The width of the cold regeneration machine for crushing and mixing is 2.4 meters. During operation, a water tank truck should closely follow the operation to ensure the mixing water. During the mixing process, the water should be controlled according to the 1-2% higher than the optimal water content specified in the test sheet (provided that the regeneration machine needs to open several water nozzles to convert the water content). Another water tank truck needs to be full of water and always on standby. Once the water tank working with the regeneration machine runs out of water, it needs to be immediately replenished. To ensure the continuous operation ability of cold revitalization. The travel speed of the cold recycling machine should be adjusted based on the damage condition of the road surface and the depth of regeneration, generally ranging from 6m/min to 12m/min, so that the fluctuation range of the material grading after milling is not large. In areas with severe mesh cracks, the travel speed of the regeneration unit should be reduced and the speed of the milling rotor should be increased. If the thickness of the structural layer of the old road surface is greater than 8cm and it is difficult for the cold recycling machine to move, it is necessary to first mill and plane the old road surface layer with the cold recycling machine, and then lay cement on the crushed material for cold recycling mixing construction. During the cold regeneration process, personnel are required to follow and check the mixing depth and humidity at any time, usually around 20 meters. If there are any nonconformities, they should be reported to the driver in a timely manner for resolution. During each cold recycling construction operation, the vibrating roller must follow the cold recycling machine at a distance of 20m behind it. The mixed mixture should be promptly compacted with high amplitude and low frequency vibration, with a speed equivalent to the driving speed of the cold recycling machine. The purpose is to seal the water in the mixture when the water content is optimal.

再生施工時應(yīng)考慮兩種接縫：與道路中心線平行的縱向接縫和與道路中心線垂直的橫向接縫。

Two types of joints should be considered during regeneration construction: longitudinal joints parallel to the road centerline and transverse joints perpendicular to the road centerline.

縱向接縫：再生機(jī)的工作寬度一般小于道路或行車道的寬度，因此，全幅路的冷再生需多次作業(yè)，從而導(dǎo)致和相鄰作業(yè)面間的縱向接縫。需要沿整條縱縫有一定的重疊量以保證相鄰作業(yè)面間縱縫的連續(xù)性。相鄰作業(yè)面間的重疊量不小于10cm。路面越厚，重疊量越大；材料粒徑越粗，重疊量越大；相鄰兩次作業(yè)間隔12h以上時，重疊量應(yīng)增加。在縱向接縫上，根據(jù)已建再生層的完成時間，改變水的噴入量?？v向接縫的位置應(yīng)盡量避開緩慢行駛的重型車輛的輪跡。施工時應(yīng)通過在現(xiàn)有路面上醒目標(biāo)志或測量基準(zhǔn)線的方法建立導(dǎo)向提示，幫助駕駛員正確操縱再生機(jī)，避免相鄰作業(yè)面間存在未拌合的的夾生帶。

Longitudinal joint: The working width of the recycling machine is generally smaller than the width of the road or carriageway, therefore, the cold recycling of the full width road requires multiple operations, resulting in longitudinal joints between adjacent working surfaces. It is necessary to have a certain amount of overlap along the entire longitudinal seam to ensure the continuity of the longitudinal seam between adjacent working surfaces. The overlap between adjacent work surfaces shall not be less than 10cm. The thicker the road surface, the greater the overlap; The coarser the material particle size, the greater the overlap; When the interval between two adjacent assignments is more than 12 hours, the overlap should be increased. On the longitudinal joint, change the amount of water sprayed according to the completion time of the existing regeneration layer. The position of the longitudinal joint should avoid the wheel tracks of slow moving heavy vehicles as much as possible. During construction, guidance prompts should be established by prominently marking or measuring reference lines on the existing road surface to help drivers operate the recycling machine correctly and avoid unmixed entrainment between adjacent working surfaces.

橫向接縫：因每次施工開始或終止而形成的橫向接縫是不連續(xù)的。每次停機(jī)，即使是僅需幾分鐘用于更換罐車、刀頭，也將形成一個嚴(yán)重影響再生材料均勻性的橫縫。因此施工中盡量減少停機(jī)現(xiàn)象，在不可避免的情況下，應(yīng)對所形成的橫縫進(jìn)行重疊認(rèn)真處理。處理橫向接縫時需要注意含水量，一般起刀落刀時含水量按正常減半。再生施工開始時，所有開始步驟必須嚴(yán)格依次進(jìn)行，特別是水管的排氣程序。所有氣體必須在水到達(dá)噴灑桿前排除，如果排氣不當(dāng)，有可能在再生施工開始的初幾米內(nèi)，混合料內(nèi)無水，從而導(dǎo)致路面內(nèi)出現(xiàn)非穩(wěn)定路段。在臨時停機(jī)后重新開始時，整個再生機(jī)組應(yīng)該后退少一個轉(zhuǎn)子直徑的距離既1.5-2米到達(dá)再生過的材料上。這將保證開始施工后所有材料均得到處理。停機(jī)超過水泥初凝時間，再生機(jī)再次施工時，必須將整個再生機(jī)后退再生過的路段1.5m的距離，并重新撒布水泥。橫縫問題只有當(dāng)施工停止時才會出現(xiàn)。因此，再生機(jī)組好只能在罐車用空后或類似情況下才能停機(jī)。施工中盡量減少停機(jī)現(xiàn)象，好在每打完一段整幅路后再更換刀頭，以不影響后續(xù)工序的展開。

Transverse joint: The transverse joint formed by the start or end of each construction is discontinuous. Each shutdown, even if it only takes a few minutes to replace the tanker and blade, will form a serious transverse seam that affects the uniformity of the recycled material. Therefore, during construction, the phenomenon of downtime should be minimized as much as possible. In unavoidable cases, the horizontal joints formed should be carefully overlapped and treated. When handling transverse joints, it is necessary to pay attention to the water content. Generally, the water content should be reduced by half when starting and falling the knife. At the beginning of regeneration construction, all starting steps must be strictly followed in sequence, especially the exhaust procedure of the water pipe. All gases must be expelled before the water reaches the spray bar. If the exhaust is not done properly, there may be no water in the mixture within the first few meters of regeneration construction, leading to unstable road sections on the road surface. When restarting after a temporary shutdown, the entire regeneration unit should retreat at least one rotor diameter distance of 1.5-2 meters to reach the regenerated material. This will ensure that all materials are processed after the start of construction. If the shutdown exceeds the initial setting time of the cement, and the regeneration machine is being constructed again, the entire regeneration machine must be retreated to a distance of 1.5m from the regenerated road section and the cement must be re spread. The problem of transverse joints only occurs when construction stops. Therefore, the regeneration unit can only be stopped after the tank truck is empty or in similar situations. During construction, minimize downtime as much as possible, and preferably replace the cutting head after completing each section of the entire road to avoid affecting the subsequent process.

再生拌和均勻后應(yīng)色澤一致，沒有灰條、灰團(tuán)和花面，即無明顯粗細(xì)料離析現(xiàn)象，且水分合適、均勻。每天冷再生施工結(jié)束時清洗刀頭一定要遠(yuǎn)離當(dāng)日施工段的路面進(jìn)行，以防止洗刀水流入剛打完的路面結(jié)構(gòu)中造成人為軟基。

After the regeneration and mixing are uniform, the color should be consistent, without gray bars, clusters, or flower surfaces, that is, there should be no obvious segregation of coarse and fine materials, and the moisture should be appropriate and uniform. At the end of cold recycling construction every day, the cleaning of the blade must be carried out far away from the road surface of the construction section on that day to prevent the water flow of the blade from entering the newly completed road structure and creating a soft foundation.