Chemical, mineralogical, microstructural and engineering properties of tropical soils stabilised with the combined and individual use of different types of steel slag
IF 3.4 3区 工程技术Q2 CONSTRUCTION & BUILDING TECHNOLOGY
Emerson Cordeiro Lopes, Taciano Oliveira da Silva, Heraldo Nunes Pitanga, Leonardo Gonçalves Pedroti, José Maria Franco de Carvalho, Gustavo Henrique Nalon, Eduardo Nery Duarte de Araújo, Klaus Henrique de Paula Rodrigues
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引用次数: 0
Abstract
AbstractThe combined use of electric arc furnace slag fines (EAFSF) and ladle furnace slag fines (LFSF) for soil stabilisation was not evaluated in previous works. Previous studies reported limited information on the microscale behaviour of steel slag materials used in soil stabilisation. This work evaluated synergistic effects provided by the combination of EAFSF and LFSF on the stabilisation of clayey and sandy soils. It provided a detailed microscale analysis of raw materials and slag-soil mixes with scanning electron microscopy, X-ray diffraction, X-ray fluorescence, Raman spectroscopy, thermogravimetric analysis, and derivative thermogravimetry. Their compaction behaviour, unconfined compressive strength (UCS), CBR index, swelling, and resilient modulus were also determined. Filler effects, cementitious, pozzolanic, and ion-exchange reactions were discussed. A positive synergistic behaviour was observed when combining 10% LFSF and 5% EAFSF (by soil weight), which provided a structural arrangement that provided increases in UCS and CBR up to 651% and 1500%, respectivelyKEYWORDS: Road constructionsoil stabilisationtropical soilselectric arc furnace slagladle furnace slagmicrostructural investigation Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001. The authors also acknowledge the support provided by the Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG), the Physics Department and the Civil Engineering Department of the Universidade Federal de Vicosa.
期刊介绍:
The international journal Road Materials and Pavement Design welcomes contributions on mechanical, thermal, chemical and/or physical properties and characteristics of bitumens, additives, bituminous mixes, asphalt concrete, cement concrete, unbound granular materials, soils, geo-composites, new and innovative materials, as well as mix design, soil stabilization, and environmental aspects of handling and re-use of road materials.
The Journal also intends to offer a platform for the publication of research of immediate interest regarding design and modeling of pavement behavior and performance, structural evaluation, stress, strain and thermal characterization and/or calculation, vehicle/road interaction, climatic effects and numerical and analytical modeling. The different layers of the road, including the soil, are considered. Emerging topics, such as new sensing methods, machine learning, smart materials and smart city pavement infrastructure are also encouraged.
Contributions in the areas of airfield pavements and rail track infrastructures as well as new emerging modes of surface transportation are also welcome.