High intensity asphalt modifier for cast asphalt concrete and preparation method thereof

A technology of asphalt modifier and asphalt concrete, which is applied in the direction of building components, building insulation materials, buildings, etc., can solve problems such as rutting, affect the smoothness of the road surface, reduce the service life of the road surface, etc., and achieve strength and stiffness modulus Large, improve the anti-rutting ability, improve the effect of the force state

Active Publication Date: 2010-10-06
CHONGQING ZHONGJIAO ROAD & BRIDGE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the suspended structure and its high asphalt content, the thermal stability of cast asphalt concrete is relatively poor
Under the comprehensive influence of factors such as traffic growth, axle load increase, severe overloading, vehicle channelization traffic, and continuous high temperature weather, cast asphalt concrete pavement is prone to rutting and other diseases, which affects the smoothness of the pavement and reduces the surface layer and pavement. The overall strength of the structure will reduce the anti-skid ability of the road surface, and even affect the safety of high-speed driving due to water accumulation in the ruts, and may also affect the operational stability of the vehicle when overtaking or changing lanes
In addition, the appearance of rutting and other diseases will reduce the service life of the pavement and increase the maintenance cost

Method used

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  • High intensity asphalt modifier for cast asphalt concrete and preparation method thereof
  • High intensity asphalt modifier for cast asphalt concrete and preparation method thereof
  • High intensity asphalt modifier for cast asphalt concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The distribution ratio of high-strength modified asphalt is as follows:

[0022] The component mass percentage is (%)

[0023] Zhonghai 70# Asphalt 82

[0024] High-strength asphalt modifier for pouring asphalt concrete 18

[0025] The composition ratio of high-strength asphalt modifier for castable asphalt concrete is as follows:

[0026] Component mass parts

[0027] Modifier 20 parts

[0028] Enhancer 15 parts

[0029] Viscosity reducer 55 parts

[0030] The modifier is a mixture of one or more of SBS, SIS, SBR, CR, etc., and the ratio between them is not required.

[0031] The reinforcing agent is a mixture of one or more of waste tire rubber powder, rock asphalt, lake asphalt, white carbon black, etc., and the ratio between them is not required.

[0032] Viscosity reducer is a mixture of one or more asphalt viscosity reducers such as Sasobit, SasobitLM, Eapave, and Saisu, and the ratio between them is not required.

[0033] According to the above raw material ratio, the following p...

Embodiment 1

[0036] The performance of the high-strength modified asphalt in Example 1 is shown in Table 1.

[0037] Table 1 Performance of the high-strength modified asphalt in Example 1

[0038]

Embodiment 2

[0040] The group distribution is as follows:

[0041] The distribution ratio of high-strength modified asphalt is as follows:

[0042] The component mass percentage is (%)

[0043] Zhonghai 70# Asphalt 82

[0044] High-strength asphalt modifier for pouring asphalt concrete 18

[0045] The composition ratio of high-strength asphalt modifier for castable asphalt concrete is as follows:

[0046] Component mass parts

[0047] Modifier 45 parts

[0048] Enhancer 8 parts

[0049] Viscosity reducer 47 parts

[0050] According to the above raw material ratio, the following process is installed:

[0051] Step 1: Heat up the Zhonghai 70# bitumen in the bitumen storage tank to 110°C by circulating heating oil and keep it at a constant temperature for 50 minutes for dehydration.

[0052] Step 2: Heat up to 185°C, stir and shear at a speed of 1000r / min, and add high-strength asphalt modifier for pouring asphalt concrete at the same time. After the high-strength asphalt modifier modifier for pouring asphal...

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Abstract

The invention discloses a high intensity asphalt modifier for cast asphalt concrete and a preparation method thereof. The asphalt modifier comprises the following components by weight percent: 20-50% of modifier, 5-20% of reinforcing agent and 30-60% of viscosity breaker. The product of the invention is used as the modifier to prepare high intensity modified asphalt, and the obtained asphalt has higher softening point and hardness (lower penetration degree) and excellent elastic recovery performance and thermal aging property.

Description

Technical field [0001] The invention relates to a high-strength asphalt modifier and a preparation method thereof, in particular to a high-strength asphalt modifier for pouring asphalt concrete and a preparation method thereof. Background technique [0002] Pouring asphalt concrete belongs to suspended densely graded asphalt concrete. The composition of the mixture is characterized by a high amount of asphalt (7%-10%), a mineral powder content of 20%-30% in the mineral aggregate, and a high mixing temperature of the asphalt mixture (200-240°C). Therefore, castable asphalt concrete has the "three highs" characteristics of high mineral powder content, high asphalt content and high mixing temperature. Therefore, the pouring asphalt concrete pavement is basically free of voids after being formed, and there will be no defects and diseases due to insufficient compaction; it is impermeable and does not absorb water, so it is resistant to deicing salt solutions such as freeze-thaw trans...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L9/06C08L11/00C08L21/00C08K13/02C08K3/36
Inventor 陈仕周梁志中张文吴家伟吴鹏
Owner CHONGQING ZHONGJIAO ROAD & BRIDGE TECH
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