تعتبر شركة Olux شركة رائدة ومتميزة على المستوى الدولي في مجال البحث والتطوير وتصنيع وبيع محطات التكسير والغربلة واسعة النطاق ومعدات الطحن الصناعية ومصانع الاستفادة.
This study investigates the effects of variations in the coarse-to-fine aggregate ratio and water/binder (w/b) ratio on the fresh, hardened, and durability properties of SCC. ... Self-compacting concrete with recycled coarse aggregates from concrete construction and demolition waste–Current state-of-the art and perspectives. Constr. Build ...
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In this study, the strength and fracture parameters of slag-based geopolymer mortar (SGPM) using different molarities of sodium hydroxide and different percentages of recycled …
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Interests: recycled aggregate concrete; sustainable construction; construction waste management ... in strengthening mechanical properties of the concrete with coarse aggregates partially replaced with recycled brick aggregates (B-waste), an experimental framework was conducted. ... Under the condition of a 1:4 cement-sand ratio, RP was used to ...
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Standards usually limit the use of recycled aggregate to 30% in structural elements. There is no consensus on methods of mix design for recycled aggregate concrete. It is …
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The results show that, depending on the ratio of recycled aggregate, the compressive strength is similar to that of normal concrete and does not deteriorate. ... (193,977 tons/day). Waste construction material accounted for 99.4% (192,812 tons/day) of the noncombustible waste, and waste concrete represented 71.5% (137,816 tons/day) of the waste ...
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These data relate to the binder, the type of aggregate, the proportions of water and binder, the binder/aggregate ratio, the air content, the bulk and absolute densities of the binder and the …
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Using recycled aggregates from construction and demolition waste can preserve natural aggregate resources, reduce demand of landfill, and contribute to sustainable built environment. This study provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, recycling, reuse and manufacture …
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For each cement content, the four concrete mixes incorporated fine aggregate replacement ratios of 0% (control), 25%, 50%, and . The hardened concrete tests involved cubes, cylinders, and prisms. ... On the Development of a Technical Specification for the Use of Fine Recycled Aggregates from Construction and Demolition Waste in Concrete ...
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Recycling of waste concrete to obtain the recycled concrete aggregates (RCA) for base and/or sub-base materials in road construction is a foremost application to be promoted to gain economical and ...
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Mortars produced with recycled aggregates from construction and demolition waste – Analysis and construction site application. Author links open overlay panel Ana Antunes a, Hugo ... considering the combination of binders and the respective water-binder and binder-aggregates ratios; and (ii) the different RA and respective proportions ...
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Phase 2: The mortar cubes and concrete cubes were casted as per IS 2250 [] and IS 10262 (2019) respectively.The mortar cubes were designed for MM 7.5 grade, concrete cubes made of Natural aggregates were designed for M25 grade and concrete cubes made of recycled aggregates were designed for M25 by varying water-cement ratio.
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Accordingly, the researchers conclude that concrete, produced by replacing coarse aggregate with plastic waste of up to 15%, can be used in the construction of sidewalks, stairs, interior walls, short walls, storage tanks, non-structural slabs, coating works, etc. Saikia and De Brito (2012) conducted an extensive review of some research related ...
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The construction waste (Figure 1), mainly composed of fragment concrete, mortar, bricks, and tiles, was used as recycled aggregate, whose density is 2.62 g/cm 3.Clear construction waste was collected by two stages of crush at Harbin Jinlu Renewable Resources Co., Ltd, and it was sieved into five particle size ranges: 0∼2.5 mm, 2.5∼5 mm, 5∼10 mm, …
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Impact of sand to aggregate ratio on mechanical properties and micro-structures of waste crumb rubber concrete. Author links open overlay panel Jinxu Mo a, Fengming Ren a b, ... Concrete being the most commonly utilized construction material, natural aggregates usually make up over 60% of the total concrete volume ...
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recycled aggregate to stabilize the supply and demand of aggregate. As of 2019, the total amount of domestic construction waste was 221,102 tons/day, and noncombustible waste rep-resented the highest proportion at 87.8% (193,977 tons/day). Waste construction material accounted for 99.4% (192,812
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RCA is engendered from the construction and demolition waste (CDW). The use of RCA in concrete has revealed to be a sustainable and economical alternative to natural …
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Parametric study: effect of type and replacement ratios of waste materials. Cementitious: Cement: Recycled: Concrete,mosaic-tiles, and clay-brick waste aggregates: Immersion under water and water spraying (2 times a day)-Compressive strength-Water absorption (Botha et al., 2023) Parametric study: effect of replacement ratios of waste …
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The findings suggest that low-grade recycled aggregates sourced from construction waste sorting facilities have the potential for use in producing non-structural precast concrete blocks. ... The compressive strength of SMBs in each cement-to-aggregate ratio mix from 1:6 to 1:15 compared to the previous ratio has decreased, varying between 7.4% ...
