Recycled Coarse(再生粗)研究综述
Recycled Coarse 再生粗 - The rates of replacing natural aggregates with recycled coarse were 0%, 10%, and 20%. [1] Also, it was found that applying the recycled coarse and fine aggregates in concrete mixes with percentage of replacement 100% resulted in a less decreases in the strength. [2]再生粗骨料替代天然骨料的比例分别为 0%、10% 和 20%。 [1] 此外，还发现在混凝土混合料中使用再生粗骨料和细骨料，替换百分比为 100%，导致强度降低较少。 [2]
recycled aggregate concrete 再生骨料混凝土
In this experimental study, the behavior of recycled aggregate concrete (RAC) incorporating 100% recycled coarse (RC) aggregate is examined. [1] For decades, research on the mechanical properties and durability of recycled coarse aggregate (RCA) to make recycled aggregate concrete (RAC) has been widely investigated. [2] Recycled aggregate concrete (RAC) specimens with different water–cement ratios and replacement levels of recycled coarse aggregate (RCA) were prepared. [3] This paper investigates the time-dependent reliability of recycled aggregate concrete (RAC) beams made with 50% incorporation of recycled coarse aggregates. [4] This paper investigates the compressive strength of recycled aggregate concrete having the replacement of 0, 30, 40, 50 & 60% recycled coarse aggregates. [5] Three point bending fracture tests of recycled aggregate concrete beams with different recycled coarse aggregate replacement ratio (0%, 30%, 50%, 70%, 100%) have been carried out, with results analyzed by digital image correlation (DIC) method and the traditional electrometric method. [6] The effect of moisture condition and recycled brick aggregate (RBA) content in recycled coarse aggregate (RCA) on the rheological properties of recycled aggregate concrete (RAC) was examined in this study. [7] For decades, recycled coarse aggregate (RCA) has been used to make recycled aggregate concrete (RAC). [8] This study focuses on the fracture behavior of recycled aggregate concrete (RAC) after exposure to elevated temperatures, thus, a total of 128 cubic specimens and 64 notched beams were cast to analysis the effects of recycled coarse aggregate (RA) substitutions (0%, 30%, 70% and 100%) and elevated temperatures (20 °C, 100 °C, 200 °C and 300 °C) on fracture parameters of RAC, such as peak load (Pmax), critical crack mouth opening displacement (CMODc), critical crack tip opening displacement (CTODc), effective crack length (ac), fracture energy (GF), initiation fracture toughness ( K I C i n i ) , unstable fracture toughness ( K I C u n ), the characteristic length (Lch) and so on. [9] Five recycled coarse aggregate (RCA) treatment techniques including flow-through carbonation, pressurized carbonation, wet carbonation, nano silica (NS) pre-spraying and combined pressurized carbonation with NS pre-spraying, were utilized to improve the performance of recycled aggregate concrete (RAC). [10] One such option is the utilization of construction and demolition wastes, preferably named as recycled coarse aggregates (RCA) to produce a sustainable recycled aggregate concrete (RAC). [11] Recycled aggregate concrete is a sustainable concrete produced with recycled coarse aggregate (RAC) from demolition wastes generally used to fabricate non-structural elements. [12] This paper presents an investigation on the effects of recycled coarse aggregate (RCA) replacement ratio and recycled rubber particle (RRP) size on the hysteretic energy and damping variation of recycled aggregate