沥青道路出现裂缝是沥青路面的问题表现之一，裂缝不仅影响到路面的美观还会降低平整度，而且影响整个道路的使用寿命，特别是当路面开裂后，雨水就会通过裂缝渗到路面基层沥青混合料，底基层甚路基，这样会腐蚀混凝土路基，削弱基层土基的强度，加速道路的破坏，缩短路面的使用寿命。因此，有必要及时对路面裂缝进行适当的处理。

Cracks on asphalt roads are one of the manifestations of asphalt pavement problems. Cracks not only affect the appearance of the road surface but also reduce its smoothness, and also affect the entire service life of the road. Especially when the road surface cracks, rainwater will seep into the asphalt mixture, sub base, and even roadbed of the road surface through the cracks, which will corrode the concrete roadbed, weaken the strength of the base soil foundation, accelerate the damage of the road, and shorten the service life of the road surface. Therefore, it is necessary to promptly and appropriately handle road surface cracks.

针对10～30mm左右的裂缝开槽处治路面裂缝修补法施工工艺，即压力热灌注工艺一般分为如下六个步骤。

The construction process of the road surface crack repair method, which involves slotting and treating cracks around 10-30mm in size, is generally divided into the following six steps, namely the pressure hot grouting process.

路面勘察：根据路面裂缝的具体情况，确定补缝设计方案。

Road surface survey: Determine the joint filling design plan based on the specific situation of road surface cracks.

前期工作：检查开槽机与灌缝机，启动灌缝机并将密封胶加热到施工所需的温度。加热期间将灌缝机拖挂在卡车后面，并把密封胶隔离墩指示标牌开槽机和热喷枪等装在卡车上，拖到预定施工地点，将公路半幅的一半封闭作为施工区。

Preliminary work: Check the slotting machine and grouting machine, start the grouting machine, and heat the sealant to the required temperature for construction. During the heating period, hang the grouting machine behind the truck and install the sealant isolation pier safety indicator, slotting machine, and hot spray gun onto the truck. Drag them to the designated construction site and seal half of the road as the construction area.

沥青混合料

Asphalt mixture

开槽：按照设计开槽尺寸，调节好开槽深度，然后进行开槽作业

Slotting: Adjust the slotting depth according to the designed slotting size, and then proceed with the slotting operation

清缝：用吹风机将槽内碎渣及裂缝两侧10cm内的灰尘彻底清扫干净。

Cleaning: Use a hair dryer to thoroughly clean the debris and dust within 10cm on both sides of the crack in the groove.

灌缝：若在气温低于7℃时，使用热喷枪对开好的槽进行预热以提高密封胶粘结力；如槽有潮气，使用热喷枪干燥处理。将加热好的密封胶均匀地灌入槽内，并在裂缝两侧拖成一定宽度与厚度的封层。

Sealing: If the temperature is below 7 ℃, use a hot spray gun to preheat the opened groove to improve the sealing adhesive adhesion; If there is moisture in the slot, use a hot spray gun for drying treatment. Evenly pour the heated sealant into the groove and drag it onto both sides of the crack to form a sealing layer with a certain width and thickness.

养护：灌缝后密封胶充分冷却把路面上碎渣清扫干净后，才能开放交通，一般时间18min，具体开放交通时间还是要根据气温情况来确定。

Maintenance: After filling the joint, the sealant should be fully cooled and the debris on the road surface should be cleaned before traffic can be opened. The general time is 18 minutes, and the specific opening time of traffic still depends on the temperature situation.