Fracture process zone characteristics and
Normal and recycled aggregate concrete differ significantly in their fracture characteristics. The cracking in recycled concrete initiates earlier; the fracture length is generally larger and the use of high proportion of recycled aggregate results in higher strain gradients in the fracture process zone.
Characteristics of waste concrete powders from multi-recycled …
This study investigated the physical and chemical characteristics of recycled concrete powders (RCP) generated by repeated recycling of concrete and discussed their application as a partial replacement for cement in mortar. RCPs smaller than 0.15 mm were obtained from three different generations of multi-recycled coarse …
Recycled Concrete Aggregates: A Review | International …
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 characterization of fiber-reinforced rubberized recycled …
Different physical and mechanical properties of rubberized recycled concrete (R 2 C) and fiber-reinforced rubberized recycled concrete (FR 2 C) were investigated. Microstructural analysis, chemical analysis, failure modes, and cost-effectiveness were also evaluated.
Leaching characteristics of metals from recycled concrete …
Recycled concrete aggregates (RCA) and reclaimed asphalt pavements (RAP) are two construction waste products that are commonly used in the road construction industry. Besides many advantages, pollutants leaching from RCA and RAP are highlighted as the most concerning environmental issue. This study investigated metals leaching …
Thermal and mechanical characteristics of recycled concrete …
The growing rate of plastic waste generation is becoming a global concern due to the adverse impacts of plastics on the environment. Recycling and reusing plastic waste has been identified as a sustainable approach to mitigate the environmental concerns associated with landfilling of plastics. This study aims to evaluate the effect of the …
Early age performance and mechanical characteristics of recycled …
The use of shredded recycled PET fibres in concrete has been shown to lead to interesting improvements in performance for various fibre concrete characteristics and offers a potential alternative for this material.
Intrinsic damage characteristics for recycled crumb rubber concrete
To explain the intrinsic damage characteristics of recycled crumb rubber concrete (RCRC) under uniaxial pressure, in which fine aggregates are substituted for rubber aggregates in different contents from 10% to 30% of volume ratio, we apply cohesive zone model (CZM) in numerical simulation. The paper presents a numerical approach …
Relationships between recycled concrete aggregates characteristics …
This research aims to analyze the quality and suitability of recycled concrete aggregates (RCA) produced by crushing concrete blocks provided from bui…
(PDF) Study on pore characteristics of recycled aggregate concrete …
In order to examine the effect of high temperatures on the microstructural characteristics and residual mechanical properties of recycled aggregate concrete mixed with glazed hollow beads (RATIC ...
On statistical characteristics of the compressive strength of recycled
— Demolished concrete can be used as recycled concrete aggregate (RCA) for construction purposes. In the research, the compressive strength of concrete made from recycled coarse aggregates and natural coarse aggregates was compared.
Effects of fine aggregate content on the unsaturated …
Recycled concrete aggregate (RCA) can be used in landfill and slope cover systems, where its unsaturated hydraulic properties play an important role. The hydraulic behavior of RCAs can be potentially controlled through mixing coarse and fine aggregates by a pre-determined proportion, which lacks experimental validation. In this study, water …
Sustainable building materials-recycled aggregate and concrete…
Resource utilization of construction and demolition (C&D) waste has great potential to significantly reduce the consumption of natural resources and improve the environment. Meanwhile, establishing a sound policy system and reducing production are the key ways to solve the problem of C&D waste. Numerous studies on C&D waste, …
Influence of supplementary cementitious materials on ITZ
The poor performance of recycled aggregate concrete (RAC) limits its application on wide filed. This paper attempted to study the influence of fly ash…
Microscopic characteristics of interface transition zones of …
The understanding of microscopic characteristics of interface transition zones (ITZs) between recycled concrete aggregates (RCAs) and asphalt mastic contributes to the treatment strategy of RCAs and the optimum design of hot mix asphalt.
