详情

原文传递 IMPACT OF RAP CONTENT IN FOAM BITUMEN MIX PERFORMANCES

题名：	IMPACT OF RAP CONTENT IN FOAM BITUMEN MIX PERFORMANCES
正文语种：	eng
作者：	FADAMORO OLUWAFEMI FESTUS;DEVESH TIWARI;SIKSHA SWAROOPA KAR;A. P. SINGH
作者单位：	Academy of Scientific and Innovative Research Ghaziabad Uttar Pradesh;CSIR- Central Road Research Institute New Delhi;CSIR- Central Road Research Institute New Delhi;Academy of Scientific and Innovative Research Ghaziabad Uttar Pradesh
摘要：	In today's age, Cold Recycling using Foam Bitumen (FB) is one of the alternative solutions for the maintenance or rehabilitation of heavily trafficked pavement. Foam Bitumen (FB) is produced by combining hot bitumen with carefully controlling flow of cold water and air within a special expansion chamber. The produced FB has a lower viscosity than its liquid state and its volume expands up to 20 times of its original volume which makes it easy and suitable to get mixed with aggregates at ambient temperature. The performance study of Foam Bitumen mixes (FBM) has been presented in this paper with different percentage of Reclaimed Asphalt Pavement (RAP) material. RAP materials comprise of bitumen with aggregates. It can be used as aggregate in road construction when it is appropriately milled and screened. This research has been carried out in four stages: material characterization, foaming characterization, mix design for determination of Optimum Foam Bitumen Content (OFBC) at different RAP % and performance of mix at OFBC. Four different percentage of RAP material has been considered in the present study. To find out OFBC, the foam bitumen is varied from 2 to 4%, in an increment of 0.5%, by weight of aggregate. Both dry and wet Indirect Tensile Strength (ITS) test was carried out on each foam mixed samples to find the OFBC. Mix performance results show that resilient modulus values at 25℃ and 35℃ temperature increase with the increase in percentage of RAP material up to 60% and then decreases for 90%. This can be attributed to better aggregate interlock in 60% RAP mixture when compared to 90% RAP mixture. Dynamic Creep test results on FBM show that the rutting resistance increases when there is an increase in the percentage of RAP material, indicating better rutting resistance. The results show that RAP material can be successfully incorporated into FBM which will help in reducing road construction costs as well as recycled huge industrial waste (RAP).
出版年：	2021
期刊名称：	Indian Highways
卷：	49
期：	6