in fuel consumption；

3.2. High efficiency：One lane can be regenerated at one times，And that mil is completed at the same time.、Broken、Addition of foamed bitumen and water、Mixing and other processes，And use a synchronized paving proces，Improve construction efficiency，The construction period can be shortened；

3.3 Good quality：The undercutting method is adopted，Ensure the gradation of recycled material，At the same time, due to the use of pavers to pave recycled materials.，Flatness of cold regeneration layer、Thickness, cross slope and other indicators can be accurately controlled.；

3.4. Less pollution：Due to significant reduction in fuel consumption，Thereby greatly reducing carbon dioxide emissions.，There is data to show that，At least 80% less%Carbon emissions。

Wei has something to say

W 380 CR The construction efficiency of the cold recycling machine is about 8000~10000 m²/God，May be shortened by at least 1/3 Construction period；At the same time, it only needs to close half of the width for construction.，Traffic can be temporarily opened after the cold recycling layer is compacted and the emulsified asphalt tack coat is spread.，Reduce interference to surrounding traffic；And the quality of the cold regeneration section temporarily opened to traffic is stable.，Therefore, it has won the praise of owners and construction units.。

The successful application in Guangxi Province Road Maintenance Project，It's a good start.，This low carbon、Environmental protection、The efficient maintenance method of asphalt pavement will have a broader application prospect in Guangxi。

Model three、Reduce your carbon footprint - Wirtgen medium milling machine W 185 CFi Show one's skill at the maintenance site

According to Industrial Research Institute of China Research Institute《2022-Report on Competition Analysis and Development Forecast of China's Highway Maintenance Industry in 2026》Analysis，At present，China's road network has basically taken shape.，Large-scale construction will inevitably bring heavy maintenance tasks.。According to the Ministry of Transport，By the end of 2021，Highway maintenance mileage 525.160,000 km，Accounting for 99% of the total highway mileage.4%，Close to 100%，It shows that the coverage level of highway maintenance in China is high at present.。

Complete routine maintenance operations efficiently and economically、Reduce the carbon footprint of construction，It is placed in road maintenance.、A major issue facing maintenance and construction enterprises。

The field of construction machinery “Fourth National Emission Standard“ Full implementation，Wittgen “Medium-sized milling machine series”：W 125 / 155 / 185 CFi Came into being，While filling the gap in the performance of the traditional milling fleet，But also provides one more option for completing the daily maintenance milling operation of medium scale more economically.。

W 185 CFi It is the model with the widest milling width in the medium milling machine series.，The standard milling drum is 1.9 m。Compared to his brother from the same school. W 155 CFi 1 of.5 m For wide milling drum，Wider milling width Surface milling in daily maintenance operation、Significantly improve efficiency in applications such as cement napping。In this issue, Xiaowei will take you to see several recent application cases.：

1、Partial maintenance of single lane of expressway

1.1 Site overview

Location：G15 Shenhai Expressway；

Application：Local rapid milling repair of permeable asphalt pavement；

Milling depth：4 cm；

Milling width: Single lane 3.75 m。

1.2 highlights

  

 W 185 CFi Medium-sized milling machine with compact size，It can be transported to the construction site by sharing a trailer with the supporting sliding sweeper.

This not only saves freight.，It can also reduce the emissions of one trailer.，Milling machine in working condition，With oil、Water，It can be put into construction at the construction site.。

  

Single person operation，Efficient milling

The actual milling speed on site is 11 m/min，This milling speed is used to accommodate the skip and to ensure a high quality milling textured。You can imagine，If a large milling machine is used，Under the same restrictions，Its milling efficiency will also be limited to this level.。

In this construction site, the medium milling machine is used to complete the same milling work with the same efficiency.，The fuel consumption is greatly saved.，Reduce carbon emissions。W 185 CFi Standard 1.9 m Wide Milling Drum，Two knives can just complete the milling of a single lane.，On the efficiency of milling width，Reached 2 m The level of the milling machine。

  

 0.5 m A curb seat belt.，A Wittgen half-meter milling machine is used. W 50 H Welt milling，Finish it beautifully once. ”Milling flash”

  

W 185 CFi Flat、Beautifully textured milled surfaces，It provides a high-quality foundation for the subsequent paving process.

2、Municipal cement pavement“White to black”Pull hair

2.1 Site overview

Location：Municipal Road, Xinyi City, Maoming

Application：“White to black”Cement napping

Milling depth：6 mm

2.2 highlights

  

Front discharge milling machine，It is very suitable for the construction environment of municipal roads。Milling speed up to 30 m/min

  

In order to accommodate the crown in the middle of the road，The milling width on each side is 2.9 m,  This also requires two cuts to cover half the milling width of the road。We can imagine，If 2 is used m A large milling machine，To accommodate the road hump，The number of milling cutters can not be less.。A medium milling machine is used，From the perspective of fuel consumption and cost，It's a very wise choice.。

  

Right Offset Milling Drum，40 cm The overhang of，O that the welt milling is also very easy to control.。In this field application，There is no need to call one more half-meter milling machine for edge milling.。

  

 The roads of small towns are winding and undulating.，W 185 CFi Always with ease

  

7.Total construction time of 5 hours，The 11521 was completed m² The napping；And the fuel consumption is only 110 L。Average hourly fuel consumption as low as 14.7 L/h。

Such a site may use 2. m The large milling machine can keep up with the skip.，Can be slightly advanced by 1~1.5 hours to complete，But the fuel consumption is roughly doubled.。This is not only an economic saving.，But also make outstanding contributions to energy conservation and emission reduction.。

  

Wittgen “Delta 18” High performance milling drum，HT22 Plus Tool apron，Ensure the optimum angle and positioning of the tool，Perfect rotation of the cutter head，Reduced resistance during operation，At the same time, the wear rate of the tool is delayed.，Reduce the cost of milling tools。

Xiaobian has something to say

Through the above two practical site applications，It can be seen that under suitable construction application，Choose the most suitable model，Not only can higher benefits be obtained in terms of economic benefits,；What's more,，In terms of social benefits, it can also be “Double carbon target” Make a contribution。