A mini review on generation, handling, and initiatives to …
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). The study also indicates that the metro cities having population more than 5 million are generating more than 2000 TPD …
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Recycled aggregate concrete: Particle Packing Method …
The concrete mixtures were prepared using Ordinary Portland Cement (OPC) of 53 Grade conforming to Bureau of Indian Standard Specifications (BIS) (IS: 12269–2013) [93], Natural Coarse Aggregate (NCA), Recycled Coarse Aggregate (RCA), clean river sand conforming to grading Zone II (IS: 383–1970) [94] and potable water. …
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recycled concrete Topic
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 …
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Challenges and Opportunities for Sustainable Construction
In so far as the use of concrete in India is concerned, IS 456, IS:1343, and IRC 112 do not permit the use of aggregate other than those obtained from natural sources, and confirming to IS:383 reusing construction demolition waste is different from recycling, it does not require any further processing to convert into a useful product.
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Construction and demolition waste as recycled aggregate …
Recycled aggregates (RA) from construction and demolition waste (CDW) instead of natural aggregates (NA) were analysed in the manufacture of new eco-friendly concrete. Fine (FRA) and coarse (CRA) recycled aggregates were used in different percentages as substitutes of natural sand and gravel, respectively. The results revealed …
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Use of RECYCLED AGGREGATES In CONCRETE- A Paradigm …
The fine aggregate used in the concrete, i.e. recycled and conventional is 100 percent natural. The recycled aggregate are collected from four sources all demolished structures. For both types of concrete i.e. M-20 and M-25, w/c ratio, maximum size of aggregate and mix proportion are kept constant.
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Investigations on Fresh and Hardened Properties of Recycled Aggregate
Concrete made using aggregates from the construction and demolition waste is referred to as recycled aggregate concrete (RAC). Many researchers [1–7] have studied the workability, strength aspects and cost effective of RAC and compared it with that of normal aggregate concrete.The workability of RAC for the same water content as …
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Sustainability assessment of recycled aggregate concrete …
This certification comprises an exclusion criterion for applicants who do not comply with the concrete recycling provision except if the distance between the concrete plant and the site exceeds 25 km. 111. 5 CONCLUSIONS. The sustainability assessment of recycled aggregate structures should consist of environmental, social, and economic …
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An Improved Methodology for Making Recycled Concrete Aggregate …
The following tests have been carried out on recycled concrete aggregates sourced from rock crystal Kerala crushers in Maranayakanahalli, Bengaluru. 3.1.1 Workability. The workability of concrete has been ascertained by slump cone test by replacing natural aggregates with recycled aggregates at varying percentage as per the standards …
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Sustainability Assessment of Concrete Pavements with Recycled Concrete …
The use of DRCA for pavements, in addition to the sub-base and sub-grade [], could be suitable, as safety or strength is not the only criteria for the design or application.Further, the environmental impact of recycled concrete aggregates in terms of the consumption of non-renewable resources is much lower compared to NA [15, …
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CHALLENGES AND PROSPECTS OF DEMOLITION WASTE …
Recycled concrete aggregates can be used in many applications that include reinforced concrete. However, the use of recycled ... recycled aggregates in India does not exceed 1.2 million tonnes ...
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Construction Aggregate Meaning, Types, Prices in India in …
Rs 50. 20 mm. Rs 50. 40 mm. Rs 56. Aggregate is versatile, affordable, and the most commonly used building material around the world. The variety of aggregate available can be used in specific construction projects. However, to know the best aggregate type, it is important to consult a construction specialist.
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Use of Recycled and Secondary Aggregates in Concrete: …
Recycling of existing concrete is a fairly simple process known as breaking, removing, and bringing existing concrete to a certain size [6]. It is stated that the amount of recycled and secondary ...
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(PDF) Status of C&D Waste Recycling in India
C&D waste management in India was the s etting up of a pilot recycling facilit y in. New Delhi. In Ne w Delhi (the cap ital city of India), around 4000 tons of C&D waste. is being generated every ...
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Recycled Aggregate in Concrete: Use of Industrial, …
Recycled Aggregate in Concrete: ... He obtained a Ph. D. degree in chemistry (material science) from Dibrugarh University (India) in 2003. His research interest includes the solid waste management, chemistry of cement and allied materials, environmental chemistry and concrete science. He has published more than 50 numbers of research articles ...
