Recycled Coarse Aggregate Headquarters In Ghana

A Study on Mechanical and Microstructural Characteristics of …

The objective of this paper is to provide a comprehensive study about the performance of concrete using mixed coarse recycled aggregate (MCRA) as an alternative for natural aggregate (NA) at replacement levels of 0, 30, 60, and , which can greatly reduce the environmental pollution by incorporating the construction and …

Properties of recycled aggregate and recycled aggregate …

In the present investigation, an attempt was made to study the influence of the strength of parent concrete on the properties of recycled aggregates and recycled aggregate concrete. In this study, four grades of normal concrete mixes: M20, M25, M30, and M40 were considered as parent concrete to produce the recycled coarse …

EXPERIMENTAL INVESTIGATIONS OF COARSE …

The results of compressive strength of natural coarse aggregate and recycled coarse aggregate of concrete cubes and cylinders are tabulated and graphs are provided. Compressive strength of NCA and RCA cubes for different grades (M 20, M 25and M 30) at 3, 7, 28 and 90 days of curing are shown in Table 4 and figures 4-6. 0 20 40 60 80 100 …

Simulation on Compressive Property of Concrete with Large-Size Recycled

The uniaxial compression behavior of concrete with 0.98 to 3.15 in. (25 to 80 mm) large-size recycled coarse aggregate (LRCA) was numerically studied. ... ACI World Headquarters 38800 Country Club Dr. Farmington Hills, MI 48331-3439 USA Phone: 1.248.848.3800 Fax: 1.248.848.3701. ACI Middle East Regional Office

Self-compacting concrete with recycled coarse aggregates …

Based on Eurostat – European Statistical Office, European Union is the source of around 895 400 t of waste per year (waste from mining not included) [24].About a third comes from the civil engineering sector [25] and so having a huge influence on the final score. Wastes from mineral excavation in Poland in 2022 are forecast at 64 300 …

Mechanical features and durability of concrete incorporating recycled …

1. Introduction1.1. Concrete contained recycled coarse aggregate and nano-silica. Over the past several years during which the total life cycle concept has been put forward in the construction industry, a number of researchers have conducted some investigation about the feasibility of reusing waste concrete ingredients [1].The …

Hardened properties of 3D printed concrete with recycled coarse aggregate

Natural coarse aggregate (NCA) was natural gravel, and RCA was recycled concrete coarse aggregate, which was obtained from demolished concrete buildings through crushing, screening, sieving and grading and was purchased from Shaanxi Jianxin Environmental Protection Technology Co. Based on the maximum bulk density of …

A comprehensive review on the use of recycled concrete …

Fig. 10 shows concrete containing natural coarse aggregate and recycled brick coarse aggregate (Liu et al., 2021). Hence, the RCA's physical, chemical, and …

Recycled Coarse Aggregates in Concrete: A Comprehensive …

Recycled Coarse Aggregates (RCA) are produced using an impact crusher, which processes damaged concrete sourced from construction and demolition waste into the required sizes. The RCA exhibits passage on a 40 mm sieve and retention on a 4.75 mm sieve, with 92.10% and 0.38% of the material passing through 20 and 10 …

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 …

A critical review and assessment for usage of recycled …

1.1. Significance of recycled aggregates. Construction industry has seen massive expansion in the 20th and 21st century. The construction sector is the second …

Recycled Concrete Aggregates: A Review | International …

Examining the structural viability of recycled fine aggregates …

This study investigates the potential of incorporating recycled fine aggregates (RFA) into sustainable concrete. In this research, a conventional compaction technique is utilized to establish the order of compressive strength and, consequently, to assess particle packing density in terms of weight within a specific cylindrical volume …

Recycled Concrete Aggregate (RCA)

Recycled Concrete Aggregate (RCA) To align with Singapore's vision in construction sustainability, Eastern Continent also recycle concrete debris from demolishing works and convert them into useable products as Recycled Concrete Aggregate (RCA). The primary process will be using excavator and jaw crusher to break up the concrete hardcore.

A critical review and assessment for usage of recycled aggregate …

1.1. Significance of recycled aggregates. Construction industry has seen massive expansion in the 20th and 21st century. The construction sector is the second largest carbon dioxide emitter, accounting for roughly 33% of the total global carbon dioxide emission [7].Globally buildings cause 33% of the total greenhouse gas emission and …

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.

