A method for predicting creep compliance in low temperature range based on asphalt complex modulus

By constructing a material database and using continuous delayed time spectrum conversion data, combined with the MATLAB interface model, the problems of low efficiency and low precision in the evaluation of the viscoelastic properties of recycled asphalt are solved, and efficient and accurate creep compliance prediction is achieved.

CN119993339BActive Publication Date: 2025-09-30HAINAN UNIV
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Patent Information

Application Number
CN202510058335.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-14
Publication Date
2025-09-30
Estimated Expiration
2045-01-14

AI Technical Summary

Technical Problem

Existing technologies are inefficient and lack calculation accuracy and efficiency when evaluating the viscoelastic properties of recycled asphalt. They ignore the accuracy and simplicity of complex domain calculations, which increases the difficulty of asphalt performance evaluation.

Method used

By building a material database, checking the quality of complex modulus test data, establishing a complex modulus master curve, converting frequency domain data into time domain data using continuous delay time spectrum, and using MATLAB to build an interface creep compliance prediction model, fast and efficient creep compliance prediction can be achieved.

Benefits of technology

It improves the accuracy and engineering practicality of low-temperature creep compliance prediction, reduces systematic prediction errors, simplifies user operations, and improves performance evaluation efficiency.

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Abstract

The present invention is applicable to the field of road engineering technology, and in particular relates to a method for predicting creep compliance in a low-temperature range based on the complex modulus of asphalt. The present invention uses a continuous delay time spectrum to theoretically meet strict viscoelastic conversion conditions, while avoiding the unclear physical meanings of empirical point selection, uneven curves, and negative time spectra that appear in discrete delay time spectra. The continuous delay time spectrum in the present invention is an analytical formula derived from theoretical derivation rather than a numerical solution. Compared with related research at home and abroad, it significantly reduces numerical calculation errors and greatly improves the accuracy of low-temperature creep compliance prediction values. In addition, the interface creep compliance prediction model and coefficient calibration module proposed in the present invention eliminate the need for manual step-by-step calculations in actual applications. Users only need to import complex modulus test data to directly obtain creep compliance values. The model can be calibrated based on an existing database to improve prediction accuracy, significantly improving engineering practicality compared to existing technologies.
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