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Utilization of recycled aggregates in cement-treated …
Recycled materials with suitable engineering properties can be used as substitutes for natural aggregates (NA), an economically feasible and environmentally friendly alternative. Various recycled materials such as reclaimed asphalt pavement (RAP), recycled concrete aggregate (RCA), crushed brick (CB), fine recycled glass (FRG), …
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Use of recycled aggregates arising from construction and demolition
The recycled aggregate concrete (RAC) exhibited lower density, compressive and indirect tensile strength when compared to that of control concrete. The densities of RAC ranged from 2.16 to 2.21 Mg/m 3. The average 28-day compressive strength of the 15 cores taken from the pavement was of 31.8 MPa. The average indirect …
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Particle Packing Approach for Proportioning Recycled Aggregate …
Use of recycled concrete aggregate in construction industry has brought a revolutionary change in enhancing sustainability, improving economy, implementing waste management rules, conserving non-renewable energy resources. The present work gives an insight into proportioning the recycled concrete aggregates from building demolition …
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Cost-Benefit Analysis of Using Recycled Coarse Aggregate …
This study attempted to design two mix proportions for natural aggregate concrete (NAC) and recycled aggregate concrete (RAC). RAC supplemented with Hooked Steel Fibers at a rate of 0%, 0.25%, 0.5 ...
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Crystals | Free Full-Text | Use of Recycled Concrete Aggregates …
Recycled concrete aggregates (RCA) are used in existing green building composites to promote the environmental preservation of natural coarse aggregates (NCA). Besides, the use of RCA leads to potential solutions to the social and economic problems caused by concrete waste. It is found that insufficient information on the …
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Construction and demolition waste generation and properties of recycled
Recycled aggregate concrete exhibits considerably complicated structure than natural aggregate concrete (NAC) as it contains dual interfacial transition zones (ITZ) between old mortar and aggregate and new mortar and old mortar which increases the porosity and causes the reduction in strength (Liu et al., 2011).
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Use of waste ceramics to produce sustainable concrete: A …
Ceramic tile production in India was 1,080 million sq. meters in 2018. The production of ceramic tile is reported in the top 10 countries with a major share by China (47%), India (8%), Brazil Vietnam, and Spain. ... conventional concrete and recycled aggregate concrete (Senthamarai et al., 2011).
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Recycled Concrete Aggregates: Its Classification, Properties & Uses
According to the 'BRE Digest 433' (1998) (Building Research Establishment-UK), recycled concrete aggregates are classified into three types :-. A). Class RCA-1 :-. The origin of RCA-1 is brickwork. It contains about of …
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Reviewing the properties of recycled concrete aggregates …
Iron Slag (IS) is a vital by-product sourced from Iron and Steel industry. Recycled Concrete Aggregates (RCA) are by-product sourced from construction industry. IS and RCA can be used as alternative of conventional aggregates (fine and coarse). Influence of IS and RCA as distinctive use in concretes has been reviewed.
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Environmental implications of the use of bio-cement treated recycled …
The Monte Carlo Simulation confirms the statistical validity of the LCA results as the standard deviations for GWI were found between 1.6% and 3.2% of the mean values for these four different concrete mixes. Whilst recycled aggregates base concrete mixes were not found to offer the same level of environmental performance in terms of GWI and …
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Economic viability analysis of recycling waste plastic as aggregates …
The recycled aggregate concrete is a sustainable concrete waste which in the long term can replace the demand for natural aggregate, a process which would, in turn, lead to its preservation ...
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A study on recycled lightweight aggregate concrete
The major waste source in India comprises of construction and demolition (C&D) waste. Out of this, a huge extent of valuable serviceable material disposed-off as landfills. ... concrete from construction and demolition waste material (C&D), recovered aggregate from asphalt pavement. Coarse Recycled Concrete Aggregate (RCA) is …
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Recycled Concrete | ScienceDirect
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.
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A review of geopolymer concrete incorporating recycled aggregates …
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. Additionally, the research demonstrates that geopolymer concrete made with recycled aggregates has a denser, …
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Recycled Aggregate Concrete Structures | SpringerLink
The world's first book on recycled aggregate concrete (RAC) structures. Based on the author's ten years of fundamental studies on the material properties and structural behavior of RAC. Includes first-hand experimental and simulation results on RAC. Includes some typical demonstration structures with RAC.
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