Durability of Recycled Concrete Aggregates Prepared with
The effects of various acid concentrations (0.1, 0.5, and 0.8 mol of HCl) and treatment times on the characteristics of aggregate and concrete were evaluated by Guneyisi et al. . They discovered that the time spent immersed in an acid bath had no discernible effect on the quantity of mortar removed and that the application of a low ...
Recycling of incineration sewage sludge ash as SCM and aggregate
The recycling of ISSA as SCM and aggregate presents a promising avenue toward sustainable waste management and resource utilization. The incorporation of ISSA as an SCM in cementitious blends not only mitigates the environmental impact of its disposal but also harnesses its pozzolanic reactivity to improve the mechanical strength, durability ...
Strength and Durability Evaluation of Recycled Aggregate …
Aggregate strength, gradation, absorption, specific gravity, shape and texture are some of the physical and mechanical characteristics that contribute to the strength …
Rate-dependent mechanical properties and acoustic …
Herein, we investigate the effect of loading rate on the flexural and fracture behaviors of recycled aggregate concrete, along with associated acoustic emission …
Study on the Adhesion Characteristics of Asphalt-Aggregate …
The adhesion characteristics of the asphalt-aggregate interface in different cold recycled asphalt mixtures have been comprehensively investigated based on the atomic force microscopic (AFM).
Effect of oyster shell as an aggregate replacement on the
The aim of this study is to provide basic experimental data to help prevent environmental pollution and to pursue resource recycling by examining the use of waste oyster shells (OS) as concrete aggregate. The possibilities of manufacturing the waste into lightweight concrete and hollow concrete blocks are also examined. The physicochemical characteristics of OS are analysed …
Exploring the physical and mechanical characteristics of multi
With the aim of investigating the application of circular economy principles to aggregate, in this paper we consider the concept of multigeneration recycled aggregate …
Review Modification of recycled aggregate and conservation …
A researcher evaluated the LCA method in conjunction with the case of Hong Kong, China, and found that RA produced by CDW reduces greenhouse gas emissions by 65% and saves 58% of non-renewable energy consumption compared to natural coarse aggregate [226]. However, characteristics such as the autogenous high porosity of RA result in an ...
Examining the Influence of Recycled Aggregates on the …
The recycling of CDW has become a prominent issue and the main objective of waste management policies. This has led to a greater emphasis on reusing, ... An evaluation of the recycled aggregate characteristics and the recycled aggregate concrete mechanical …
Full article: Performance of recycled aggregate …
Research findings demonstrate that recycling CDW leads to significant reductions in emissions, energy use, global warming potential (GWP), and conserves landfill space when compared to waste disposal in landfills. …
Durability of Recycled Concrete Aggregates Prepared with
Recycled concrete aggregates (RCAs) have low quality when compared with natural or conventional aggregates as the paste adhering to it is the key aspect that affects its functionality. Since the adhering cementitious paste weakens the adhesion between the aggregate and the binder, it becomes a decisive factor in the mechanical behavior of the …
A study on the strength and durability characteristics of …
Hanumesh et al., 2018 utilized PPFs in RAC and noticed increases in shear strength and mechanical characteristics with 25% recycled aggregate . The authors ... Similarly, coarse recycling aggregate will help save the natural reserves of limestone and other mineral resources used as aggregates and help preserve the environment. 5.
Aggregates in Concrete: Types, Functions, and Importance
Important Characteristics of Aggregate in Concrete . A well-graded aggregate should typically be within the size range of 1/8 to 2 inches; however, most guidelines suggest sizing coarse aggregates between 3/8 inch and 1.5 inches (9.5 mm to 37.5 mm) based on project requirements. ... Recycling aggregates used in concrete can improve ...
Effect of pore structure and morphological characteristics of …
To boost the recycling rate of demolished clay bricks, recycled fine aggregates from clay bricks (RFCBs) can be feasibly used as sand substitute for preparing green concrete. In this study, the influence of pore structure and morphology characteristics of RFCBs on the mechanical and microstructural properties of concrete was explored.
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 compressive strength is similar to that …
Utilization of all components of waste concrete: Recycled aggregate …
The research results are helpful to further clarify the basic characteristics and performance of recycling of each component of waste concrete, aiming to promote the application of the whole component of waste concrete in practical projects, and thus play an effective role in waste consumption and environmental protection.
