Sustainable roller-compacted concrete pavement; a solution to reduce carbon dioxide footprint

Publish Year: 1399
نوع سند: مقاله کنفرانسی
زبان: English
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تاریخ نمایه سازی: 27 دی 1399

Abstract:

Abstract Modern civil engineering projects put more emphasis on sustainable and environmentally friendly construction. Concrete pavements contribute a considerable amount of carbon dioxide (CO2) to the atmosphere due to the use of Portland cement. Among different kinds of concrete pavement, Roller Compacted Concrete Pavement (RCCP) is a durable, economical, and eco-friendly type of concrete pavement. However, mass production of RCCP for infrastructure development may lead to a large amount of CO2 emissions. Therefore, it is very vital to identify a substitution for the cement to make a more cost-effective and environmentally friendly RCCP. In this study, the possibility of using fly ash (FA) and ground granulated blast-furnace slag (GGBFS) as cement replacement in RCCP is investigated. The use of FA and GGBFS in RCCP mixtures reduced the global warming potential (GWP) up to around 40%. Also, the use of FA and GGBFS in RCCP have had a great effect on compressive strength, water absorption anddensity. Therefore, it can be concluded that durable and eco-friendly RCCP with suitable hardened state properties with low CO2 production could be produced by incorporating FA and GGBFS as a cement replacement by 45% and 30%, respectively.

Keywords:

Roller Compacted Concrete Pavement , sustainability , Fly ash , ground granulated blast-furnace slag , CO2 emissions

Authors

Mohammad Hashemi

Faculty of Civil Water and Environmental Engineering, Shahid Beheshti University, Tehran, Iran

Amir Ahrari

Civil and Environmental Engineering, University of Maryland, USA, Manager of Infrastructure Asset Management Group at Createch Group, Principal Advisor at AMTEX LLC

Iman Asadi

School of Mechanical Engineering, College of Engineering, University of Tehran, Iran