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The pursuit of sustainable construction practices has led to a growing interest in the utilization of recycled materials in concrete production. To enhance the utilization of recycled aggregate concrete, its performance in terms of mechanical characteristics need to be optimized. This study investigates the effect of fly ash and …
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Recycled aggregate brick (RAB) constitutes a significant waste stream in developed countries, originating from brick manufacturing and demolition processes.
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The physical properties such as grading, size and texture, density, specific gravity, water absorption, flakiness and elongation indices of recycled aggregates are …
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This paper discusses the suitability of producing concrete with 100 % recycled aggregate to meet durability and strength requirements for different applications. Aggregate strength, gradation, absorption, specific gravity, shape and texture are some of the physical and mechanical characteristics that contribute to the strength and durability …
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Fracture parameters of fiber concrete (FC) are currently a hot research area. Fracture mechanics is the field of solid mechanics that helps to study the type and propagation of cracks in materials. It uses methods of calculating the driving force on a crack and characterizes the material's resistance to fracture. Behavioral characteristics …
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Regarding the number of recycling cycles and aggregate characteristics, three cycles were not enough to achieve the stabilisation of aggregate properties (apart from Los Angeles Abrasion) . 2.2. Multi-Recycled Concrete Aggregates for Concrete Production ... Concrete aggregate multi-recycling is feasible, and it will contribute to a …
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The characteristics of recycled concrete aggregate, and the mechanical performance of RAC containing recycled concrete aggregate, such as compressive …
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At present, compared with other recycled coarse aggregate types, recycled concrete aggregate is the most extensive implemented RA in construction, and organizations in many countries have developed specifications [10], [11], [12]. In this paper, the performance and application of recycled concrete aggregate were focused on.
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Helps readers gain a better understanding of the behaviour of recycled aggregate concrete (RAC) under hardened state. Explains the behaviour of RAC under impact load with colour pictures to enhance the readability. Includes quality-improvement techniques for recycled aggregates to enable researchers to further enhance the quality of RAC.
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The paper also examines the possible approaches in improving the PVC plastic aggregate characteristics, which can enhance the usage of PVC plastic aggregate for sustainable construction material. Recycling plastic waste in construction applications is a common concept for innovative concrete development.
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The number of waste rubber tires (WRT) accumulating every year is soaring at an alarming rate. It is estimated that by 2030, this number will reach about 1.2 billion (Mondal and Biligiri 2018).WRT being generated in large proportions, poses major environmental, economic, and social threats (Azizian et al. 2003; Dong et al. 2013; Singh …
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After that, recycled aggregate concrete (RAC) was produced with an objectively compressive strength of 30MPa, in which the recycled coarse aggregate was used as 30%, 70% and 90% replacements of ...
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The synergetic recycling of MSA and RCA as construction materials to produce the mussel shell-recycled aggregate concrete (MS-RAC) may be a wise option. ... Leem, Effect of oyster shell substituted for fine aggregate on concrete characteristics: Part I. Fundamental properties. Cem. Concr. Res., 35 (11) (2005), pp. 2175-2182.
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First, the aggregate fragmentation caused by compaction effort was simulated using the superpave gyratory compactor. In this regard, the influences of aggregate type and RA content were investigated. Second, the indoor experiment scheme was determined using the Taguchi method to obtain compaction data of recycled …
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Aggregate strength, gradation, absorption, moisture content, specific gravity, shape, and texture are some of the physical and mechanical characteristics …
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It is critical to improve the strength parameters of recycled coarse aggregate concrete to be equal to aggregate concrete. Thus, the research focusses on using different percentages of replacements of ordinary Portland cement with a supplementary cementitious materials (SCMs) to determine the best combination for structural purposes …
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The COTE value of concrete made with natural coarse aggregate was 9.91×10-6m/m/°C, that of job-site produced recycled coarse aggregate was 10.45×10-6m/m/°C, and that of recycled aggregate ...
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19.2.1 Recycled concrete aggregate (RCA) Coarse RCA complies to the requirements of maximum 5% masonry content, 5% fine materials, 0.5% lightweight material, 5% asphalt, 1% foreign material and 1% acid soluble sulfate, and is suitable for use in concrete as per BS 8500-2 (2006). In designated concrete RC20/25 to RC40/50, RCA can automatically ...
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This article presents a comprehensive review on the use of recycled concrete aggregate (RCA) and recycled aggregate concrete (RAC) in construction, with …
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The main characteristics of recycled fine aggregate and recycled coarse aggregate are reported in this study, along with a distinction between these characteristics and trademark sums.
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Hanumesh et al., 2018 [51] utilized PPFs in RAC and noticed increases in shear strength and mechanical characteristics with 25% recycled aggregate [52]. ... Similarly, coarse recycling aggregate will help save the natural reserves of limestone and other mineral resources used as aggregates and help preserve the environment. 5.
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Recycled aggregates. Said Kenai, in Waste and Supplementary Cementitious Materials in Concrete, 2018. Abstract. Construction industry generates huge amounts of debris that …
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The recycling process and net concrete and aggregate content in concrete structures after demolition are illustrated in Tables 5 and 6, based on results from Japanese concrete (Noguchi, Park, and Kitagaki Citation 2015). Table 5 lists the component ratios of the mixed concrete waste under different demolition scenarios. The data indicated ...
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Recycling steel slag as aggregate can reduce the consumption of natural aggregate, and it relieves the environmental hazards caused by the accumulation of steel slag [8], [9]. ... The characteristic peak at 3450 cm −1 relates to the of free –OH that determines the solid properties of silicone resin.
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Abstract. Recycled aggregate (RA) is a product of construction and demolition wastes, and RA particle presents low strength and adhesion with asphalt mortar compared with natural aggregate. With the aim of studying fracture characteristics of recycled aggregate asphalt concrete (RAAC), the influence of RA on interfacial zone …
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20% fine aggregate for waste glass obtains satisfactory results. ... glass in cement-based materials and the different effects that have been found to investigate the viability of this recycling method. 2. Characteristics of glass and methods of processing crushed glass2.1. Physical and chemical characteristics of glass.
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Using recycled aggregates from construction and demolition waste can preserve natural aggregate resources, reduce demand of landfill, and contribute to sustainable built environment. This study provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, …
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The review study yielded the following findings in regards to concrete material properties: (1) replacing NA in concrete with RCA decreases the compressive …
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2. Impermeability. Impermeability is a characteristic of the durability of concrete and is closely related to other durability characteristics. For example, water-soluble chloride ions, CO 2, and sulfate can enter concrete, or other external factors can cause damage to the concrete, making the service life of concrete greatly affected and …
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The aim of this study is to provide basic experimental data to help prevent environmental pollution and to pursue resource recycling by examining the use of waste oyster shells (OS) as concrete aggregate. The possibilities of manufacturing the waste into lightweight concrete and hollow concrete blocks are also examined. The …
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