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28/10/2022· The influence of recycled fine aggregate content on the properties of soft soil solidified by industrial waste residue was systematically studied. First, the addition of recycled fine aggregate may provide skeleton support, which was conducive to improving the solidification properties. Comparing the addition of recycled fine aggregate content …
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An existing mix design (RBA-3DPC), in which 64% of the natural aggregate in a 3D printable concrete (3DPC) had been replaced with recycled brick aggregate, is adjusted by adding phase change material to the pores of the recycled brick aggregate by vacuum impregnation, creating PCM-3DPC. Rheological characterisation tests are performed on ...
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26/09/2021· Wang et al. [ 3] found that the compressive strength of recycled fine aggregate concrete (RFAC) containing RFA1 at 28 days was greater than the ordinary concrete. Kirthika et al. [ 4] systematically studied the durability of RFAC with RFA1 and results showed that concrete with 30% RFA1 had better resistance to chloride …
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02/12/2019· Previous studies revealed that for a normal strength range, the compressive strength of RCA concrete decreased by approximately 15–30% from that of natural aggregate (NA) concrete as the RCA replacement ratio increased to (Folino and Xargay 2014; McNeil and Kang 2013 ).
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Credit 4 (Materials and Resources) states, "specify a minimum of 25 percent of building materials that contain in aggregate a minimum weighted average of 20 percent post-consumer recycled content material, OR, a minimum weighted average of 40 percent post-industrial recycled content material."
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The replacement proportions of RFAs considered for this study are 0%, 10%, 20%, 30%, 40%, and 50% to the weight of manufactured sand. Strength optimization was carried out by Taguchi optimization method using Minitab software tool. The parameters considered in this study are the replacement proportion of RFA, type of cement and type of curing.
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Advantages of Recycled Concrete Aggregate It minimizes the amount of CO2 in the atmosphere because a big amount of carbon dioxide is absorbed while crushing into smaller particles. It expands the recycling industry's employment options. According to a few research findings, using Recycled Aggregate Concrete reduces building costs.
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18/08/2020· The strength reduction of concrete produced from recycled coarse aggregate and natural fine aggregate ranges from 5% – 24%. This influenced by the strength of crushed concrete, water to cement ration of crushed and new concrete. For concrete produced from both recycled coarse and fine aggregate is between 15% – 40%. …
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In this study, five series of parental concrete mixtures using natural coarse and fine aggregates were prepared, which had the same target slump value from 35mm to 50mm and different compressive strengths ranging from 25MPa to 60 MPa. These concretes were used as recycled aggregates to prepare RACs with a compressive target strength of …
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Abstract This study addresses the effects of accelerated hydration in recycled aggregate concrete (RAC) due to the incorporation of High Early Strength Cement (HESC) and employing the steam curing method. The RAC was formulated by the complete replacement of natural aggregates with recycled aggregates.
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recycled fine aggregate (RFA) as a fine aggregates it will be environmental friendly and also solution for the demand of fine aggregate. Replacement of fine aggregate by recycled fine aggregate up to but by increasing the percentage of RFA in concrete it will affect the strength of concrete due to its
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08/08/2020· In this context, use of recycled fine aggregate (RFA) from construction and demolition (C&D) waste can be considered as an effective elucidation. Conventional mix proportioning of RFA in concrete can not be used. To address this issue, a novel mix-proportioning method is developed using particle packing density and minimum paste …
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10/11/2021· The average cylindrical compressive strength of concrete having 0% (RAC-0), 30% (RAC-30), 50% (RAC-50) and (RAC-100) recycled coarse aggregates was determined according to ASTM C39 (2020) as shown in Table 4. Mechanical properties of the longitudinal and transverse steel bars used for reinforcing columns, are mentioned in …
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01/04/2021· Many researchers had proved that the strength of the recycled aggregate concretes (RAC) is similar to that of conventional concretes. The main aim of this review is to study the concrete strength prepared with the reused coarse aggregate concrete relating to the bond strength, compressive strength and tensile strength by replacement level …
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Abstract: In this study, recycled glass is used to replace the natural fine aggregate in different mix proportions to obtain the optimum combination that will produce the highest strength. The control samples are Grade 30 ordinary Portland cement concrete (OPCC) containing natural sand and coarse aggregate.
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30/01/2013· The use of recycled aggregate generally increases the drying shrinkage creep & porosity to water & decreases the compression strength of concrete compared to that of natural aggregate concrete. It is nearly 10-30% as per replacement of aggregate.
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17/10/2019· This paper presents an experimental study done on the structural behaviour of recycled aggregate concrete (RAC) beam specimens. Longitudinally reinforced beams with and without transverse reinforcement were tested under two-point bending, at four replacement levels of recycled aggregates (30%, 50%, 70% and ).
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Research has been carried out on recycled aggregates from the exclusive crushing of structural concrete waste (CDWRCon) and mixed ceramic materials (CDWRCer) in selective demolitions. This study analyses the use of these recycled aggregates as wet mix macadam (GARCon, GARCer) and in cement soil (CSRCon, CSRCer). The materials …
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10/03/2013· The result shows the compressive strength of RAC is on average 87% of the NAC and the Slump of RAC is low and that can be improved by using Saturated Surface Dry (SSD) of RCA. Based on the obtained results they derived the conclusion that concrete can b successfully produced using RCA that have been produced from demolition and …
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The results indicated effectiveness of demolition waste as coarse aggregate by partial replacement of conventional concrete by 15%, 30%, 45% and 60% without affecting the design strength. This paper recommends that the demolition waste can be used as an alternative construction material to coarse aggregate in concrete. Download Free PDF …
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When recycled aggregate absorption is low (under 5%), pre-soaking or adding extra water to avoid loss in workability will negatively affect concrete strength (due to the bleeding effect), whereas with high water absorption this does not occur and both of the aforementioned correcting methods can be accurately employed. KEYWORDS:
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