长沙理工大学学报（自然科学版）2026，Vol.23Issue(2)：131-141,11.DOI:10.19951/j.cnki.1672-9331.20260123001
基于混融程度的厂拌热再生沥青混合料水稳定性研究
Study on water stability of recycled hot-mix asphalt mixture based on blending degree
摘要
Abstract
[Purposes]Given the widespread water damage in early pavement distress and its significant restriction on pavement lifespan and service performance,this paper aims to provide a basis for optimizing the design and application of recycled mixtures by analyzing the effect of the blending degree of new and aged asphalt on the water stability of recycled hot-mix asphalt mixture(RHAM).[Methods]First,the blending degree of new and aged asphalt during the hot-mixing process was quantitatively analyzed using a Fourier transform infrared spectrometer(FTIR).Then,the FTIR results were validated using a dynamic shear rheometer(DSR).Finally,the porosity,indirect tensile strength(ITS),and tensile strength ratio(TSR)of the mixtures with different blending degrees were evaluated through freeze-thaw cycle tests.On this basis,the relationship between the blending degree of new and aged asphalt and the water stability of RHAM was established.[Results]Extending the mixing duration and reducing the content of reclaimed asphalt pavement(RAP)can effectively improve the blending degree of new and aged asphalt,thereby enhancing the water stability of the mixture.When the blending degree is greater than 81.6%,the increment in porosity of RHAM decreases with the increase in the number of freeze-thaw cycles.However,under the condition of a low blending degree,the freeze-thaw action leads to a significant increase in porosity and a significant decrease in TSR and water stability.[Conclusions]The blending degree of new and aged asphalt is a key factor affecting the water stability of RHAM.A higher blending degree can significantly improve the resistance of the mixture to water damage.This paper provides a theoretical basis for the mix design and process control of recycled asphalt mixture,which helps to extend the pavement service life and improve its service performance.关键词
再生沥青混合料/混融程度/傅里叶变换红外光谱/冻融循环/水稳定性Key words
recycled asphalt mixture/blending degree/Fourier transform infrared spectrometer/freeze-thaw cycle/water stability分类
交通工程引用本文复制引用
欧阳振欣,宋亮,王乐,陶明文,高杰..基于混融程度的厂拌热再生沥青混合料水稳定性研究[J].长沙理工大学学报（自然科学版）,2026,23(2):131-141,11.基金项目
国家自然科学基金项目(52578520) （52578520）
江西省自然科学基金项目(20232BAB204085) （20232BAB204085）
天山科技创新领军人才项目(2022TSYCLJ0045) （2022TSYCLJ0045）
新疆人才发展基金项目(XJRC-2025-GX-PY-GCS-072) （XJRC-2025-GX-PY-GCS-072）
新疆交通投资有限责任公司科技研发项目(XJJTZKX-FWCG-202411-0737) （XJJTZKX-FWCG-202411-0737）
