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Materials 2013, 6(8), 3139-3159; doi:10.3390/ma6083139
Article

Use of Cement Kiln Dust, Blast Furnace Slag and Marble Sludge in the Manufacture of Sustainable Artificial Aggregates by Means of Cold Bonding Pelletization

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Received: 20 May 2013 / Revised: 16 July 2013 / Accepted: 22 July 2013 / Published: 25 July 2013
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Abstract

In this work, three different samples of solid industrial wastes cement kiln dust (CKD), granulated blast furnace slag and marble sludge were employed in a cold bonding pelletization process for the sustainable production of artificial aggregates. The activating action of CKD components on the hydraulic behavior of the slag was explored by evaluating the neo-formed phases present in several hydrated pastes. Particularly, the influence of free CaO and sulfates amount in the two CKD samples on slag reactivity was evaluated. Cold bonded artificial aggregates were characterized by determining physical and mechanical properties of two selected size fractions of the granules for each studied mixture. Eighteen types of granules were employed in C28/35 concrete manufacture where coarser natural aggregate were substituted with the artificial ones. Finally, lightweight concretes were obtained, proving the suitability of the cold bonding pelletization process in artificial aggregate sustainable production.
Keywords: cement kiln dust; granulated blast furnace slag; marble sludge; cold bonding pelletization process; sustainable artificial aggregates cement kiln dust; granulated blast furnace slag; marble sludge; cold bonding pelletization process; sustainable artificial aggregates
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Colangelo, F.; Cioffi, R. Use of Cement Kiln Dust, Blast Furnace Slag and Marble Sludge in the Manufacture of Sustainable Artificial Aggregates by Means of Cold Bonding Pelletization. Materials 2013, 6, 3139-3159.

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