冷再生机作为道路施工的多功能设备，在处理含水泥材料的工程中能否发挥作用，需结合其工作原理、设备配置及施工工艺综合判断。这类设备通过破碎、拌和、再生等工序，可对水泥相关材料进行合理处置，但其应用效果与操作规范紧密相关。

　　As a multifunctional equipment for road construction, whether the cold recycling machine can play a role in the treatment of cement containing materials requires a comprehensive judgment based on its working principle, equipment configuration, and construction technology. This type of equipment can dispose of cement related materials reasonably through processes such as crushing, mixing, and regeneration, but its application effect is closely related to operating standards.

　　冷再生机处理水泥的核心场景，集中在旧水泥混凝土路面再生与水泥稳定类基层施工两大领域。在旧水泥路面改造中，冷再生机可将破损的水泥混凝土板块破碎至一定粒径（通常控制在 30-50 毫米），并与新添加的集料、水泥、粉煤灰等材料均匀拌和，形成再生混合料。这种工艺适用于低等级道路基层或底基层施工，既能消耗废旧水泥块，又能减少新材料用量。例如，某省道改造项目中，冷再生机将废弃水泥路面破碎后，按 1:9 比例掺入新水泥，经拌和压实后，基层强度满足设计要求（7 天无侧限抗压强度≥3.5MPa）。

　　The core scenarios of using cold recycling machines to process cement are focused on two major areas: the regeneration of old cement concrete pavement and the construction of cement stabilized base layers. In the renovation of old cement pavement, the cold recycling machine can crush damaged cement concrete slabs to a certain particle size (usually controlled at 30-50 millimeters), and mix them evenly with newly added aggregates, cement, fly ash and other materials to form a recycled mixture. This process is suitable for the construction of low-level road base or subbase, which can consume waste cement blocks and reduce the amount of new materials used. For example, in a provincial road renovation project, the cold recycling machine crushes the abandoned cement pavement and mixes it with new cement in a ratio of 1:9. After mixing and compacting, the base strength meets the design requirements (7-day unconfined compressive strength ≥ 3.5MPa).

　　在水泥稳定土或水泥改良土施工中，冷再生机可实现水泥与土的高效拌和。设备通过旋转刀辊将原路面或路基土破碎，同时喷洒定量水泥浆（水泥用量通常为 5%-8%），边破碎边拌和，确保水泥与土颗粒均匀接触。这种工艺常用于公路基层施工，相比传统路拌机，冷再生机的刀辊转速（一般 100-200 转 / 分钟）与切削深度（可调至 30 厘米）更适合处理较硬的水泥稳定材料，且拌和效率更高（每小时可处理 500-800 立方米）。施工时需注意控制含水率（比最佳含水率高 1%-2%），避免水泥结块或拌和不均。

　　In the construction of cement stabilized soil or cement modified soil, the cold recycling machine can achieve efficient mixing of cement and soil. The equipment crushes the original road surface or subgrade soil by rotating the knife roller, and sprays a certain amount of cement slurry (usually 5% -8% cement dosage) while crushing and mixing to ensure uniform contact between cement and soil particles. This process is commonly used in highway base construction. Compared with traditional road mixers, the cold recycling machine's blade roller speed (usually 100-200 revolutions per minute) and cutting depth (adjustable to 30 centimeters) are more suitable for processing harder cement stabilized materials, and the mixing efficiency is higher (can process 500-800 cubic meters per hour). During construction, attention should be paid to controlling the moisture content (1% -2% higher than the optimal moisture content) to avoid cement clumping or uneven mixing.

