道面混凝土抗冻耐久性设计研究  

Studies on antifreeze durability design of pavement concrete

作　　者：付亚伟[1] 蔡良才[1] 王硕太[1] 康笑楠[1] 邸利军 

机构地区：[1]空军工程大学工程学院,陕西西安710038 [2]中航第十工程总队,河北保定071051

出　　处：《新型建筑材料》2010年第9期9-13,共5页New Building Materials

基　　金：军队重点科研项目(KH0717001)

摘　　要：通过测试不同配合比混凝土试块的含气量、工作性、强度和冻融循环性能,研究道面混凝土抗冻耐久性设计参数和方法。结果表明,道面混凝土基于环境温度的四级环境分级宜为严寒地区、寒冷地区、微冻地区和非冰冻地区,相应的混凝土抗冻等级分别为F300、F200～F300、F50～F150和F50,4个抗冻等级下道面混凝土的最大水灰比分别为0.44、0.45、0.46和0.46,最小水泥用量为280 kg/m3,含气量为(4.0±0.5)%、(3.0±0.5)%、(2.5±0.5)%,其中非冰冻地区对混凝土含气量不作要求。提出了基于确定设计参数的道面混凝土抗冻耐久性设计方法和流程,能够保证道面混凝土的工作性、强度和抗冻耐久性。Antifreeze durability design parameters and method of pavement concrete were studied by testing the air content, workability,strength and freeze-thaw cycle performance of concrete specimens of different mixes. The results revealed that the fourclass environment grades of pavement concrete based on environmental temperature should be frost area, cold area, less cold area and no-freezing area, relevant antifreeze grades should be F300, F200-F300, F50-F150 and FS0, maximal W/C should be 0.44, 0.45, 0.46 and 0.46,minimum cement quantity should be all 280 kg/m^3,air content should be （4.0±0.5）%, （3.0±0.5）%, （2.5±0.5）%,no requirement on air content is asked in no-freezing area,and antifreeze durability design method and flow based on such parameters were also given,which can assure the workability, strength and antifreeze durability of pavement concrete.

关 键 词：道面混凝土 抗冻耐久性 环境分级 抗冻等级 设计参数与方法 

分 类 号：U414.18[交通运输工程—道路与铁道工程]