Terrones-Saeta Juan María, Iglesias-Godino Francisco Javier, Corpas-Iglesias Francisco Antonio, Martínez-García Carmen
Department of Chemical, Environmental, and Materials Engineering, Higher Polytechnic School of Linares, University of Jaen, Scientific and Technological Campus of Linares, 23700 Linares, Jaen, Spain.
Materials (Basel). 2020 Oct 26;13(21):4765. doi: 10.3390/ma13214765.
Cold in-place recycling with bitumen emulsion is a good environmental option for road conservation. The technique produces lower CO emissions because the product is manufactured and spread in the same location as the previous infrastructure, and its mixing with bitumen emulsion occurs at room temperature. Adding materials with cementitious characteristics gives the final mixture greater resistance and durability, and incorporating an industrial by-product such as ladle furnace slag (of which cementitious characteristics have been corroborated by various authors) enables the creation of sustainable, resistant pavement. This paper describes the incorporation of ladle furnace slag in reclaimed asphalt pavements (RAP) to execute in-place asphalt pavement recycling with bitumen emulsion. Various test groups of samples with increasing percentages of emulsion were created to study both the density of the mixtures obtained, and their dry and post-immersion compressive strength. To determine these characteristics, the physical and chemical properties of the ladle furnace slag and the reclaimed asphalt pavements were analyzed, as well as compatibility with the bitumen emulsion. The aforementioned tests define an optimal combination of RAP (90%), ladle furnace slag (10%), water (2.6%), and emulsion (3.3%), which demonstrated maximum values for compressive strength of the dry and post-immersion bituminous mixture. These tests therefore demonstrate the suitability of ladle furnace slag for cold in-place recycling with bitumen emulsion.
使用沥青乳液进行现场冷再生是道路养护的一个良好环保选择。该技术产生的二氧化碳排放量较低，因为产品是在与先前基础设施相同的地点制造和摊铺的，并且其与沥青乳液的混合在室温下进行。添加具有胶凝特性的材料可使最终混合物具有更高的强度和耐久性，而掺入工业副产品如钢包精炼炉渣（其胶凝特性已得到多位作者的证实）能够创建可持续、耐用的路面。本文描述了在再生沥青路面（RAP）中掺入钢包精炼炉渣以使用沥青乳液进行现场沥青路面再生的情况。创建了乳液百分比不断增加的各种试验组样品，以研究所得混合物的密度及其干燥和浸水后的抗压强度。为了确定这些特性，分析了钢包精炼炉渣和再生沥青路面的物理和化学性质，以及与沥青乳液的兼容性。上述试验确定了RAP（90%）、钢包精炼炉渣（10%）、水（2.6%）和乳液（3.3%）的最佳组合，该组合显示出干燥和浸水后沥青混合物的抗压强度最大值。因此，这些试验证明了钢包精炼炉渣适用于使用沥青乳液进行现场冷再生。
