Laboratory evaluation of biosolids stabilized with demolition wastes as an embankment fill material

作     者：Arulrajah, A. Maghool, F. Horpibulsuk, S. Bo, M.W. Shen, S.L. 

作者机构：Department of Civil and Construction Engineering Swinburne University of Technology HawthornVIC3122 Australia School of Civil Engineering Center of Excellence in Innovation for Sustainable Infrastructure Development Suranaree University of Technology Nakhon Ratchasima30000 Thailand Sarafinchin Inc. Ltd TorontoON Canada Department of Civil Engineering Ocean and Civil Engineering School of Naval Architecture Shanghai Jiao Tong University Shanghai200240 China 

出 版 物：《Lowland Technology International》 (Lowland Tech. Int.)

年 卷 期：2018年第20卷第2期

页      面：155-160页

核心收录：

基　　金：The third author is grateful to the Thailand Research Fund under the TRF Senior Research Scholar program Grant No. RTA5980005 and Suranaree University of Technology 

主　　题：Sewage sludge 

摘      要：Biosolids (Bio) are air-dried sewage sludge from wastewater treatment plants. Stockpiles of Bio are rapidly increasing around the globe. The primary aim of this paper was to evaluate the potential for Bio stabilized with demolition wastes as an embankment fill material. This laboratory evaluation study was undertaken to evaluate the geotechnical properties of Bio when stabilized with various percentages of demolition wastes, being Crushed Brick (CB) and Crushed Concrete (CC). The standard compaction results indicated that the dry density of Bio increased with the addition of both demolition wastes. The optimum moisture content of Bio was found to consistently decrease with increasing amounts of demolition wastes. The gradation, pH value and specific gravity of Bio samples improved with the addition of demolition wastes. The California Bearing Ratio (CBR) value of Bio samples was increased with the addition of CB and CC, with the optimum value found to be achieved with 50% CC content (Bio50/CC50). The positive outcomes of this research project will potentially enable Bio to be used in combination with demolition wastes in embankment fill applications. This sustainable approach will reduce the demand for virgin materials and will potentially divert significant quantities of these waste materials from landfills and into a high value embankment fill material. © 2018 International Association of Lowland Technology. All rights reserved.