High-elasticity high/low-temperature-resistant road joint sealing material and preparation method thereof

Abstract

The invention discloses a high-elasticity high / low-temperature-resistant road joint sealing material and a preparation method thereof. The road joint sealing material is prepared from coal tar, matrix asphalt, modifiers, a plasticizer, a stabilizer and a filler by a two-stage operation process. The method comprises the following steps: first stage: while stirring at low speed, carrying out thermal dehydration on the coal tar, adding the matrix asphalt and rubber powder, and heating to 160-210 DEG C for swelling; and second stage: increasing the stirring rate, cooling to 125-140 DEG C, adding the stabilizer, plasticizer and polyvinyl chloride, stirring for plastifying, finally adding the filler, stirring uniformly, cooling, and discharging the high-elasticity high / low-temperature-resistant road joint sealing material. The product has excellent high / low temperature resistance, and can not drip at high temperature in summer or crack at -18 DEG C in winter. The product has the advantages of favorable aging resistance, high elastic recovery rate and low raw material price, and can easily implement industrial production. The modifiers polyvinyl chloride and rubber powder are from waste plastic tires and the like; and the polyvinyl chloride, rubber powder and coal tar are wastes to be recovered and reutilized.

Description

Technical field [0001] The invention relates to a road joint filler with high elasticity and high and low temperature resistance and a preparation method thereof, which is a road maintenance material and belongs to the field of construction engineering. Background technique [0002] With the rapid increase of the number of vehicles in our country, it has brought great pressure to the road. Some national highways, provincial highways, county and township roads and expressways often suffer from different degrees of road surface crack damage, which affects the road structure to a certain extent. Complete safety and comfort. Minor cement and asphalt pavement cracks are mostly repaired with asphalt road joint fillers, but the joint sealants currently used for road repair still have some shortcomings in product performance. If base asphalt is used as a joint filler for road repair, although the product is easy to obtain and easy to construct, it is prone to flow in high temperatu...

AI Technical Summary

Problems solved by technology

The most widely used polymer modifiers are styrene-butadiene rubber, neoprene rubber, styrene-butadiene-styrene, polyethylene, ethylene-acetic acid copolymer, epoxy resin and polyurethane, etc. The performance of the product has been improved to a certain extent, but the high molecular polymer still often segregates in the base asphalt, and there are also asphalt joint fillers that are sensitive to temperature, prone to high temperature flow in summer and cracking in winter and poor adhesion, and foundation waterproof Poor effect, easy aging by ultraviolet radiation, short service life, etc.

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