SMA混合的施工质量控制.doc

SMA混合料的施工质量控制 一 绪论 随着社会经济的发展，车辆的交通运输量尤其是重载车辆的不断增加，社会对道路要求也日益提高，但沥青路面的高温稳定性能、低温抗裂及耐久性(抗疲劳、水稳定性和抗老化性)等路用性能在要求上往往是互相矛盾或相互制约的。为了显著地改善沥青路面的使用性能与使用寿命，采用SMA新结构型再加上改性沥青新材料，并根据当地的气候条件及交通情况进行沥青混合料的配合比设计，是解决上述矛盾的有效途径。 SMA这种新型沥青混合料结构，即沥青玛蹄脂碎石混合料，它最早出现于60年代的联邦德国，在欧洲称为Split Mastix Asphalt，美国则称之为Stone Mastic Asphalt，缩写为SMA，它是在德国浇注式沥青混凝土的基础上发展而来的。所谓改性沥青是指掺加橡胶、树脂、高分子聚合物、磨细的橡胶粉或其它填料等外掺剂或采取对沥青轻度氧化等措施使沥青混合料的性能得以改善而制成的结合料。 陕西交通职业技术学院毕业论文 陕西交通职业技术学院毕业论文 Subsequently, the Anhui Army military Special Branch, in Shanghais Central Intelligence Organization and the Communist party organization in Western Zhejiang Province, sent party backbone, respectively, went to Wu Jiangyan opened the Tomb, Tomb of heroic people, under the leadership of the Communist Party, fear no sacrifice and persevering, goal of the anti-Japanese revolutionary struggle. (A) stationed in Taoyuan area (Tomb of) 1, the new army of the Communist Party of China underground organization in September 1938, the CPC Zhuang Shaozhen (Zhuang Zhen, Nanxun people) by the Deputy Director of the political Department of the army on Deng Zihuis dispatch, operating from Jing County, Anhui Province, the Lake reached the Tomb, its tasks are: looking for reliable object, introduce them to the new, to expand the new team. Zhuang Shaozhen KMT-CPC cooperation as an opportunity, after classmates Yao Bi (Nanxun people, Ren Zhuxi force staff Director), introduced into the Kuomintang government political team, and as a political leader. He used this opportunity to invite progressive youth Hong Haiquan form a political team, at this point, the County Government has just been established, local school, unemployed youth are more quickly absorbed sheng, zhenze, Miaogang, Nanxun, huzhou, more than 20 more than required-Japanese youth. In order to raise the level of political players and the ability to work, Zhuang Shaozhen Xu Temple, is for the establishment of youth ... Political activities will soon attract the attention of the Kuomint