In India so far, no study is reported which gives the systematic geotechnical characterization of waste material from C&D waste processing plants. Thus, through this paper it is an attempt to understand the feasibility of using mixed waste coming out of processing plants in Delhi in the form of Recycled Aggregate Bricks in various …

The works of several organizations and professional bodies in the area of C&D waste recycling led to the change in the codal provisions that earlier prevented the usage of recycled aggregates for the production of concrete used in construction.

This comprehensive review explores the performance of composite metal decks and structural elements incorporating recycled aggregate concrete (RAC) at elevated temperatures. Despite the acknowledged environmental benefits of using recycled aggregates in concrete production, there is a notable gap in the literature regarding …

Recycled aggregates from old concrete or other C&D wastes for nonstructural applications are introduced in details for different types of application (e.g., sidewalk). For example, downcycling C&D wastes into crushed concrete for direct application in backfill is considered a more widely adopted application.

Reusing aggregate from building and demolition waste can help protect the ordinary natural aggregate supply, reduce landfill demand, and drive toward a more sustainable environment. This paper examines the recycled history of recycled aggregate and recycled aggregate. A general review of how recycled aggregates were used by …

The incorporation of coarse recycled aggregates in concrete showed a slump value around 75 ± 20 mm. The fresh concrete properties of density with recycled aggregate concrete slightly decreased at a percentage of 2.33%. This behavior was the same for the concrete in fresh and hardened stages.

The main aim of this paper is to improve the quality of recycled coarse concrete aggregates by using the carbonation technique. The aggregates are tested for physical properties and microstructural analysis. The concrete produced using these treated aggregates is tested for Non-destructive, Mechanical and Durability properties …

The use of most recycled aggregate in concrete structures is still limited to low strength and non-structural applications due to important drop in strength and durability performances generated.

Among the different types of recycled aggregates, prior studies [8,9] have demonstrated the viability of precast concrete in the manufacture of structural elements, providing a sustainable ...

But the recycled demolished construction waste aggregates utilized in modern building application, gives a promising arrangement to both issues. This research work includes experimental study, performed to explore the properties of reused concrete aggregate collated with that of natural concrete aggregate.

This is an important test for recycled aggregates enabling the producer to categorise the aggregate's constituents according to defined descriptions and categories: e.g. A recycled aggregate having 55% concrete, 25% brick, 19% asphalt and ≤1% clay would have the categories Rc50, Rb30-, Ra20- and X1-. 8.

This paper discusses the properties of RCA, the effects of RCA use on concrete material properties, and the large scale impact of RCA on structural members. The review study yielded the following findings in regards to concrete material properties: (1) replacing NA in concrete with RCA decreases the compressive strength, but yields …

This study explores the integration of 3D concrete (3DCP) with recycled aggregate concrete (RAC) and plant fibres, highlighting its role in a…

and it has important implication on natural resources and environment. Recycling of aggregate material from construction and demolition waste can help to reduce the demand-supply gap for aggregates, conserve depleting sources of good quality stone aggregates and decrease environmental degradation due to quarrying activities. …

Concrete is the most used man-made material in the world since its invention. The widespread use of this material has led to continuous developments such as ultra-high strength concrete and self-compacting concrete. Recycled Aggregate in Concrete: Use of Industrial, Construction and Demolition Waste focuses on the recent development …

Furthermore, it was also suggested to use the recycled aggregates from 30 to 50% to achieve the strength equivalent to natural aggregate concrete with supplementary cementitious materials. More research is imperative in the area of unconventional supplementary materials in recycled aggregate concrete and full …

The results indicate that adoption of recycled aggregate concrete as structural material in the high-rise structure, in place of natural aggregate concrete, can result in up to about 2.175 × 10 5 kgC e decrease in carbon footprint in condition of this specific project.

This paper discusses this topic, presents a review on the use of life cycle assessment methodology on natural and recycled aggregates for concrete, and applies this methodology in a real context pertaining the procurement of coarse aggregates to ready-mix concrete plants. A case study of two Portuguese regions, Coimbra and …

Projections for building materials in India, indicated a demand of 400 million cubic meters of aggregates for the year 2021–22 [5]. Recycling and reusing C&D wastes can ease the growing pressure on natural resources [6].

The microstructure of geopolymer concrete made from recycled particles is analyzed using SEM. Using recycled aggregates may have an adverse effect on physical, mechanical and durability characteristics by decreasing workability and compressive strength, more abrasion loss and extending the setting time.

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 …

To promote the application of coarse recycled aggregates (CRAs) sourced from demolished concrete structures has garnered attention for their potential as a sustainable replacement for NA in AAC production. However, incorporating CRA introduces certain challenges, such as variations in material properties and potential contaminants.

Recycled concrete aggregates are produced in stationary recycling plants similar to those used for natural crushed aggregate production. Processing usually includes two-stage crushing (primary with jaw crushers and secondary with impact crushers), removing the contaminants and screening.

The aggregates are tested for physical properties and microstructural analysis. The concrete produced using these treated aggregates is tested for Non-destructive, Mechanical and Durability properties and the results are compared for control concrete, recycled aggregate concrete, and carbonated recycled aggregate concrete.

The reason for recycling is the reduction of waste in order to protect nature against pollution, the increasing shortage of suitable dumping grounds, and to save energy and natural resources. Concrete debris is typically reclaimed as recycled aggregate (RCA). By recycling concrete, valuable landfill space and natural resources are …

In India, the total amount of recycled concrete aggregate (RCA) available amounts to 1.8 million tons per year and is 30% of the C&D waste of 12 million tons of concrete and 50% of concrete is grounded ( CPCB, 2017 ).

At present, many countries and regions worldwide have already formulated recycled concrete technology standards and guidelines. This chapter is based on the research results from the aforementioned chapters and the recycled concrete practical work. In brief, the recycled concrete applied technology guidelines will help in the …

The global sustainable construction aimed to minimize the ecological impacts of constructed facilities' lifetime. In construction, concretes are the major materials utilized in South East Asia. Thus, it makes environmental and economic sense to utilize recycled materials in the production of new concretes for diverse uses. This review …

Manual screening and sorting of waste concrete from C&D debris is the first step of the recycling process. Sub-sequently, the waste concrete goes through different crushing processes to acquire desirable grading of recycled aggregate. Firstly, the large concrete blocks are broken into pieces using impact crusher and also done manually by hammer.

Product Range. Hopley Recycling is a local central Victorian waste resource recycler turning construction and demolition waste into approved and accredited recycled aggregates and road base including crushed brick, recycled concrete and recycled asphalt. Recycled Crushed concrete products have a carbon footprint that is 65% less …