Slebi-Acevedo Carlos J, Lastra-González Pedro, Calzada-Pérez Miguel A, Castro-Fresno Daniel
GITECO Research Group, Universidad de Cantabria, 39005 Santander, Spain.
GCS Research Group, Universidad de Cantabria, 39005 Santander, Spain.
Materials (Basel). 2020 Feb 3;13(3):675. doi: 10.3390/ma13030675.
Porous asphalt is a type of mixture characterized by having high air void percentages that offers multiple benefits when used in wearing courses in terms of driving safety, water flow management, and noise reduction. However, the durability of porous asphalt (PA) mixtures is significantly shorter when compared to dense-graded asphalt mixtures. This study investigated the impact of polyolefin-aramid fibers and hydrated lime in the functional and mechanical performance of porous asphalt mixtures. A parametric study based on the concept of design of experiments was carried out through the Taguchi methodology. Accordingly, an experimental design was conducted based on the L18 full factorial orthogonal array. Three control factors-fiber content, binder content, and filler type-were included at various levels, and multiple responses including total air voids, interconnected air voids, particle loss in dry conditions, particle loss in wet conditions, and binder drainage were assessed experimentally. Signal-to-noise ratios were calculated to determine the optimal solution levels for each control factor for the multiple responses. In the second phase of the research, multi-criteria decision-making techniques-namely, criteria importance through inter-criteria correlation and weighted aggregated sum product assessment-were used to transform the multiple-response optimization problem into a single-unique optimization problem and to elaborate a preference ranking among all the mixture designs. The most significant levels for acquiring the optimum overall response value were found to be 0.05% for fiber content and 5.00% for binder content and mixed filler with hydrated lime.
多孔沥青是一种具有高空隙率的混合料，在磨耗层中使用时，在行车安全、水流管理和降噪方面具有多种优势。然而，与密级配沥青混合料相比，多孔沥青（PA）混合料的耐久性明显较短。本研究调查了聚烯烃芳纶纤维和熟石灰对多孔沥青混合料功能和力学性能的影响。通过田口方法，基于实验设计的概念进行了参数研究。据此，基于L18全因子正交阵列进行了实验设计。包括纤维含量、结合料含量和填料类型三个控制因素，设置了不同水平，并通过实验评估了包括总空隙率、连通空隙率、干燥条件下的颗粒损失、潮湿条件下的颗粒损失和结合料排水等多个响应指标。计算信噪比以确定每个控制因素针对多个响应指标的最佳解决方案水平。在研究的第二阶段，使用多准则决策技术——即通过准则间相关性确定准则重要性和加权聚合和积评估——将多响应优化问题转化为单一唯一的优化问题，并在所有混合料设计中制定偏好排序。发现获得最佳总体响应值的最显著水平为纤维含量0.05%、结合料含量5.00%以及使用熟石灰的混合填料。
