Recycled Concrete

Transportation costs, energy use and wear and tear on roads and equipment are all reduced. The recycled aggregate is used as soon as it is processed. Recycled concrete currently supplies about 5% of aggregate use. The bulk of recycled aggregates – about 68 % – is used as road base. The remainder is used for new concrete mixes (6%), asphalt ...

Machine Learning Prediction Models to Evaluate the Strength of Recycled

recycled aggregate concrete (RAC) is comparatively lower than that of natural aggregate concr ete. Several factors, including the recycled aggregate replacement ratio, parent concr ete strength ...

Prediction of mechanical properties of recycled aggregate …

This paper investigates the mechanical properties of concrete containing recycled aggregates and fly ash as a sustainable and eco-friendly solution for construction, which can reduce the demand for natural aggregates and cement, conserves natural resources, and curtails greenhouse gas emissions.Machine learning methodology can be a viable substitute for time …

Influence of treated recycled concrete aggregate and …

The variations in mechanical properties of geopolymer concrete (GPC) prepared with treated recycled concrete aggregate (RCA) in conjunction with a modified two-stage mixing approach (M-TSMA (sp-ggbs)) have been studied in the present research.Since GPC is prepared using fly ash (FA) and ground granulated blast slag (GGBS) as an alternative to cement, it is …

Crushing and Screening Equipment for Concrete Recycling

Recycled aggregates are used as soon as they are processed. Concrete crushing equipment manufacturers are committed to providing efficient stationery crushing plants and mobile crushing plants to enable concrete recycling anywhere. A complete concrete recycling plant involves concrete crushing and concrete screening. Concrete crushers

Effect of Treated/Untreated Recycled Aggregate Concrete …

Using recycled concrete aggregates from construction and demolition wastes on structural concrete is a sustainable solution to reduce the consumption of natural resources and the detrimental effects of concrete production on the environment. This paper has collected much data from the literature to study fresh, mechanical properties and durability of concrete made …

Sustainable Materials: A Review of Recycled Concrete Aggregate

Surface image of natural and recycled concrete aggregates (a, c, e: Recycled concrete aggregate; b, d, f: Natural aggregate) (64-66). Figures - uploaded by Ali Mardani Author content

Study of recycled concrete properties and prediction using machine …

Some scholars have investigated the influence of recycled brick aggregate (BA) content on concrete properties. Liu et al. [3] used coconut shell crushed aggregate and BA to replace natural aggregate (NA) in the production of RAC.Their testing revealed that the mechanical properties of RAC not only met the requirements for lightweight aggregate …

(PDF) Design Strategy for Recycled Aggregate …

Currently, a number of disadvantages hampers the use of recycled concrete aggregates (RCA). The current review proves that concretes made with complete replacement of natural aggregate with RCA ...

Predicting the Splitting Tensile Strength of Recycled Aggregate

This study used the novel algorithms of machine learning (ML) to forecast the splitting tensile strength (STS) of concrete containing recycled aggregate (RA). The gene expression programming (GEP ...

Recycled Aggregates Concrete Compressive Strength …

The recycled aggregate is an alternative with great potential to replace the conventional concrete alongside with other benefits such as minimising the usage of natural resources in exploitation to produce new conventional concrete. Eventually, this will lead to reducing the construction waste, carbon footprints and energy consumption. This paper aims to study the …

Using and optimizing the recycled aggregates in concrete: …

A general review of how recycled aggregates were used by previous researchers in recent years and their findings are reviewed in this review paper. In addition, methods for enhancing the mechanical characteristics of recycled aggregate and long-term efficiency such as improving the properties without modifying the recycled aggregate (namely ...

Aggregates for Concrete

Chapter 7—Recycled aggregates, p. E1-23 7.1—Introduction to recycled aggregates 7.1.1—Definition 7.1.2—Properties Chapter 8—Selected references on aggregates, p. E1-24 ... Sieve sizes commonly used for concrete aggregates are detailed in Table 1, and various physical properties of normalweight aggregates, with typical range values ...

