Warm-mix high elastic-plastic bridge expansion joint filler and its preparation method

A high-elasticity, warm-mixing technology, applied in building insulation materials, building components, climate change adaptation, etc., can solve the problems of material elasticity not meeting the requirements, difficult bridge coordination deformation, expansion device crack disease, etc., to achieve viscosity reduction , Good effect on high temperature anti-rutting ability

Inactive Publication Date: 2016-04-06
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 warm-mix high-elasticity modified asphalt, including the following components:

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

[0027] 1. Put the asphalt in 120℃ for 1 hour and wait until the asphalt is in a liquid state.

[0028] 2. Use electric furnace to heat, set the temperature to 175~180℃, 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 SBR is added for high-speed shearing for 30~60min, and resin and TOR rubber stabilizer are added for shearing for 20~30min.

[0029]...

Embodiment 2

[0039] A warm-mix high-elasticity modified asphalt, including the following components:

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

[0041] 1. Put the asphalt in 120℃ for 1 hour and wait until the asphalt is in a liquid state.

[0042] 2. Use electric furnace to heat, set the temperature to 175~180℃, 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 SBR is added for high-speed shearing for 30~60min, and resin and TOR rubber stabilizer are added for shearing for 20~30min.

[0043]...

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PUM

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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 a building material, and relates to a warm-mixed high-elasticity modified asphalt, which is mainly used for the elasticity of the asphalt and reduces the construction temperature of the asphalt, and is suitable for seamless bridge expansion joint fillers for bridges. Background technique [0002] Warm mixing technology reduces the mixing degree of asphalt by adding certain additives to the asphalt or using special technology. Compared with traditional asphalt, the construction temperature of warm mix asphalt can be reduced by 30~60℃. The lowering of the asphalt construction temperature can not only reduce energy consumption during production, reduce the emission of carbon dioxide, smoke and dust, etc., effectively protect the surrounding environment, but also protect the health of construction workers and extend the service life of construction equipment. [0003] Expansion joints are telescopic devices installed between adjacent bea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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