蓄盐沥青混合料与冰层粘结程度评价方法探究
Research on the method of evaluating the degree of bonding between salt-storage asphalt mixtures and ice layer
邹桂莲 1陈启 1张园 1虞将苗 1张达民2
作者信息
- 1. 华南理工大学 土木与交通学院,广州 510641
- 2. 上海市政工程设计研究总院集团广东有限公司,广东 深圳 518048
- 折叠
摘要
为了能更精确地评价蓄盐沥青混合料与冰层的粘结程度,通过对拉拔头、冰层冻结方式、拉拔方式等方面进行改进,采用粘结强度和残冰率作为蓄盐沥青混合料与冰层粘结程度的评价指标,开发出一种基于马歇尔试件全断面的试验方法.试验结果表明,试件与冰层之间的粘结强度及残冰率随温度降低而增加,蓄盐沥青混合料在-10℃以内能降低试件与冰层的粘结强度30％以上,-7℃的粘结强度相比于普通沥青混合料减小约50％,-9℃以内残冰率减小比例均大于50％.冰层与试件粘结强度的测量准确度随残冰率的增大而降低,建议在-10℃内采用本试验方法.开发的评价试件与冰层粘结程度的试验方法区分度较高,试验的变异系数在10％以内,稳定性较好.
Abstract
To more accurately evaluate the adhesion degree between salt-storage asphalt mixture and ice layer, this research develops a test method based on a full cross-section of a Marshall specimen by improving the pulling head, ice layer freezing method and pulling mode, with adhesion strength and residual ice ratio as evaluation indexes.Results show the adhesion strength and residual ice ratio increase with decreasing temperature.When the temperature is above - 10℃, salt-storage asphalt mixture decreases the adhesion strength of the specimens and ice layer by over 30％.At a temperature of -7℃, the adhesion strength is reduced by approximately 50％ compared to normal asphalt mixtures.Additionally, at temperatures below -9℃, the residual ice ratio reduction rate is more than 50％.The accuracy of measuring the adhesion strength between the ice layer and the specimen decreases when the residual ice ratio increases.This testing method is only advised when the temperature exceeds -10℃.The self-developed test method used to assess the adhesion degree between the ice layer and the specimen exhibits a significant level of distinction, and the variation coefficient of the test remains within 10％, demonstrating a high stability.
关键词
蓄盐沥青混合料/冰与试件粘结强度/抑冰性能评价方法/蓄盐抑冰剂Key words
salt-storage asphalt mixture/adhesion strength between ice layer and mixture/evaluation method of deicing performance/salt-storage additive引用本文复制引用
基金项目
国家自然科学基金(52178426)
佛山市科技创新团队专项(2120001010776)
出版年
2024
国家科技期刊平台
NSTL
万方数据