Prediction of split tensile strength of recycled aggregate concrete

Recycled aggregate concrete (RAC) has been adopted in building construction as it can reduce concrete waste, eventually minimizing the environmental impact. However, using recycled materials can lead to compromised performance of mechanical properties like split tensile strength (STS). Several factors, including density, water absorption, and recycled …

Prediction on compressive strength of recycled aggregate …

Concrete is widely used in engineering projects all over the world. According to the research of Modani and Mohitkari et al. [1], nearly 70% of concrete is composed of aggregates.The waste aggregates generated by using construction and demolition waste in cast-in-situ concrete meet the requirements of an ecological environment.

Mixture Optimization of Recycled Aggregate Concrete Using Hybrid

Recycled aggregate concrete (RAC) contributes to mitigating the depletion of natural aggregates, alleviating the carbon footprint of concrete construction, and averting the landfilling of colossal ...

Bond strength between recycled aggregate concrete and …

After one end of the rebar is buried in the recycled aggregate concrete mix and cured for a particular time, it becomes resistant to being pulled out when an external force F is applied to the other end of the rebar. This indicates the existence of forces acting at the interface between recycled aggregate concrete and rebar, i.e., bond stresses [35].

Enhancing Sustainable Concrete Production by Utilizing Fly …

Over the last decade, there has been a substantial increase in the amount of construction waste, leading to growing societal and environmental concerns around the recycling of this refuse. Concrete waste is one of the most significant forms of construction waste. As a result, in order to examine the influence of recycled coarse aggregate (RCA) on concrete, …

Recycled Aggregate Concrete Made with Silica …

Bending machine used for flexural strength. 3. Results of Tests and Discussions ... Recycled aggregate concrete has the potential to provide commensurate or even superior strength and durability ...

Recycled Aggregates

It is the prerequisite for recycling waste concrete that the technique of reclaiming, crushing, and manufacturing recycled aggregate (RA). Based on the existing …

Compressive strength of concrete with recycled …

the 3,7‐and 28‐day compressive strength of concrete using machine learningbased approaches. To this aim, the paper is presented in two parts. Firstly, linear, nonlinear regression and Random ...

Performance Improvement of Recycled Concrete Aggregates …

In the construction industry, natural aggregates (NA) can be replaced by recycled concrete aggregates (RCA), which can address the issue of construction-waste disposal and resolve the dilemma between demand and supply. This paper aims to systematically review the modification of RCA techniques and their application in producing recycled …

Application of Aggregates from Construction and …

Concrete has become a widely used building material, with the global concrete consumption estimated to be around 14 billion cubic meters in 2020, according to statistics from the Global Cement and Concrete Association (GCCA) [].Aggregates in concrete are an essential component, constituting approximately 75% of the total volume, and the ratio of fine …

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, waste …

Strength and durability of concrete containing recycled concrete aggregates

Silva et al [21] conducted a meta-analysis of the data related to RCA concrete and concluded that RCA aggregates produce better concrete compared to concrete made of other recycled aggregates. The mechanical properties such as compressive strength, splitting tensile strength, flexural strength and modulus of elasticity of RCA concrete were found to decrease …

Sustainable building materials-recycled aggregate and concrete…

Table 5 provides the ratio of recycled aggregate pervious concrete used in the collected literature, and the water to cement ratio is generally between 0.3 and 0.45. In addition, we found that these studies have taken measures to various degrees: adding additional mixing water during preparation or the RA is immersed in water in advance to ...

Carbon Sequestration by Preparing Recycled Cement, Recycled Aggregates …

In summary, for a typical concrete mix (both normal concrete and recycled concrete) with 0.19 tons of cement and 0.74 tons of aggregates for per ton of concrete (remaining 0.07 tons of water for hydration and workability), the CO 2 emission of per ton of recycled concrete produced or recycling use of per ton of waste concrete from Figure 7 is ...

Recycled Concrete Aggregates: A Review | International …

Modification of Recycled Concrete Aggregate and Its Use …

The differences in physical properties, chemical properties, and mechanical properties between reclaimed concrete aggregate and natural aggregate are discussed in this paper. In this paper, the commonly used improvement techniques of recycled concrete aggregate are reviewed. Physical modification involves peeling the attached mortar layer …

Prediction of mechanical properties of recycled aggregate …

Recycled aggregate concrete (RAC) is a form of concrete made from recycled resources. ... Evaluating compressive strength of concrete made with recycled concrete aggregates using machine learning approach. Construct. Build. Mater., 323 (Mar. 2022), 10.1016/j.conbuildmat.2022.126578. Google Scholar [35] B.A. Salami, et al.