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The current study investigates concrete performance in terms of compressive strength, splitting tensile strength, stress–strain characteristics, and water absorption produced …
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Therefore, the use of wood waste in construction material will reduce the negative impact of the waste on the environment and will conserve natural resources. Construction and demolition waste is one of the materials that has been used to replace the conventional aggregate (Tang et al. 2021a,b). According to the study conducted to collect data ...
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ratio of cemented filling material using construction waste as recycled coarse aggregate was carried out. A ternary quadratic regression model was created using the Box-Behnken design (BBD) based ...
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The main aim of this study has been to determine the influence of total water to cement ratio, recycled fine aggregate from construction and demolition waste, and air entraining/plasticizer ...
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In this study, the researchers introduce an innovative method to enhance the utilization of recycled coarse aggregates (RCA) derived from construction and demolition waste (C&D) in sustainable ...
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However, the sample containing the recycled aggregate of stone factory wastes has a higher compressive strength than the sample containing recycled aggregate of construction wastes. On the other hand, the most optimal percentage of recycled aggregate replacement is 30%. 2.4.3. Tensile Strength Test
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Concrete Performance Produced Using Recycled Construction and By-Product Industrial Waste Coarse Aggregates. ... natural scoria, by-product industrial waste aggregate, ... several precautions were taken. First, the coarse aggregate-to-fine aggregate ratio by volume was kept fixed at 1.48 for the two concrete mixtures. Second, the relative ...
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• The sand-to-aggregate ratio will be the sam e as for natural ... One solution to address the growing construction waste challenge is adopting large-scale recycling of concrete waste into ...
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Geopolymers are in many applications a perfect alternative to standard cements, especially regarding the sustainable development of green building materials. This experimental study therefore deals with the investigation of different factors, such as the water content and the binder to aggregate ratio, and their influence on the workability of fresh mortar and its …
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What Is Concrete Mix Ratio? The Concrete Mix Ratio is the ratio of concrete ingredients like cement, fine aggregate (sand), coarse aggregate (gravel), and water. These mixing ratios are decided on the basis of the type of construction and the mixed designs of the materials.. There are several different types of concrete mix ratios, each of which is designed to meet specific needs …
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At 21 MPa, an increase in the recycled aggregate mixing ratio resulted in a 3–4% lower freeze-thaw resistance compared to regular concrete, while at 24 and 27 MPa, the freeze …
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The acid dissolution of 3 kg of C&D waste resulted in an effective separation of materials and yielded 0.745 kg of binder material, which can be repurposed as SCM, and 2.201 kg of aggregates suitable for use as fine aggregate in the construction industry.
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The disadvantage of the process is resultant Concrete Construction and Demolition Waste (CC&DW) that needs to be transported, and if not recycled, deposited in landfills. ... Larger sand to aggregate ratio can also increase the slump, whereas a larger proportion of coarse aggregate is favorable to improving compressive strength [4]. To ...
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The aim of this paper is to explore further in the use of recycled aggregates from construction and demolition waste (CDW) in concrete mixes so as to improve upcycling. ... aggregate ratio will be ...
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Recycled fine aggregate from C&D waste was obtained from a construction waste disposal plant in Beijing, China (Fig. 1). The most prominent feature of C&D waste from Beijing is the large amount of red brick, as compared with those from other areas such as Hong Kong, the United States and Turkey [5], [24], [25]. It also contains much mortar and ...
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1. Introduction. It has been reported that a developed country like Australia produces 8.7 million tons of waste demolition concrete, 1.3 million tons of waste brick, 3.3 million tons of waste excavation rock, 1 million tons of waste glass, and 1.2 million tons of waste asphalt every year [].According to other statistics [], 42% of all wastes in Australia are related to …
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The global demand for construction quality aggregates is expected to be more than 51 billion metric tons by 2019 [1].The mining, processing, and transport operations for such a large quantity of aggregates consume a huge amount of energy and adversely affect the ecology of the areas and riverbeds [2].Ever increasing demand for quality aggregates has resulted in a faster …
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Recycled aggregates (RA) from construction and demolition waste (CDW) instead of natural aggregates (NA) were analysed in the manufacture of new eco-friendly concrete. Fine (FRA) and coarse (CRA) recycled aggregates were used in different percentages as substitutes of natural sand and gravel, respectively. The results revealed that the use of RA in percentages …
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