Research and testing of green and slow release microencapsulated self melting ice agent for asphalt pavement

Abstract

In order to solve the problems of road corrosion and environmental damage caused by traditional chloride road snow melting agent, a green and environment-friendly slow release microencapsulated self melting ice agent was developed. The core material of self melting ice agent was made by extracting the organic substances in furfural. The core material of snow melting salt was adsorbed into the pores by using solid waste carrier, and the surface of the carrier of the adsorption core material was modified by the polymer capsule wall to form a microcapsule structure. Taking freezing point and relative ice-melting and snow-melting ability as indexes, the indoor performance test was carried out, and the field pilot test was carried out in section (K64+992)~(K65+193641) of Jingxiong Expressway. The results show that the indoor ice-melting rate reaches 469% when the ratio of microcapsule to pavement material is 4%, which far exceeds the standard requirement. In the pilot test of 55% replacement of mineral powder, the snow on the road surface melted completely, which shows the good ice-melting effect. The ice-melting agent core developed by using furfural pyrolysis waste liquid extract has a remarkable slow-release effect, avoids the corrosiveness of the traditional chloride additive, reduces the corrosion to the road surface and the environmental pollution, and achieves the green environmental protection effect.

Keywords

• organic chemistry of natural products; ice melting agent; solid waste utilization; slow release microcapsules; non-chlorine salts; green and environmental protection