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Warm-mixing high-elastoplasticity bridge expansion joint sealing material and preparation method thereof

A high-elasticity, warm-mixing type technology, applied in building insulation materials, building components, climate change adaptation, etc., can solve the problems of insufficient material elasticity, difficult bridge coordination deformation, high construction requirements, etc., and achieve good high temperature and anti-rutting Ability, viscosity reduction effect

Active Publication Date: 2013-09-18
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the joint filling material is required to have good elasticity and good bonding ability with the bridge. In recent years, many elastic-plastic bridge expansion joint joint filling materials have appeared at home and abroad, but there are two problems: 1. . The elasticity of the material does not meet the requirements, and it is difficult to coordinate with the deformation of the bridge, resulting in cracks and diseases of the expansion device; 2. The construction temperature is high, generally above 200 ° C, and the construction requirements are high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of warm-mix type highly elastic modified asphalt, comprising the following components:

[0026] 70# road petroleum asphalt: styrene-butadiene block polymer (SBS): styrene-butadiene rubber (SBR): resin: stabilizer: warm mix agent = 100:9:4:4:3:3. The styrene-butadiene block polymer is star-shaped. Described resin is petroleum resin. The stabilizer is a mixture of sulfur and TOR rubber stabilizer, the ratio is: sulfur:TOR=4:1. Described warm mixing agent is Sasobit viscosity reducer.

[0027] 1. Put the asphalt in the temperature of 120℃ for 1 hour, until the asphalt is in a liquid state.

[0028] 2. Use an electric furnace to heat, set the temperature at 175~180°C, add the weighed styrene-butadiene block polymer (SBS) into the asphalt, and use a high-speed shearing machine for high-speed shearing at a speed of 1500~ 3000r / min, the shearing time is 30~45min, then add SBR for high speed shearing for 30~60min, add resin and TOR rubber stabilizer to shear for 20~3...

Embodiment 2

[0039] A kind of warm-mix type highly elastic modified asphalt, comprising the following components:

[0040] 70# road petroleum asphalt: styrene-butadiene block polymer (SBS): styrene-butadiene rubber (SBR): resin: stabilizer: warm mix agent = 100:5:4:4:3:3. The styrene-butadiene block polymer is star-shaped. Described resin is petroleum resin. The stabilizer is a mixture of sulfur and TOR rubber stabilizer, the ratio is: sulfur:TOR=4:1. Described warm mixing agent is Sasobit viscosity reducer.

[0041] 1. Put the asphalt in the temperature of 120℃ for 1 hour, until the asphalt is in a liquid state.

[0042] 2. Use an electric furnace to heat, set the temperature at 175~180°C, add the weighed styrene-butadiene block polymer (SBS) into the asphalt, and use a high-speed shearing machine for high-speed shearing at a speed of 1500~ 3000r / min, the shearing time is 30~45min, then add SBR for high speed shearing for 30~60min, add resin and TOR rubber stabilizer to shear for 20~3...

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Abstract

The invention discloses a warm-mixing high-elastoplasticity bridge expansion joint sealing material and a preparation method thereof. The warm-mixing high-elastoplasticity bridge expansion joint sealing material comprises the following components: petroleum asphalt: SBS (Styrene-Butadiene Block Polymer):SBR (Styrene Butadiene Rubber):resin: stabilizing agents: warm-mixing agents=100:(3-10):(1-5):(0-10):(2-6):(1-5), wherein the resin is petroleum resin or abietic resin; and the stabilizing agents are mixtures of sulphur and TOR (trans-polyoctenamer rubber) stabilizing agents, and the proportion of the sulphur to TOR is 4: (1-2). The joint sealing material obtained through a formula has the characteristics of being a warm-mixing type modified asphalt material which has stability at high temperature, cracking resistance at low temperature, good bonding capacity and very good elastic recovery capacity.

Description

technical field [0001] The invention belongs to building materials, and relates to a warm-mixing type high-elasticity modified asphalt, which is mainly used for the elasticity of the asphalt and lowering the construction temperature of the asphalt, and is suitable for bridge expansion joints of seamless bridges. Background technique [0002] Warm mixing technology is to reduce the mixing degree of asphalt by adding certain additives to asphalt or using special technology. Compared with traditional asphalt, the construction temperature of warm mix asphalt can be reduced by 30~60℃. The reduction of asphalt construction temperature can not only reduce energy consumption during production, reduce emissions of carbon dioxide, smoke and other waste gases, effectively protect the surrounding environment, but also protect the health of construction workers and prolong the service life of construction equipment. [0003] Expansion joints are expansion joints installed between adjace...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L9/06C08L57/02C08L93/04C08K3/06
CPCY02A30/30
Inventor 孙大权曹林辉胡金龙
Owner TONGJI UNIV
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