冷再生機(jī)作為道路施工的多功能設(shè)備，在處理含水泥材料的工程中能否發(fā)揮作用，需結(jié)合其工作原理、設(shè)備配置及施工工藝綜合判斷。這類設(shè)備通過(guò)破碎、拌和、再生等工序，可對(duì)水泥相關(guān)材料進(jìn)行合理處置，但其應(yīng)用效果與操作規(guī)范緊密相關(guān)。

　　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.

　　冷再生機(jī)處理水泥的核心場(chǎng)景，集中在舊水泥混凝土路面再生與水泥穩(wěn)定類基層施工兩大領(lǐng)域。在舊水泥路面改造中，冷再生機(jī)可將破損的水泥混凝土板塊破碎至一定粒徑（通?？刂圃?30-50 毫米），并與新添加的集料、水泥、粉煤灰等材料均勻拌和，形成再生混合料。這種工藝適用于低等級(jí)道路基層或底基層施工，既能消耗廢舊水泥塊，又能減少新材料用量。例如，某省道改造項(xiàng)目中，冷再生機(jī)將廢棄水泥路面破碎后，按 1:9 比例摻入新水泥，經(jīng)拌和壓實(shí)后，基層強(qiáng)度滿足設(shè)計(jì)要求（7 天無(wú)側(cè)限抗壓強(qiáng)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).

　　在水泥穩(wěn)定土或水泥改良土施工中，冷再生機(jī)可實(shí)現(xiàn)水泥與土的高效拌和。設(shè)備通過(guò)旋轉(zhuǎn)刀輥將原路面或路基土破碎，同時(shí)噴灑定量水泥漿（水泥用量通常為 5%-8%），邊破碎邊拌和，確保水泥與土顆粒均勻接觸。這種工藝常用于公路基層施工，相比傳統(tǒng)路拌機(jī)，冷再生機(jī)的刀輥轉(zhuǎn)速（一般 100-200 轉(zhuǎn) / 分鐘）與切削深度（可調(diào)至 30 厘米）更適合處理較硬的水泥穩(wěn)定材料，且拌和效率更高（每小時(shí)可處理 500-800 立方米）。施工時(shí)需注意控制含水率（比最佳含水率高 1%-2%），避免水泥結(jié)塊或拌和不均。

　　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.

　　冷再生機(jī)處理水泥的關(guān)鍵在于設(shè)備配置與工藝參數(shù)的匹配。破碎水泥混凝土?xí)r，需更換耐磨刀具（如鎢鋼合金刀頭，硬度≥HRC55），并調(diào)整刀輥間距（通常設(shè)為 20-30 毫米），確保破碎粒徑符合設(shè)計(jì)要求。處理水泥穩(wěn)定材料時(shí)，設(shè)備需配備精準(zhǔn)的計(jì)量噴灑系統(tǒng)，水泥用量誤差需控制在 ±2% 以內(nèi)，同時(shí)通過(guò)速度傳感器（精度 ±0.5km/h）控制行進(jìn)速度，保證拌和均勻度。部分冷再生機(jī)還具備添加泡沫瀝青的功能，可在處理含水泥材料時(shí)同步加入瀝青，形成復(fù)合穩(wěn)定結(jié)構(gòu)，提升基層柔韌性。

　　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，冷再生機(jī)處理水泥并非適用于所有場(chǎng)景。對(duì)于高強(qiáng)度、高硬度的水泥制品（如橋梁混凝土構(gòu)件），其破碎能力有限（最大破碎強(qiáng)度一般≤30MPa），需先用破碎機(jī)預(yù)處理。當(dāng)水泥材料中含有鋼筋時(shí)，冷再生機(jī)的刀輥可能被鋼筋纏繞（鋼筋直徑＞12 毫米時(shí)風(fēng)險(xiǎn)顯著增加），需提前人工清除。此外，處理水泥時(shí)需嚴(yán)格控制再生深度，避免切削過(guò)深導(dǎo)致原路基擾動(dòng)（一般再生深度不超過(guò)原結(jié)構(gòu)層厚度的 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).

　　施工后的質(zhì)量控制是冷再生機(jī)處理水泥效果的重要保障。拌和完成后，需及時(shí)檢測(cè)混合料的水泥劑量（采用 EDTA 滴定法，偏差≤±0.5%）、含水率（與最佳值偏差≤±1%）及顆粒級(jí)配（通過(guò) 4.75mm 篩孔的質(zhì)量百分比控制在 60%-70%）。壓實(shí)過(guò)程中，需根據(jù)水泥初凝時(shí)間（通常 4-6 小時(shí)）合理安排工序，采用重型壓路機(jī)（噸位≥18 噸）分層壓實(shí)，每層厚度不超過(guò) 20 厘米，確保壓實(shí)度≥97%（按重型擊實(shí)標(biāo)準(zhǔn)）。養(yǎng)護(hù)期間需覆蓋薄膜或?yàn)⑺?，保持表面濕?rùn) 7 天以上，避免水泥強(qiáng)度損失。

　　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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