Modified asphalt-based filling and sealing agent using waste foam and preparation method thereof

Abstract

The invention relates to a modified asphalt-based filling and sealing agent using waste foam and a preparation method thereof. The filling and sealing agent contains heavy traffic paving asphalt, a polystyrene resin particle, a surfactant, a plasticizer, a modifier, an antifoaming agent, a filling material and water, wherein the polystyrene resin particle is prepared from waste polystyrene foam products. The filling and sealing agent is a uniform grey black liquid, has a pH value of 9 to 10, solid content of 75 to 85%, a residue softening point of no less than 78 DEG C, residue penetration of 39 to 80 dmm, a flow value of 3 to 8 mm after surface drying, an elastic recovery rate of 46 to 66%, bonding strength of no less than 0.4 MPa and no water seepage at a pressure of 0.3 MPa; and a sample does not fracture in 3 weeks when drawn by 50% at a low temperature of -10 DEG C to -20 DEG C; cold filling and sealing or hot filling and sealing in an on-site heating manner can be adopted for the filling and sealing agent, and storage stability of the filling and sealing agent lasts for 12 months. The preparation method has the advantages of low cost, simple preparation technology and easily available raw materials.

Description

technical field [0001] The invention belongs to the technical field of road building materials, and in particular relates to a potting agent used for cracks and joint potting and repairing of asphalt pavement and cement concrete pavement. Background technique [0002] With the development of the economy, the lack of resources has become increasingly prominent, and the regeneration and reuse of waste materials is very important. Among all kinds of plastics, polystyrene (PS) and expanded polystyrene (FPS) are widely used. In recent years, the annual global consumption of polystyrene has exceeded 10 million tons, and it is showing an upward trend year by year. What is worrying is that even if such waste products do not degrade for 200 years under natural conditions, the current polystyrene can have an impact on the living environment of several generations or even a dozen generations, which has caused serious "white pollution" and caused ecological pollution. The environment i...

AI Technical Summary

Problems solved by technology

When ordinary hot asphalt is used for potting, under high temperature conditions, ordinary hot asphalt has a low softening point and is prone to oil flooding and being taken away by vehicles. The viscosity of perishable asphalt is high and the flow and permeability are poor

Liquid asphalt (emulsion) is mixed with a solvent to improve the low-temperature fluidity and permeability of the asphalt, but the high-temperature stability and elastic recovery performance are reduced, and it is easy to overflow and be taken away by vehicles at high temperature in summer to pollute the road surface, and it is easy to pull at low temperature in winter open

The advantages of silicone potting agent are: long storage time and moderate mechanical strength; the disadvantages are: long curing time, obvious pungent smell, poor bonding performance to asphalt concrete, poor permeability and expensive price, not suitable for road maintenance large scale use

The disadvantages of this invention are: the proportion of diluent and amine curing agent used is relatively high, the emission of harmful gas is relatively large, and the physical damage to production personnel and on-site construction personnel is large. At the same time, epoxy resin is difficult to cure and expensive in formula.