Recycling Application of the Construction Waste in Silt Subbase: A Case Study
With the urbanization process, enormous construction wastes (CW) are produced, which were usually disposed in landfill in the past, resulting in waste of resources and appropriation of land. To recycle CW, this investigation aims to treat CW as the subbase materials instead of traditional backfill in embankment engineering. To achieve this objective, CW was first crushed into appropriate size, then mixed with silt and cement referring the field procedure to prepare the samples with various CW proportions (CWP). Hereafter, basic performances including compactability, unconfined compression shearing strength, California Bearing Ratio were conducted. Results show that the engineering behaviour of silt soils is significantly improved by the CW incorporation. The maximum dry density of the mixture increases with of the CWP, and the largest maximum dry density is obtained when CWP is 50%. UCS and CBR at the maximum dry density with 50% CWP and after 7-day’s curing is about 6.6 and 10.0 times of compacted silt just treated by cement, suggesting that this mixture can satisfy the requirement of subbase materials.
KeywordsConstruction waste Cement treated soil Subbase performance Skeleton-agglutinant-infilling system
This study is supported by the National Natural Science Foundation of China (Grant No. 41572280) and Postgraduate Research & Practice Innovation Program of Jiangsu Province (Grant No. SJCX17-0044).
- 1.Yuan J, Huang Y (2017) Recycling Construction and demolition waste based on LEED — NC V4.0(MR). Build Energy Effi. 45(312):125–128Google Scholar
- 2.Zhang CL, Sun YZ (2016) Multi-level utilization research on construction wastes. Bull Chin Ceramic Soc 35(7):2149–2152Google Scholar
- 3.Pereza P, Agrelab F, Herradorc R, Ordonez J (2013) Application of cement-treated recycled materials in the construction of a section of road in Malaga, Spain. Constr Build Mater 44:594–599Google Scholar
- 4.Farias A, Fucale S, Alexandre D.G (2015) Technical and economic analysis of construction and demolition waste used in paving project. Electron J Geotech Eng 5939–5948Google Scholar
- 6.Coli N, Berry P, Boldini D, Runo R In situ large size non conventional shear tests for the mechanical characterization of a bimrock in The Santa Barbara open pit mine (Italy). The 43rd US Rock MechanicsGoogle Scholar
- 7.Li SK (2014). Research on the Application of Construction Waste in Highway Subgrade. Chang’an University, Xi’an, ChinaGoogle Scholar
- 8.GB/T 50145-2007 (2007) Standard for engineering classification of soil. China Communications Press, BeijingGoogle Scholar
- 9.Liu JF, Xu J, Gao CY (2007) Study on strength effects of dry density and granularity on earth and rock mixtures. Chin J Rock Mech Eng 26(S1):3304–3310Google Scholar
- 10.JTG E51-2009 (2007) Test Methods of Materials Stabilized with Inorganic Blinders for Highway Engineering. China Communications Press, BeijingGoogle Scholar
- 11.JTG E40-2007 (2007) Test method of soil for highway engineering. China Communications Press, BeijingGoogle Scholar
- 12.JTG D30-2015 (2015) Specifications for Design of Highway Subgrades. China Communications Press, BeijingGoogle Scholar