Multi-Criteria Selection of Additives in Porous Asphalt Mixtures Using Mechanical, Hydraulic, Economic, and Environmental Indicators

Abstract

Porous asphalt (PA) mixtures are more environmentally friendly but have lower durability than dense-graded mixtures. Additives can be incorporated into PA mixtures to enhance their mechanical strength; however, they may compromise the hydraulic characteristics, increase the total cost of pavement, and negatively affect the environment. In this paper, PA mixtures were produced with 5 different types of additives including 4 fibers and 1 filler. Their performances were compared with the reference mixtures containing virgin bitumen and polymer-modified bitumen. The performance of all mixes was assessed using: mechanical, hydraulic, economic, and environmental indicators. Then, the Delphi method was applied to compute the relative weights for the parameters in multi-criteria decision-making methods. Evaluation based on distance from average solution (EDAS), technique for order of the preference by similarity to ideal solution (TOPSIS), and weighted aggregated sum product assessment (WASPAS) were employed to rank the additives. According to the results obtained, aramid pulp displayed comparable and, for some parameters such as abrasion resistance, even better performance than polymer-modified bitumen, whereas cellulose fiber demonstrated the best performance regarding sustainability, due to economic and environmental benefits.

Diseño de pavimentos permeables en España: situación actual y necesidades futuras

“…El primero se centra en el diseño de pavimentos urbanos con múltiples objetivos, incluido el que funcionen de forma resiliente a las inundaciones, manteniendo su resistencia frente a cargas de tráfico. Paralelamente, otro de los objetivos del proyecto ha permitido el desarrollo inicial de una herramienta de localización y selección de pavimentos permeables de asfalto poroso en el entramado urbano (Gupta et al, 2021a;Gupta et al, 2021b;Gupta, 2022). Por su parte, el proyecto HOFIDRAIN, en el que participaron el IIAMA-UPV, GITECO-UC y el Grupo de Ingeniería del Agua y del Medio Ambiente de la Universidade da Coruña (GEAMA-UDC), abarcó la caracterización hidráulica, ambiental y mecánica de secciones filtrantes en diferentes escenarios: considerando la colmatación del pavimento, la incorporación de materiales reactivos para potenciar la capacidad de tratamiento del sistema de pavimento permeable, o el empleo de diferentes aditivos para mejorar su vida útil y resiliencia.…”

Model of Choice Photovoltaic Panels Considering Customers’ Expectations

“…Then, the quality of technical criteria of photovoltaic panels related to customer expectations was estimated. For that, a combination of methods was used, i.e., zero-unitarization method (MUZ) [36][37][38][39][40] and a weighted sum model (WSM) [41][42][43][44]. The assessment of quality of criteria was done on the Likert scale [45,46], and then normalized by the MUZ method.…”

“…The WSM method is used to estimate product quality based on normalized criteria values, where quality is calculated considering the weighting of these criteria. The selected benefits for applying of the WPM method [41][42][43][44] were:  Effective for matching several of the criteria of the product, where these criteria are independent of each other;  Effective in estimating the product quality based on the normalized quality of criteria;  Allows estimation of product quality considering criteria weighting.…”

“…The normalized, weighted decision matrix A WSM i is created. For this purpose, the Formula ( 15) is used [41][42][43][44]:…”

“…The WSM method is used to estimate product quality based on normalized criteria values, where quality is calculated considering the weighting of these criteria. The selected benefits for applying of the WPM method [41][42][43][44] were:…”