Can joint filler repair cracks?

Pavement cracks affect the beauty of roads and reduce their service life. There are many reasons for pavement cracks: there are too many fine materials in concrete; Maintenance is not in place after pouring; ? The foundation is not compacted, and there is backfill soil locally; There is something wrong with the quality of cement; ? Problems such as uneven concrete mixing cause pavement cracking and shorten the service life of pavement. In today's increasingly noisy traffic conditions, it may get worse. Therefore, road repair and maintenance is particularly important. Pavement crack treatment is a construction technology for repairing pavement cracks of about 3 mm to 20 mm, that is, Huatong cold joint sealant. The width and depth of pavement cracks, such as cracks with a width of more than 3 mm, can be poured directly after cleaning. The crack width is less than 3mm, and Huatong backpack seam expanding machine is adopted, which is small in size, light in weight, free to expand the seam, and can track any turning seam expanding. Generally, the width of expansion joint is 4 ~ 8mm, and the depth of expansion joint is 6 ~ 10mm, and the loose concrete slag left in the joint after expansion joint is thoroughly removed by using Huatong spike soot blowing cleaning machine while ensuring the clean removal of floating dust.

For wide and deep cracks, fine sand or other fillers can be filled in the cleaned cracks before pouring glue, and a space of 20px is reserved for pouring glue. If the crack depth is about 25px, this step can be ignored. For cracks with a width less than 3mm, it is necessary to expand the cracks with a joint expanding machine before pouring glue, and the width and depth of the cracks should be 6-8mm after expanding the cracks (the reason for expanding the cracks is that the inherent surface tension of the glue cannot reach the self-leveling of the glue, so that the glue cannot be poured into the cracks smoothly). After expansion joint, 30 linear meters can be poured per kilogram of cold joint sealant. Cracks with a width greater than 3 mm can be directly injected with backpack glue filling machine or special glue filling bag. According to the measurement, every kilogram of cold joint sealant can pour 10-20 linear meters of conventional cracks, and the total cost of cold joint sealant for expansion joints, dust removal, glue filling and gluing per meter is not more than that of 3 yuan.

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