Physical Properties of Mineral and Recycled Aggregates Used to Mineral-Asphalt Mixtures

Abstract

This article presents test results and examines the possibilities of using aggregate from ceramic waste for mineral-asphalt mixtures. In addition, the mineral composition, physical and mechanical properties of aggregates from natural raw materials such as dolomite, granodiorite and waste ceramic aggregate (introduced as a partial substitute for the main aggregate) were analyzed. The shape of grains was examined by determining the shape and flatness index of aggregates, resistance to grinding and frost resistance. The tested properties have a direct impact on the durability of road surfaces. To this end, the adhesion of asphalt to the surface of the aggregates used was additionally determined. Determination of surface roughness and two-dimensional (2D) topography of tested aggregates was carried out. The aggregates microstructure examination, coupled with the energy-dispersive X-ray spectroscopy (EDS) analysis, was conducted to determine the morphology and texture of the aggregates as well as to identify the basic chemical components.

Sustainable Recycling of High-Strength Concrete as an Alternative to Natural Aggregates in Building Structures

“…At present, recycled aggregate is most often utilized in road construction as a road base, sidewalk base, as well as pavement for squares and parking lots [8][9][10][11]. This is connected with certain limitations of the aggregate obtained from concrete.…”

Wettability of Asphalt Concrete with Natural and Recycled Aggregates from Sanitary Ceramics

“…Analysis of the chemical compositions of aggregates provides data on the external surface structures and their chemical affinity towards asphalt. Due to the acidic pH of the asphalt binder resulting from the large number of carboxyl groups, which are components of macromolecular hydrocarbon chains, a greater chemical affinity is exhibited towards alkaline aggregates (dolomite has high contents of calcium, magnesium, iron, and aluminum) [ 18 , 48 , 57 ]. Therefore, the application of the dolomite aggregate is more favorable in this case, because more durable compounds can be obtained at the phase interface (interface between liquid asphalt and solid carbonate aggregate) [ 58 ].…”

“…The growing amount of waste, combined with the lack of the possibility to quickly replenish the sources of natural raw materials (including aggregates), necessitates the search for the methods that can be used for their recovery and reuse. Nevertheless, appropriate modification of the properties characterizing construction composites enables the efficient application of recycled materials [ 17 , 18 ].…”

“…In civil engineering, ceramics are commonly employed in concretes and mortars [ 44 , 45 , 46 , 47 ]; however, there is a lack of publications that precisely describe the parameters and conditions needed to apply these aggregates in the mixtures used in the road construction industry. A significant problem may be to determine the optimal amount of added recycled aggregate so that it does not significantly deteriorate the properties of the mixture [ 18 , 48 ].…”

Evaluation of the Physical, Chemical and Environmental Properties of Ladle Furnace Slag for Their Utilization as Filler in Bituminous Mixtures

“…Based on this, several investigations have been carried out in the field of roads in which waste is used to minimize the extraction of raw materials [12]. The waste used has been diverse: ceramic dust [13], discarded plastics [14], ashes from biomasses [15], disused tyres [16], demolition aggregates [17], etc. However, in order to correctly reduce the environmental impact, it is necessary to use waste that creates a material of similar or superior quality than conventional waste.…”