Recycled Aggregate Concrete (RAC)
Recycled Aggregate Concrete . ... 75% of the concrete is made of aggregates. Firstly, the contaminants like reinforced steel, foundation material, plastic, wood, bitumen and soils are removed from …
A comprehensive review on the use of recycled concrete …
Recycled aggregates from vertically demolished concrete structures (concrete buildings and bridges) are VRCAg. Those from horizontal demolished structures, e.g., …
Review on high-strength recycled aggregate concrete: Mix …
Recycled concrete aggregates include recycled coarse aggregates (RCA, 5–31.5 mm) and recycled fine aggregates (RFA, 0.5–5 mm). Because of the adhered old mortar on the surface, RA tends to have inferior properties. ... Demolition waste from reinforced concrete or prestressed concrete structures made with medium- to high …
Generation and Numerical Analysis of Random Aggregate Structures …
AbstractA computational modeling procedure for generating a random aggregate structure (RAS) for recycled concrete aggregate (RCA) materials is proposed in this paper. The two-dimensional aggregate generation was based on …
Compressive behaviour of concrete structures incorporating recycled …
Waste concrete, often referred to recycled concrete aggregate (RCA), has been reused as a replacement of the natural aggregate for new concrete mainly for the consideration of environmental benefit and effective utilization of resources. ... (e.g. in building structures), the optimal rubber content should be less than 4% (≤4%), which …
Review An overview of study on recycled aggregate concrete in China
Highlights Research progress of micro- and meso-structure of RAC is introduced in the first part of this paper. The second part of this paper is devoted to the mechanical properties of recycled aggregate concrete material. The third part of the paper gives research on durability of RAC. The last part presents a review on the …
Recycled Concrete in Structural Applications for Sustainable
The use of recycled aggregate has been explored to lead to a sustainable future as it provides an alternative to traditional natural concrete. Experimental investigations showed that concrete using recycled aggregate compared to natural aggregate have lower strength.
Recycled Aggregate Concrete Structures | Semantic Scholar
Semantic Scholar extracted view of "Recycled Aggregate Concrete Structures" by Jianzhuang Xiao. Skip to search form Skip to main content ... Utilizing CO2 to improve plastic shrinkage and mechanical properties of 3D printed mortar made with recycled fine aggregates. Qiong Liu Huilin Tang +4 authors Jianbin Li. Engineering, …
Sustainable Materials: A Review of Recycled Concrete Aggregate
In this paper, a comprehensive literature review was conducted on the utilization of recycled concrete aggregate (RCA), which is the dominant construction and demolition waste material, in base and subbase layers and its comparison with natural aggregate (NA).
Deconstructable Concrete Structures Made of Recycled Aggregates …
Deconstructable Concrete Structures Made of Recycled Aggregates from Construction & Demolition Waste: The Experience of the DeConStRAtion Project. In: Jędrzejewska, A., Kanavaris, F., Azenha, M., Benboudjema, F., Schlicke, D. (eds) International RILEM Conference on Synergising Expertise towards Sustainability and …
(PDF) Concrete using recycled aggregates
Recycled concrete can be used as an aggregate in structures without affecting the strength and performance of the conventional concrete. ... PSTSMA method improve up to 6.35% the …
Materials | Special Issue : Recycled Aggregate Concrete …
The fabrication of conventional concrete, as well as remains from demolition, has a high environmental impact. This paper assessed the eco-efficiency of concrete made with uncarbonated recycled concrete aggregates (RCA) and fly ash (FA). Two concrete series were produced with an effective water/cement ratio of 0.50 (Series …
10 examples of recycled concrete
Materials & Construction. 10 examples of recycled concrete. 8 Mins Read. Concrete has been the rock star of modern architecture: it is strong, versatile, and durable, able to …
A recycled aggregate concrete high-rise building: Structural
The structures were designed by following Chinese building codes while optimizing the mix design of recycled aggregate concrete to achieve similar fresh and …
Destructive Horizontal Load Tests of Full-Scale Recycled …
significantly affected by the incorporation of recycled aggregates. There were also no differences in the cracking response. To the authors' best knowledge, this is the first time that such experiments were made in full-scale recycled-aggregate concrete structures. Keywords: full-scale models; pushover; recycled-aggregate concrete;
Dynamic compressive behavior of recycled aggregate concrete
The dynamic compressive behavior of recycled aggregate concrete (RAC) prepared with five recycled coarse aggregate (RCA) replacement percentages was experimentally studied at strain rates ranging from 10−5 to 10−1 s−1. The effect of strain rate, RCA replacement percentage and moisture condition on the compressive behavior …
Recycled Concrete in Structural Applications for Sustainable
The use of recycled aggregate has been explored to lead to a sustainable future as it provides an alternative to traditional natural concrete. Experimental …
Recycled Concrete: Uses, Advantages and Limitations
For structures that are to be made resilient against earthquakes, the use of recycled concrete is not recommended. ... Certainly, recycled-aggregate concrete only provides nominal strength even in compression and cannot target high strength or even ductility. Water-retaining structures such as dams, water reservoirs, tanks, etc. made of ...
