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.
Notable examples include studies on: recycled concrete aggregate properties with amounts of old adhered mortars (Duan and Poon Citation 2014), the current status on the use of recycled aggregates in concrete (De Brito and Silva Citation 2016), a critical review and assessment of recycled aggregate as a sustainable construction material (Kisku ...
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After demolition of old roads and buildings, the removed concrete is often considered worthless and disposed of as demolition waste. By collecting the used concrete and breaking it up, recycled concrete aggregate (RCA) is …
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Ming investigated the application of recycled concrete aggregate derived from construction waste in road sub-bases, discovering that the water absorption rate of the recycled aggregate is three times that of the natural aggregate. Although there are differences in density, crushing value, and Los Angeles abrasion value compared to the natural ...
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This research work aims at making one such experiment where recycled aggregates are produced from C&D waste thus paves a way, for the effective management of concrete debris.
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In the light of the ever-increasing need of circular economy in the construction industry and of the recent advances in research and development on the use of recycled aggregates, produced from construction and demolition waste, in new construction materials, this paper presents a compilation of representative case studies of several applications, namely …
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Concrete is an attested building material because of its versatility and cost-effectiveness. Thus, it is the second most consumed material in the world after water (ISO/TC 71 2005; Weil et al. 2006; Knoeri et al. 2013).Its production and use is escalated by about 12 times since the Second World War and in present scenario the yearly per capita concrete production …
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Pavements, footpaths and other civil engineering applications of recycled aggregate 6.1. Roadway infrastructure A pavement is a multi-layer system which directly supports traffic and transmits the vehicular load to the road base. It consists of a concrete slab or asphalt slab resting on the foundation system formed by several overlapping layers ...
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In the construction industry, natural aggregates (NA) can be replaced by recycled concrete aggregates (RCA), which can address the issue of construction-waste disposal and resolve the dilemma between demand and …
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Different raw materials should be used to prepare RA for various applications of recycled aggregate concrete (RAC). In instances of low design strength, RA can be produced from standard CDW [18]. RA should be prepared in scenarios with higher design strengths by selecting regional concrete from load-bearing columns with higher original ...
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Using recycled aggregate at the replacement levels of up to , concrete paving blocks with 28 day compressive strength of not <49 MPa can be produced. The …
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DOI: 10.1016/j.conbuildmat.2024.136567 Corpus ID: 269823645; Modification of recycled aggregate and conservation and application of recycled aggregate concrete: A review @article{Wu2024ModificationOR, title={Modification of recycled aggregate and conservation and application of recycled aggregate concrete: A review}, author={Lei Wu and Zhe Sun and Yan …
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In this scenario, replacing NA with recycled aggregate (RA) from C&DW and other wastes can mitigate environmental problems. We review the use of RA for concrete production and draw …
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Concrete is the world's most extensively manufactured material, with the integration of recycled materials becoming crucial for sustainable construction. This study investigates the mechanical properties of concrete mixes containing Recycled Aggregates (RA) and Portland Slag Cement (PSC) to understand their suitability for sustainable construction applications. Utilizing …
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This paper aims to establish a technique for easy concrete recycling as a solution essential for the creation of a closedloop recycling society. The technique introduced in this study enables improvement of the recovery rate of original aggregate by enhancing the peeling-off effect of aggregate without any degradation of mechanical properties. The enhanced peeling-off effect …
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This monograph addresses the use of recycled concrete aggregates (RCA) as a replacement for natural aggregates (NA) in concrete applications.
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In this paper, the most-concerned questions of recycled aggregate concrete (RAC) application, i.e., the structural safety performance, the availability of design code and project experience, and ecological and economic costs, are overviewed, aiming to find the answer to whether it is feasible to apply RAC in main structural components technically and practically.
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Recycled aggregate concrete (RAC) is a new type of concrete produced using crushed, screened, and washed recycled aggregate obtained from waste concrete to replace natural aggregate (NA) partially or completely [1]. ... Therefore, it will facilitate the applications of recycled concrete aggregate if the adhered cement mortar can be enhanced ...
