May 07, 2021 Concrete waste (M 25 designation as per the design details) from a demolished building was analyzed in this study for its leaching and permeability properties to access its reusability. The concrete waste was crushed, graded into three samples (0-10 mm, 0-20 mm and 0.05-20) and then the samples were tested for permeability and leaching attributes

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The results for the aggregate characteristics showed that plain as well as reinforced demolished concrete debris can be crushed using existing plant to provide RCA of physical properties that

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the results are compared with conventional concrete. 4. Mix Proportions . Different mixes including one control mix were used to examine the influence of adding CD (Crushed demolished) coarse aggregates and CE (Crushed E-waste) fine aggregates on the properties of concrete. Details of

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demand of concrete which results in decrease of strength. ... -The RCA from demolished concrete consist of crushed stone aggregate with old mortar adhering to it, the water absorption ranges from 1.5% to 7.0%, which is relatively higher than that of the natural aggregates. Thus

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of crushed demolition concrete aggregates varying from 0% to 60% with an increment of 10% at their respective maximum dry density and OMC. Based on the CBR test results, it was observed that the CBR value first increased gradually and then decreased with the addition of crushed demolition concrete waste aggregates added

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demolished concrete. Specific gravity and water absorption The specific gravity of RCA was in the order of 2.19–2.48 which is lower as compared to NCA (2.58) since the RCA from demolished concrete consists of crushed stone aggregate with old mortar adhering to it. As per ECP 203-2008 [14] the water

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Sep 15, 2017 The research aimed at stabilizing lateritic soils, using crushed concrete aggregates from demolished buildings, foundations, roads and other structures, for use as sub-base for a paved road

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Carbon dioxide uptake in demolished and crushed concrete 7 1 Introduction 1.1 Objective Carbonation of concrete is an environmental process in time. When concrete structures are demolished and refined to Recycled Concrete Aggregates (RCA) the surface area is

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Concrete recycling is the use of rubble from demolished concrete structures. Recycling is cheaper and more ecological than trucking rubble to a landfill. Crushed rubble can be used for road gravel, revetments, retaining walls, landscaping gravel, or raw material for new concrete.Large pieces can be used as bricks or slabs, or incorporated with new concrete into structures, a material called

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The recycled aggregate used are taken from the demolished concrete members. Most of the concrete wastes are taken form waste concrete members. These concrete wastes are crushed and Recycled coarse aggregates (RCA) were produced. The use of recycled aggregates in concrete proves to be valuable building materials in technical, environment and

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the demolished concrete aggregate 10%, 20%, 30% by weight of the conventional coarse aggregate and the concrete cubes were casted by that demolished concrete aggregate then further tests conducted such as workability , compressive strength for that DAC and the result obtained are found to be comparable with the conventional concrete

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Ondo State for the study are demolished concrete aggregates and sandcrete blocks (see Plates 2.1a, b and c). Plates 2.1a shows the demolished sites and the area while 2.1b shows the demolished concrete structure piled up at the site where the demolished concrete rubbles were carefully collected and broken into small parts using ordinary hammer

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(The analysis of demolished crushed concrete aggregate (DCCA) concrete in regular mold cast is to be ready in (7, 14,28) days hydration and examination to be conduct lying on concrete. Such as

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Strength reduction of concrete produced from recycled coarse aggregate and natural fine aggregate ranges from 5 to 24%. This influenced by strength of crushed concrete, water to cement ratio of crushed and new concrete. For concrete produced from both recycled coarse and fine aggregate is between 15 to 40%. 2

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