concrete (RAC) under various cyclic compression loadings. [13] The experimental programme, adopting four series of column specimens designed with various stainless steel tube sizes, recycled coarse aggregate replacement ratios and member lengths, included material tests on both recycled aggregate concretes and stainless steel tubes, initial global geometric imperfection measurements and pin-ended column tests. [14] This study has endeavored to investigate the effects of using recycled coarse aggregates (RCA), various types of wastewater effluents, fly ash, and glass fibers on the mechanical and durability behavior of recycled aggregate concrete (RAC) incorporating with fly ash and glass fibers (FGRAC). [15] This chapter focuses on the feasible use of partial cement substituted by fly ash in 100% recycled coarse aggregate-based concrete (feasible use of fly ash in recycled aggregate concrete [FARAC]). [16] To investigate the seismic performance of recycled aggregate concrete (RAC) members in a freeze-thaw environment, the seismic fragility analysis of RAC bridge columns with different recycled coarse aggregate (RCA) replacement ratios subjected to freeze-thaw cycles (FTCs) was performed by the cloud analysis method. [17] The effects of the strain rate, hoop reinforcement confinement, and replacement ratio of recycled coarse aggregate (RCA) on the mechanical properties of confined recycled aggregate concrete (CRAC) are thoroughly analyzed and assessed. [18] The structural performance of recycled aggregate concrete (RAC) made with different proportions of recycled coarse aggregate under various types of loads are presented. [19] In order to study the mechanical properties of recycled aggregate concrete (RAC) specimens after exposure to high temperatures, 120 RAC prism specimens, 57 reinforced recycled aggregate concrete (RRAC) specimens, and 56 steel reinforced recycled aggregate concrete (SRRAC) specimens were designed, involving two varying parameters such as recycled coarse aggregate (RCA) replacement percentage and temperature. [20] The mechanical properties of recycled aggregate concrete (RAC) may be affected by the service time of parent concrete used to produce the recycled coarse aggregate (RCA), which has not been experimentally investigated. [21] This paper studied the shear behavior of three types of recycled aggregate concrete with different replacement levels of recycled coarse aggregate. [22]在本实验研究中，研究了含有 100% 再生粗 (RC) 骨料的再生骨料混凝土 (RAC) 的性能。 [1] 几十年来，对再生粗骨料 (RCA) 制备再生骨料混凝土 (RAC) 的力学性能和耐久性的研究已得到广泛研究。 [2] nan [3] nan [4] nan [5] nan [6] nan [7] nan [8] nan [9] nan [10] nan [11] nan [12] nan [13] nan [14] nan [15] nan [16] 为研究再生骨料混凝土（RAC）构件在冻融环境中的抗震性能，采用不同再生粗骨料（RCA）置换比对再生骨料混凝土（RAC）桥柱进行冻融循环（FTCs）的抗震脆性分析。云分析法。 [17] 对应变率、箍筋约束和再生粗骨料（RCA）替代率对约束再生骨料混凝土（CRAC）力学性能的影响进行了深入分析和评估。 [18] nan [19] nan [20] nan [21] nan [22]
natural coarse aggregate 天然粗骨料
This paper present the laboratory investigation on replacing of Natural Coarse Aggregate (NCA) with Recycled Coarse Aggregate (RCA) in concrete while Cement is replaced by Metakaolin (MK) and GGBS (Ground Granulated Blast-furnace Slag), as varying content of GGBS as 10%, 15%, 20%, and 25% with amount of MK was fixed at 10% by weight. [1] In addition, the recycled coarse aggregate was used at 100% in terms of mass instead of natural coarse aggregate. [2] More specifically, the present research aims to analyze the environmental