Use of recycled aggregate concrete in structural members: a …
This article presents a comprehensive review on the use of recycled concrete aggregate (RCA) and recycled aggregate concrete (RAC) in construction, …
Use of fine recycled concrete aggregates in concrete: A …
Although the use of fRCA in structural concrete was reported to have positive environmental impact [38], studies have indicated several issues when using fRCA regarding fresh and hardened properties of new concrete.For example, high water absorption of fRCA may lower concrete workability; adhered mortar introduces more …
Sustainability | Free Full-Text | Recycled Concrete as Aggregate …
A comparative analysis of the experimental results of the properties of fresh and hardened concrete with different replacement ratios of natural with recycled coarse aggregate is presented in the paper. Recycled aggregate was made by crushing the waste concrete of laboratory test cubes and precast concrete columns. Three types of …
Recycled Concrete Aggregate: Crushed Concrete
Recycled Concrete Aggregate Price. Recycled Concrete Aggregate cost in the USA is around $15 to $ 55 per ton, around $18 to $80 per cubic yard, and $2 to $5 per cubic foot, with price, depending on the quality and quantity of recycled aggregate. You May Also Like: Pervious Concrete- Its Application & Advantages
Toward a codified design of recycled aggregate concrete …
The use of recycled aggregate (RA) to produce recycled aggregate concrete (RAC) is a proven way of decreasing the consumption of natural aggregate (NA) and the …
Strength and Durability Performance of Recycled Aggregate …
AbstractThe present study illustrates the susceptibility of optimized-quality recycled concrete aggregate (RCA) to supplementary cementitious materials (SCMs), such as silica fume (SF), ground granulated blast slag (GGBS), and mechanically produced ...Practical ApplicationsAbout 20% to 30% of recycled fines (M-Fines) below …
Mechanical properties and pore structure of recycled aggregate concrete
Thus, we prepared four different concretes, including natural aggregate concrete (NAC), recycled aggregate concrete (RAC), TRAC and fiber-reinforced tailings recycled aggregate concrete (TRAC-PP) series. PP fibers were used as supplementary material at different percentages (0.3%, 0.6%, 0.9% and 1.2%) and compared with NAC, …
Recycled aggregates from construction and demolition
The higher porosity of recycled aggregate concrete acts as a presumable canal for water transport. On average, recycled aggregate concrete absorbs 25% more water than conventional concrete, independently of type and quantity of binder [47, 59]. This higher water absorption capacity affects the actual w/c ratio of concrete as …
Recycled Aggregate Concrete | SpringerLink
4.2.1 Review Points. The basic idea of NAC mix proportion design in China [] is that the concrete mix proportion design depends on three parts: the w/c ratio, water amount, and sand- aggregate ratio.According to the preparation of the concrete strength and the actual strength of cement, the w/c ratio is obtained by calculations using the …
A comprehensive review on the use of recycled concrete aggregate …
The construction sector also imposes a very high quantity of solid waste on the environment during the construction and after the service life of structures (Kisku et al., 2017, Shi et al., 2019).Thus, making the construction industry a major contributor to the global carbon footprint (Santero et al., 2011).According to Anit et al., the concrete …
(PDF) Recycled Concrete Aggregates: A Review
Recycled Concrete Aggregates: A Review. March 2013; International Journal of Concrete Structures and Materials 7(1) DOI: ..., concrete specimens made with up to 30 % RCA had.
Recycled Aggregate: A Viable Solution for Sustainable Concrete …
1. Introduction. Concrete is the second most used material by volume on Earth. Portland cement is the main binder of concrete, and its production (estimated at 4.3 bi ton/year) accounts for about 8% of the global CO 2 emission [].Besides the CO 2 emission released by cement production, large amounts of sand and gravel are …