## 1 Introduction  
The current linear model of economic development has contributed to resources scarcity and to the increase in wastes generation, as well for the emission of greenhouse gases [1]. This growth has followed a linear logic, \"take-make-dispose\", meaning that wastes are not recycled but simply deposited in landfills [2]. To change this, the concept of a circular production model has emerged, where the economic and environmental value of products are explored for as long as possible, and this strategy involves, among other actions, replacing primary materials with secondary materials [3]. The construction sector contributes to the economic development through wealth creation (GDP) and employment [4] but, at the same time, impacts and creates pressure on the environment due to intensive consumption of natural resources and energy as well as due to waste generation [5, 6]. This has negative effects on the environment, and it does not help promote sustainability and does not encourage the conservation of fundamental resources (water, energy, and raw materials) [7, 8, 9]. To counteract these negative impacts, industrial sectors should apply a circular economy concept which also involves the incorporation of wastes or byproducts coming from their own sector or from other industries but keeping the same technical performance as the products made from the traditionally used natural raw materials [10, 11, 12, 13, 14]. This action allows the minimization of landfill disposal and maintenance of the natural resource reserves [15]. Built infrastructures like roads use different pavement materials combined in mixtures containing aggregates (coarse or fine aggregates and fillers) and a binder (bitumen) [16, 17, 18]. Thus, pavements can receive different wastes to reduce extraction of natural resources. For example, [PERSON] et al. [19] used bottom ashes from municipal waste incinerators and electric arc furnace steel slags as fillers in bituminous mixtures and obtained good results (compaction, volumetric properties, and mechanical performance) compared with the standard material (calcareous filler) in the same formulation. [PERSON] et al. [20] used three wastes (used bentonite clay, dried mud waste from tungsten extraction, and a powder from grounded waste glass) as a filler in bituminous mixtures and found that they could assume that function. In addition to the construction industry, there are other sectors, such as the pulp and paper industry (PPI), consuming large amounts of raw materials (wood and various chemical products) and other resources (water, energy), generating a large volume of different wastes (e.g., lime mud and lime ash, lime slaker grits, green liquor dress, boiler ash, fly ash, and primary and secondary sludges) that are mostly landfilled [21; 22; 23; 24]. Dregs are generated in the clarification step of the green liquor in the PPI process and consist of sodium carbonate (Na\({}_{2}\)CO\({}_{3}\)), calcium carbonate (CaCO\({}_{3}\)), and sodium sulfide (Na\({}_{2}\)S). Grits are another waste generated in the causticizing step and consist of calcium carbonate (CaCO\({}_{3}\)), but may also present CaO, Ca(OH)\({}_{2}\), and Na\({}_{2}\)CO\({}_{3}\) as residual components [22; 25]. Both wastes show similarity with the fine limestone aggregates used in several construction materials. Some authors [22; 26] investigated the use of dregs and grits in hot bituminous mixes and both obtained good results at the laboratory scale. [PERSON] et al. [27] evaluated the effect of a partial incorporation of grits and dregs in mortars, validating their use as aggregates. After technical validation, the economic and environmental performance of the pavements should be evaluated through life cycle cost analysis (LCCA) and life cycle assessment (LCA) [12; 28]. LCA allows the quantification of the environmental impacts of processes and products during the life cycle, from the extraction of raw materials to their end of life, following ISO standards (ISO 14040 to ISO 14044 series) [29; 30; 31].