impacts caused by five mixtures of concrete, with similar mechanical properties and workability, but with a different amount of recycled coarse aggregate and natural coarse aggregate (0% - 30% - 50% - 70% - 100%). [3] The application of recycled coarse aggregate (RCA) made from waste concrete to replace natural coarse aggregate (NCA) in concrete structures can essentially reduce the excessive consumption of natural resources and environmental pollution. [4] In contrast, the natural coarse aggregates were replaced by recycled coarse aggregate using five different replacement percentages, i. [5] One of the eco-friendly alternatives for conventional concrete (CON) is the system that incorporates recycled coarse aggregates (RCA) as the replacement of natural coarse aggregates (NCA) and fly ash (FA) as the partial replacement of Portland cement (OPC). [6] Using sea sand instead of river sand and recycled coarse aggregates instead of natural coarse aggregates to prepare sea sand and recycled aggregate concrete (SSRAC) can help preserve sand and stone resources, reduce construction costs, and protect ecological environments. [7] , alkali-activated concrete (AAC) with natural coarse aggregates, AAC with recycled coarse aggregates (RCA), and bacterial concrete (BC). [8] The data set was used to develop an ANN, whose optimal structure was determined using the trial-and-error method by taking cement content (C), sand content (S), natural coarse aggregate content (NCA), recycled coarse aggregate content (RCA), water content (W), water–colloid ratio (WCR), sand content rate (SR), and replacement rate of recycled aggregate (RRCA) as input parameters. [9] Shortage of natural coarse aggregate in future can be solved by replacing it with recycled coarse aggregate from demolition waste itself. [10] To improve the structural application of steel fiber-reinforced concrete with recycled aggregates (SFRC-RA) composited in gradation by large-particle natural coarse aggregate and small-particle recycled coarse aggregate, the large eccentric compression behavior of eight SFRC-RA columns was experimentally investigated in this paper. [11] Demolished concrete was used recycled coarse aggregates in equal proportion with natural coarse aggregates. [12] This research deals with partial replacement of natural coarse aggregates (NCA) with recycled coarse aggregates (RCA) of age group 30 years and 35 years in different proportions like 20%, 30%, 40%. [13] In this investigation, SCC is modified by recycled coarse aggregate (RCA) in various percentages of natural coarse aggregate (NCA) substitutes from 0 percent to 100 percent with a 20 percent increase. [14] High-strength concrete (HSC) containing recycled coarse aggregate (RCA), as a partial replacement of natural coarse aggregate, is tested in this paper to have information on RCA concrete behavior at high temperature. [15] Also, it was observed that the optimum percentage of replacement of natural coarse aggregates by recycled coarse aggregates was about 45%. [16] Between 14 and 21% of cumulative energy consumption and 25–31% of global warming, impacts could be avoided with the use of 50 natural coarse aggregate (NA)+50100 recycled coarse aggregate (RA)+90 ordinary Portland cement (OPC)+10SF and 50NA+50RA+60OPC+30FA+10SF concrete formulations instead of 100NA (natural aggregate)+100OPC concrete to provide the same compressive strength. [17] This