冷再生路拌机作为一种、的路面修复设备，通过铣刨、破碎、拌合及摊铺一体化作业，实现旧沥青路面材料的再生利用。其施工要点涵盖设备选型、工艺控制、质量检测及措施四大核心环节，直接决定工程效率与路面性能。

　　As an efficient and environmentally friendly road surface repair equipment, the cold recycling road mixer achieves the recycling of old asphalt pavement materials through integrated operations of milling, crushing, mixing, and paving. The key points of its construction include equipment selection, process control, quality inspection, and environmental protection measures, which directly determine the efficiency of the project and the performance of the road surface.

　　一、设备选型与调试

　　1、 Equipment selection and debugging

　　机型匹配原则：根据工程规模、旧路结构及再生深度选择设备。例如，小型冷再生机适用于村道维修，而大型设备可处理高速公路基层，铣刨宽度覆盖2-4米，深度可达50cm。

　　Model matching principle: Select equipment based on project scale, old road structure, and regeneration depth. For example, small cold recycling machines are suitable for village road maintenance, while large equipment can handle highway base layers, with milling widths covering 2-4 meters and depths up to 50cm.

　　刀头与刀库配置：针对旧沥青路面或水泥稳定基层，需选用不同材质刀头。例如，硬质合金刀头适用于高强度基层，而镶齿刀头则更适合沥青路面铣刨。

　　Knife head and knife magazine configuration: Different materials of knife heads need to be selected for old asphalt pavement or cement stabilized base. For example, hard alloy cutting heads are suitable for high-strength substrates, while toothed cutting heads are more suitable for milling asphalt pavement.

　　核心部件检查：施工前需校验铣刨鼓转速、拌合叶片角度及行走速度，确保再生料级配符合设计要求。

　　Core component inspection: Before construction, it is necessary to verify the milling drum speed, mixing blade angle, and walking speed to ensure that the gradation of recycled materials meets the design requirements.

　　二、施工工艺控制

　　2、 Construction process control

　　旧路预处理：

　　Pre treatment of old roads:

　　路面杂物，对严重车辙或裂缝进行预铣刨，确保再生层厚度均匀。

　　Remove road debris, pre mill severe ruts or cracks to ensure uniform thickness of the regeneration layer.

　　采用雷达探测技术识别地下管线，避免施工损伤。

　　Using radar detection technology to identify underground pipelines and avoid construction damage.

　　添加剂精准投放：

　　Accurate addition of additives:

　　根据旧料级配及含水率，计算水泥、乳化沥青或泡沫沥青的掺量。例如，水泥剂量通常控制在旧料质量的1.5-3%。

　　Calculate the amount of cement, emulsified asphalt or foam asphalt according to the old material gradation and water content. For example, the cement dosage is usually controlled at 1.5-3% of the old material quality.

　　采用计算机控制系统实现添加剂的连续、均匀喷洒，误差控制在±0.5%以内。

　　Using a computer control system to achieve continuous and uniform spraying of additives, with an error controlled within ± 0.5%.

　　拌合与整平：

　　Mixing and leveling:

　　控制铣刨速度与拌合深度，确保再生料混合均匀。

　　Control milling speed and mixing depth to ensure even mixing of recycled materials.

　　使用平地机进行初步整平，再通过再生机自带螺旋布料器实现二次精平。

　　Use a grader for preliminary leveling, and then achieve secondary precision leveling through the built-in spiral feeder of the recycling machine.

　　碾压工艺：

　　Rolling process:

　　初压采用钢轮压路机静压1-2遍，复压使用振动压路机振压3-4遍，终压以胶轮压路机收面。

　　The initial compaction uses a steel wheel roller for 1-2 passes of static pressure, the secondary compaction uses a vibrating roller for 3-4 passes of vibration, and the final compaction uses a rubber wheel roller for finishing.

　　碾压温度需控制在80-110℃，避免低温下压实度不足。

　　The compaction temperature should be controlled between 80-110 ℃ to avoid insufficient compaction at low temperatures.

　　三、质量检测与验收

　　3、 Quality inspection and acceptance

　　过程检测：

　　Process detection:

　　实时监测再生料含水率、级配及添加剂掺量，确保符合JTG/T 5521-2019《公路沥青路面再生技术规范》。

　　Real time monitoring of moisture content, gradation, and additive dosage of recycled materials to ensure compliance with JTG/T 5521-2019 "Technical Specification for Highway Asphalt Pavement Recycling".

　　采用核子密度仪检测压实度，每200米检测1处，合格率需达95%以上。

　　Using a nuclear density meter to detect compaction, one point should be tested every 200 meters, and the pass rate should be above 95%.

　　成品验收：

　　Finished product acceptance:

　　钻芯取样检测再生层厚度、强度及平整度。

　　Drill core sampling to detect the thickness, strength, and flatness of the regeneration layer.

　　进行弯沉试验及渗水系数测试，确保路面承载力与耐久性达标。

　　Conduct deflection tests and permeability coefficient tests to ensure that the road surface's bearing capacity and durability meet the standards.

　　防护：

　　Security protection:

　　设置警示标志与导流设施，作业区封闭管理。

　　Set up warning signs and diversion facilities, and implement closed management of the work area.

　　操作人员需佩戴防尘口罩、耳塞及帽，定期接受设备操作培训。

　　Operators are required to wear dust masks, earplugs, and safety helmets, and receive regular equipment operation training.

　　四、特殊工况应对策略

　　4、 Special working condition response strategy

　　低温施工：

　　Low temperature construction:

　　当环境温度低于10℃时，需采用温拌添加剂或对旧料进行预热处理。

　　When the ambient temperature is below 10 ℃, warm mix additives or preheating treatment of old materials should be used.

　　缩短再生料从拌合到碾压的时间，避免温度散失过快。

　　Shorten the time from mixing to rolling of recycled materials to avoid rapid temperature loss.

　　高含水率旧料：

　　High moisture content old materials:

　　通过翻晒或掺入干料调整含水率，确保再生料处于压实状态。

　　Adjust the moisture content by flipping or adding dry materials to ensure that the recycled material is in the best compacted state.

　　交通导改：

　　Traffic modification:

　　采用半幅施工、半幅通车方案，通过锥形标、水马等设施划分作业区。

　　Adopting a half width construction and half width traffic plan, the work area is divided by facilities such as conical markers and water horses.

　　冷再生路拌机施工需构建“设备-工艺-检测-”四位一体管控体系，通过精细化操作与实时监测，确保再生路面质量。随着绿色公路建设理念的深化，冷再生技术将向“智能化控制、全深度再生、多材料适配”方向发展，为道路维修提供更、可持续的解决方案。

　　The construction of cold recycling road mixer requires the establishment of a four in one control system of "equipment process testing environmental protection", which ensures the quality of recycled road surface through refined operation and real-time monitoring. With the deepening of the concept of green highway construction, cold recycling technology will develop towards "intelligent control, full depth recycling, and multi material adaptation", providing more efficient and sustainable solutions for road maintenance.

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