· Throughout the experiment, a control mixture containing 708 kg/m 3 of coarse aggregate, 813 kg/m 3 of fine aggregate, and 550 kg/m 3 of the binder with a water/binder ratio (w/b) of 0.38 was utilized
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· Based on the technical potential of water jets, a novel crushing method using water-jet technology is proposed in this study for high-value waste concrete recycling. A water jet was used to break or fragment waste concrete. The liberation behavior of coarse aggregates (nearly free of RAM) subjected to water jet impact (WJI) was investigated
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aggregate concrete is in close proximity to normal concrete in terms of fl. xural strength. The slump of recycled aggregate concrete is more than the normal concrete. At the e. d, it can be said that the RCA up to 50 % can be used for obtaining good quality concrete.Dr. J. Venkateswara Rao, et.al (2018) studied an experiment on the effective
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· In order to study the mechanical properties of concrete prepare d with crushed bricks completely. replacing crushed stones, five groups of experiments with diffe rent water-cement ratios were
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· The interfacial transition zone hardness at the aggregate-mortar interface is 53.94, 34.21, and 44.08 % of bulk concrete for control concrete, recycled coarse aggregate-1 concrete, and recycled
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Similarly samples with recycled coarse aggregate were also prepared and strength of natural coarse aggregate with recycled coarse aggregate was compared. In second stage, some samples of concrete were prepared with different percentage of natural aggregate and recycle aggregate in order to attain the optimum percentage of recycled aggregate, at
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· The construction and demolition waste from the construction industry contributes significantly to the sustainability of the built environment. Massive amounts of material waste from concrete construction must be managed effectively. The utilization of concrete waste into recycled coarse aggregate (RCA) may preserve natural coarse
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· This investigational study aims to examine the influence of using recycled coarse aggregate (RCA) instead of natural coarse aggregate (NCA) on the fresh properties (workability) and
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· Purpose The purpose of the present study is to compare the environmental impacts of using coarse natural aggregate (NA) and coarse recycled concrete aggregate (RCA) to produce concrete in the New York City area, by means of a unique LCA framework that incorporates comprehensive regional data. Methods A comparative environmental
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· An experimental flow is given in Fig. 1.Concrete waste was directly collected from construction waste for primary crushing procedure, in which a jaw crusher was employed and recycled coarse aggregate contains 30–40% hardened old mortar was obtained, which is
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· For making recycled coarse aggregate, concrete from a nearby site was used in a testing machine and then by hand with hammers. The broken aggregates are then put through 20 mm, 16 mm, 10 mm, and 4.75 mm sieves, and the aggregates that stay in the 16 mm, 10 mm, and 4.75 mm sieves are used as recycled coarse aggregates that
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· Recycled coarse aggregates (RCAs) are widely used as a sustainable material in the construction sector. However, the variability of the material is the main factor that limits its use in practice.
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· CNAs – coarse natural aggregates; CRCAs – coarse recycled concrete aggregates. Furthermore, it is significant that 31.30 % of the total cost incurred in the production of CNAs, are environmental associated costs comprising landfill charge, other air emissions cost, water emission cost, CO 2 cost, and disamenity related cost ( Fig. 5 ).
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· Additionally, natural sand with a particle size of 4.75 mm down is utilized as a fine aggregate, in accordance with the guidelines stated in IS 383–2016 (Reaffirmed 2021) [40].For the natural coarse aggregates, which also adhere to IS 383–2016 (Reaffirmed 2021) [40], mixed proportions of crushed stone aggregates ranging from
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· The concept of repeated recycling of concrete is as follows: recycled coarse and fine aggregates obtained by crushing concrete The RAC2 was crushed with a jaw crusher to produce RFA2 (<4.75 mm) and RCA2 (4.75–19 mm). The RFA2 was milled to
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· the low quality recycled coarse aggregate, pulverize and collect dust, prepare high-quality recycled coarse aggregate and recycled micro powder for recycled concrete, and effectively reduce dust emission. After jaw crusher crushing screening, a 5–25 mm simple
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· The resistance to mechanical actions such as impact, crushing and abrasion for the recycled concrete aggregates is also lower. The effects of using recycled concrete aggregates instead of natural
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· This paper examines the performance of geopolymer concrete containing coarse and fine recycled concrete aggregates (RCA) in terms of strength and durability properties. The durability properties were accessed in terms of capillary suction, initial surface absorption and acid attack. The strength was evaluated in terms of compressive
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· Natural coarse aggregates were crushed granite supplied from a local quarry whilst RCA were supplied by a local C&D recycling plant based in Perth (Capital Recycling). The grading size for recycled coarse aggregates was 10 mm, 14 mm, and 20 mm but 14 mm was not used as it has been reported in literature that the RCAs with size
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· Three different generations (1st, 2nd and 3rd) of repeated recycled concrete were produced using 100% recycled coarse aggregate (RCA) as a replacement of natural coarse aggregate where RCA was recycled 3
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· The aim of this paper is to evaluate the influence of the crushing process used to obtain recycled concrete aggregates on the performance of concrete made with those aggregates. Two crushing methods were considered: primary crushing, using a jaw crusher, and primary plus secondary crushing (PSC), using a jaw crusher followed by a
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Recycled Concrete Aggregate (RCA)-YouTube 27.07.2017 · WORLDS BEST TREE FELLING TUTORIAL! Way more information than you ever wanted on how to fell a tree! recycled coarse crusher-skolka-kubicek.cz recycled coarse crusher. ACA coarse
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· The main objective of this research is to investigate experimentally the effect of crushed and uncrushed coarse aggregate on the properties of hardened concrete (compressive strength) by adopting the American Concrete Institute (ACI) and the British Department of Environment (DoE) methods. Concrete mixes were designed, concrete
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· Recycled Coarse Aggregate (RCA) The RA was sourced from a wrecked residential structure in Chennai's West Mambalam. The aggregate obtained had a specific gravity value of 2.78 and was crushed to the necessary particle size of 10–20 mm. RA is created by crushing and sorting construction waste, such as concrete, brick, and asphalt,
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High: >40002 · The mixing ratio of recycled coarse aggregate compared to the total coarse aggregate amount (recycled coarse aggregate: crushed coarse aggregate ratio) was
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· In order to improve the utilization efficiency of waste concrete in cold regions, this paper studied the properties of parent concrete (PC) and its recycled coarse aggregate (RCA) based on ordinary Portland cement (OPC), fly ash (FA), silica fume (SF), and ground granulated blast-furnace slag (GGBS) combination optimization in freeze
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· Replacing 11.7% of the recycled coarse aggregate with natural sand and adding date palm leaves fibers in an amount equivalent to 0.64% volumetric content to such concrete helped increase the compressive strength by 16.2% and tensile strength by 3.2% above the corresponding strengths of the control mix.
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: Huai-Ying Fang, Fu-Lin Liu, Jian-Hong Yang · Crushed precast elements from concrete of good quality used as Recycled Coarse Aggregate possibly are beneficial for environment and concrete
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· This study presents a liberation process for recycling high-quality coarse aggregates from waste concrete by impacting with steel grits. Considering the mortar liberation ratio and specific energy for the liberation process as well as the water absorption and apparent density of the recycled coarse aggregates (RCA), the effects of impact
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· This paper discusses the properties of RCA, the effects of RCA use on concrete material properties, and the large scale impact of RCA on structural members. The review study yielded the following findings in regards to concrete material properties: (1) replacing NA in concrete with RCA decreases the compressive strength, but yields
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