铺洒不同融雪剂环境下路面水泥混凝土抗盐冻耐久性分析  

Durability Analysis of Salt Freezing Resistance of Pavement Cement Concrete under Different Snow Melting Agents

作　　者：杜增利 DU Zeng-li(China Railway 19th Bureau Group Mining Investment Co.,Ltd.,Beijing 100071,China)

机构地区：[1]中铁十九局集团矿业投资有限公司

出　　处：《中国市政工程》2020年第1期85-88,98,共5页China Municipal Engineering

摘　　要：为探究水泥混凝土在不同融雪剂盐冻环境作用下的抗冻特性,对4种(氯化钠NaCl、氯化钙CaCl2、醋酸钙镁CMA、硫酸钠Na2SO4)不同种类盐溶液在5种浓度(0%、3%、6%、12%、25%)下的质量损失情况、相对动弹性模量和抗压强度等变化规律进行对比分析。结果表明:不同溶液低浓度下,路面水泥混凝土的起皮、剥落现象严重;高浓度情况下,路面水泥混凝土的起皮、剥落现象越不明显。从质量损失率对比可得:NaCl>CaCl2>Na2SO4>CMA。从相对动弹性模量大小可得:无机盐和有机盐试验组的动弹性模量大于氯盐试验组。从强度大小对比可得:CMA>CaCl2>Na2SO4>NaCl。综合定量和定性分析结果,铺洒融雪剂后的抗冻性能优劣情况依次为CMA>CaCl2>Na2SO4>NaCl(>表示优于)。To explore the frost resistance of cement concrete under the action of different snow melting agents,the mass loss,relative dynamic modulus of elasticity and compressive strength of four kinds of salt solutions(NaCl,CaCl2,CMA,Na2SO4)at five concentrations(0%,3%,6%,12%,25%)are compared and analyzed.The results show that the peeling phenomenon of pavement cement concrete is serious under the condition of low concentration of different solutions,while the peeling phenomenon of pavement cement concrete is less obvious under the condition of high concentration.From the comparison of mass loss rate,it can be concluded that NaCl>CaCl2>Na2SO4>CMA.From the relative dynamic elastic modulus,the dynamic elastic modulus of inorganic salt&organic salt test group is greater than that of chloride salt test group.According to the strength comparison,CMA>CaCl2>Na2SO4>NaCl.According to the results of quantitative&qualitative analysis,the frost resistance of snow melting agent is CMA>CaCl2>Na2SO4>NaCl(>indicates better).

关 键 词：融雪剂 盐冻环境 道路混凝土 耐久性 抗冻性 

分 类 号：U416.216[交通运输工程—道路与铁道工程]