Flexible seamless expansion joint connecting material and preparation method thereof

A seamless expansion and joint material technology, applied in the field of road building materials and engineering, can solve the problems of debonding and water seepage of the original bridge deck pavement, irritating odor operators, and rough material consumption ratio, so as to solve the problem of water damage. Problems and jumping of expansion joints, good economy, effect of solving uneven material

Inactive Publication Date: 2019-03-29
GUANGZHOU MUNICIPAL ENG MAINTENANCE DEPT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Flexible seamless expansion joint connecting material and preparation method thereof
  • Flexible seamless expansion joint connecting material and preparation method thereof
  • Flexible seamless expansion joint connecting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides a flexible seamless expansion joint joint compound. The raw materials for the preparation of the flexible seamless expansion joint material include the following raw material components: high elastic sealant, aggregate and filler.

[0044] The mass percentage of the high elastic sealant is 17%-24%, the mass percentage of the aggregate is 75%-85%, and the mass percentage of the filler is 0%-8%.

[0045] The above-mentioned flexible seamless expansion joint material is a kind of high-viscosity, flexible, stretchable, compressible recovery, and can resist traffic load damage, which is formed by mixing high-elastic sealant, aggregate and filler evenly. The bridge expansion joint joint material, the flexible seamless expansion joint joint material can adapt to the expansion and contraction of the bridge for adaptive deformation.

[0046] In a specific example, the high-elastic sealant is a polymer-modified asphalt obtained by modifying a non-rubber ...

Embodiment 2

[0069] This embodiment provides a method for preparing a flexible seamless expansion joint compound, which includes the following steps:

[0070] The various components of the flexible seamless expansion joint joint material are weighed, including 20% ​​by mass of high-elastic sealant, 75% by mass of aggregate, and 5% by mass of filler.

[0071] The mixer used in the production of asphalt mixture is used to produce flexible seamless expansion joint joint material.

[0072] The aggregate is heated to a first preset temperature, and the aggregate and filler are uniformly mixed to form a mixture; the first preset temperature is 190°C-220°C.

[0073] Heat the high elastic sealant to a second preset temperature; the second preset temperature is 170°C-180°C.

[0074] Add part or all of the heated high elastic sealant into the heated mixture, mix evenly and maintain the third preset temperature to form a flexible seamless expansion joint joint material, the third preset temperature ...

Embodiment 3

[0083] This embodiment provides a method for using the above-mentioned flexible seamless expansion joint compound, which includes the following steps:

[0084] Heat the aggregate to 200°C, use the existing asphalt mixer to pre-mix the aggregate with the filler for 5-10 seconds, and mix evenly to form a mixture.

[0085] Heat the high elastic sealant to 170°C.

[0086] Mix the heated mixture with 70% of the total amount of the heated high elastic sealant, and mix it with an asphalt mixer for 90-120 seconds; stir evenly and keep it at 190°C to form a flexible seamless expansion joint joint material to ensure that the ore Adhesive properties of materials and high elastic sealants. The wet mixing time when the mixture is mixed with the heated high elastic sealant is not less than 90s. The flexible seamless expansion joint joint compound formed by mixing can be used for the joint at the position of the expansion joint of the road construction road surface.

[0087] The ex-factor...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/00672C04B14/02C04B18/12
Inventor 余志雄彭馨彦林智勇林勇文甄文君吴凯旋吕爱华洪晶邱熙锋
Owner GUANGZHOU MUNICIPAL ENG MAINTENANCE DEPT
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