乳化沥青应广泛应用于城市道路养护维修.rar

乳化沥青应广泛应用于城市道路养护维修
 
   乳化沥青是将粘稠沥青加热到流动状态，再经高速高心、搅拌、剪切等机械作用分裂为细微的液滴，分散在含有乳化剂一稳定剂的水溶液中。液滴上带有阳离子电荷的乳化沥青称为阳离子乳化沥青，简称乳化沥青。近年来，乳化沥青在国外发展很快，在国内也有较大的发展，郑州市已经开始在道路养护维修中广泛应用。乳化沥青用于道路养护施工的优势是很多的。
   其一，乳化沥青可提高路面质量。因为阳离子乳化沥青中的液滴上带有正电荷，而矿料上带有负电荷，由于异性相吸，沥青液滴很快就枯附在矿料上，这种好的粘附性使沥青能够均匀地分布在矿料表面。再者，乳化沥青在施工中不需要反复加热，不会造成老化。所以乳化沥青路面有好的稳定性和耐久性，用在城市道路中可延长道路的使用寿命，降低城市道路的维修频率，节约资金。
   其二，乳化沥青具有流动性，做粘层油时，它的沥青含量可以调整，易喷洒均匀，不会出现象用热沥青做粘层油时，有些地方沥青过少，没有粘结作用，而且会烧伤行人。
   其三，在城市道路施工中，通常是把拌好的热料用汽车从搅拌厂运到摊铺现场。热料冒着烟，散发着有毒的气体，势必污染周围环境和危害人体健康。而乳化沥青混合料是用冷铺法施工的，不需要加热，施工人员不用踩着滚烫的热沥青混合料，在上面蒸烤，不会被烧伤，安全得到保障。没有刺鼻气味，对净化空气、治理环境有促进作用。
   其四，采用乳化沥青施工，矿料中可含有一定水，无须烘干，因此乳化沥青混合料能在下雨之后立即摊铺，缩短了下雨而停工的时间，加速了城市道路的建设。
   其五，乳化沥青不但可用在新铺的沥青路面上，也可以用在
Emulsified asphalt should be widely used in urban road maintenance
 
   Emulsified asphalt is heated to a viscous flow state, and then by high speed and high heart, mixing, shearing and other minor mechanical role of split droplets, dispersed in the presence of a stabilizer emulsifier solution. Droplets with cationic charge on the emulsified asphalt as cationic emulsified asphalt, emulsified asphalt for short. In recent years, rapid development in foreign countries emulsified asphalt, in the country has considerable development, Zhengzhou City, has begun widely used in road maintenance. Emulsified asphalt used for road maintenance and construction of the advantages are many.
   First, emulsified asphalt can improve the surface quality. Cationic emulsified asphalt as droplets on a positive charge, while the negative charge on the mineral aggregate, because opposites attract, asphalt droplets dry quickly attached to the mineral aggregate, such a good adhesion to asphalt can be evenly distributed in the mineral aggregate surface. Furthermore, the emulsified asphalt in the construction does not require repeated heating and will not cause aging. Therefore, the stability of emulsified asphalt pavement and good durability, with a road in the city to extend the life of the road in the lower frequency of city road maintenance, save money.
   Second, the emulsified asphalt has a liquid, so viscous layer of oil, its asphalt content can be adjusted, easy to spray evenly, will not do out the phenomenon of viscous layer with hot asphalt oil, too little asphalt in some places, there is no binding effect, pedestrians and will burn.
   Third, the urban road construction, usually to the marinated hot car from the mixing plant material transported to the paving site. Smoldering hot material, exudes a poisonous gas, will inevitably contaminated the environment and endanger human health. The emulsified asphalt is cold laying of construction, no need for heating, construction workers without stepping on hot hot asphalt mixture, in the above Zhengkao, will not be burned, security is guaranteed. No pungent smell of clean air, environmental management has facilitated.
   Fourth, the use of emulsified asphalt construction, mining compound may contain some water, not drying, it can be emulsified asphalt paving immediately after rain shortened the rain stoppage time, accelerated construction of urban roads.
   Fifth, emulsified asphalt can be used not only in the newly paved asphalt can also be used in