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Using recycled concrete aggregate (RCA) to substitute original aggregate (OA) is of significance for sustainable development of construction materials. However, uncertainties remain with respect to the long-term durability of concrete containing RCA. ... Properties of recycled concrete aggregate and their influence in new concrete production ...
The construction sector is responsible for approximately 6 billion tons of CO 2 emissions [1].Furthermore, the demand for raw material as aggregate for concrete is around 2.7 billion tons/year in EU countries altogether [2], 900 million tons/year in the USA [3], and 700 million tons/year in Brazil [4].Besides, at the end of the construction chain, the construction of …
Properties and composition of recycled aggregates from construction and demolition waste suitable for concrete production August 2014 Construction and Building Materials 65:201–217
After demolition of old roads and buildings, the removed concrete is often considered worthless and disposed of as demolition waste. By collecting the used concrete …
Resource utilization of construction and demolition (C&D) waste has great potential to significantly reduce the consumption of natural resources and improve the …
Recycled aggregate concrete exhibits considerably complicated structure than natural aggregate concrete (NAC) as it contains dual interfacial ... It can be seen that crushed clay bricks use in concrete production might compromise the properties, therefore a more research is required for the optimal usage of crushed bricks in structural ...
Electric arc furnace (EAF) slag is a by-product of steel production in electric arc furnaces. Several studies have tried to demonstrate its suitability in civil engineering application, such as in bituminous mixtures and cement-based materials, due to its good physical, chemical and mineralogical properties. Particularly the re-use as coarse aggregate for concrete …
Recycled aggregate used to produce concrete differs from natural aggregate in t hat it contains old mortar attached to the surface of the aggregate. The RCA recycling process
The results showed that the concrete rubble could be transformed into useful recycled aggregate and used in concrete production with properties suitable for most structural concrete applications ...
This document is a study on recycled aggregate concrete conducted by Neelanjan Sarkar from Murshidabad College of Engineering & Technology. It discusses what recycled aggregate concrete is, its characteristics, classification, production process, uses, applications, and benefits. Recycled aggregate concrete is produced using crushed waste ...
This study focused on the prospect of recycled coarse aggregate for concrete production. The coarse aggregate component of normal concrete was replaced with 25%, 50%, 75% and Recycled Coarse Aggregate (RCA) in a 1:2:4 cement, sand and aggregate mix proportion and 0.5 water/cement ratio. ... the mould measuring 150mm X 750mm X 150mm was ...
Recycling this waste in the form of recycled concrete aggregates (RCA) and substituting it for natural aggregates in the production of concrete could lead to environmental conservation.
Much of the U.S. research focused on using crushed, hardened concrete as an aggregate in fresh concrete has been in mainline paving. Work on this topic began with a major effort in the 1980s in Minnesota. Unfortunately, most of the research focused on using recycled concrete aggregate (RCA) as a base material to the pavement.
The production of construction solid waste has increased with the acceleration of urbanization in various countries around the world. This waste not only occupies land resources but also adversely affects the ecological environment [1, 2].Converting waste concrete into recycled coarse aggregate for secondary utilization is an effective method for the disposal of …
Concrete waste (CW) recycling stands as a promising strategy to promote sustainable construction practices. This research aims to assess the feasibility of using recycled concrete aggregates (RCA) as a surrogate for …
A field study of recycled aggregate concrete in structural and non-structural element. • Compressive strength and rebound hammer correlation of recycled aggregate concrete. • Long term (up to 5 years) in-situ performance of recycled aggregate concrete. • The long-term strength of recycled aggregate concrete was comparable to conventional ...
Concrete is by far the most widely used construction material around the world. The annual world concrete production varies depending on the source between 13 billion [2] and 21 billion tons [95].Dixit et al. [21] pointed out that 49% of raw stone, gravel and sand, 25% of wood and 16% of water are consumed by the building sector. The huge concrete …
This work examines the environmental and geochemical impact of recycled aggregate concrete production with properties representative for structural applications. The environmental influence of cement content, aggregate production, transportation, and waste landfilling is analysed by undertaking a life cycle assessment and considering a life ...
AN INTRODUCTION TO RECYCLED AGGREGATE CONCRETE: PRODUCTION AND APPLICATIONS Piyush Sharma Department of Civil Engineering, Amity School of Engineering & Technology Amity University, Haryana, India Email: piyushsharma1015@gmail ABSTRACT To obtain good quality concrete using recycled aggregate it is necessary to follow the …
The use of recycled aggregates (RA) in the concrete industry has become increasingly popular due to the reduction in natural aggregate (NA) consumption and the ability to reuse demolition waste.
1. Introduction. In recent years, a great deal of research work has been carried out to find alternative ways to reduce construction and demolition wastes, 31% of all waste produced in the European Union (Rodrigues et al., 2013), by the use of recycled aggregate (RA) in the production of concrete.Various authors have studied the use of the recycled aggregates …
The Structural Integrity of Recycled Aggregate Concrete Produced with Fillers and Pozzolans presents a review on the use of by-products, fillers and pozzolanic materials in the development of concrete, with an emphasis on structural integrity. The volume is broken down into key sections, including a review of the types of materials that are used as latent hydraulic supplements, …
After demolition of old roads and buildings, the removed concrete is often considered worthless and disposed of as demolition waste. By collecting the used concrete and breaking it up, recycled concrete aggregate (RCA) is created (Fig. 1).This paper focuses on coarse RCA which is the coarse aggregate from the original concrete that is created after the …
In this scenario, replacing NA with recycled aggregate (RA) from C&DW and other wastes can mitigate environmental problems. We review the use of RA for concrete production and draw the main ...
Urbanization causes growth in construction and infrastructure sectors resulting in rapid production of concrete and related waste. Recycled aggregates from construction waste used in concrete is ...
It is widely reported that recycled aggregate concrete (RAC) with recycled aggregates demonstrates 17–30% reduction in the compressive strength (Kou et al., 2012; Poon et al., 2007), 15–45% loss in the modulus of elasticity (Limbachiya et al., 2012; Poon et al., 2006), 7–26% reduction in the splitting tensile strength (Elhakam et al ...
The strength-formation mechanism for industrial-construction residue cement stabilization of crushed aggregate (IRCSCA) is not clear. To expand the application range for recycled micro-powders in ...
The global aggregate production of 40 billion tons (Fig. 1) is an indication of the vast development projects which are materializing around the world [1].As the land for landfill becomes scarce and the world demand of aggregate reaches to an enormous 40 billion tons annually, ways to use C&D waste is gaining importance due to legislation, it is cheaper and …
The use of recycled aggregates for concrete production is regulated through the European existing standards, and it is limited to the coarse recycled concrete aggregate …
Sustainable concrete production: Mechanical and durability behaviour of slag-based geopolymer containing recycled geopolymer aggregate ... (ITZ) in recycled aggregate concrete under external sulfate attacks and dry-wet cycling. Construct. Build. Mater., 229 (2019), Article 116938, 10.1016/j.conbuildmat.2019.116938. View PDF View article View in ...