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2011-Sustainable Industrial Processing Summit
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| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 754 pages |
| ISBN: | 978-0-9879917-3-7 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Recycling Of Waste Foundry Sand Steel Slags And Bottom Ash In Cement Bound Mixtures For Road Pavements
Marco Pasetto1; Nicola Baldo2;1UNIVERSITY OF PADUA, Padova, Italy; 2UNIVERSITY OF PADOVA, Padova, Italy;
Type of Paper: Regular
Id Paper: 225
Topic: 12
Abstract:
The paper discusses an experimental analysis concerning cement bound mixtures for road foundations, with an aggregate matrix completely composed by industrial wastes, as foundry sands, electric arc furnace (EAF) steel slags and bottom ash from municipal solid waste incineration (MSWI), combined with different dosages.The research involved a preliminary study of the physical-geotechnical properties of the three different industrial wastes, and a subsequent mechanical characterization of the cement bound mixtures. The mix design has been conducted in terms of Proctor, compression and indirect tensile tests. At the end of the study the dynamic elastic modulus of the mixtures was determined by means of ultrasonic tests, also at different curing periods.The results were completely satisfactory for all the mixtures designed, especially for that characterized by 30% foundry sand, 30% bottom ash and 40% steel slag, which attained 7 days compression strength up to 4.18 MPa and indirect tensile strength up to 0.39 MPa.The experimental results met the main Italian Specifications, so demonstrating the feasibility of using industrial by-products as integral substitutes of the conventional natural aggregates in the production of cement bound granular materials for road foundations.