Variation in physical and environmental properties of recycled concrete aggre- gates from C&D waste in Delhi

Author(s): Christian J. Engelsen, Harsha Meenawat, Arun Kumar Sharma, Gaurav Bhatiani, Kshemendra Nath P, Monica S. Nodland
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials, Systems and Structures (SMSS2019) New Generation of Construction Materials
Editor(s): Marijana Serdar, Nina Štirmer, John Provis
ISBN: 978-2-35158-217-6,
Vol 1. ISBN: 978-2-35158-223-7
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 304-310
Total Pages: 7
Language : English

Abstract: Construction and demolition waste (CDW) is one of the biggest waste streams globally. The heavy inorganic part (from concrete and masonry) could be processed and refined into recycled aggregates. The Burari C&D waste recycling facility is located in the north of Delhi and is currently one of three recycling plants operating in Delhi. In relation to the Indo-Norwegian quality assessment program, the physical and environmental properties have been studied.
The physical, chemical and environmental properties determined over time were found to be relatively stable during the extensive sampling periods. Most of the parameters were complying to the requirements in IS 383. For some parameters, such as specific gravity and fines content, small modifications in the recycling process will decrease the fine particle content to the desired level. However, RCA with higher contents can be used in other applications like for example concrete block production.
The contents of inorganic and organic dangerous substances were found to comply with the strictest soil criteria (class I) in Norway. Cr(total) exceeded the criteria. However, most of the chromium was present on the trivalent form, Cr(III), which has low solubility in the neutral to mildly basic pH region.

Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00