Polymers | Free Full-Text | Study on Capillary Water …
The reuse of construction and demolition waste as a substitute for natural coarse aggregate in the production of recycled concrete has been widely used. In order to study the capillary water absorption performance of waterborne-polyurethane-modified recycled aggregate concrete (WPUMRC), the effects of different curing systems, …
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Experimental and computational modeling of chloride …
Exploitation of recycled coarse aggregate (RCA) aimed to produce fully recycled coarse aggregate concrete (FRCAC) has attracted more attention due to the growing requirements for sustainable development and carbon neutralization. In this paper, a novel computational model is developed to study the chloride migration behavior in …
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Material and structural properties of recycled coarse aggregate
This paper presents a review of the research on seawater sea-sand recycled coarse aggregate concrete (SSRAC), which offers a solution to the scarcity of river sand and freshwater while also promoting the reuse of waste concrete. The study reveals that the conventional mix proportion design method underestimates the …
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Properties of concrete incorporating recycled coarse …
Great efforts are made to utilize waste in the construction industry for many different reasons, including the limited non-renewable sources of concrete constituents and getting rid of the burdens of deploying waste and its environmental impact. This study aims to assess the suitability of using recycled coarse aggregate (RCA) and plastic waste …
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Mechanical behavior of recycled coarse aggregate concrete reinforced
Recycled coarse aggregate (RCA) concrete has attracted more and more attention worldwide in recent years due to the exhaustion of natural coarse aggregate and environmental pollution from construction and demolition waste in civil engineering. In this study, experiments were carried out on over 100 specimens to investigate the …
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Recycled Aggregate Concrete: Applications, Advantages
Recycled Aggregate can be used in the following constructions. Can be used for constructing gutters, pavements etc. Large pieces of crushed aggregate can be used for building revetments which in turn is very useful in controlling soil erosion. Recycled concrete rubbles can be used as coarse aggregate in concrete.
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Performance enhancement of recycled coarse aggregate concrete …
The feasibility of recycling C&D waste into coarse aggregate in concrete has been demonstrated by many studies [3], [7], [8], [1], [2], [4], [6]. However, both the compressive strength and elastic modulus of RAC are generally lower than that of normal natural aggregate concrete (NAC) (e.g., [9]). For example, Katz crushed concrete at …
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Mesoscale-based mechanical parameters determination and …
The use of recycled coarse aggregate (RCA) to completely replace natural stone to prepare fully recycled coarse aggregate concrete (FRCAC) can reduce the consumption of natural resources while increasing the resource utilization of construction waste [2, 3]. Compared to natural stone, the old mortar adhering to the outside of the …
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Experimental study on recycled coarse aggregate of concrete
For making recycled coarse aggregate, concrete from a nearby site was used in a testing machine and then by hand with hammers. The broken aggregates are then put through 20 mm, 16 mm, 10 mm, and 4.75 mm sieves, and the aggregates that stay in the 16 mm, 10 mm, and 4.75 mm sieves are used as recycled coarse aggregates that …
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A Comprehensive Review on Recycled Aggregate and …
A total of 600 testing results for coarse recycled concrete aggregate specimens were summarized. With a 95% probability of all the carbonation depths, the …
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Long-term shrinkage and mechanical properties of fully recycled …
Although the use of RCA has an adverse effect on the performance of concrete, recycled coarse aggregate concrete could replace conventional concrete by controlling the quality of recycled aggregates and using a low replacement rate of RCA [18]. Besides, about 40% of waste concrete products are recycled fines, including …
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Review on high-strength recycled aggregate concrete: Mix …
High-strength recycled aggregate concrete (HSRAC) has been extensively studied in terms of mix design, properties, models, and structural behaviour. ... found that the replacement ratio of coarse recycled concrete aggregates (CRCA) had a minor impact on the axial and eccentric load-bearing capacity of HSRACFST columns, but a more …
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Orthogonal experimental design for compressive strength of recycled …
Recycled Coarse Aggregate Concrete (RAC) is a type of concrete that uses recycled coarse aggregate (RCA) instead of natural coarse aggregate (NCA), which helps to reduce the negative environmental impact of construction waste. In order to improve the low compressive strength of RAC and solve the problem of shortage of …
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Recycled Concrete Aggregates: A Review | International …
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 …
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Treated recycled coarse aggregate concrete: A new mixture …
It has been observed that recycled concrete coarse aggregate with water absorption values under 7 % provides saturated surface dry density values over 2300 kg/m 3. 3. As the replacement percentage of recycled coarse aggregate increases in concrete, the compressive strength decreases. However, when the w/c ratio is over 0.6, the …
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Mechanical performance of recycled aggregate concrete in …
Recycled aggregate concrete (RAC) is made by mixing construction solid waste into recycled aggregate according to a certain proportion and gradation after …
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Experimental study on failure mechanism of recycled coarse aggregate
RCA: the recycled coarse aggregate with the initial strength grade of C30 of Qingdao Lvfan group, with a particle size of 4.75 ∼ 26.5 mm, and unstrengthening RCA is marked as O-RCA; Cement: Albo 425 white cement; Fine aggregate: river sand of Qingdao Pingdu with fineness modulus of 2.5; Water reducing agent: polycarboxylic acid ...
