Modified emulsified asphalt seam filling mortar and preparation method thereof

Abstract

The invention discloses modified emulsified asphalt seam filling mortar which is prepared by mixing an A component and a B component, wherein the A component comprises by weight of 100 parts of emulsified asphalt, 10-12 parts of SBS latex modifying agent, 0.5-1 part of cross-linking agent and 50-55 parts of water; the B component comprises by weight of 100 parts of cement, 50 parts of mineral powder, 1 part of water reducing agent, 8-12 parts of expanding agent, 2 parts of aluminum powder, 70 parts of quartz sand and 200 parts of rubble; the modified emulsified asphalt seam filling mortar has a higher softening point and good temperature resistance and prolongs the service life of emulsified asphalt effectively; the road surface friction coefficient and the coating compression resistance and impact resistance can be increased by the aid of the rubble and the quartz sand; the specifically-prepared emulsified asphalt and the SBS latex modifying agent can endow the seam filling mortar with excellent penetration and bonding performance; the modified emulsified asphalt seam filling mortar can meet the high temperature condition and is applied to road repair requiring rapid traffic opening.

Description

technical field [0001] The invention belongs to the technical field of preparation of emulsified asphalt joint filling mortar, in particular to a modified emulsified asphalt joint filling mortar and a preparation method thereof. Background technique [0002] Although asphalt pavement has the advantages of good wear resistance, not easy to generate dust, anti-skid, and anti-seepage, due to the characteristics of asphalt itself, which is easy to oxidize, easy to wear, easy to melt at high temperature and brittle at low temperature, after several years of use, the asphalt pavement After surface oxidation, wheel friction loss, rain and snow erosion, high temperature melting, low temperature embrittlement and other factors, the phenomenon of pavement fine aggregate loss, surface asphalt coating loss, coarse aggregate exposure, and polishing generally occurs, making the pavement The coefficient of friction is severely reduced, which affects driving safety. It will also increase th...

AI Technical Summary

Problems solved by technology

[0003] The existing method to solve the aging and mild damage of asphalt pavement is generally to use asphalt to heat up on-site pouring, pouring, and paving. However, since the asphalt thickens and solidifies rapidly after cooling in the air, it cannot penetrate into the cracked cracks. Does not have the effect of seam filling and bonding

However, ordinary emulsified asphalt spraying and flood irrigation are used for repairing, although the construction is convenient and the flood irrigation effect is good, but due to the low melting point of emulsified asphalt, its adhesion rate will drop sharply with the increase of temperature, and the effect of filling joints and bonding will be lost, especially when the temperature is high in summer. Often because the emulsified asphalt on the road surface is constantly being taken away by the wheels after melting, the repair project fails