Processing of Recycled Aggregates

Dhir, Ravindra K.; Brito, Jorge de; Silva, Rui V.; Lye, Chao Qun

doi:10.1016/b978-0-08-100985-7.00004-2

Cited by 5 publications

(3 citation statements)

References 75 publications

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“…Khatib (2016) discusses the sustainability of several construction materials, including aggregates, concrete and cement replacement materials, masonry, timber, bituminous materials, metals, glass, industrial by-products, and waste rubber. The use of sustainable construction materials such as recycled and secondary aggregates in building projects can lower construction work's environmental impact (Dhir et al. , 2019).…”

Section: Introductionmentioning

confidence: 99%

Barriers to the use of sustainable materials in Australian building projects

Gounder

Hasan

Shrestha

et al. 2021

ECAM

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PurposeAlthough the adverse effects of construction activities on the environment and the need for sustainable construction practices are recognised in both research and practice, any significant shift in the selection and use of construction materials from the sustainability perspective has not taken place in many building projects. Still, conventional construction materials are widely used in building projects in both developed and developing countries. This study attempts to identify the main barriers to the use of sustainable materials in building projects in an advanced economy such as Australia.Design/methodology/approachThis study adopted a questionnaire survey approach to examine the main reasons behind the low usage of sustainable materials in building projects. Based on the relative importance index, exploratory factor analysis and multinomial logistic regression analysis, the study examined the main barrier measures and barrier factors to the use of sustainable materials in building projects.FindingsThe findings reveal that critical barriers to the use of sustainable materials are related to cost and profit considerations, the unwillingness of the key stakeholders to incorporate these materials into building projects, lack of incentives and government policies. The factor analysis reduced the critical barrier measures into three factors: techno-economic considerations, cost and delay concerns and resistance to use. Furthermore, multinomial regression analysis based on the extracted factors identified techno-economic considerations as the main barrier factor to the use of sustainable materials in building projects.Practical implicationsThe empirical results of this research can inform construction practitioners, organisations and policymakers on how to increase the use of sustainable building materials in the construction industry.Originality/valueIdentification of barriers to the use of sustainable building materials is a prerequisite to improve their uptake and use in the construction industry. The study fills a gap in the existing research on the use of sustainable materials in building projects in Australia.

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Section: Introductionmentioning

confidence: 99%

Barriers to the use of sustainable materials in Australian building projects

Gounder

Hasan

Shrestha

et al. 2021

ECAM

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“…Cone crushers operate based on the principle of the gyratory motion driven by an eccentric wheel. These machines are unsuitable for processing material with large particle sizes, making jaw or impact crushers more suitable as primary crushers [73].…”

Section: Cone Crushermentioning

confidence: 99%

“…The screw grinding method uses a shaft screw with an intermediate section, followed by an exhaust section featuring a warping cone [73].…”

Section: Screw Crushermentioning

confidence: 99%

Influence of Recycling Processes on Properties of Fine Recycled Concrete Aggregates (FRCA): An Overview

Sbardelotto,

dos Santos,

Martins

et al. 2024

Waste

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Concrete waste recycling processes involve multiple stages, equipment, and procedures which produce Fine Recycled Concrete Aggregates (FRCA) for use in construction. This research aims at performing a comprehensive overview of the recycling technologies, recycling processes, and normative requirements to produce high-quality FRCA and to investigate the influence of these processes on their physical properties. The properties investigated were the particle size distribution (PSD), water absorption, oven-dry density, and adhered paste. The correlations between these properties were also investigated. The results indicate that the recycling processes with the highest potential for producing high-quality aggregates demand jaw crusher and impact crusher combinations. These processes are better suited for achieving FRCA with the desired particle size distribution and oven-dry density. However, water absorption and adhered paste, which are critical factors for obtaining high-quality FRCA, seem to be more dependent on the original material than on the recycling process.

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