对路面混凝土抗冻性试验和评价方法的探讨  

Discussion on the Methods of Freezing-thawing Test and Evaluation of Pavement Concrete

作　　者：洪锦祥[1] 黄卫[1] 缪昌文[2] 秦晓东 

机构地区：[1]东南大学交通学院,江苏南京210096 [2]江苏省建筑科学研究院,江苏南京210008 [3]中建一局建设发展公司,北京100012

出　　处：《公路交通科技》2006年第7期14-18,共5页Journal of Highway and Transportation Research and Development

基　　金：江苏省自然科学基金资助项目(BK2004155)

摘　　要：在分析冻融作用对混凝土强度、疲劳寿命影响的基础上,结合路面混凝土的使用要求、受力和破坏方式、设计标准和控制指标等特点,指出了现行路面用水泥混凝土冻融试验方法和评价方法中的不足。认为以质量损失率5%、相对动弹性模量60%作为混凝土冻融破坏的临界值过于宽松,建议降低质量损失率的值,以抗折强度损失率替换相对动弹性模量作为路面混凝土的抗冻性评价指标,或相应提高相对动弹性模量的临界值。The influence of freezing-thawing action on the strength and fatigue life of pavement concrete is analysed in this paper. Especially, the shortages of the current freezing-thawing test and evaluation methods are reviewed with consideration of on-site application requirement, characteristics of the design and speciality of bearing capacity ＆ failure of pavement concrete. The validity of the criterion of 5% of mass loss and 60% for relative dynamic modulus of elasticity in current test method for the concrete subjected to freezing-thawing action are not appropriate. After analysis, the new criterion are suggested.

关 键 词：路面混凝土 冻融试验方法 评价指标 质量损失率 动弹性模量 临界值 

分 类 号：U414.1[交通运输工程—道路与铁道工程]