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recycled aggregate and process
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Modification of Recycled Concrete Aggregate and Its Use in …
The research shows that the production and recovery process of recycled aggregate is accompanied by high energy consumption, a lot of dust pollution, and other problems. In addition, the quality of recycled aggregate produced is not high, and it exhibits poor adaptability [98,99,100,101].
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Study on fracture parameters and fracture process zone of …
The compressive strength, tensile strength, Young's modulus and fracture parameters of RAC generally decrease with the increase of recycled aggregate replacement rate [16], [17], [18], and its attenuation degree is related to the quality of recycled aggregates [19], preparation process [20] and improvement measures [21], [22].
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The process development of cullet and recycled glass aggregate …
Many WGBs (Waste Glass Bottles) have been disposed in landfill by conventional recycling process, and thereby the recycling process requires improvement to increase the recycling rate. In this study, the WGBs recycling process which can produce cullet and recycled glass aggregate was developed, and Color sorting and …
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The Durability of Recycled Fine Aggregate Concrete: A Review
The fully recycled fine aggregate obtained by this process has excellent physical properties and can replace of the river sand in concrete . In this paper, the durability of RFAc is reviewed in terms of impermeability, drying shrinkage, carbonation resistance, chloride penetration resistance, acid resistance, and freeze–thaw resistance.
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The environmental benefits of recycled aggregates
Recycled aggregates are re-processed aggregates derived from demolition or construction waste; There are many sources of material for recycled aggregates, and each type of material will undergo a number of specific processes to turn it into a valuable construction material. Types of recycled aggregate: Type 1, 6F2, Dust and Sand, Topsoil, Pipe ...
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Durability of Recycled Concrete Aggregates Prepared with
The reused or recycled aggregate generated from concrete or asphalt is also considered a resource with additional high value as an option for the natural aggregate resources, ... This process covers the testing of aggregates to determine resistance to disintegration by a repeated freezing and thawing cycle using the Test Method LS-614. …
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Recycled Aggregates for Concrete Production: State-of-the-Art
In this chapter, a review about the most commonly used recycled aggregates is given, i.e. recycled aggregates from C&DW and from metallurgical slag, with a …
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Comparative Environmental Impacts of Recycled Concrete Aggregate …
About 7% of the world's energy is used to extract, handle and process raw resources (Beccali et al. 2010).The construction industry uses 40% of the natural resources extracted from the earth's crust and generates 35% of the solid waste globally (Rosado et al. 2017).Haphazard mining of the river sand and other natural aggregates poses a …
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Development of low-carbon recycled aggregate concrete …
Research has explored the potential of recycled aggregate (RA) as a viable alternative to natural aggregate in concrete production. Currently, several treatment methods are being employed to enhance the efficient incorporation of RA into concrete, aiming to address this issue. ... (2004) Assessment of recycling process induced …
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Sustainability | Free Full-Text | A Comprehensive Review on Recycling …
As a result, incorporating recycled aggregate (RA) in concrete production is a prudent course of action to reduce the environmental impact. This study reviews prior research on using recycled aggregate instead of conventional ingredients in concrete. ... Effective recycling processes and the use of concrete debris will enable the …
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Interaction effect of recycled aggregate type, moisture …
Thoroughly clean the aggregate. This will help remove any dirt, debris or contaminants that could weaken the concrete and make it more susceptible to cracking. Avoid recycled aggregate contaminated with organic materials such as wood, plastic, or asphalt. • Use a mix design developed specifically for recycled aggregate.
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Understanding the different types of recycled aggregates
Recycled Aggregate Types. Recycled Type 1 (Sub-Base) Type 1 recycled aggregate is a type of recycled construction material that is produced from crushed concrete and sometimes includes other materials such as brick, asphalt, or rock. It is often used as a sub-base material for road construction, pathways, and hard-standing areas.
