Comparative analysis on costs and benefits of producing
It was reported that the long-term net benefit of producing coarse recycled concrete aggregate (CRCA) from waste concrete was positive with a value of US$ 22,334,116 per year, while that of crushed coarse natural aggregate (CNA) was a According to the Chinese construction market price, the cost of 650 kg of recycled coarse aggregate and 330 kg of RFA is CNY 14.29 and CNY 17.99, respectively, while the cost of 1 t of waste concrete directly to landfill is 143.48 yuan .Sustainability Free Full-Text Carbon Emission Evaluation of
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Factors affecting the price of recycled concrete: A critical
Fifteen factors are found to be influential: (1) selling cost of recycled aggregate; (2) proportion of recycled aggregate substitutions; (3) water-to-cement ratio; (4) amount of cement usage; (5) use of supplementary cementitious materials; (6) use of admixtures; (7) production and installation costs; (8) transportation costs of recycledEven though recycled coarse aggregate (RCA) is a cost-effective material that provides solutions to solid waste management, it is also viewed as second-rate in terms of its basic properties...(PDF) Cost-Benefit Analysis of Using Recycled Coarse Aggregate
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CO2 emission and construction cost reduction effect in cases
The use of recycled aggregate is important for the environmental sustainability of the construction industry because it can not only reduce the need for waste landfills, but can also reduce the depletion of natural aggregates.In this research, experimental work was conducted to validate the efficiency of Ceramic Waste Powder (CWP), Ceramic Fine Aggregate (CFA) and Recycled Coarse Aggregate (RCA) as a replacement for cement, Natural Fine Aggregate (NFA) and Natural Coarse Aggregate (NCA) respectively.Using recycled coarse aggregate and ceramic waste to
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Environmental and Economic Life Cycle
Abstract. The incorporation of recycled aggregates in concrete not only reduces the extraction of natural resources, but also decreases landfill disposal of construction and demolition waste. Hence, Figure 3 presents the unit cost of each type of aggregate, collected from Portuguese companies,suppliers from Serbia,companies from Australia,and quarries and recycling plants in South Africa . It can Environmental and Economic Comparison of
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The impact of recycled coarse aggregates obtained from
In previous studies, if the amount of coarse grains in the aggregate mass increased or if the D max value (maximum aggregate size) increased, then the density decreased. Kim and Lee ( 2010 ) produced pervious concretes from aggregates with 5 different gradations and D max values of 8, 12, 13, and 19 mm and found that, generally, The mixtures were made with different percentages of recycled coarse aggregate compared to the natural coarse aggregate (0% 30% 50% 70% 100%). For each mixture, the quantities of the other components are assumed equal.Comparative environmental evaluation of recycled aggregates
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Bio-deposition approaches for sustainable
The cleaned and dried recycled aggregate was soaked into a 500 mL volumetric cylinder and shaken to remove air bubbles. After the bubbles were drained, water was poured into the volumetric cylinder 1. Introduction. The incorporation of recycled aggregates (RAs) in concrete contributes to the European Union’s (EU) goal of 70% of non-hazardous construction and demolition waste (CDW) reuse/recycling, defined in EU Directive 2008/98/CE [].The technical feasibility of recycled aggregate concrete (RAC) has been demonstrated in Environmental and Economic Life Cycle Assessment of Recycled Coarse
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Comparative environmental evaluation of recycled aggregates
The natural coarse aggregate is obtained from crushed granite rocks with a size of between 5 mm and 20 mm. It varies in quantities from 0 to 910.1 kg/m 3. Recycled Coarse Aggregate (RCA). The large recycled aggregate is obtained by crushing concrete of which only the fraction with a nominal diameter between 5 mm and 20 mm has been a Fixed plant, b Mobile plant, c Dry, d Wet, e 50% of recycled aggregate, f 100% of recycled aggregate. Figure 4 . GWP (kg CO 2 eq) vs. PE- NRe (MJ) results from the literature review, per tonne(PDF) Environmental and Economic Comparison of Natural and Recycled
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FOHG&RQFUHWH IOPscience
production cost of recycled aggregate than that of natural aggregate, the increased costs could be Coarse aggregate Sand Fly ash Free water Absorbed water RC5 0.63 35% 222.3 1044.85 562.61 95.2 200 195 57.99 energy consumption per unit of transportation of materials, CO2 emission factor and mixIt was reported that the long-term net benefit of producing coarse recycled concrete aggregate (CRCA) from waste concrete was positive with a value of US$ 22,334,116 per year, while that of crushed coarse natural aggregate (CNA) was a negative net value of US$ 31,841,109 per year.Comparative analysis on costs and benefits of producing
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Experimental Study of Recycled Aggregate Concrete
