毕业设计文献翻译--透水混凝土的实验研究.doc

烟台大学土木工程学院 文献翻译 专业 土 木 工 程 班级 土081-4 姓名 学号 指导教师 2012年6月2日文献原文 Experimental Study on Pervious Concrete ABSTRACT Due to its excellent air and water permeability, pervious concrete has become an environmental friendly material in paving application, providing its benefits in reducing the runoff water, enhancing pavement skid resistance by rapid drainage of water, and reducing pavement noise. However, its high porosity and low strength limit its popularity. Based on the concept of pervious concrete, a mix design approach especially for pervious concrete was proposed and an experimental study was undertaken to produce high performance pervious concrete by using gap-graded coarse aggregates and adjusting cement content. The results indicated that pervious concrete with compressive strength up to 33.5 MPa and permeability coefficient of 6 ml/min can be obtained by using this mix design approach. The results also showed that for pervious concrete made with gap-graded aggregates, the strength increases, and the permeability coefficient decreases with the decrease of the aggregate size. There is an optimum content of cement used to coat the coarse aggregates, enhancing the cement-aggregate interface bonding and overall performance of pervious concrete. Key words: Pervious concrete, gap-graded coarse aggregates, penetration coefficient Introduction Pervious concrete began its earliest application in Europe in the 19th century because it uses less cement than conventional concrete. Especially after World War II, cement became scarce and pervious concrete became the best material for housing construction in the world except America. Until the 1970’s, pervious concrete was introduced to the United States. Its use began not as a cheaper substitute for conventional concrete, although that was an advantage, but for its permeability characteristics. The problem encountered in America was that of excessive runoff from newly constructed areas. Because