沥青混凝土路面在长期承受交通荷载及自然环境的交替作用下，极易产生裂缝病害。若不及时干预，雨水渗入将导致路面结构承载力下降，进而引发坑槽、网裂等严重破坏。本指南旨在提供一套科学、系统的裂缝修补技术方案，帮助养护人员“对症下药”，延长道路使用寿命。

Asphalt concrete pavement is prone to crack disease under the alternating effects of long-term traffic loads and natural environment. If not intervened in a timely manner, rainwater infiltration will lead to a decrease in the bearing capacity of the road structure, which in turn can cause serious damage such as potholes and mesh cracks. This guide aims to provide a scientific and systematic crack repair technology solution to help maintenance personnel "prescribe the right medicine" and extend the service life of roads.

一、 裂缝病害的科学评估与分类

1、 Scientific evaluation and classification of crack diseases

在制定修补方案前，必须对裂缝的成因、宽度及严重程度进行精准评估。沥青路面裂缝主要分为温度裂缝、荷载裂缝和基层反射裂缝等。按发展程度，可划分为以下几个阶段：

Before formulating a repair plan, it is necessary to conduct a precise assessment of the cause, width, and severity of the cracks. Asphalt pavement cracks are mainly divided into temperature cracks, load cracks, and base reflection cracks. According to the level of development, it can be divided into the following stages:

轻微裂缝（宽度＜5mm）：多为表面温度应力引起的浅层裂缝，尚未严重影响路面结构。

Minor cracks (width<5mm): mostly shallow cracks caused by surface temperature stress, and have not yet seriously affected the pavement structure.

中度裂缝（宽度≥5mm）：裂缝已贯穿面层，水分容易侵入，需进行密封或填充处理。

Moderate crack (width ≥ 5mm): The crack has penetrated the surface layer and moisture is prone to enter, requiring sealing or filling treatment.

重度/网状裂缝：裂缝纵横交错，通常由材料不达标或结构承载力不足引起，伴随松散、坑槽等结构性破坏。

Severe/network cracks: Cracks crisscross, usually caused by substandard materials or insufficient structural bearing capacity, accompanied by structural damage such as looseness and potholes.

二、 针对性修补技术与工艺选择

2、 Targeted repair technology and process selection

根据裂缝的发展阶段与宽度，应采取差异化的处治措施：

Differentiated treatment measures should be taken based on the development stage and width of the cracks:

预防性养护（未裂或初期微裂缝）

Preventive maintenance (uncracked or initial microcracks)

雾封层技术：采用稀释的乳化沥青雾化喷洒，封闭细小裂缝并补充老化沥青。适用于抗滑性良好的路面，成本低（约10元/㎡），但寿命较短（1-3年）。

Mist sealing technology: using diluted emulsified asphalt atomized spraying to seal small cracks and replenish aged asphalt. Suitable for roads with good skid resistance, low cost (about 10 yuan/square meter), but short lifespan (1-3 years).

微表处技术：将改性乳化沥青、集料等拌和摊铺成薄层，能有效封水并应对轻度线状裂缝。造价约15元/㎡，使用寿命可达4-7年，是极具性价比的预防手段。

Micro surfacing technology: mixing and spreading modified emulsified asphalt, aggregates, etc. into a thin layer, which can effectively seal water and deal with mild linear cracks. The cost is about 15 yuan/square meter, and the service life can reach 4-7 years, making it a cost-effective preventive measure.

前中期裂缝修补（宽度≥5mm）

Repair of cracks in the early and middle stages (width ≥ 5mm)

贴缝技术（推荐）：采用高分子极性聚合物制成的贴缝带直接粘贴。该工艺无需加热、流动性强，能深入缝隙，成功率高达95%，养护寿命3年以上，成本约4-5元/米。

Stitching technology (recommended): Directly stick the stitching tape made of high molecular polarity polymer. This process does not require heating, has strong fluidity, can penetrate deep into gaps, has a success rate of up to 95%, has a maintenance life of more than 3 years, and costs about 4-5 yuan/meter.

灌缝与开槽灌缝：对于超过5mm的裂缝，可采用密封胶灌缝；对于6mm以上较宽裂缝，需先用开槽机切出1-1.5cm宽的槽，清理干净后灌入热沥青或改性密封胶。此法密封性好，但受温度影响较大，成功率约75%-85%。

Grouting and slotting grouting: For cracks exceeding 5mm, sealant can be used for grouting; For cracks wider than 6mm, it is necessary to first use a slotting machine to cut grooves 1-1.5cm wide, clean them thoroughly, and then pour in hot asphalt or modified sealant. This method has good sealing performance, but is greatly affected by temperature, with a success rate of about 75% -85%.

网裂贴技术：针对大面积龟裂或网状裂缝，清理路面后直接铺设并压实网裂贴。该材料抗拉强度大，施工便捷，无需长时间封闭交通，能有效防止雨水下渗。

Mesh cracking sticker technology: For large areas of cracks or mesh cracks, the mesh cracking sticker is directly laid and compacted after cleaning the road surface. This material has high tensile strength, is easy to construct, does not require long-term traffic closure, and can effectively prevent rainwater infiltration.

后期及结构性病害处治

Late stage and structural disease treatment

压力注浆法：针对大面积结构性裂缝或基层反射裂缝，通过钻孔向路基深处高压灌注修补材料，填补深层空隙。

Pressure grouting method: For large-scale structural cracks or base reflection cracks, high-pressure grouting repair materials are injected deep into the roadbed through drilling holes to fill the deep gaps.

罩面或铣刨重铺：当裂缝发展到后期，路面结构严重受损时，只能采用薄层罩面（加铺2-3cm热沥青混合料）或铣刨后重新摊铺新面层。此阶段处治成本最高，因此前期预防性养护至关重要。

Covering or milling and re paving: When cracks develop to a later stage and the road structure is severely damaged, only a thin covering (adding 2-3cm hot asphalt mixture) or milling and re paving a new surface layer can be used. This stage has the highest treatment cost, so preventive maintenance in the early stage is crucial.

三、 施工注意事项与质量控制

3、 Construction precautions and quality control

清洁与干燥：无论采用何种修补工艺，施工前必须使用空压机或吹风机彻底清理缝内杂物、灰尘，并保持裂缝区域绝对干燥，这是确保粘结强度的先决条件。

Cleaning and drying: Regardless of the repair process used, it is necessary to thoroughly clean the debris and dust inside the cracks with an air compressor or blower before construction, and keep the crack area absolutely dry. This is a prerequisite for ensuring the bonding strength.

温度控制：灌缝施工需严格控制材料加热温度（通常在160-190℃）；微表处及薄层罩面施工时，环境温度宜在10℃以上，且需严格把控沥青混合料的出厂与摊铺温度。

Temperature control: Strict control of material heating temperature (usually between 160-190 ℃) is required for joint filling construction; During the construction of micro surface and thin layer overlay, the ambient temperature should be above 10 ℃, and the factory and paving temperature of asphalt mixture should be strictly controlled.

开放交通时机：贴缝、网裂贴等冷施工材料在压实后即可开放交通；而灌缝及热拌沥青罩面施工后，必须等待材料充分冷却（如路面温度低于50℃）方可放行，避免车辆轮胎带走修补材料。

Opportunity for traffic opening: Cold construction materials such as adhesive joints and mesh cracks can be opened to traffic after compaction; After the grouting and hot mix asphalt overlay construction, it is necessary to wait for the materials to cool sufficiently (such as when the road surface temperature is below 50 ℃) before releasing, to avoid the vehicle tires taking away the repair materials.