The current annual consumption of concrete in the world is around 20 billion tons per year (Tosic et uses both recycled fine and coarse aggregate for concrete production and the author concludes that there is a slight increase in the compressive strength of concrete mixes when NS was replaced with RCFA regardless of the coarse Choose P.O 42.5 grade Portland cement. Sand is general natural sand with fineness modulus of 2.6, particle size range of 0 ∼ 4.75 mm. The coarse aggregate with a particle size of 5 ∼ 20 mm (see Fig. 1 ce:float-anchor refid="fig2"/>). Recycled coarse aggregate comes from the abandoned test wall of the structural laboratory of Shenyang Experimental research on compressive properties of recycling
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Improving the performance of recycled aggregate concrete
Research efforts [5], [6] showed that improvement in the tensile strength of plain concrete using artificial fibers leads to notable reductions in the carbon footprint and cost of pavements per unit area. The use of coarse recycled aggregates (CRA) derived from construction wastes can resolve environmental problems.The recycled coarse aggregate (RCA) concrete satisfied the specified 28-day design strength of 25 MPa and 40 MPa at 28 days and a mean compressive strength of 60 MPa at 90 days. The required stress to induce unit strain in concrete at elastic limit is denoted as the modulus of elasticity. This impacts the axial shortening and short termApplied Sciences Free Full-Text Feasibility of Developing
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Performance of Structural Concrete Using Recycled Plastics as Coarse
Approximate value for aggregate volume for water cement ratio is Volume of coarse aggregate per unit volume of total aggregate = 0.62. This material is furthermore cost-effective to produce and comes widely available as a waste material in many markets. Recycled plastics as coarse aggregate for structural concrete. IJIRSET 2(3):687Recycled coarse aggregate: kg: 809.000: 566.000: cost reduction in apartment complexes appears larger because the result of the significant reduction in the material cost per unit. Fig. 18 shows the average ECO 2 emission cost reduction from applying the RCA for each type of material to the 31 apartments.CO2 emission and construction cost reduction effect in cases
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Eco-friendly concrete with waste ceramic tile as coarse aggregate
The drive towards circular economy in achieving sustainable concrete cannot be overemphasized. The recycling of waste tiles from the ceramic industry, demolished buildings, or during the construction process could be one way of solving the waste generated from ceramic tiles. This study investigates the use of waste ceramic This study conducts a comprehensive lifecycle cost analysis (LCCA) of an urban highway section “E10” in the hot Middle Eastern climate of Abu Dhabi, where virgin asphalt usage is dominant, using actual cost data under multiple scenarios and recycled construction waste (RCW) usage across aggregate layers and recycled asphalt Lifecycle Cost Analysis of Recycled Asphalt Pavements: Determining Cost
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Effect of Parent Concrete on the Performance of Recycled Aggregate Concrete
Recycling concrete construction waste is a promising way towards sustainable construction. Indeed, replacing natural aggregates with recycled aggregates obtained from concrete waste lowers the environmental impact of concrete constructions and improves natural resource conservation. This paper reports on an experimental 2.1. Characterisation of raw materials. In this research two types of aggregates were used, consist of a) natural aggregate (NA), including crushing of calcareous origin as coarse aggregate (NCA), and natural sand, washed from a river, as a fine aggregate, b) recycled concrete aggregate (RCA), obtained from supplier Areia Bela Concrete produced with recycled concrete aggregate
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Factors affecting the price of recycled concrete: A critical
Recycling is regarded as an ideal approach to deal with C&D waste. However, the adoption of market for recycled concrete from C&D waste is slow because quality and price are two major factors hindering its wide acceptability. It is observed that the price of recycled concrete is 0–10% higher than that of virgin concrete.NA River aggregate River RA Recycled coarse aggregate Demolished reinforced concrete structure Jullien et al. (2012) [14] NA Site 1—amphibolites from Roselier Site 2 and 3—alluvial deposits, Fz and Fy (sand and gravel)-RA - Simion et al. (2013) [15] NA Natural inert quarries Quarry RA C&D inert waste CDW recycling plant Tošic´ et alEnvironmental and Economic Comparison of Natural and
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Recycled coarse aggregates from precast plant and
A comparison of a precast plant with the provision of natural coarse aggregate (NCA) and recycled concrete coarse aggregate (RCCA) was developed to obtain the potential reduction of CO 2 emissions, water consumption, and cost incurred. This section presents the description of the base case and the alternative scenarios of the The variables considered included the mass replacement rate of recycled coarse aggregate (M RCA: 0, 50%, and 100%), steel fiber volume content (V SF: 0, 0.6%, 1.2%, and 1.8%), and GFRP tube thickness (T: 4 mm, 6 mm, and 8 mm). The failure patterns of these CFFT columns were compared, the contribution of the GFRP tube to Effects of recycled fine aggregate and steel fiber on
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