Experimental study on the utilization of waste foundry sand as embankment and structural fill

7th Global Conference on Materials Science and Engineering

工业技术（总论）;材料科学

Iqbal, M.F.^1^2 ; Liu, Q.F.^1^2 ; Azim, I.^1^2

State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, China^1

Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration (CISSE), Shanghai, China^2

关键词: California bearing ratio;    Chemical compositions;    Friction angles;    Maximum dry density;    Metalcasting industries;    Optimum moisture content;    Replacement level;    Waste foundry sands;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/474/1/012042/pdf
DOI  :  10.1088/1757-899X/474/1/012042

来源: IOP

【 摘 要 】

Metal casting industries, either ferrous or non-ferrous, produce a large quantity of the waste foundry sand (WFS). Currently, it is either discarded to landfill or collected by waste organizations to extract iron remnants after washing. This research evaluates the reuse of WFS as a replacement of sand in structural fill and embankments. Sand was used to replace WFS at a replacement level of 0, 4, 6, 8 and 10% by weight. Geotechnical and environmental tests were performed to assess the durability and physical properties of WFS samples. Features like the gradation and friction angle were similar for the samples having varying sand percentages. Moreover, the California bearing ratio indicated that WFS having 10% sand replacement will make the hardest fill material. However, it is recommended to use WFS with 6% sand replacement, since it best meets the criteria of specific gravity, optimum moisture content, maximum dry density, permeability and the California bearing ratio for structural fill, embankment and road sub-base material. The chemical composition of WFS indicated the absence of any hazardous material, which may hinder its use as fill material.