路面基层材料抗冻融循环性能优化技术

Optimization technology of frost and thaw cycle performance of pavement base material

摘要

在寒冷及高海拔冻融区，路面基层材料受冻融循环影响，易出现性能劣化，缩短路面使用寿命。本文深入探究其劣化机理，从材料组成、结构设计和施工工艺三方面提出优化技术，涵盖降低孔隙率、掺加改性材料等措施，并引入高性能纤维和纳米材料增强效果。以共玉高速公路为案例，经多年运营及监测，验证优化技术使基层抗冻融性能显著提升，裂缝等病害减少，使用寿命延长，成本降低，为同类地区公路建设提供重要参考，推动了相关技术发展。

Abstract

In cold and high-altitude freeze-thaw areas, the performance of pavement base materials degrades due to freeze-thaw cycles, leading to a shortened service life. This paper explores the degradation mechanisms and proposes optimization techniques from three perspectives: material composition, structural design, and construction methods. These techniques include reducing porosity, adding modified materials, and enhancing with high-performance fibers and nanomaterials. Using the Gongyu Expressway as a case study, years of operation and monitoring have shown that these optimization techniques significantly improve the freeze-thaw resistance of the base layer, reduce cracks and other defects, extend the service life, and lower costs. This provides important references for highway construction in similar regions and promotes the development of related technologies.

关键词

路面基层材料 / 冻融循环 / 性能优化 / 工程应用

Key words

pavement base material / freeze-thaw cycle / performance optimization / engineering application

参考文献

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