A novel approach for optimizing the processing of recycled coarse

C & D waste aggregates are primarily used in the sub-base layer of road and embankment constructions. The rationale for not employing recycled coarse aggregate (RCA) for structural purposes is that, its properties are inferior to natural aggregate (NA) [10].The main disadvantage of RCA is that it has a lower specific gravity and absorbs …

Properties of concrete incorporating recycled coarse aggregates …

Recycled concrete aggregates. Recycled concrete aggregates (RCA) (Fig. 1e) were obtained from Saudi Investment Recycling Company (SIRC) [] from 25 MPa concrete and used to replace the natural coarse aggregates at replacement levels of 40% and 60%.Sieve analysis was performed, as shown in Fig. 2, and other physical …

Effect of epoxy resin surface-modified techniques on recycled coarse …

The absorption of water by recycled coarse aggregates (RCAs) is significantly greater than that by natural coarse aggregates (NCAs), which affects the mechanical properties of recycled aggregate concrete (RAC). To mitigate this issue and enhance the mechanical strength of RCAs, a water-based epoxy resin was utilized to …

Sustainable Materials: A Review of Recycled Concrete …

Abdulla N. A. Effect of Recycled Coarse Aggregate Type on Concrete. Journal of Materials in Civil Engineering, Vol. 27, No. 10, 2015, p. 04014273. Crossref. …

Coarse Aggregates: Types, Properites & Applications

Coarse aggregates give strength to concrete, the sand which is fine aggregates, fills the void in coarse aggregates and is a cement binder. Section Under Material; Share on: by Admin. Hello, I'm Rahul Patil founder of Constructionor, I had studied B.E. Civil. This blog provides authentic information regarding civil structures, equipment ...

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). RAC is an environmentally friendly material that decreases …

The morphological characteristics of brick-concrete recycled coarse

Due to the complication of sources and types of CDW, there are great differences in properties among recycled coarse aggregates [6, 7].Most of the demolished buildings in Chinese cities are brick-concrete structures built in the 1960s–1980s, and such recycled aggregates are mainly composed of crushed brick aggregate and crushed …

Early-stage water-absorbing behavior and mechanism of recycled coarse …

In this study, different types of modeled recycled coarse aggregates (MRCAs) were prepared to investigate the effect of the quality and quantity of the attached mortar on the water-absorbing behavior (WAB) of RCA using an improved hydrostatic weighing method, as well as MIP and X-CT tests. The results showed that the WAB of …

Compressive strength and microstructural analysis of recycled coarse …

The use of recycled coarse aggregate (RCA) obtained by crushing, screening, and washing construction and demolition wastes to produce recycled aggregate concrete (RAC) can alleviate the shortage of concrete raw materials and promote waste concrete recycling [1], [2], [3], [4].However, compared with natural coarse aggregate …

Effect of Modification and Replacement Rate of Recycled Coarse

The modification method and the replacement rate of recycled coarse aggregate (RCA) have a great influence on the properties of recycled aggregate concrete (RAC). This paper aims to study the properties of RAC changes with the replacement rate and analyze the modification mechanism. Composite impregnation treatment was …

Influence of coarse aggregate size and content on the …

The binder, fine, and coarse aggregate mix ratios in the mixes were 1:1.54:2.4, where the binder consisted of OPC and 10% OPC replacement by silica fume. The eight concrete mixes were prepared and subdivided into two groups. Two control mixes were taken considering the two size ranges of coarse aggregate.

Mechanical performance of recycled aggregate concrete in …

RAC is processed from solid construction waste. Particles with particle sizes between 75 µm and 4.75 mm are called recycled fine aggregate, while those with particle sizes greater than 4.75 mm are called recycled coarse aggregate [31]pared with natural aggregate, RCCA is coated with a large amount of old mortar, which generally …

New approach in measuring water absorption of recycled aggregates

With the increase in the use of recycled aggregate concrete, the demand on recycled aggregate (RA) is escalating. As such, the behaviour and characteristics of RA need to be clearly understood. ... Strength of recycled concrete made from crushed concrete coarse aggregate. Concrete International: Design and Construction, 5 (1) …

Aggregates for Concrete as per American Standards – ASTM …

The aggregates are broadly classified into two types based on the size, namely- fine aggregate and coarse aggregate. In this article, we discuss the properties of the standard aggregates used in the production of concrete as per the American Standards (ASTM- …