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Method for calculating dynamic stability of modified asphalt mixture

A calculation method, a technology of modified asphalt, applied in the direction of applying repeated force/pulsation force to test the strength of materials, complex mathematical operations, etc., can solve problems such as errors, fluctuations in deformation data, etc., to solve large calculation errors and improve accuracy , the effect of improving the accuracy of the research

Active Publication Date: 2019-04-30
苏州规划设计研究院股份有限公司
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Problems solved by technology

In addition, the deformation data collected by the rutting test often fluctuates up and down, which will lead to greater errors

Method used

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  • Method for calculating dynamic stability of modified asphalt mixture
  • Method for calculating dynamic stability of modified asphalt mixture
  • Method for calculating dynamic stability of modified asphalt mixture

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[0074] In order to further understand the present invention, the preferred solutions of the present invention are described below in conjunction with specific examples, but it should be understood that these descriptions are only for further illustrating the present invention, and cannot be construed as limiting the claims of the present invention.

[0075] In order to further understand the present invention, in this embodiment, SBS modified asphalt is taken as an example for illustration, but it should be understood that the calculation method of the present invention is not limited to SBS modified asphalt, and the calculation method of the present invention is also applicable to other types of modified asphalt Sexual asphalt.

[0076] 1. Raw materials and test equipment

[0077] The raw materials are factory-mixed modified asphalt mixed with SBS (mass fraction 4.0%) made by Suzhou Sanchuang Pavement Engineering Co., Ltd. and basalt gravel aggregates from Lai'an County, Anhu...

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Abstract

The invention relates to a method for calculating dynamic stability of the modified asphalt mixture. The method comprises steps that (1), data automatically read by rutting software in a rutting testis inputted into original software for nonlinear function fitting to obtain an equation y=f(x); (2), an x0 value of a Lagrangian median point of the fitted nonlinear function curve from 0 min to 60 min is solved, and the t1 is any point in the period from x 0 of the Lagrange median to 45 minutes or an approximate value of the x 0 value of the Lagrangian median point; (3), t2 is selected, and the t2 is any point in the T1 + 15 min to 60 min period; (4), the mixture flow section area deltaS of the rutting curve is calculated based on a formula as described in the specification; and (5), the dynamic stability DS1 is calculated based on a formula as described in the specification. The method is advantaged in that the dynamic stability is calculated through the mixture flow section area of therutting curve, and a problem of large calculation error of the dynamic stability of the modified asphalt mixture is solved in a targeted manner.

Description

technical field [0001] The invention relates to a method for calculating the dynamic stability of the rutting performance of road modified asphalt mixture. Background technique [0002] As a widely used road engineering material, asphalt provides essential properties for the long-term normal use of the road surface, such as anti-seepage, anti-leakage, stability, flexibility, and smoothness of the road surface. However, due to the characteristics of asphalt's own structure, it is more sensitive to factors such as temperature and load, lacks excellent engineering performance, and has poor elasticity and aging resistance. Using certain technical means to blend the base asphalt with the modifier, so as to obtain a new, high-performance modified asphalt. After the ordinary asphalt is modified, it can obviously make up for many performance defects. In practical application, the engineering performance of modified asphalt pavement shows obvious enhancement. [0003] Modified asp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/34G06F17/15
CPCG01N3/34G06F17/15
Inventor 潘铁沈菊男
Owner 苏州规划设计研究院股份有限公司
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