Evaluation of Gap Aggregate Gradation on Porous Asphalt Concrete

• Main Authors: Jun-pin Wang, 汪峻平
• Other Authors: Jih-min Shiau
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/86547014983696298652

碩士 === 國立成功大學 === 土木工程學系碩博士班 === 96 === The objectives of this study is to investigate the effects of aggregate gradation on the engineering properties and pavement performance of asphalt concrete by changing aggregate gradation and deleting the aggregate sieves number. Setting the aggregate gradation by deleting aggregate sieves number to form a gap gradation. The attempt gradation deletes 3/4”, 1/2”, 3/8”, #4, #8, #16, and #200 sieves. The occupying proportional is deleted by size distribution to other sizes. The PMA3 was used as binder in this study. These mixtures were designed by the Japanese mix design., we carry out performance test of porous asphalt concrete. Based on test results, the gradation and proportion of coarse to fine aggregate are major factor to effect the engineering properties. The asphalt concrete with coarse aggregate and higher air voids will have less stability. Simultaneously, it produces more rutting. Of all these gradation, the gradation deleting 1/2” has the best performance. Suitable the gradation and proportion of coarse to fine aggregate could have positive effects in draining ability,anit-abrasion and rutting ability. Key words：Gap aggregate gradation , Porous asphalt concrete