Method for preparing single-component waterborne epoxy modified emulsified asphalt

Abstract

The invention discloses a method for preparing a single-component waterborne epoxy modified emulsified asphalt. The method comprises the following steps: a, mixing a waterborne epoxy resin with an emulsified asphalt to prepare an emulsified asphalt A; b, uniformly mixing a curing agent with hot asphalt, performing emulsification to obtain an emulsified asphalt B containing the curing agent in asphalt particles; and c, uniformly mixing the emulsified asphalt A with the emulsified asphalt B to obtain the single-component waterborne epoxy modified emulsified asphalt. The curing agent hides in theasphalt latex particles, so the curing reaction of the epoxy resin in an emission during the storage period is avoided, and the storage stability is improved; the application convenience is benefited, the construction process can be easily monitored, and the quality stability is improved; and the oil-based curing agent has no diffusion loss in water, so the epoxy resin is cured completely after the film formation of the emulsion, the performances after the formed film is cured are improved, the loss of the curing agent is reduced, and the curing efficiency is improved. The prepared asphalt emulsion is suitable for various civil engineering construction and waterproof and anticorrosive protection projects as a structural material and a functional material.

Description

technical field

[0001] The invention relates to a modified emulsified asphalt, in particular to a preparation and application method of a single-component water-based epoxy modified asphalt. Background technique

[0002] Asphalt is an oily substance, which is widely used in civil engineering, waterproofing, anticorrosion, etc., in various ways. With the improvement of environmental protection requirements, the application of asphalt materials is gradually developing in the direction of water-based, and it is applied in the form of emulsified asphalt. In various application scenarios, due to the presence of water in the emulsion, the performance of emulsified asphalt is lower than that of hot melt or hot mix asphalt. Modification with epoxy resin is an effective means to improve its performance.

[0003] There are various modification methods of epoxy modified emulsified asphalt, for example: patents CN1441032, CN102010607, CN1903941 first prepare emulsified asphalt, then a...