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EXPERIMENTAL ASSESSMENT OF DENSE BITUMINOUS MACADAM (DBM) BINDER COURSE WITH THE BINDER MODIFIED WITH POLY PHOSPHORIC ACID
| 题名： | EXPERIMENTAL ASSESSMENT OF DENSE BITUMINOUS MACADAM (DBM) BINDER COURSE WITH THE BINDER MODIFIED WITH POLY PHOSPHORIC ACID |
| 正文语种： | 英文 |
| 作者： | V.VINAYAKA RAM; V.VENKAT RAMAYYA; S.KRISHNAIAH; AMARENDRA KUMAR SANDRA4 |
| 作者单位： | Associate Professor, Department of Civil Engineering, Birla Institute of Technology, BITS, Hyderabad; Asst. Professor, Department of Civil Engineering, Mahatma Gandhi Institute of Technology, Hyderabad; Professor & Registrar, Department of Civil Engineering, JNT University, Anantapur, Andhra Pradesh; Associate Professor, IIIT RK Valley Campus, RGUKT, Kadapa, Andhra Pradesh |
| 关键词： | binder；recommend；applications；temperature；modified；literature；conditions；phosphor；climatic；forman |
| 摘要： | Bitumen is used as a binder material in flexible pavement construction apart from its many other applications. This binder exhibits complex behavior with ever varying consistencies at different temperatures. Usually bitumen for paving applications is recommended based variations in pavement / ambient temperatures and other crucial climatic conditions. Hard bitumen grades are recommended in hot regions while the softer ones in colder climatic conditions to resist rutting and stripping failures respectively. Binders obtained from refineries rarely possess adequate softness and stiffness to comply with these requirements. In order to enhance the performance of these binders, it is quite common to modify these with many modifications such as acids, minerals and polymers. It can be found from the literature that these modified binders have been tried and tested in many case studies with varied levels of success. Acid modification is gaining its popularity during the recent past with researchers finding considerable improvement in the performance of these modified binders in the form of increased complex modulus and reduced phase angle. However, studies on the performance of acid modified bitumen on bituminous concrete mixes and in particular for binder courses; Dense Bituminous Macadam (DBM) are very limited in India and elsewhere too. This paper is an attempt to share the experimental observations made on the performance of dense bituminous macadam with Poly Phosphoric Acid (PPA) modified binder. Gradation II DBM, recommended by Ministry of Road Transport and Highways (MoRT&H), India has been selected for investigations in the present research work. The parameters considered for performance assessment are Marshall's Stability, Marshall's Flow value, volume of voids (Vv), Voids Filled with Bitumen (VFB), Voids in Mineral Aggregates (VMA), bulk specific gravity, Indirect Tensile Strength (ITS) and Resilient Modulus. |
| 出版年： | 2019 |
| 期刊名称： | Indian Highways |
| 卷： | 47 |
| 期： | 6 |
| 页码： | 11-19 |
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