Quality Assurance of Recycled Aggregates

Alaejos, P.; Juan, Marta Sánchez de; Rueda, Jorge; Drummond, R. Wayne; Valero, Ignacio

doi:10.1007/978-94-007-4908-5_6

Cited by 6 publications

(3 citation statements)

References 4 publications

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“…In recent years, making use of recycled aggregate to prepare self-compacting concrete has been appreciated as a good strategy to minimize construction and demolition wastes and protect the environment [ 15 , 22 , 23 , 24 , 25 , 26 , 27 ]. The mechanical behavior of self-compacting concrete containing recycled aggregates is close to that of traditional concrete [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Compressive Behaviors of Thin-Walled Steel Tube Stub Columns Filled with Self-Compacting Concrete Containing Recycled Aggregate

Wang,

Sun,

Zhang

et al. 2023

Materials

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Natural resources have been excessively consumed, and large amounts of construction wastes have been generated, owing to the fast development of civil industry, causing crucial environmental issues. Therefore, reusable construction waste fabricated into recycled concrete offers a good strategy to solve this issue. Thus, this article first develops thin-walled steel tubes stub columns filled with self-compacting concrete containing recycled coarse aggregate. Afterwards, the compressive behaviors of the columns when undergoing axial compression loading to failure are explored. Subsequently, the effect of types of self-compacting concrete and wall thickness on failure modes and the relationships between load and displacement/strain is discussed comprehensively. Moreover, models of load–displacement/strain behaviors are proposed. The results show that columns with identical wall thicknesses containing both natural and recycled coarse aggregate display similar failure modes, mainly presenting as local buckling and rupture. The shape of the load–displacement/strain curves for identical wall thicknesses are almost the same. Nevertheless, the maximum load and stiffness of columns containing recycled coarse aggregate are lower than those of columns containing natural coarse aggregate. Additionally, the maximum loads corresponding to wall thickness of 1.2 mm and 3.0 mm are decreased by 18.4% and 5.8%, respectively. Moreover, the proposed models can reasonably evaluate the relationships between load and displacement/strain. This paper demonstrates that thin-walled steel tubular columns containing recycled coarse aggregate present positive compressive behaviors and thus exhibit great potential for developing environmentally friendly and sustainable civil infrastructures.

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Section: Introductionmentioning

confidence: 99%

Compressive Behaviors of Thin-Walled Steel Tube Stub Columns Filled with Self-Compacting Concrete Containing Recycled Aggregate

Wang,

Sun,

Zhang

et al. 2023

Materials

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“…Given the high energy consumption of the concrete industry due to the high demand for natural resources and the environmental risks involved, RA have been used as partial or full substitutes to minimise the environmental impact, taking an important step towards establishing a sustainable society and boosting the circular economy [12], [17] , [18]. RA is a type of composite material whose quality depends directly on the origin of the waste, the place and reason for demolition and the original characteristics of the concrete [19]. Therefore, it should not be lost sight of the fact that any change in the aggregate, however small it may seem, will have a significant effect not only on the properties of the concrete but also on the cost of production, transport and marketing.…”

Section: Introductionmentioning

confidence: 99%

Influence of design parameters on the fresh and durable properties of self-compacting concrete with recycled aggregate

Martínez‐García

Jagades²,

Fraile‐Fernández

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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The objective of this paper is to analyse the influence of design parameters on the fresh and mechanical properties in the manufacture of self-compacting concrete with recycled fine and coarse aggregates. Design parameters such as water-cement ratio, water/paste ratio, total aggregate to cement ratio, fine aggregate to coarse aggregate ratio, water to solid ratio in percentage, superplasticiser content, RCA replacement percentage and RFA replacement percentage are analysed. The design parameters are found to affect the evolution of the fresh and mechanical properties of SCC with recycled aggregates.

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“…Therefore, we should not lose sight of the fact that any change in the aggregate, no matter how small it may seem, will have a significant effect not only on the properties of the concrete but also on the cost of production, transportation, and commercialization. In this sense, several researchers have focused their studies on the use of recycled aggregates both coarse, in most cases, and fine [53,59,[73][74][75]. The coarse recycled aggregate consists of two different materials: natural coarse aggregate and cement mortar bonded to the coarse aggregate (between 20-70%) [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of Design Parameters on Compressive and Split Tensile Strength of Self-Compacting Concrete with Recycled Aggregate: An Overview

Jagadesh¹,

Juan-Valdés

Guerra‐Romero

et al. 2021

Applied Sciences

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One of the prime objectives of this review is to understand the role of design parameters on the mechanical properties (Compressive and split tensile strength) of Self-Compacting Concrete (SCC) with recycled aggregates (Recycled Coarse Aggregates (RCA) and Recycled Fine Aggregates (RFA)). The design parameters considered for review are Water to Cement (W/C) ratio, Water to Binder (W/B) ratio, Total Aggregates to Cement (TA/C) ratio, Fine Aggregate to Coarse Aggregate (FA/CA) ratio, Water to Solid (W/S) ratio in percentage, superplasticizer (SP) content (kg/cu.m), replacement percentage of RCA, and replacement percentage of RFA. It is observed that with respect to different grades of SCC, designed parameters affect the mechanical properties of SCC with recycled aggregates.

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Quality Assurance of Recycled Aggregates

Cited by 6 publications

References 4 publications

Compressive Behaviors of Thin-Walled Steel Tube Stub Columns Filled with Self-Compacting Concrete Containing Recycled Aggregate

Compressive Behaviors of Thin-Walled Steel Tube Stub Columns Filled with Self-Compacting Concrete Containing Recycled Aggregate

Influence of design parameters on the fresh and durable properties of self-compacting concrete with recycled aggregate

Effect of Design Parameters on Compressive and Split Tensile Strength of Self-Compacting Concrete with Recycled Aggregate: An Overview

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