paper compares environment impacts of recycled coarse aggregate (RCA) and Particle Packing Method (PPM) of mix design approach with the concrete proportioned using natural coarse aggregate (NCA) and IS code method. [18] Recycled coarse aggregate (R-CA) from concrete demolition was used as a full replacement for natural coarse aggregate (N-CA). [19] The use of recycled coarse aggregate (RCA) can reduce the consumption of natural coarse aggregate (NCA) and preserve the natural environment. [20]本文介绍了在混凝土中用再生粗骨料 (RCA) 代替天然粗骨料 (NCA) 而用偏高岭土 (MK) 和 GGBS (磨碎的高炉渣) 代替水泥的实验室研究，因为 GGBS 的含量不同， 10%、15%、20% 和 25% 与 MK 的量固定为 10% 重量。 [1] 此外，以质量计100%使用再生粗骨料代替天然粗骨料。 [2] nan [3] nan [4] nan [5] nan [6] nan [7] nan [8] nan [9] 未来天然粗骨料短缺的问题，可以用拆迁垃圾本身的再生粗骨料代替。 [10] 为提高大颗粒天然粗骨料和小颗粒再生粗骨料级配复合再生骨料钢纤维混凝土（SFRC-RA）的结构应用，对8根SFRC-RA柱的大偏心受压行为进行了试验研究。本文进行了调查。 [11] nan [12] nan [13] nan [14] 本文测试了含有再生粗骨料 (RCA) 的高强混凝土 (HSC) 作为天然粗骨料的部分替代品，以了解 RCA 混凝土在高温下的性能。 [15] nan [16] nan [17] nan [18] nan [19] nan [20]
self compacting concrete 自密实混凝土
The influence of four factors (water-binder ratio, recycled coarse aggregate replacement rate, fly ash substitution rate, and superplasticizer content) on the workabilities and mechanical properties of recycled coarse aggregate self-compacting concrete (RCASCC) was studied using the orthogonal test method. [1] In the present work, an experimental investigation was carried out on self-compacting concrete made with various replacement levels of recycled coarse aggregate. [2] One of the prime objectives of this review is to understand the role of design parameters on the mechanical properties (Compressive and split tensile strength) of Self-Compacting Concrete (SCC) with recycled aggregates (Recycled Coarse Aggregates (RCA) and Recycled Fine Aggregates (RFA)). [3] The current study compares the properties of self-compacting concrete with 0 percent, 25%, 50%, 75%, and 100% substitution of recycled coarse aggregate in the fresh and hardened states. [4] The present investigation has been piloted to evaluate the overall feasibility of Self Compacting Concrete (SCC) prepared with Coal Bottom Ash (CBA) and Recycled Coarse Concrete Aggregates (RCA) by replacing of Normal Fine Aggregates (NFA) and Normal Coarse Aggregates (NCA) respectively. [5] The effect of recycled coarse aggregate (RCA) on the fresh and hardened properties of C40 self-compacting concrete (SCC) was investigated in this paper. [6] In the present study, self-compacting concrete beams with recycled coarse aggregate (25% replacement of total coarse aggregate by weight) were tested by varying aspect ratio (50, 70 and 100) of hook end steel fiber for constant fiber content of 0. [7] The purpose of this study is to analyze the influence of recycled coarse aggregates (RCA) used to manufacture self-compacting concrete with recycled aggregates (SCRC) by evaluating the char. [8] In this paper, the possibility of utilising foundry sand and recycled coarse aggregate (RCA) obtained from a ready-mix concrete plant for making self-compacting concrete (SCC) was evaluated. [9]采用正交试验法研究了水胶比、再生粗骨料替代率、粉煤灰替代率、减水剂含量4个因素对再生粗骨料自密实混凝土（RCASCC）和易性和力学性能的影响。 . [1] 在目前的工作中，对使用各种替代水平的再生粗骨料制成的自密实混凝土进行了实验研究。 [2] nan [3] nan [4] 目前的调查已进行试点，以评估用煤底灰 (CBA) 和再生粗混凝土骨料 (RCA) 制备自密实混凝土 (SCC) 的整体可行性，替代普通细骨料 (NFA) 和普通粗骨料 (NCA)分别。 [5] 本文研究了再生粗骨料（RCA）对C40自密实混凝土（SCC）新拌和硬化性能的影响。 [6] nan [7] nan [8] nan [9]
recycled fine aggregate 再生细骨料