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Self-compacting concrete with recycled coarse aggregates from concrete
Properties of Self-Compacting concrete with recycled coarse aggregate. Using RCA from CC&DW in SCC is undoubtedly beneficial, considering the environment as it would allow to eliminate the huge amount of waste. However, in the case of SCC, there are important issues related to RCA usage, that need to be highlighted. ...
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Axial Compression Behavior of Composite Sandwich Panel …
The coarse aggregate produced from the construction and demolished waste of masonry structure is called mixed recycled coarse aggregate (MRA), which is mainly composed of concrete recycled coarse aggregate (CRA) and brick recycled coarse aggregate (BRA). The paper presents the results of an experimental and …
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AN EXPERIMENTAL INVESTIGATION USING …
incorporation of fine and coarse recycled concrete aggregates: Mechanical, dur ability and long-term properties. Construc tion and Building Materials, 154, 29 4 – 309.
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Sustainable Construction Exploration: A Review of Multi …
This paper provides an overview of literature on the multiple-time recycling of concrete waste and meticulously analyzes the research findings. The paper begins by …
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Recycled Coarse Aggregates in Concrete: A Comprehensive …
Addressing the increasing demand for concrete due to advancements in the construction sector and population growth, this research explores the critical intersection of waste management and sustainable construction practices. By incorporating recycled coarse aggregate (RCA) derived from construction and demolition waste into concrete, …
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A practical enhancing method of recycled concrete …
The properties and reuse of recycled aggregate concrete (RAC) are markedly limited by the defects of RCAs, highlighting the need to effectively enhance the properties of RCAs. ... Mechanical strength and drying shrinkage properties of concrete containing treated coarse recycled concrete aggregates. Construct. Build. Mater., 68 …
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Improving recycled coarse aggregate (RCA) and recycled coarse aggregate
Recycled aggregate (RA), including recycled fine aggregate (RFA) and recycled coarse aggregate (RCA), is generated by crushing old concrete from C&D wastes [2], [3]. Recycled aggregate concrete (RAC) uses RA to partly or entirely substitute the natural aggregate (NA).
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Durability evaluation of three generations of repeatedly recycled
Huda et al. [27] studied the mechanical behavior of three generations of repeatedly recycled coarse aggregate concrete. It was found that the first and second generations of recycled concretes (RC) could reach the target strength of 32 MPa at a curing age of 56 d, while the third-generation RC exceeded the target strength by …
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Carbonated recycled coarse aggregate and uniaxial compressive stress
Recycled coarse aggregate for concrete (GB/T 25177-2010), China Architecture & Building Press, Beijing, 2010. Google Scholar [36] L. Butler, J. West, S. Tighe, Quantification of Recycled Concrete Aggregate (RCA) Properties for Usage in Bridges and PavementsAn Ontario Case Study, Innovative Developments in Sustainable …
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Effects of elevated temperature on performance of recycled coarse
The main parameters considered in this study were; i) the type of coarse aggregate (i.e., natural aggregate or recycled aggregate) with varying proportions, ii) the type of cementitious material (i.e., GP, MP or RHA) to substitute 20% of OPC in concrete mixture containing recycled coarse aggregates and iii) the amount of waste steel …
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Study on the stress–strain full curve of recycled coarse aggregate
Recycled coarse aggregate concrete (RCAC) can be made by replacing natural coarse aggregate (NCA) with RCA [5]. The global protection of the environment is growing. RCAC is a green building material, which conforms to the sustainable development strategy of carbon peaking and carbon neutrality goals. In recent years, the research on …
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Materials | Free Full-Text | Experimental Study of Mechanical …
With diminishing natural aggregate resources and increasing environmental protection efforts, the use of recycled fine aggregate is a more sustainable approach, although challenges persist in achieving comparable mechanical properties. Exploration into the incorporation of steel fibers with recycled aggregate has led to the development of …
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Recycled Coarse Aggregates in Concrete: A Comprehensive …
Addressing the increasing demand for concrete due to advancements in the construction sector and population growth, this research explores the critical intersection …
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