【作者】 李连志；

【导师】 柳俊哲；

【作者基本信息】 东北林业大学 ， 道路与铁道工程， 2007， 硕士

【摘要】 在冬季，为了保证交通畅通无阻，防止路面因冰雪致滑引起交通事故，常在路面和桥面撤除冰盐，通过降低冰点融化冰雪。目前市场上所使用的除冰盐种类繁多，且大多都是以氯化钠和氯化钙为主的无机盐类；然而，由于以氯盐为主的除冰盐的使用，将导致混凝土的严重剥蚀，其破坏程度远快于普通冻融环境下引起的破坏及其它种类的破坏，从而严重影响路面和桥梁混凝土的使用寿命。本文在除冰盐对混凝土的破坏机理的研究基础上，研究了不同水胶比、孔隙率和粉煤灰等掺合料的混凝土，对道路混凝土的抗盐冻性能的影响及氯离子的渗透性能；配制了抗除冰盐混凝土，并对其力学性能和耐久性进行了测试。通过室内试验测得抗除冰盐混凝土与普通混凝土相比，抗冻性明显提高，可达到试验室300次以上冻融循环，质量损失不超过2.5％，相对动弹性模量不低于91％，氯离子渗透深度不超过11mm。对于在寒冷地区修建高速公路具有很好的指导意义，为我国尽快制订道路混凝土抗盐冻设计规范提供经验。更多还原

【Abstract】 During winter, in order to secure smooth traffic, avoid the accident lead by ice and snow pavement, we normally put deicing salt on the road and bridge pavement, so that to make the ice and snow thaw through lower the freezing point. There are many kinds of deicing salt on the current market, and most of them mainly made up of NaCl and CaCl₂ which are inorganic salt: however, by primarily application of Chlorine as the deicing salt, it will lead serious denudation of concrete, the deterioration is much more bigger than the deterioration under the general freezing and thawing condition or the other kinds of deterioration, thus influence the age of road and bridge concrete seriously.This article base on the research of deicing salt to concrete’s deterioration mechanics, has studied the concrete with different water-cement ratio, porosity and mixed material such as fly ash, the influence on road concrete anti-salt frost performance and permeability of Cl^-; Made up the anti-deicing salt concrete, and carried on the test to its mechanics performance and the durability.Anti- deicing salt’s frost resistant has remarkable improvement compare with the general concrete through the inside experiment, it can reach more than 300 times lab freezing and thawing cycle, loss of mass is no more than 2.5%, relative dynamic modulus of elasticity is no less than 91%, Cl^- osmolity is no more than 11mm. There is very good instruction significance in construction of the cold area highway, it can provide the experience of making the design standard of road concrete anti-salt forst for our country as soon as possible.更多还原