recycled coarse aggregate concrete

Recycled Concrete Aggregates: A Review

Keywords: recycled concrete aggregate, water absorption, residual mortar, aggregate properties, concrete material properties, ... coarse agg regate from the original concrete that is created.

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, …

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 …

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 …

Bond Performance of Corroded Steel Reinforcement and Recycled Coarse …

Freeze–thaw cycles and steel reinforcement corrosion can damage the properties of concrete structures in a frigid marine environment. In this paper, experimental and analytical research on the freeze–thaw resistance of recycled coarse aggregate concrete (RAC) and the bond performance of corroded steel reinforcement and RAC …

Tensile Mechanical and Stress-Strain Behavior of Recycling

To effectively recycle waste petroleum products and construction waste, recycling polypropylene fiber (RPF) and recycled aggregate can be mixed into concrete to make RPF recycled coarse aggregate (RCA) concrete. In this study, the RPF recycled from a polypropylene (PP) packaging belt was used as the test material and manually …

An overview of study on recycled aggregate concrete in China …

Du et al. [6] reported that the micro-hardness of recycled coarse aggregate (RCA) was much higher than that of the interfacial transition zones (ITZs) in the RAC, and the micro-hardness of the interface between the RCA and the new mortar matrix was the lowest. Poon et al. [7] investigated the effect of microstructure of ITZ on the compressive …

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 …

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 …

Mechanical behaviour of seawater sea-sand recycled coarse aggregate

Among them, four monolithic specimens were cast with conventional natural aggregate concrete (NAC), seawater sea-sand concrete with natural coarse aggregate concrete (SSNAC), RAC and SSRAC. All the replacement ratios of seawater, sea-sand, and recycled coarse aggregates were .

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 …

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 …

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 …

Background of recycled concrete aggregate used in Japan

In Japan, recycled concrete aggregate (RCA) and recycled-aggregate concrete (RAC) are standardized in the Japanese Industrial Standards (JIS) A 5021–5023. The differences between the specifications in JIS and those in foreign countries are explained. In Japan, the durability of RAC under severe conditions, particularly freezing …

Recycled Concrete Aggregate

19.2.1 Recycled concrete aggregate (RCA). Coarse RCA complies to the requirements of maximum 5% masonry content, 5% fine materials, 0.5% lightweight material, 5% …

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 …

Mechanical properties of concrete with recycled coarse aggregate

In the Arabian Gulf region, waste concrete from demolished sites constitute the larger resource for recycled coarse aggregates and hence need to be studied. Studies on the properties of recycled aggregate concrete in the Arabian Gulf Region are limited [5], [9], [18], [19].

Influence of the amount of recycled coarse aggregate in concrete design

Recycled coarse aggregate (RCA) is the most common idea, but it does not gain wide acceptance among practitioners due the adhered mortar poses which deleterious effects on the concrete. However, a suitable concrete mix design enables the recycled aggregate concrete (RAC) to the achieve target strength and suitable for wide range of …

Use of recycled aggregate concrete in structural members: a …

Notable examples include studies on: recycled concrete aggregate properties with amounts of old adhered mortars (Duan and Poon Citation 2014), the …

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 …

Recycling of Concrete (Recycling Coarse Aggregate)

introduction of recycled concrete aggregate with its uses and properties. Various test results on Recycled concrete aggregate also described. It also consist the difference between RCA and natural aggregate. The future recommendations are also discussed in addition. Keywords—Recycled Coarse Aggregate (RCA), Concrete Mix

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

Different recycled coarse aggregate substitution ratio on the strength of concrete. ... Extensive research has been conducted on the utilization of RCAs in the production of high-performance recycled aggregate concrete (RAC), which can effectively reduce CO 2 emissions by up to 48.7% [3].

Use of recycled coarse aggregate for M40 grade concrete

Decreasing natural resources of coarse & fine aggregates and growing issues with trash management assistance the beneficiation of trash materials. The quality and uniformity of the recycled aggregate and the concrete generated from it are clearly influenced by the degree of processing and the original concrete's quality, according to …

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 …

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 ...

Crushed Concrete Aggregates – Properties and Uses of Recycled …

Modulus of elasticity of concrete made with recycled coarse and fine aggregate is lower than that of concrete made with recycled coarse aggregate only. 5. Creep Creep of concrete produced from recycled concrete aggregate is higher than concrete made using natural aggregate by 30 to 60%. 6. Drying Shrinkage

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 …

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 …

Static size effect of recycled coarse aggregate concrete: …

Plain Portland cement P.O 42.5R is used in the test, which meets the Chinese standard for common Portland cement (GB175-2007), and its mineral components are presented in Table 2.Natural river sand with a nominal maximum size of 4.75 mm is used as the fine aggregate, which has an apparent density of 2590 kg/m 3 and a …

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, …