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Dense-graded asphalt concrete with continuous skid-resistant and noise-reduction functions

An asphalt concrete and dense grading technology, applied in the field of dense grading asphalt concrete, can solve problems such as the attenuation of anti-skid and noise reduction performance, and achieve the effects of good bearing capacity and durability, good noise reduction effect, and good bearing capacity.

Active Publication Date: 2012-11-28
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a densely-graded road with continuous anti-slip and noise-reducing performance for the problem that the anti-slip and noise-reducing performance of asphalt concrete pavement gradually attenuates as the aggregate is polished and the pores are blocked. Asphalt concrete

Method used

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  • Dense-graded asphalt concrete with continuous skid-resistant and noise-reduction functions
  • Dense-graded asphalt concrete with continuous skid-resistant and noise-reduction functions
  • Dense-graded asphalt concrete with continuous skid-resistant and noise-reduction functions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Screening of mineral materials: According to "Technical Specifications for Construction of Highway Asphalt Pavement (JTG F40-2004)", various mineral materials are screened. The asphalt is SBS I-D modified asphalt, the functional aggregate prepared in Example 11 is used as the coarse aggregate, machine-made sand and stone chips are used as the fine aggregate, and mineral powder is used as the filler.

[0051](2) Determination of mineral material density: According to "Technical Specifications for Highway Asphalt Pavement Construction (JTG F40-2004)", the apparent relative density and gross volume relative density of various mineral materials were measured.

[0052] (3) Carry out mineral material gradation design according to "Technical Specifications for Highway Asphalt Pavement Construction (JTG F40-2004)", and use the resulting gradation ratio as the volume mix ratio of various mineral materials, and then according to the following formula, each The volume mix rati...

Embodiment 2

[0061] Using the functional aggregate prepared in Example 12, the mineral aggregates were graded according to the densely graded asphalt concrete AC-10, and the rest were the same as in Example 1. The mineral aggregate volume grading ratio and the optimum asphalt ratio are shown in Table 6.

[0062] Its freeze-thaw splitting strength ratio, water immersion residual stability and durability test (including the comparison of anti-skid performance and noise reduction performance before and after use) are listed in Table 7.

Embodiment 3

[0064] Using the functional aggregate prepared in Example 13, the mineral aggregates were graded according to the densely graded asphalt concrete AC-16, and the rest were the same as in Example 1. The mineral aggregate volume grading ratio and the optimal asphalt ratio are shown in Table 6.

[0065] Its freeze-thaw splitting strength ratio, water immersion residual stability and durability test (including the comparison of anti-skid performance and noise reduction performance before and after use) are listed in Table 7.

[0066] Table 6 AC-10, AC-13, AC-16 densely graded asphalt concrete volume ratio

[0067]

[0068]

[0069] * The OGFC-13 type asphalt mixture of comparative example 1 adopts high-viscosity modified asphalt, and the AC-13 type asphalt concrete of comparative example 2 adopts SBS modified asphalt, ** The data in brackets is the nominal size range of coarse aggregate.

[0070] Table 7 Performance comparison of asphalt concrete with different grades

[0...

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Abstract

The invention relates to a dense-graded asphalt concrete with continuous skid-resistant and noise-reduction functions. The dense-graded asphalt concrete is prepared from a coarse aggregate, a fine aggregate, packing and asphalt according to the matching requirements of dense-graded asphalt concrete. The dense-graded asphalt concrete is characterized in that the coarse aggregate comprises the following components in percentage by weight: 0-50% of common coarse aggregate and 50-100% of functional aggregate, wherein the functional aggregate is of a core-shell structure and composed of a porous core matrix and an alkaline surface activated shell layer, the porous core matrix takes mullite as a main ore phase and formed into a continuous phase, air holes are distributed in the continuous phase, the diameters of the air holes are distributed in a multistage mode, and the small holes mainly include micron small holes; and the ore phase of the alkaline surface activated shell layer mainly comprises dicalcium silicate, tricalcium silicate, tricalcium aluminate and tetracalcium aluminoferrite. The dense-graded asphalt concrete disclosed by the invention is good in bearing capacity, excellent in water damage resistance and continuous skid-resistant and noise-reduction functions and good in durability, and has a broad application prospect.

Description

technical field [0001] The invention belongs to the field of road building materials, in particular to a densely graded asphalt concrete with continuous anti-skid and noise reduction functions. Background technique [0002] Asphalt concrete pavement has the characteristics of smoothness, beauty, anti-glare, easy repair, etc., and it is widely used. However, the skid resistance of asphalt concrete pavement gradually decreases as the aggregate is polished, which seriously affects the safety of vehicles. In response to this problem, at present, hard and wear-resistant basalt aggregates are mainly used to replace limestone or granite aggregates to prepare asphalt concrete. However, basalt aggregates also have the problem of smooth surface after the aggregates are polished, and the distribution of basalts is regional. Material costs are higher. Although the open graded wear layer (OGFC) pavement plays a certain role in anti-skid, sound absorption, and noise reduction, the beari...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B14/36C04B38/00C04B111/52
Inventor 王发洲张运华付军董跃黄大凡
Owner WUHAN UNIV OF TECH
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