What material is used to repair cracks in cement pavement?

When repairing cracks in old cement pavement, it is best not to destroy the pavement structure layer, otherwise the internal structure of pavement may be destroyed by external forces, and more pavement diseases may occur. For the treatment of cement pavement cracks on this kind of pavement, the cement pavement crack repair material of Dunmei Road and Bridge in Henan Province can be a good solution. Cement pavement crack repair materials of Dunmei Road Bridge can be divided into shallow crack repair materials and deep cement pavement crack repair materials. It is mainly used to repair cracks in cement pavement with good repair effect, and can realize rapid opening to traffic, high wear resistance, high self-compaction, high bending resistance and poor compatibility with the original pavement. Because of its advantages of high strength, good durability and wide sources of cement, concrete pavement has developed rapidly in China, and the mileage of pavement has been increasing.

However, under the influence of modern traffic and natural factors, early pavement diseases appear constantly, among which cracks are the most common. For early micro-cracks, highway maintenance departments often use organic materials such as asphalt and epoxy resin to repair them in time. Although these materials have the function of bonding and sealing, they have some defects such as poor compatibility with pavement cement concrete, easy aging, high cost and unfavorable to environmental protection. Some of them need grooving and grouting. The construction process and matters needing attention are as follows: Grooving along the crack position, with the groove width of at least 1.2 cm, the groove depth range of 1.2-2.5 cm, and the depth-width ratio of 2: 1. Remove the loose edge part and treat the peeling part with a wire brush. Remove the sundries and dust at the joint and blow them clean with high-pressure air or hot air. Dry the cracks with liquefied gas blowtorch to ensure the dryness in the cracks. Pour the road sealant into the groove, and it is required to fill up the open joint filling groove. In order to open the traffic on the construction section in advance and reduce the traffic pressure caused by the construction operation, a small amount of sand or fine aggregate is sprinkled on the joint filler to prevent the wheels from sticking to the tires, thus opening the traffic in advance.