Modified hard asphalt for improving high-temperature performances of pouring type asphalt concrete as well as preparation method of modified hard asphalt and pouring type asphalt concrete

A technology for asphalt concrete and hard asphalt, which is used in building thermal insulation materials, building components, buildings, etc., can solve the problems of high temperature stability and shortage of uncast asphalt mixture, shorten mixing time, improve service life, obtain handy effect

Inactive Publication Date: 2015-03-25
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although scholars at home and abroad have made a lot of explorations on the improvement of cast asphalt concrete in terms of modified hard asphalt, there are still no effective measures to solve the high temperature stability of cast asphalt mixture.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A modified hard asphalt for improving the high-temperature performance of castable asphalt concrete, prepared from raw materials with the following weight ratios:

[0038] 75 parts of SBS (I-D) modified asphalt,

[0039] 20 parts of Trinidad Lake Asphalt,

[0040] Qingchuanyan (NES-1) asphalt 5 parts.

[0041] The 25°C penetration of the SBS (ID) modified asphalt is 40-60 (0.1mm), the 5°C ductility ≥20cm, and the softening point ≥60°C; the Trinidad rock asphalt 25°C needle The penetration is 0~5(0.1mm), the softening point is ≥90℃, the ash content is 33%~38%, and the density is 1.3~1.5(g / cm 3 ); Qingchuanyan (NES-1) asphalt has ash content ≤15%, particle size ≤18μm, and water content ≤2%.

[0042] The preparation method of the modified hard asphalt for improving the high temperature performance of castable asphalt concrete includes the following steps:

[0043] S1. Take a certain quality of SBS (ID) modified asphalt and Trinidad lake asphalt (TLA) as raw materials, and put the ra...

Embodiment 2

[0048] A modified hard asphalt for improving the high-temperature performance of castable asphalt concrete, prepared from raw materials with the following weight ratios:

[0049] 70 parts of SBS (I-D) modified asphalt,

[0050] 24 parts of Trinidad Lake Asphalt,

[0051] Qingchuanyan (NES-1) asphalt 6 parts.

[0052] The 25°C penetration of the SBS (ID) modified asphalt is 40-60 (0.1mm), the 5°C ductility ≥20cm, and the softening point ≥60°C; the Trinidad rock asphalt 25°C needle The penetration is 0~5(0.1mm), the softening point is ≥90℃, the ash content is 33%~38%, and the density is 1.3~1.5(g / cm 3 ); Qingchuanyan (NES-1) asphalt has ash content ≤15%, particle size ≤18μm, and water content ≤2%.

[0053] The preparation method of the modified hard asphalt for improving the high temperature performance of castable asphalt concrete includes the following steps:

[0054] S1. Take a certain quality of SBS (ID) modified asphalt and Trinidad lake asphalt (TLA) as raw materials, and put the ra...

Embodiment 3

[0059] A modified hard asphalt for improving the high-temperature performance of castable asphalt concrete, prepared from raw materials with the following weight ratios:

[0060] 71 parts of SBS (I-D) modified asphalt,

[0061] 25 parts of Trinidad Lake Asphalt,

[0062] Qingchuanyan (NES-1) asphalt 4 parts.

[0063] The 25°C penetration of the SBS (ID) modified asphalt is 40-60 (0.1mm), the 5°C ductility ≥20cm, and the softening point ≥60°C; the Trinidad rock asphalt 25°C needle The penetration is 0~5(0.1mm), the softening point is ≥90℃, the ash content is 33%~38%, and the density is 1.3~1.5(g / cm 3 ); Qingchuanyan (NES-1) asphalt has ash content ≤15%, particle size ≤18μm, and water content ≤2%.

[0064] The preparation method of the modified hard asphalt for improving the high temperature performance of castable asphalt concrete includes the following steps:

[0065] S1. Take a certain quality of SBS (ID) modified asphalt and Trinidad lake asphalt (TLA) as raw materials, and put the ra...

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Abstract

The invention discloses modified hard asphalt for improving high-temperature performances of pouring type asphalt concrete. The modified hard asphalt is prepared from the following raw materials in parts by weight: 70-75 parts of SBS (I-D) modified asphalt, 20-25 parts of trinidad lake asphalt and 4-6 parts of Qingchuan rock (NES-1) asphalt. The invention further discloses a preparation method of the modified hard asphalt. The preparation method comprises the following steps: uniformly mixing the raw material SBS (I-D) modified asphalt with the raw material trinidad lake asphalt to obtain an asphalt mixture after maintaining by heating and continuously maintaining; then, adding the weighted Qingchuan rock (NES-1) asphalt into the asphalt mixture. The invention further discloses pouring type asphalt concrete prepared by the modified hard asphalt. The modified hard asphalt has the beneficial effects of effectively improving the high-temperature stability of the pouring type asphalt concrete, preventing the wheel rutting damages of deck pavement for steel bridges, greatly prolonging the service lives of the bridges and improving the long-term pavement performances of the pavement; moreover, the raw materials are easily available, the cost is reasonable and the process is simple.

Description

technical field [0001] The invention relates to the technical field of road asphalt, in particular to a modified hard asphalt for improving the high-temperature performance of cast asphalt concrete, a preparation method thereof, and cast asphalt concrete. Background technique [0002] Orthotropic steel bridge decks are mostly used in long-span bridges and girder structures of large-span urban viaducts because of their light weight, convenient transportation and erection, and short construction period. The cast asphalt concrete is widely used in the construction of the pavement on the steel bridge deck due to its excellent waterproof performance, low temperature performance, anti-aging performance, anti-fatigue performance and excellent followability to the steel bridge deck. However, the obvious defect of cast asphalt concrete is its insufficient high temperature stability, and the steel bridge deck pavement layer using this concrete generally has rutting disease. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C04B26/26
Inventor 艾长发辛春福阳恩慧邱延峻肖川王福成
Owner SOUTHWEST JIAOTONG UNIV
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