m), replacement percentage of recycled coarse aggregates (RCA), replacement percentage of recycled fine aggregates (RFA), fresh density and loading area of the specimen. [1] Based on the compressive strength data of 13 groups of mixtures, which is larger than 30 MPa, and with the RA substitution rate not less than 50%, the RAC containing 50% recycled fine aggregate (RFA) (HDX50), 70% RFA (HDX70), and 50% recycled coarse aggregate (RCA) (HDC50) were selected. [2] Recycled coarse aggregate (RCA) has about 28% higher bonded mortar content (BMC) with porosity of bonded mortar (BM) almost double as that of recycled fine aggregate (RFA). [3] The utilization and recycling of mixed recycled aggregates (MRA) comprising recycled fine aggregates (RFA) and recycled coarse aggregates (RCA) were explored for construction applications using the coupled Taguchi-RSM optimization approach. [4] Test parameters include water-binder ratio, recycled coarse aggregate (RCA) replacement percentage, recycled fine aggregate (RFA) replacement percentage, bar surface shape, and anchorage length of reinforcements. [5]m)、再生粗骨料置换率(RCA)、再生细骨料置换率(RFA)、试件新鲜密度和载重面积。 [1] 根据13组大于30 MPa、RA替代率不低于50%的混合料抗压强度数据，RAC含50%再生细骨料（RFA）（HDX50）、70% RFA（选择 HDX70) 和 50% 再生粗骨料 (RCA) (HDC50)。 [2] 再生粗骨料 (RCA) 的粘结砂浆含量 (BMC) 高出约 28%，粘结砂浆 (BM) 的孔隙率几乎是再生细骨料 (RFA) 的两倍。 [3] nan [4] nan [5]
25 % 50 25 % 50
Seven mixes of concrete were casted using normal and recycled coarse aggregate and tested with different RCA replacement percentages of 0%, 10%, 15%, 20%, 25%, 50% and 75% respectively. [1] 0%, 25%, 50%, 75%, and 100%) of recycled coarse aggregate, the dynamic direct tensile tests, splitting tests, and spalling tests of recycled aggregate concrete in the strain-rate range of 100–102 s−1 were carried out using large diameter (75 mm) split Hopkinson tensile bar and pressure bar. [2] A total of five groups of RAC specimens with different recycled coarse aggregate (RCA) replacement percentages of 0, 25%, 50%, 75%, and 100%, respectively, are tested under both monotonic loading and cyclic loading. [3] The mass loss, ultrasonic velocity, dynamic modulus of elasticity and cubic compressive strength of recycled coarse aggregate concrete whose coarse aggregate replacement percentage is 25%, 50%, 75%, and 100% are tested and compared with NAC when the cycles of freezing and thawing are 0, 25, 50, 75, 100, 125, 150, 175, and 200 times. [4]使用普通和再生粗骨料浇注七种混凝土混合物，并分别用 0%、10%、15%、20%、25%、50% 和 75% 的不同 RCA 替代百分比进行测试。 [1] 0%、25%、50%、75%、100%）再生粗骨料，再生骨料混凝土在应变率100~102 s−1范围内的动态直接拉伸试验、劈裂试验、剥落试验使用大直径（75 mm）的分裂霍普金森拉伸杆和压力杆进行。 [2] 在单调加载和循环加载下分别测试了 5 组不同再生粗骨料 (RCA) 替代百分比分别为 0、25%、50%、75% 和 100% 的 RAC 试件。 [3] nan [4]
% 40 % % 40 %
Recycled coarse aggregate (RCA) was used to replace 30%, 40%, and 50% of the natural coarse aggregate (NCA), respectively, by volume in the samples, and the fine aggregate was a combination of 70% natural fine aggregate (NFA) and 30% recycled fine aggregate (RFA) by volume. [1] The present study aims to replace 30%, 40%, and 50% of the natural coarse aggregate (NCA) of concrete with recycled coarse aggregate containing used nano-silica (RCA-UNS) to produce a new sustainable concrete. [2] Six types of concrete mixtures were tested: concrete made entirely with natural aggregate as control concrete, and five types of concrete made with natural fine and recycled coarse aggregate (20%, 40%, 60%, 80%, and 100% replacement of coarse recycled aggregate). [3] Other six concrete mixes contain 0%, 40% and 60% GGBFS with each of 50% and 100% recycled coarse aggregate (RCA). [4]回收粗骨料 (RCA) 分别用于替代样品中 30%、40% 和 50% 体积的天然粗骨料 (NCA)，细骨料是 70% 天然细骨料的组合。 NFA) 和 30% 的再生细骨料 (RFA)（按体积计）。 [1] 本研究旨在用含有使用过的纳米二氧化硅 (RCA-UNS) 的再生粗骨料替代 30%、40% 和 50% 的混凝土天然粗骨料 (NCA)，以生产新的可持续混凝土。 [2] nan [3] 其他六种混凝土混合料含有 0%、40% 和 60% GGBFS，每一种含有 50% 和 100% 再生粗骨料 (RCA)。 [4]
