The suitability of recycled plastics as coarse aggregate in concrete and its advantages are discussed here. The initial questions arising of the bond strength and the heat of hydration regarding plastic aggregate were solved. Tests were conducted to determine the properties of plastic aggregate such as density, specific gravity and aggregate ...
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Coarse aggregate crushing waste (CACW) dust appears to be one of the potential waste products for substituting cement in many engineering projects [9,10]. It is an environmentally benign and cost-effective material [ 11, 12 ].
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There are many crushing methodologies used to crush concrete waste to different particles sizes, producing two types of aggregate; fine aggregate (under 4 mm in diameter) and coarse aggregate ...
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to fully consider the ductility of the material distribution damage stage and to avoid the size effect of the local damage stage. Yun [9] et al. used glass waste as coarse particles in ... the effects of the surface morphology and the crushing value of the solid waste coarse aggregate on the compressive strength, splitting tensile strength ...
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Large quantities of coarse solid wastes are generated during mining and quarrying both marble and granite rocks in Saudi Arabia and Egypt. These large quantities are major environmental concern in the surrounding area of quarry site. However, due to the similarity of these wastes to conventional aggregates, they could be potential source of …
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Once other materials have been selectively dismantled, the End-of-Life (EoL) concrete is torn down with the help of machinery. The crushing processing of EoL concrete has already been described elsewhere in the literature (Nagataki, Gokce, Saeki, and Hisada, 2004; Kahn et al., 2018). As a common practice, combinations of jaw and impact …
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Material properties. Recycled aggregates were collected from a local waste concrete recycling company located in the Daegu-Kyungpook area in Korea. Their sizes are variable depending on the production process and their potential usage. When the aggregate is small (10–20 mm), it consists predominantly of either mortar or crushed …
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Overview of Concrete Crushers. Concrete crushers are purpose-built machines designed to break down concrete into smaller, manageable pieces. They act as a pivotal solution in recycling concrete debris from demolition sites or construction projects, turning it into valuable materials for reuse. These crushers come in various sizes and …
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There are many crushing methodologies used to crush concrete waste to different particles sizes, producing two types of aggregate; fine aggregate (under 4 mm in diameter) and coarse...
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2.1. Physicochemical and Mechanical Properties of Different Solid Waste Coarse Aggregates. Firstly, the raw solid waste was prepared into different sizes of single-graded coarse aggregate by jaw crushing → screening, and other preparation processes, and then graded according to "Recycled Coarse Aggregate for Concrete" (GB/T25177-2010) and, …
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The feasibility studies related to the use of recycled e-waste & plastics as coarse aggregate in concrete studied and the tests were conducted to determine the properties of plastic and e-waste as a coarse aggregate (2.5, 5, 7.5 and 10%) density, specific gravity, water absorption, compressive strength and tensile of the different …
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Using waste materials for new products is a global trend undergoing rapid development. Recycling materials allows for a more efficient life cycle and contributes to environmental protection. ... In this paper, some characteristics of recycled coarse aggregates obtained by crushing waste ready-mix concrete, as well as the mechanical and ...
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To date, many studies have shown that, RCA totally differs from natural coarse aggregate (NCA) in physical properties, such as high porosity [21], high water absorption [22], low apparent density [23], large crushing value [24], and complex interface transition zone [25], which lead to poor workability, mechanical properties and durability …
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In this study, ground glass powder and crushed waste glass were used to replace coarse and fine aggregates. Within the scope of the study, fine aggregate (FA) and coarse …
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that of coarse aggregate made through crushing. Ceramic aggregate is usually non-porous, irregularly shaped, and angular. However, porous aggregate can be ... Fig. 1. Ceramic waste materials ...
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by reusing coarse aggregate crushing waste (CACW). The process used to accomplish this goal is divided into four stages: (i) material collection and characterization; (ii) laboratory
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waste materials attracts new Technology, Social values, costs and employment. It also helps to reduce the dependency on materials and importation of foreign materials. ... Aggregate Crushing Value test helps to determine the aggregate crushing value of coarse aggregates according to BS 812, Part 110:1990. These values are shown in table ...
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The coarse aggregate grade was between 4 mm and 10 mm in diameter for the granules. The waste materials replacing sand (see Section 2.1) are readily available without the need for further processing, with a particle size of less than 4 mm. A constant water-to-cement ratio of 0.45 was used in all concrete mixes.
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The utilization of the fines fraction produced during the crushing of waste concrete is still unresolved. This fraction represents up to 50% of the mass of waste concrete (Chen et al., 2019). It is a significant amount of waste that is generally considered a secondary leftover after the production of coarse recycled aggregate.
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Coarse Aggregate Crushing Waste (CACW) is a waste product that results from the primary crushing of aggregates. Massive amounts of CACW are produced in …
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In this study, the test material was construction and demolition waste from a site in Hangzhou City, China. The CDW consisted of demolished concrete components and walls from a 30-year old building. The tested material was directly obtained from the waste plant after preliminary crushing, and the particle size of the CDW ranged from 9.5 to …
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Concrete is a crucial material in the construction industry, but many countries face scarcity in natural resources. To address this issue, recycling materials is important, and recycled aggregate concrete (RAC) has gained global attention for its environmental benefits [].RAC is made from recycled concrete aggregate (RA), which …
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Conventionally, CRT funnel glass waste are prepared as aggregates through the process of crushing and grading into sizes of less than 4.75 mm which were later discovered to have cause the Pb leaching rate to exceed the allowable limit of 5 mg/L, ranging from values of 14.25–34.28 mg/L [10, 11]. Fortunately, the risk of Pb leaching …
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Crushing equipment is used to reduce the size of hard waste materials so that they can be easily recycled. They can also be used to distinguish between pieces of various compositions. Screening is typically used to separate coarse materials at the end of the process. It's the last step in the process of separating different-sized materials.
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Brochures. Primarily to process crushed stone and gravel that generally ranges from 3/8" to 4" (9.5mm to 101mm), McLanahan Coarse Material Screw Washers provide scrubbing, scouring and agitation of materials to remove tough clays. They feature abrasion-resistant, white iron paddles used in conjunction with screw flights that provide maximum ...
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APPLICATIONS. Coarse material washers are used to remove a limited amount of dirty material from a coarse aggregate. This material includes very water soluble slimes, silts, soft clay, and organic particles. They are often used as a final wash following a wet screen and are designed to scrub and clean gravel and crushed stone up to 75mm (3 ...
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Simple and cost-effective coating techniques are used to overcome this hurdle, such as treating the coarse aggregate with alccofine-1203 (AF), a micro-fine …
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The crushing value of the solid waste coarse aggregate affected the splitting tensile strength, flexural strength, and modulus of elasticity of the concrete to a greater extent than the compressive …
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Impact crushing of waste concrete for coarse aggregate liberation by water jet | Semantic Scholar. DOI: 10.1016/j.powtec.2024.119513. Corpus ID: 267540499. …
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Using recycled asphalt pavement (RAP) materials in the pavement industry is a hot issue now, which can reduce carbon emissions significantly. The agglomeration and variability of the RAP materials treated by a conventional crushing and screening process present a challenge for the gradation design and variability control of the reclaimed asphalt …
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