详情

原文传递 A RATIONAL APPROACH FOR ESTIMATION OF PRODUCTION TEMPERATURES OF WARM MIX ASPHALT (WMA)

题名：	A RATIONAL APPROACH FOR ESTIMATION OF PRODUCTION TEMPERATURES OF WARM MIX ASPHALT (WMA)
正文语种：	eng
作者：	Nikhil Saboo;Mayank Sukhija;Vivek Pratap Wagh
作者单位：	Department of Civil Engineering IIT Roorkee;Department of Civil Engineering IIT (BHU) Varanasi;Department of Civil Engineering IIT (BHU) Varanasi
摘要：	The present guideline, IRC:SP:101-2019, on the use of Warm Mix Asphalt (WMA) is silent on rational quantification of mixing and compaction temperatures. In this study, a novel workability-based approach is proposed which can be successfully used to determine the production temperatures (mixing and compaction temperatures) for WMA. A workability setup was fabricated and used to develop a simple procedure for estimating the production temperatures of bituminous mixtures. Additionally, an image capturing device was built, and the coating of bitumen over the mineral aggregates was quantified by processing the images through an Android based application. The compaction characteristics were validated using the air-void data of compacted bituminous mixtures, five different warm mix additives, two base bitumen, and two aggregate sources were studied under this experimental program. It was found that the workability approach proposed in this study was able to quantify the mixing and compaction temperatures for different WMA technologies. About 5-25°C and 5-37°C reduction in mixing and compaction temperatures, respectively, were obtained for different WMA technologies. The bitumen coating over the aggregates were similar/better in WMA compared to the control bituminous mixtures. Despite of being produced at lower compaction temperatures, WMA showed similar density range in comparison to the hot bituminous mixtures. Criteria, based on the target air void range, is proposed to estimate the optimum warm mix dosage for the production of WMA.
出版年：	2023
期刊名称：	Indian Highways
卷：	51
期：	3
页码：	36-50