AN OVERVIEW OF SUSTAINABLE CONCRETES WITH MAXIMIZED AGGREGATE CONTENT: NATURAL LIMESTONE VERSUS STEEL-MAKING SLAGS
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2022
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University of Cantabria - Building Technology R&D Group
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Abstract
The conversion of various industrial by-products from Spanish factories into co-products used in partial substitution of cement and concrete aggregate has been extensively studied since the 1990s. Building on that research effort, the present investigation is focused on improving the packing density of concrete aggregates, with special emphasis on two central objectives: Firstly, the reduction of cement and natural aggregate content within concrete; secondly, the validation of their substitution by Electric Arc Furnace Slag (black-slag) aggregate. To do so, several experimental campaigns were conducted, in which 4 compaction procedures were applied under dry conditions to: 4 sieved fractions of natural limestone and 3 sieved fractions of black-slag aggregates. The physical properties of the 7 sieved fractions had previously been characterized and compared with theoretical models, in order to validate their dosing in the experimental tests: Fuller curve, Funk and Dinger curve, Compressible Packing Model, and the 3-Parameter Packing model. The aggregate-packing densities were experimentally and theoretically studied with dry methods. Our findings showed that, unlike natural aggregates, other methods based on aggregate shape are preferable for black-slag mixtures, due to the specific textures and their abrupt particle contours. The conclusions from the investigations were that both the Compressible Packing Model and the 3- Parameter Packing models produced valuable packing-density predictions for the binary mixes.
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Publisher Copyright: © 2022, University of Cantabria - Building Technology R&D Group. All rights reserved.
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3-Parameter Packing Density Model (3-PM) , Compressible Packing Model (CPM) , Concrete design , Electric Arc Furnace Slag (ES) , Natural (limestone) Aggregate (NA) , Mechanics of Materials , Building and Construction , Geography, Planning and Development , Cultural Studies , Urban Studies , SDG 9 - Industry, Innovation, and Infrastructure
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García-Cortés , V , Garcia , D , Revilla-Cuesta , V , Romera , J M & San-José , J T 2022 , AN OVERVIEW OF SUSTAINABLE CONCRETES WITH MAXIMIZED AGGREGATE CONTENT : NATURAL LIMESTONE VERSUS STEEL-MAKING SLAGS . in H Blanco , Y Boffill & I Lombillo (eds) , REHABEND 2022 - Construction Pathology, Rehabilitation Technology and Heritage Management . REHABEND , University of Cantabria - Building Technology R&D Group , pp. 1634-1642 , 9th Euro-American Congress on Construction Pathology, Rehabilitation Technology and Heritage Management, REHABEND 2022 , Granada , Spain , 13/09/22 .
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