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Influence of Amount of Recycled Coarse Aggregates and …
@article{Etxeberria2007InfluenceOA, title={Influence of Amount of Recycled Coarse Aggregates and Production Process on Properties of Recycled Aggregate Concrete}, author={Miren Etxeberria and Enric V{'a}zquez and Antonio Mar{'i} and M. Barra}, journal={Cement and Concrete Research}, year={2007}, volume={37}, …
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Recycled Aggregate: A Viable Solution for Sustainable …
Recycled Aggregate: A Viable Solution for Sustainable Concrete Production - PMC. Learn More Try it out now . Advanced Search. Journal List. Materials (Basel) …
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A Comprehensive Review on Recycled Aggregate and
This study provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, recycling, reuse and manufacture process, inherent defects (e.g. existing of additional interfacial transition …
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Effects of nano-particles on failure process and …
To improve the durability of geopolymer recycled aggregate concrete based on waste concrete powder (WCP), and realize its application and promotion, this study utilized WCP, fly ash (FA), and ground granulated blast-furnace slag (GGBS) as raw materials, and recycled concrete aggregate (RCA) as aggregate, with Nano-SiO 2 as …
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Incorporating coarse and fine recycled aggregates into
Materials and reagents. The application of recycled concrete aggregates (RCA) serves as a widely embraced method on behalf of repurposing concrete waste, aligning well with the principles of sustainable development [].The primary objective of the experimental program is to assess the feasibility of substituting coarse and fine natural …
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Comminution and sizing processes of concrete block waste as recycled
The three investigated comminution processes allow for the production of recycled aggregates with grain size distributions similar to those commonly used in concrete block production (Fig. 2): coarse aggregate (0–9.52 mm) and fine aggregates (0–4.75 mm and 0–2.36 mm), NAT-1, NAT-2 and NAT-3.
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Sustainability | Free Full-Text | A Comprehensive …
As a result, incorporating recycled aggregate (RA) in concrete production is a prudent course of action to reduce the environmental impact. This study reviews prior research on using …
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recycled concrete Topic
Recycled Concrete. Definition: hardened concrete that has been processed for reuse, usually as aggregate.-. ACI Concrete Terminology. 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.
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Recent developments in asphalt-aggregate separation …
The physical asphalt-aggregate separation process is relatively easy to realize for specified devices. (2) Chemical asphalt-aggregate separation process. Chemical asphalt-aggregate separation is mainly realized through chemical solvents to separate asphalt and aggregate. Asphalt is an organic material, which is soluble in …
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Recycled Concrete Aggregate | Usage & Benefits | RUBBLE …
A concrete crusher breaks up chunk concrete and fractionates the material so that you generate a new recycled concrete aggregate product. The cement dust that is generated helps to compact the material nicly and makes a good roadbase. The quality of the recycled concrete aggregate depends on the feed material and the crushing process.
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Sustainable Materials: A Review of Recycled Concrete …
Sustainable Materials: A Review of Recycled Concrete Aggregate Utilization as Pavement Material. Burcu Aytekin and Ali Mardani-Aghabaglou View all …
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Effects of nano-particles on failure process and …
The study on recycled aggregate concrete (RAC) have become a hot topic in the field of construction material. A lot of researchers realized that RAC can effectively recover waste into useful resources. ... Failure processes of modeled recycled aggregate concrete under uniaxial compression. Cem. Concr. Compos., 34 (10) (2012), pp. 1149 …
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Recycled Aggregates for Concrete Production: State-of …
During the process of recycled aggregate production, the undesirable fractions are eliminated, and through grading and sorting, recycled aggregates are obtained. Also at the European level, the statistical significance of figures about C&DWs production is quite poor, and the different available sources are reporting fragmented …
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Influence of amount of recycled coarse aggregates and production
In this study recycled coarse aggregates obtained by crushed concrete were used for concrete production. Four different recycled aggregate concretes were produced; made with 0%, 25%, 50% and ...
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Sustainable Materials: A Review of Recycled Concrete Aggregate …
In this paper, a comprehensive literature review was conducted on the utilization of recycled concrete aggregate ... Marí A., Barra M. Influence of Amount of Recycled Coarse Aggregates and Production Process on Properties of Recycled Aggregate Concrete. Cement and Concrete Research, Vol. 37, No. 5, 2007, pp. …
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Influence of amount of recycled coarse aggregates and production
In this study recycled coarse aggregates obtained by crushed concrete were used for concrete production. Four different recycled aggregate concretes were produced; made with 0%, 25%, 50% and of recycled coarse aggregates, respectively. The mix proportions of the four concretes were designed in order to achieve the same …
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(PDF) A REVIEW OF RECYCLED CONCRETE AGGREGATES …
Recycled aggregate concrete is produced by fully or partially substituting ordinary aggregates with recycled aggregates derived from construction waste. Therefore, utilizing waste concretes could ...