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To dispose of CDW and slow down the depletion of natural resources, the use of recycled aggregates (RA) prepared from CDW as a substitute for natural aggregates (NA) in …
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A Review of Recycled Aggregate in Concrete Applications (2000–2017). Construction and Building Materials, Vol. 172, 2018, pp. 272–292. Crossref. Google Scholar. 10. Slattery K. Global Developments in the Aggregate Industry – …
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Fig. 10 shows concrete containing natural coarse aggregate and recycled brick coarse aggregate (Liu et al., 2021). Hence, the RCA's physical, chemical, and mechanical characteristics must be investigated before use (Mills-Beale and You, 2010). As previously discussed, it is important to note that these properties would differ from the ...
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Download Citation | Application of Intensification Approaches on Recycled Aggregate | The wasted cement mortar and internal cracks induced by the secondary breaking process existing on/in recycled ...
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Concrete is a composite material used worldwide as a major construction material [1].Nearly 1.5 billion tons of crushed stone were produced in 2021 for concrete production, a 3% increase compared to 2020, which saw a production of over 1.47 billion tons of crushed stone [2].This significant increase in aggregate demand resulted in the depletion of natural resources …
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Application of artificial bee colony programming techniques for predicting the compressive strength of recycled aggregate concrete. ... Recycled aggregate concrete is a type of environmentally-friendly concrete in which natural aggregates are substituted by recycled aggregates. Compressive strength is considered as one of the most important ...
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This paper deals with performance of concrete by using recycled coarse aggregate (RCA) to replace 30%, 50%, and 70% of natural coarse aggregate. Three concrete types were studied: Group A using RCA with 10% of silica fume (SF) addition by weight of cement, Group B using RCA with 30% of fly ash (FA) substitution by weight of cement, and the ...
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Application of optimization-based regression analysis for evaluation of frost durability of recycled aggregate concrete. Mahzad Esmaeili-Falak, ... To improve recycled aggregate concrete (RAC) technologies in permafrost, it is essential to certify the stability in frost-induced conditions.
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Typical CBR test results for RCA Acta Sci. Pol. 55 Application of recycled concrete aggregate in road engineering The disturbances during the CBR test may be caused by loose grains on top of the CBR cylinder and the crushing process. The crushing phenomenon was previously studied. The RCA tends to undergo crushing even during the Proctor tests ...
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be due to uneven application over whole recycled coarse aggregate including paste parts of high water absorption. Ultimate water absorption is 3.5% for an oil-type agent and 1% for a silane-type ...
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Request PDF | Application of recycled coarse aggregate by mixture to concrete construction | With regard to the technology for producing aggregate of recycled concrete from concrete blocks, a ...
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For instance, Allali et al. [41] conducted a study on the application of 60% recycled concrete aggregate (with a size of 4.75–19 mm) and 40% sand (with a size of 0–2.36 mm) as a …
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For recycled concrete aggregate from concrete waste, the use of up to 90% of recycled aggregate is allowed if water absorption is at most equal to 10% and content of contaminants up to 0.2%; meanwhile, for recycled concrete aggregate from demolition waste, the content of recycled aggregate is limited to 70%, while the limits for water ...
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Recycled Concrete Aggregate (RCA) is different from natural aggregate because of RCA's cement paste and contaminants that cause low density and high porosity. In many cases, these properties of RCA that lead to poor engineering qualities are the major reasons that RCA is not recommended as aggregate for Hot Mix Asphalt (HMA). In this research, the performance …
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The aggregates used in construction are the natural resource consumed the most in the world after air and water. Due to overexploitation, all environmental laws reward the use of recycled materials to guarantee the reduction of consumption of natural aggregates. The use of reclaimed aggregates, reused aggregates, and recycled aggregates increases sustainability in …
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the utilization of Recycled Asphalt Pavement (RAP) aggregate and Recycled Concrete Aggregate (RCA) have been performed over the past twenty years and have utilized various testing protocols (Kandhal et al., 1995; Sondag et al., 2002; Tam et al., 2004). In one of the early studies on recycled aggregate, Ramzi
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Mechanical properties of recycled aggregate concrete proportioned with modified equivalent mortar volume method for paving applications Constr. Build. Mater., 136 ( 2017 ), pp. 9 - 17
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Recycled aggregate is classified into three types according to composition and density, and the maximum content of various contaminants is limited, Table 7.3. Table 7.4 shows the maximum allowed replacement percentage of recycled aggregate depending on aggregate type, concrete strength class and exposure conditions.
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For around 70 years, research has showed that using recycled aggregates (RAs) from CDW to replace natural aggregates (NAs) in new concrete application as recycled aggregate concrete (RAC) can provide benefits for the environment and economy.
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