Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Flexural behavior of RC beams made from normal and high-strength recycled aggregate concrete
The use of recycled aggregates for the production of new concrete is a viable solution for reducing the environmental impact of construction materials. Nevertheless, understanding the peculiar mechanical behavior and failure mechanisms of Recycled Aggregate Concrete (RAC) and their influence on the structural performance of Reinforced Concrete (RC) members is essential for promoting the use of these more sustainable materials in structural applications. This paper reports the results of experimental tests aimed at investigating the influence of using Recycled Concrete Aggregates (RCAs) in concrete beams loaded in bending. Particularly, two RAC mixtures were designed, according to the well-known Compressible Packing Model (CPM), to achieve compressive strengths of 25 and 65 MPa. Reference mixtures, characterized by the same expected strength, were realized by employing ordinary crushed aggregates, whereas the corresponding RAC ones were obtained by replacing 50% (in volume) of the coarse fraction of ordinary aggregates with RCAs in the same size ranges. The mechanical behavior of these concrete mixtures was characterized by means of compressive and splitting tests, whereas the structural response was investigated by performing bending tests on RC beams. The results showed that, both for normal- and high-strength concrete under consideration, the use of RCAs affects neither the resulting mechanical properties of materials, nor the structural performance of the tested members.
Flexural behavior of RC beams made from normal and high-strength recycled aggregate concrete
The use of recycled aggregates for the production of new concrete is a viable solution for reducing the environmental impact of construction materials. Nevertheless, understanding the peculiar mechanical behavior and failure mechanisms of Recycled Aggregate Concrete (RAC) and their influence on the structural performance of Reinforced Concrete (RC) members is essential for promoting the use of these more sustainable materials in structural applications. This paper reports the results of experimental tests aimed at investigating the influence of using Recycled Concrete Aggregates (RCAs) in concrete beams loaded in bending. Particularly, two RAC mixtures were designed, according to the well-known Compressible Packing Model (CPM), to achieve compressive strengths of 25 and 65 MPa. Reference mixtures, characterized by the same expected strength, were realized by employing ordinary crushed aggregates, whereas the corresponding RAC ones were obtained by replacing 50% (in volume) of the coarse fraction of ordinary aggregates with RCAs in the same size ranges. The mechanical behavior of these concrete mixtures was characterized by means of compressive and splitting tests, whereas the structural response was investigated by performing bending tests on RC beams. The results showed that, both for normal- and high-strength concrete under consideration, the use of RCAs affects neither the resulting mechanical properties of materials, nor the structural performance of the tested members.
Flexural behavior of RC beams made from normal and high-strength recycled aggregate concrete
Rangel, Caroline Santana (Autor:in) / Amario, Mayara (Autor:in) / Martinelli, Enzo (Autor:in) / Pepe, Marco (Autor:in) / Toledo Filho, Romildo Dias (Autor:in)
29.09.2016
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
DDC:
690
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