Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Autogenous Shrinkage in Structural Concrete Made with Recycled Concrete Aggregates
Sustainable alternatives should be employed in the construction industry to minimize environmental impacts, including high consumption of natural resources and high waste generation. The recycling of waste to be used as aggregates for concrete is an alternative with great potential. Although many studies have been carried out to investigate the influence of the use of Recycled Concrete Aggregates (RCAs) on the mechanical properties of concrete, the relationship between the intrinsic properties of aggregates and the main types of long-term deformation of Recycled Aggregate Concrete (RAC) still needs to be better understood. As a matter of the principle, autogenous shrinkage can cause significant damage to concrete structures, mainly due to the induction of cracking that can impair the durability of the structure. In this context, the present paper presents the preliminary results of an experimental investigation aimed at evaluating the influence of RCAs on the autogenous shrinkage of normal and high strength RACs (35 and 60 MPa). The RCA were derived from demolition concrete waste and used in a 9.5–19 mm particle size fraction. In addition, the concepts of scientific mix-design for the optimization of dry granular mixture were utilized through the Compressible Packing Model (CPM).
Autogenous Shrinkage in Structural Concrete Made with Recycled Concrete Aggregates
Sustainable alternatives should be employed in the construction industry to minimize environmental impacts, including high consumption of natural resources and high waste generation. The recycling of waste to be used as aggregates for concrete is an alternative with great potential. Although many studies have been carried out to investigate the influence of the use of Recycled Concrete Aggregates (RCAs) on the mechanical properties of concrete, the relationship between the intrinsic properties of aggregates and the main types of long-term deformation of Recycled Aggregate Concrete (RAC) still needs to be better understood. As a matter of the principle, autogenous shrinkage can cause significant damage to concrete structures, mainly due to the induction of cracking that can impair the durability of the structure. In this context, the present paper presents the preliminary results of an experimental investigation aimed at evaluating the influence of RCAs on the autogenous shrinkage of normal and high strength RACs (35 and 60 MPa). The RCA were derived from demolition concrete waste and used in a 9.5–19 mm particle size fraction. In addition, the concepts of scientific mix-design for the optimization of dry granular mixture were utilized through the Compressible Packing Model (CPM).
Autogenous Shrinkage in Structural Concrete Made with Recycled Concrete Aggregates
RILEM Bookseries
M.C.F. Cunha, Vítor (Herausgeber:in) / Rezazadeh, Mohammadali (Herausgeber:in) / Gowda, Chandan (Herausgeber:in) / Amario, Mayara (Autor:in) / Rangel, Caroline S. (Autor:in) / Pepe, Marco (Autor:in) / Martinelli, Enzo (Autor:in) / Filho, Romildo D. Toledo (Autor:in)
RILEM Spring Convention and Conference ; 2020 ; Guimarães, Portugal
Proceedings of the 3rd RILEM Spring Convention and Conference (RSCC 2020) ; Kapitel: 11 ; 111-120
RILEM Bookseries ; 35
14.07.2021
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Low-autogenous shrinkage and high-performance recycled concrete
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