Durability of Recycled Concrete Aggregates Prepared with
Recycled concrete aggregates (RCAs) have low quality when compared with natural or conventional aggregates as the paste adhering to it is the key aspect that affects its …
Characteristics of recycled aggregate | Download Scientific …
Download scientific diagram | Characteristics of recycled aggregate from publication: Mechanical characteristics of self-compacting concrete made with coarse aggregate obtained from concrete ...
Failure behaviour and damage evolution of multi-recycled aggregate …
In this paper, the stress–strain behaviour, mechanical properties, characteristic stress, and damage evolution of multi-recycled aggregate concrete (Multi-RAC up to 3 recycling cycles) under triaxial compression were investigated, considering the effects of confining pressure and number of recycling cycles.
Study on fracture characteristics of recycled aggregates …
Recycled aggregate (RA) is a product of construction and demolition wastes, and RA particle presents low strength and adhesion with asphalt mortar compared with natural aggregate. With the aim of studying fracture characteristics of recycled aggregate asphalt concrete (RAAC), the influence of RA on interfacial zone failure should be evaluated.
Properties of aggregates- Physical properties, Chemical …
The surface texture of an aggregate is a measure of degree up to which the surface of the particle of aggregate is polished or dull, smooth or rough. The surface texture of a crushed aggregate depends on the grain size, hardness, pore characteristics of the parent source rock. This can be determined through visual inspection.
Effect of Brick Aggregate Content on Performance of …
In road engineering, road construction requires a large amount of natural aggregate; its substitution with recycled construction-solid-waste aggregate not only saves resources but also reduces the burden on the environment. The main components of construction solid waste are concrete blocks and brick slag; the breakability of the latter can affect the …
Preparation and characteristics of cold-bonded lightweight …
Preparation and characteristics of cold-bonded lightweight aggregates by recycling mine tailings and industrial waste residues based-binder. ... of this study are to investigate the physical and mechanical characteristics of cold-bonded tailings lightweight aggregate (CBTLWAs) prepared by recycling MTs and IWRs based-binder. Through applying ...
Microscopic characteristics of interface transition zones of …
The ITZs-A-R is 25 μm thick after examining the lateral change of characteristics around the aggregate. ITZs-A-R has an average modulus of 24.01 GPa, which is 1.3–1.5 times that of residual mortar. ... Development of recycling technology from waste aggregate and dust from waste concrete. J. Ceram. Process. Res., 8 (1) (2007), pp. 82-86. View ...
Pore characteristics of recycled aggregate concrete and its
1. Introduction. Recycled aggregate is prepared with waste concrete by crushing, screening, and removing impurities. Using waste concrete to produce recycled aggregate concrete can reduce the consumption of natural aggregate and promote the effective consumption of construction waste [1].However, because old mortars are attached to recycled …
Creep and drying shrinkage characteristics of concrete produced …
The writers have postulated that the lower elastic modulus and higher creep and shrinkage properties of RCA-concrete, as reported by some researchers, are due to the difference in the proportions of the ingredients of RCA-concretes vis-à-vis their companion NA-concretes rather than the properties of RCA per se [17].The RCA-concretes in these studies were …
Strength characteristics of recycled asphalt pavement aggregate …
Preliminary experiments were conducted to ascertain the strength characteristics of geopolymer concrete by partially replacing Natural Coarse Aggregate (NCA) with RAP. ... RAP is a sustainable material used in various industries to develop their infrastructure by recycling and reusing it. RAP that is utilised as coarse aggregate in geopolymer ...
Characteristics of high-performance steel fiber reinforced …
Reusing and recycling discarded concrete is suitable and important from an eco-friendliness point of view and efficient consumption of natural resources [4], [5], ... sieved after crushing to attain the same particle size distribution curve and maximum aggregate size as natural coarse aggregate. The physical characteristics of fine, ...
Characteristics of waste concrete powders from multi …
However, as it has been pointed out that studies on concrete recycling are mainly focused on coarse aggregate [13], research on repeated recycling of concrete has also largely concentrated on the effects of recycled coarse aggregate, with fewer studies examining the impacts of recycled fine aggregate. Recycled concrete powder (RCP), the finest ...