Punching shear strength of reinforced recycled concrete slabs

Francesconi, Luca; Pani, Luisa; Stochino, Flavio

doi:10.1016/j.conbuildmat.2016.09.094

Cited by 50 publications

(24 citation statements)

References 49 publications

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“…Several studies demonstrate the feasibility of using RAC also for structural purposes [5][6][7][8][9], but a limited number of researches investigate its long-term performance when exposed to extreme environmental conditions [10,11], which is an essential aspect for any construction material to be adopted in real-world applications. It is worth highlighting that the durability of concrete structures can be undermined by several degradation processes possibly occurring in concrete, which often propagate from the exposed surfaces throughout the cortical layers of concrete through its porous micro-structure [12].…”

Section: Introductionmentioning

confidence: 99%

Durability of Structural Recycled Aggregate Concrete Subjected to Freeze-Thaw Cycles

et al. 2020

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The increasing global demand for natural resources and the extensive production of construction and demolition waste (CDW) raise concerns for both the economic and environmental consequences that they can induce. Several efforts are being made with the aim to promote sustainable practices in the construction industry. In this context, one of the most relevant options refers to reusing CDW in new construction: specifically, the use of recycled concrete aggregate (RCA) is attracting a growing interest. Unfortunately, although the behavior of recycled aggregate concrete (RAC) has been widely investigated in the last few years, there are still knowledge gaps to fill on various aspects of the RAC performance, such as its durability in extreme conditions. The present study deals with the freeze-thaw performance of normal- (C35) and high-strength (C60) RAC produced with RCAs derived from different sources. Specifically, ten concrete mixtures were subjected to a different number of freeze-thaw cycles (namely, 0, 150 and 300), with the aim of analyzing the degradation of key physical and mechanical properties, such density, compressive strength, elastic modulus and tensile strength. Based on the obtained experimental results, a novel degradation law for freeze-thaw cycles is proposed: it unveils a relationship between open porosity of concrete, which is directly correlated to the peculiar properties of RCAs, and the corresponding damage level determined on RAC specimens.

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Section: Introductionmentioning

confidence: 99%

Durability of Structural Recycled Aggregate Concrete Subjected to Freeze-Thaw Cycles

et al. 2020

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“…The European Guidelines (European Parliament (2011)) encourage the use of recycled materials for the development of new products. Many researchers have focused their studies on the use of recycled aggregates obtained from the construction demolition waste in the production of new recycled concrete (Francesconi et al (2016), Mália et al (2013), Levy and Helene (2004), Hansen and Narud (1983), Li (2008;2009)). Indeed, the use of construction wastes reduces the exploitation of soil and subsoil and extend the service life of quarries and mines, delaying the opening of new mining sites and thus preserving non-recoverable natural resources.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, recycled aggregates used in the current experimental campaign were randomly taken from three authorized storage sites operating in southern Sardinia. More details can be found in Francesconi et al (2016).…”

Section: Introductionmentioning

confidence: 99%

Cracking of Reinforced Recycled Concrete Slabs

Stochino

Pani

Francesconi

2017

International Journal of Structural Glass and Advanced Material

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The results of an experimental investigation on cracking of fifteen reinforced recycled concrete slabs are presented in this paper. Five different recycled aggregates replacement percentages have been used for different mix design. First, the values of tensile strength, cylindrical compressive strength and modulus of elasticity of the concrete mixes have been determined. Then the deflection-load curve of the simply supported slabs have been obtained. The limit of the linear part of this curve determines the experimental cracking load. Its comparison with the theoretical value shows good agreement. Recycled concrete slabs show a similar performance to those made with ordinary concrete.

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“…2The concrete strength has only minor influence on the load-bearing capacity of flexural members, which are not subjected to axial forces. In literature, there are few studies on slabs incorporating RCA [31][32][33][34][35][36]. Among these studies, research on flexural behavior of slabs is scarce [35][36] and do not cover the tests of members constructed using RCA sourced from low strength concrete.…”

Section: Full-scale Tests On Rc Slabs and Columnsmentioning

confidence: 99%

Seismic Behavior of Reinforced Concrete Members Built with Recycled Aggregate

İlki¹,

Saribas²,

Göksu³

2019

acperpro

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In connection with rapid urbanization and earthquakes, a huge number of structures have been demolished and generated lots of waste concrete for the last 40 years. Studies on the reclamation of the waste concrete is a pioneer subject for construction sectors in the world. Since the recycling of the waste concrete and reusing of recycled concrete aggregate in the production of new concrete is an important issue for saving of natural resources, economic, sustainable development, significant number of studies have been carried out on this subject. In the scope of this study, a literature review is conducted on the effect of recycled concrete aggregate on mechanical and durability characteristics of small-scale members. Furthermore, structural and seismic performances of full-scale reinforced concrete structural members produced with recycled concrete aggregate are discussed. The test results indicated that the structural members containing recycled aggregate exhibited similar structural performance with their counterparts containing natural aggregates. It was also observed that recycled concrete aggregate did not seem to have an adverse effect on seismic characteristics of the structural members such as ductility.

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Punching shear strength of reinforced recycled concrete slabs

Cited by 50 publications

References 49 publications

Durability of Structural Recycled Aggregate Concrete Subjected to Freeze-Thaw Cycles

Durability of Structural Recycled Aggregate Concrete Subjected to Freeze-Thaw Cycles

Cracking of Reinforced Recycled Concrete Slabs

Seismic Behavior of Reinforced Concrete Members Built with Recycled Aggregate

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