Flexible seamless expansion joint connecting material and preparation method thereof

Abstract

The invention discloses a flexible seamless expansion joint connecting material and a preparation method thereof. The flexible seamless expansion joint connecting material is prepared from 17 to 24 mass percent of high-elasticity sealants, 75 to 85 mass percent of aggregates and 0 to 8 mass percent of filling materials. The preparation method of the flexible seamless expansion joint connecting material comprises the following steps of heating the aggregates to a first preset temperature; uniformly mixing the aggregates and the filling materials to form a mixed material; heating the high-elasticity sealants to a second preset temperature; partially or totally adding the heated high-elasticity sealants into the heated mixed material; performing uniform mixing; reaching a third preset temperature; forming the flexible seamless expansion joint connecting material. The flexible seamless expansion joint connecting material has the advantages that the cost is low; the influence on operators is small; the field manual stirring is not needed; a joint connecting layer formed by the joint connecting material cannot easily generate problems of separation, cracking, tracks, pushing displacementand the like.

Description

technical field [0001] The invention relates to the fields of road building materials and engineering, in particular to a flexible seamless expansion joint joint material and a preparation method thereof. Background technique [0002] Common types of bridge expansion joints include open type, mechanical type, and seamless type. Open-type expansion joints do not have any closed joint filler, and have no water-blocking function, which is likely to cause pollution and damage to the substructure of the bridge. At present, mechanical expansion joints are mostly used. The disadvantages are that the structure is complex, the cost is high, the maintenance and maintenance are troublesome, labor-intensive and time-consuming, and the joints are prone to problems such as water seepage and car jumping. Relatively speaking, seamless expansion joints can form a continuous whole with the bridge deck pavement layers before and after. Good performance, and acid and alkali corrosion resistan...

AI Technical Summary

Problems solved by technology

[0003] At present, the joint materials of seamless expansion joints on the market are mostly imported materials, such as TST in the UK, MATRIX502 in the United States, etc., which are expensive and often debonded from the original bridge deck pavement in the later stage of use. seepage problem

Domestic potting materials are mostly rubber asphalt materials, rubber powder and rubber particles are added to the materials, and some styrene-butadiene rubber is added, which will cause rubber asphalt materials to produce pungent smell at high temperature and cause certain disadvantages to operators. Impact

Moreover, most of the joint materials of seamless expansion joints on the market currently require on-site processing, so they are often restricted by site conditions, resulting in a relatively rough proportion of material usage, uneven and unstable materials, which will make the joint layer formed by the joint material easy. Problems with segregation, cracking, rutting or shifting

Images