Gap filling adhesive for maintaining asphalt concrete pavement and preparing method

Abstract

The invention discloses a gap filling adhesive for maintaining an asphalt concrete pavement and a preparing method. The gap filling adhesive is prepared from, by mass, 40% to 50% of SBS modified asphalt, 2% to 5% of toughening agent, 1% to 3% of surfactant, 2% to 4% of coupling agent and 43% to 50% of inorganic filler. The preparing method includes the steps that the liquid SBS modified asphalt is pumped into a dispersing kettle; the toughening agent is added, and the mixture is dispersed at a high speed at the temperature of 150 DEG C to 180 DEG C for 30 minutes to 60 minutes; the surfactant, the coupling agent and the inorganic filler or pre-prepared surfactant filler are sequentially added, the mixture continues to be dispersed, and even-thickness black liquid is obtained, cooled, solidified and packaged. The gap filling adhesive is black elastic solid at the normal temperature, and has good mechanical strength, excellent high-low-temperature performance, excellent permeating performance and excellent adhesive performance; the gap filling adhesive becomes flow high-viscous liquid after being heated, and is poured into gaps in the asphalt concrete pavement to seal the gaps, so that the comfort of the asphalt pavement is improved, and the service life of the pavement is prolonged.

Description

technical field [0001] The invention relates to a joint filling glue and a preparation method thereof, in particular to a joint filling glue for asphalt concrete road surface maintenance and a preparation method thereof. Background technique [0002] Crack is one of the most common, most prone and earliest diseases of asphalt concrete pavement. Cracks appear on the pavement and pavement maintenance cannot be carried out in time. Rainwater and other sundries will enter the surface structure and roadbed along the cracks, which will lead to a decrease in the bearing capacity of the pavement, accelerate local damage to the pavement, greatly reduce the use quality of the pavement, and shorten the road surface. The service life of the equipment increases the cost of post-maintenance. Therefore, when there are cracks in the asphalt concrete pavement, it should be sealed and repaired in time. [0003] Gap glue is a material used for sealing and repairing cracks in asphalt concrete...

AI Technical Summary

Problems solved by technology

[0005] There are many kinds of commercial joint grouting adhesives. In actual use, they often face problems such as bonding performance, permeability, low-temperature brittleness, and poor fluidity, which cause repeated lesions in cracks, short maintenance periods, and high frequency. Maintenance Costs and Safety Risks

The results of pavement coring inspection found that the joint glue showed a superficial filling state at the lesion, did not penetrate deep into the crack surface, and lacked good adhesion to the asphalt mixture on both sides of the crack

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