Recycled Concrete Aggregate
Recycled aggregate concrete (RAC) is a new type of concrete produced using crushed, screened, and washed recycled aggregate obtained from waste concrete to replace …
A comprehensive review on the use of recycled concrete …
A comprehensive review on the use of recycled concrete aggregate for pavement construction: Properties, performance, and sustainability. ... This relationship demonstrated the characteristics of RCA concrete compared to concrete made with NA for the performance of highway pavement (McNeil and Kang, 2013).
Liquefaction characteristics of recycled concrete aggregates
Recycled concrete aggregate (RCA) has great potential use in pavement. However, unclear characteristics of RCA and its relationship with the properties of asphalt mixture hinder severely its promotion.
Effects of the recycled coarse aggregate mixing ratio on the …
In this study, the characteristics of recycled aggregate concrete according to the mixing ratio of recycled coarse aggregate(RCA) were analyzed for different design strengths to explore the use of recycled materials in the production of ready-mixed concrete. The results show that, depending on the ratio of recycled aggregate, the …
Effects of fine aggregate content on the unsaturated …
Test results indicate that the difference between the characteristics of fresh and hardened recycled aggregate concrete and natural aggregate concrete is perhaps relatively narrower than reported ...
Recycled Coarse Aggregates in Concrete: A Comprehensive …
Results indicate a nuanced relationship between RCA replacement levels and concrete strength, with the optimal mixture at 25% RCA replacement (RCA 25) …
Influence of Treatment Methods on the Strength and …
Six series of concrete mixtures are prepared using natural aggregate, recycled aggregate, recycled aggregate treated with HCl and H 2 SO 4, recycled aggregate obtained after scrubbing treatment, and heating and scrubbing treatment. The physical and mechanical properties of these aggregates, and their strength and performance of recycled ...
Use of Nano-Silica as a Supplementary Cementitious Material in Recycled
In order to solve this problem, this paper adopts ns as a supplementary cementitious material to participate in the soil system of recycled concrete, this convenient method is not only easier to apply with the project, and greatly improves the performance of recycled concrete, which makes it possible to greatly increase the amount of recycled ...
Strength and Deformation Characteristics of Recycled Concrete Aggregate
A series of consolidated drained triaxial compression tests were performed on recycled concrete aggregates to investigate the feasibility of their use as a backfill material for geotechnical engineering structures requiring a high stability while allowing a limited amount of deformation, such as embankments and conventional type and geosynthetic …
Effect of biomineralization technique on the strength and …
These microstructure characteristics discussed above have also been observed earlier [18], [19], [27], [49]. ... The role of 0–2mm fine recycled concrete aggregate on the compressive and splitting tensile strengths of recycled concrete aggregate concrete. Mater. Des., 64 ...
Study on pore characteristics of recycled aggregate concrete …
As shown in Fig. 7, the 2-D fractal dimension of the recycled aggregate thermal insulation concrete specimens at different temperatures correlated linearly and positively with its porosity, indicating that the fractal dimension could characterize the pore structure characteristics of the recycled aggregate thermal insulation concrete ...
Impact of aging on leaching characteristics of recycled concrete
The focus of this study was to evaluate the effects of stockpiling (aging) on leaching of elements in recycled concrete aggregate (RCA) that may contribute to tufaceous constituent formation. Speciation and leaching controlling mechanisms of these elements were identified via geochemical modeling. The effects of stockpiling were …
Experimental and Analytical Investigation of Fracture Characteristics …
The results indicated that the steel fiber-reinforced concrete made with recycled aggregate showed similar performance and fracture characteristics compared to normal concrete. Thus, adding steel fibers to various concrete mixes considerably improved the fracture characteristics, while the brittleness was reduced with increased …
Recycled Concrete: Uses, Advantages and Limitations
Recycled concrete means that you crush or pulverize the demolished concrete structure or structural elements and reuse the crushed concrete for future …
Strength and durability of concrete containing recycled …
Recycled concrete aggregates (RCA) sourced from waste concrete are a sustainable alternative to natural crushed stone aggregates. The strength and durability …