　　冷再生机处理水泥的关键在于设备配置与工艺参数的匹配。破碎水泥混凝土时，需更换耐磨刀具（如钨钢合金刀头，硬度≥HRC55），并调整刀辊间距（通常设为 20-30 毫米），确保破碎粒径符合设计要求。处理水泥稳定材料时，设备需配备精准的计量喷洒系统，水泥用量误差需控制在 ±2% 以内，同时通过速度传感器（精度 ±0.5km/h）控制行进速度，保证拌和均匀度。部分冷再生机还具备添加泡沫沥青的功能，可在处理含水泥材料时同步加入沥青，形成复合稳定结构，提升基层柔韧性。

　　The key to using a cold recycling machine to process cement lies in the matching of equipment configuration and process parameters. When crushing cement concrete, it is necessary to replace wear-resistant cutting tools (such as tungsten steel alloy cutting heads, hardness ≥ HRC55) and adjust the spacing between the cutting rollers (usually set to 20-30 millimeters) to ensure that the crushing particle size meets the design requirements. When processing cement stabilized materials, the equipment should be equipped with a precise metering and spraying system, and the cement dosage error should be controlled within ± 2%. At the same time, the travel speed should be controlled by a speed sensor (with an accuracy of ± 0.5km/h) to ensure the uniformity of mixing. Some cold recycling machines also have the function of adding foam asphalt, which can be added synchronously when processing cement containing materials to form a composite stable structure and improve the flexibility of the base course.

　　然而，冷再生机处理水泥并非适用于所有场景。对于高强度、高硬度的水泥制品（如桥梁混凝土构件），其破碎能力有限（最大破碎强度一般≤30MPa），需先用破碎机预处理。当水泥材料中含有钢筋时，冷再生机的刀辊可能被钢筋缠绕（钢筋直径＞12 毫米时风险显著增加），需提前人工清除。此外，处理水泥时需严格控制再生深度，避免切削过深导致原路基扰动（一般再生深度不超过原结构层厚度的 80%）。

　　However, cold recycling machines for treating cement are not suitable for all scenarios. For high-strength and high hardness cement products (such as bridge concrete components), their crushing capacity is limited (maximum crushing strength is generally ≤ 30MPa), and they need to be pretreated with a crusher first. When the cement material contains steel bars, the cutter roller of the cold recycling machine may be wrapped by the steel bars (the risk significantly increases when the steel bar diameter is greater than 12 millimeters), and manual removal is required in advance. In addition, when processing cement, it is necessary to strictly control the depth of regeneration to avoid cutting too deeply and causing disturbance to the original roadbed (generally, the depth of regeneration should not exceed 80% of the thickness of the original structural layer).

　　施工后的质量控制是冷再生机处理水泥效果的重要保障。拌和完成后，需及时检测混合料的水泥剂量（采用 EDTA 滴定法，偏差≤±0.5%）、含水率（与最佳值偏差≤±1%）及颗粒级配（通过 4.75mm 筛孔的质量百分比控制在 60%-70%）。压实过程中，需根据水泥初凝时间（通常 4-6 小时）合理安排工序，采用重型压路机（吨位≥18 吨）分层压实，每层厚度不超过 20 厘米，确保压实度≥97%（按重型击实标准）。养护期间需覆盖薄膜或洒水，保持表面湿润 7 天以上，避免水泥强度损失。

　　Quality control after construction is an important guarantee for the effectiveness of cold recycling machines in treating cement. After mixing, it is necessary to promptly detect the cement dosage (using EDTA titration method, with a deviation of ≤± 0.5%), moisture content (with a deviation of ≤± 1% from the optimal value), and particle size distribution (controlling the mass percentage through 4.75mm sieve holes at 60% -70%) of the mixture. During the compaction process, it is necessary to arrange the process reasonably according to the initial setting time of cement (usually 4-6 hours), and use heavy-duty rollers (tonnage ≥ 18 tons) to compact in layers, with each layer thickness not exceeding 20 centimeters, to ensure a compaction degree of ≥ 97% (according to the heavy-duty compaction standard). During the maintenance period, it is necessary to cover the surface with a thin film or sprinkle water to keep it moist for more than 7 days to avoid loss of cement strength.

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