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Design method for property balance of high viscosity and high elastic stress dissipative materials

A stress-dissipating, high-viscosity technology, applied in the field of road asphalt pavement material manufacturing, can solve problems such as low service life and impact, and achieve reliable results.

Active Publication Date: 2017-02-22
BEIJING MUNICIPAL ROAD & BRIDGE BUILDING MATERIALGRP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Bridge deck pavement has become one of the weakest parts of bridge engineering, and its service life is much lower than that of the main structure of the bridge. Although it is an auxiliary project of the bridge, its service quality has a huge impact on the entire bridge and even the entire road network

Method used

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  • Design method for property balance of high viscosity and high elastic stress dissipative materials
  • Design method for property balance of high viscosity and high elastic stress dissipative materials
  • Design method for property balance of high viscosity and high elastic stress dissipative materials

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Effect test

Embodiment 1

[0034] A new type of high-viscosity and high-elastic stress dissipation material is composed of the following components according to the mass ratio: high-viscosity asphalt binder: aggregate: polyester fiber = 7 ~ 11: 100: 0.03; the aggregate has a particle size of 5 ~ 8mm basalt, machine-made sand with a particle size of 3-5mm, natural sand and mineral powder are composed according to a certain ratio; the aggregate ratio is 8:60:29:3.

[0035] Estimate the appropriate asphalt content OAC of asphalt mixture based on engineering experience 0 , the estimation method is the same as the method for determining the asphalt ratio of hot mix asphalt mixture, the estimated asphalt dosage is 8.5%, and the volume index and Performance index, according to the range requirements of the volume index and performance index, comprehensively determine the optimal amount of asphalt. Among them, the volume index needs to measure the porosity when the number of rotary compaction is 100 times, and t...

Embodiment 2

[0050] A new type of high-viscosity and high-elastic stress dissipation material is composed of the following components according to the mass ratio: high-viscosity asphalt binder: aggregate: polyester fiber = 7 ~ 11: 100: 0.03; the aggregate has a particle size of 5 ~ 8mm basalt, machine-made sand with a particle size of 3-5mm, natural sand and mineral powder are composed according to a certain ratio; the aggregate ratio is 9:59:30:2.

[0051] Estimate the appropriate asphalt content OAC of asphalt mixture based on engineering experience 0 , the estimation method is the same as the method for determining the asphalt ratio of hot mix asphalt mixture, the estimated asphalt dosage is 8.5%, and the volume index and Performance index, according to the range requirements of the volume index and performance index, comprehensively determine the optimal amount of asphalt. Among them, the volume index needs to measure the porosity when the number of rotary compaction is 100 times, and...

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Abstract

The invention relates to a method for determining the optimal consumption of asphalt in a high-viscosity and high-elasticity stress dissipation material. In the design method, the optimal consumption of asphalt is measured by adopting a volume index and a performance index together in mixture design, and the optimal consumption range of asphalt meets the ranges of porosity VV, penetration shear strength, fatigue life and dynamic stability loss rate. In the range, the consumption of asphalt with optimal penetration shear strength performance is P1, the consumption of asphalt with optimal fatigue performance is P2, the consumption of asphalt with optimal dynamic stability loss rate is P3, the endowed weights are respectively weight lambda 1, weight lambda 2 and weight lambda 3 according to the importance of the three performances, and then the optimal value P of asphalt is lambda 1*P1+ lambda 2*P2 +lambda 3*P3. According to the optimal range of the asphalt determined by adopting the method, the performance of the asphalt can meet the requirements of pavement engineering; and the anti-fatigue performance of the stress dissipation material is excellent, the method is reliable, simple and feasible, and the performance of the optimal value is optimal.

Description

technical field [0001] The invention belongs to the technical field of road asphalt pavement material manufacture. The invention particularly relates to a method for determining the optimal amount of asphalt in the high-viscosity and high-elastic stress dissipation material. Background technique [0002] In the 1980s, cement pavement developed rapidly across the country due to its characteristics of high strength, good stability and low construction cost. However, due to the sharp increase in traffic volume and heavy vehicle axle loads, the cement pavement built in the early days is gradually approaching the end of its service life. Diseases occur frequently and maintenance is difficult, which seriously affects road service capabilities and driving safety. With the continuous improvement of my country's economic level, asphalt pavement gradually replaces cement pavement. Adding asphalt pavement to the original cement pavement can take into account the advantages of "white" ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26
Inventor 柳浩杨丽英董雨明王建国李振王真李恩光王宝新
Owner BEIJING MUNICIPAL ROAD & BRIDGE BUILDING MATERIALGRP
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