reinforced recycled aggregate 增强再生骨料
To study the eccentric compressive performance of basalt-fiber reinforced recycled aggregate concrete-filled square steel tubular stub columns, eight specimens with different replacement ratios of recycled coarse aggregates, basalt fiber dosages, recycled aggregate concrete strength grades, and eccentricities were tested under eccentric static loading. [1] In this research, steel fibre and recycled coarse aggregate (RCA) are used to form a steel-fibre-reinforced recycled aggregate concrete (SFRAC) to improve the recycling and reuse rate of CDW. [2] In order to study the dynamic behaviour and energy dissipation of reinforced recycled aggregate concrete (RAC) beams under impact, four groups of reinforced RAC simply supported beams with various recycled coarse aggregate (RCA) replacement percentages are designed and tested under drop weight impact at the mid-span of beams and corresponding another four groups of beam specimens under static loading. [3]为研究玄武岩纤维增强再生骨料混凝土填充方钢管短柱的偏心抗压性能，对8个不同再生粗骨料替代率、玄武岩纤维用量、再生骨料混凝土强度等级和偏心距的试件进行了偏心静力试验。加载。 [1] 本研究采用钢纤维和再生粗骨料（RCA）组成钢纤维增强再生骨料混凝土（SFRAC），以提高CDW的回收再利用率。 [2] 为了研究钢筋再生骨料混凝土（RAC）梁在冲击作用下的动力性能和能量耗散，设计了四组不同再生粗骨料（RCA）替代百分比的钢筋再生骨料混凝土（RAC）简支梁，并在落锤冲击下进行了试验。梁的跨中和相应的另外四组静载梁试件。 [3]
profile steel ratio
The following main design parameters of columns were considered: recycled coarse aggregate (RCA) replacement percentage, width-thickness ratio of square steel tube, profile steel ratio and RAC strength. [1] The design parameters include recycled coarse aggregate (RCA) replacement percentage, profile steel ratio, slenderness ratio and RAC strength. [2] The design parameters of these columns were recycled coarse aggregate (RA) replacement percentage, diameter–thickness ratio of circular steel tube, profile steel ratio, eccentricity, RAC strength grade, slenderness ratio and section form of profile steel. [3]主要考虑柱子设计参数：再生粗骨料（RCA）置换率、方钢管宽厚比、型钢比和RAC强度。 [1] 设计参数包括再生粗骨料（RCA）替代率、型钢比、长细比和RAC强度。 [2] nan [3]
% 30 %
The main parameters varied in this study are recycled coarse aggregate replacement percentages (0%, 30%, 50%, 70%, and 100%), expansive agent dosages (0%, 8%, and 15%) and an eccentric distance of compressive load from the center of the column (0 and 40 mm). [1] Five grades of replacement ratio of recycled coarse aggregate (0%, 30%, 50%, 70%, 100%) and four groups of stress ratio (−0. [2]本研究中变化的主要参数是再生粗骨料替代百分比（0%、30%、50%、70% 和 100%）、膨胀剂用量（0%、8% 和 15%）和偏心距来自柱中心的压缩载荷（0 和 40 毫米）。 [1] 五级再生粗骨料置换率（0%、30%、50%、70%、100%）和四组应力比（-0. [2]
% 50 % % 50 %
Three beams subjected to long-term loading and chloride attacks, with various recycled coarse aggregate (RCA) replacement ratios of 0%, 50% and 100% respectively, were designed to investigate the effects of the RCA replacement ratio on the flexural behavior and durability properties. [1] Three levels of recycled coarse aggregate (RCA) replacement ratios (0%, 50% and 100%) and two axial load ratios (0. [2]设计了三根经受长期载荷和氯化物侵蚀的梁，各种再生粗骨料 (RCA) 替代率分别为 0%、50% 和 100%，旨在研究 RCA 替代率对弯曲性能和耐久性的影响特性。 [1]