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Coatings 2017, 7(6), 76; doi:10.3390/coatings7060076

Alternative Fillers for the Production of Bituminous Mixtures: A Screening Investigation on Waste Powders

DICAM, University of Bologna, 40136, Italy
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Academic Editor: Alessandro Lavacchi
Received: 27 February 2017 / Revised: 11 May 2017 / Accepted: 27 May 2017 / Published: 3 June 2017
(This article belongs to the Special Issue Low Environmental Impact Coatings for Road Pavements)
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Abstract

There has been a significant increase in the demand for using recycled materials in construction because of the lack and limitation of available natural resources. A number of industrial and domestic waste products are being used in the replacement of traditional materials for road construction, and many studies have been carried out in recent years on the use of different recycled materials in substitution of conventional fillers in Asphalt Concretes (AC). The aim of this laboratory research is to analyze the physical characteristics of three different recycled fillers and compare them with those of a traditional limestone filler. The alternative fillers presented in this paper are: a waste bleaching clay that comes from two consecutive stages in the industrial process for decolouring vegetable oils and producing biogas (Ud filler), a dried mud waste from a tungsten mine (MW filler) and a recycled glass powder (Gl filler). Results show significant differences between the fillers, and, in particular, Rigden Voids (RV) seem to have the largest potential influence on the rheology of ACs. View Full-Text
Keywords: asphalt concretes; alternative fillers; waste bleaching clays; mud waste; recycled glass powder; Rigden voids asphalt concretes; alternative fillers; waste bleaching clays; mud waste; recycled glass powder; Rigden voids
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Sangiorgi, C.; Tataranni, P.; Mazzotta, F.; Simone, A.; Vignali, V.; Lantieri, C. Alternative Fillers for the Production of Bituminous Mixtures: A Screening Investigation on Waste Powders. Coatings 2017, 7, 76.

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