01155773

Component

Incinerator Bottom Ash (IBA) is a residual by-product material produced by sintering municipal solid waste. In the past, IBA presented a widespread waste disposal problem; however, various reuse and recycling approaches have been adopted in recent years to mitigate this problem, as well as to provide a useful alternative to using primary aggregate resources. In this work, IBA waste was mixed with conventional limestone aggregate in an attempt to achieve a blend with acceptable mechanical properties and minimum environmental risks for use in road foundation layers. Plant-based enzyme treatment was applied in order to improve the behaviour of these IBA-limestone blends. A series of laboratory tests including cyclic triaxial compression tests and Scanning Electron Microscope (SEM) were adopted to determine the materials’ mechanical and microstructure characteristics. Emphasis was on examining the effect of various parameters, such as IBA content, enzyme content, moisture content, and curing time. Results showed that IBA blends gave a favourable performance as road foundation layers in comparison with the control limestone blend. Microstructure and chemical analysis results showed that enzyme addition improved the mechanical properties for the control limestone blend; however, it did not have any noticeable effect on the IBA blends.

01147878

10-0849

English

15p

2010

Transportation Research Board 89th Annual Meeting

DVD

Figures (12) ; References (12) ; Tables (1)

Bottom ash; Compression tests; Limestone aggregates; Microstructure; Modulus of resilience; Recycled materials; Soil mechanics; Triaxial shear tests

Geotechnology

Transportation Research Board Annual Meeting 2010 Paper #10-0849

BTRIS, TRIS, TRB

Jan 25 2010 10:24AM