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Composite modified asphalt from thermoplastic butylbenzene rubber and tyre rubber powder and preparation thereof

A technology for compounding modified asphalt and styrene-butadiene rubber, which is used in building components, building insulation materials, buildings, etc.

Active Publication Date: 2009-11-25
CCCC THIRD HIGHWAY ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many types of adhesive layer materials used in China, but none of them can fully meet the performance requirements of the adhesive layer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: the performance parameter of 4%SBS+4%GRT combination

[0033] 1. The penetration at 25°C is (100g, 5s; 0.1mm) 40;

[0034] 2. The softening point is 67.8°C (ring and ball method);

[0035] 3. The elongation value is 15.7cm;

[0036] 4. The Brookfield rotational viscosities at 135°C, 160°C, and 175°C are 7400cp, 1430cp, and 492.5cp, respectively.

Embodiment 2

[0037] Embodiment 2: the performance parameter of 10%SBS+6%GRT combination

[0038] 1. Penetration (100g, 5s; 0.1mm) at 25°C is 35;

[0039] 2. The softening point is 89.3°C (ring and ball method)

[0040] 3. The elongation value is 29.9cm;

[0041] 4. The Brookfield rotational viscosities at 135°C, 160°C, and 175°C are 9587cp, 2440cp, and 685cp, respectively.

Embodiment 3

[0042] Embodiment 3: the performance parameter of 10%SBS+12%GRT combination

[0043] 1. Penetration (100g, 5s; 0.1mm) at 25°C is 43;

[0044] 2. The softening point is 104°C (ring and ball method);

[0045] 3. The elongation value is 27.0cm

[0046] 4. The Brookfield rotational viscosities at 135°C, 160°C, and 175°C are 24125cp, 6213cp, and 3355cp, respectively.

[0047] According to the comparison of test data, the performance parameters of the combination of 10% SBS+6% GRT are the best. This composite modified asphalt combines the good high and low temperature performance, aging resistance, fatigue resistance and Tire rubber powder (GRT) modified asphalt has the advantages of anti-aging, anti-fatigue, high viscosity, and anti-crack. It can be used on the bonding layer to increase the shear strength between layers.

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PUM

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Abstract

The invention discloses a composite modified asphalt from thermoplastic butylbenzene rubber and tyre rubber powder and a preparation thereof. The composite modified asphalt is formed by compounding the 4% to 10% of plastic butylbenzene rubber that is externally added based on mass proportion and 4% to 10% of tyre rubber powder that is externally added based on mass proportion; the preparation method includes twice continuous shearing process and twice growth process and drying process. This composite modified asphalt is combined with the advantages that the thermoplastic butylbenzene rubber modified asphalt has excellent high-low temperature performance, aging resistant, fatigue resistance and the tyre rubber powder modified asphalt has aging resistance, fatigue resistance, high adhesion and crack resistance. The composite modified asphalt can improve the interlayer anti-shearing intensity when used in the bonding layer.

Description

technical field [0001] The invention belongs to the technical field of road surface engineering, and relates to a composite modified asphalt made of thermoplastic styrene-butadiene rubber and tire rubber powder and a preparation method thereof. Background technique [0002] The composite pavement structure of asphalt concrete surface layer (AC) laid on the continuous reinforced concrete pavement (CRC) combines high bearing capacity of cement concrete pavement, anti-rutting, long service life and comfortable driving of asphalt concrete pavement, low noise and easy maintenance The advantages of the two pavement structures. However, asphalt concrete and cement concrete are two different pavement materials, and the friction resistance on the joint surface of layers is much lower than that of the asphalt mixture itself, that is, the friction resistance on the joint surface of asphalt concrete layer and cement concrete layer is much lower than that of asphalt Due to the frictiona...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L9/06C08L21/00
Inventor 刘朝晖秦仁杰周科峰谢军
Owner CCCC THIRD HIGHWAY ENG