牌号. 35B2. 欧标钢号. 1.5511. 对应标准. EN 10269-2013. 规定高温和/或低温性能的紧固件用钢和镍合金. Steels and nickel alloys for fasteners with specified elevated and/or low The key words such as recycled aggregate, recycled aggregate concrete, construction and demolition wastes, mechanical properties of recycled aggregate A Comprehensive Review on Recycled Aggregate and
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This chapter deals with the suitability of recycled aggregate concrete for structural applications, with emphasis on coarse recycled aggregates produced from This study proposes a new mix design method for C30 recycled concrete using recycled aggregate crushed from different strength source concrete (SC). The New Mix Design Method for Recycled Concrete Using Mixed
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35B2 欧标钢号 1.5511 对应标准 EN 10269-2006 规定高温和/或低温性能的紧固件用钢和镍合金 Steels and nickel alloys for fasteners with specified elevated and/or low temperature Abstract. This paper investigates the mechanical and micro-interfacial properties of recycled concrete. Concrete specimens with recycled brick coarse Numerical and Experimental Investigation of Recycled Brick
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Since the recycled aggregate has different properties than NA, it behaves differently in concrete mixes and causes the finished concrete to perform unlike Geopolymer concrete (GC) has the potential to incorporate recycled concrete aggregates (RCA) obtained from construction and demolition waste. This A State-of-the-Art Review on the Incorporation of Recycled Concrete
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31 行Recycled concrete was produced by six different contaminated construction materials. Coir fiber was added to stabilize the heavy metals in the concrete. The coir In this research work, two types of recycled aggregates were used: (1) the recycled concrete aggregate, RCA, obtained by crushing the parent concrete produced using limestone cement and (2) the How the Carbonation Treatment of Different
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The method is based on considering the concrete recycled aggregate as a two phase material, the old natural aggregate and the old mortar, and taken the old mortar as a part of the total mortar content of the new concrete. The key to the system is to design a reference concrete with natural aggregate, having the desired compressive strength The study aims to investigate the feasibility of using recycled aggregate (RA) and recovered fibers (RFs) obtained from recycling polypropylene fiber-reinforced concrete (PPFRC) in new concrete Recycling of Macro-Synthetic Fiber-Reinforced
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Because the original cement mortar attached on NA is more porous than NA. RCA have higher porosity and water absorption, and lower strength compared with NA. The water absorption of RCA ranges 3–12% compared with 1–5% for NA (Gómez-Soberón, 2002, Katz, 2003). The density and absorption of RCA depend upon the W/C ratio of the The huge increase in production of construction and demolition waste (CDW) worldwide is leading to the valorisation of as recycled aggregates. One of the most promising alternatives is its use as a recycled aggregate in the manufacture of structural concrete, which motivates the study of the dynamic behaviour of these materials in order Resonance Fatigue Behaviour of Concretes with Recycled Cement
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The German Committee for Structural Concrete guideline, for example, prescribes a limit on the proportion of recycled aggregate at 45%. In 2006, material tests in Switzerland showed, however, thatAn increasing amount of construction and demolishing waste has made the implementation of recycled concrete aggregate (RCA) a popular topic; RCA can reduce the environmental pollution caused by the construction industry. This paper describes differences in physical, mechanical, and chemical properties between RCA and natural Buildings Free Full-Text A Review of Improvement of
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Spiral hoops can effectively enhance the load-bearing capacity of recycled aggregate concrete columns, and the mechanical performance of such a member after experiencing fire and a fire sprinkler is very important for its application and promotion. Aiming at this problem, the mechanical behavior of spiral reinforcement recycled This paper reviews specific technical and eco-efficiency performance issues in using glass waste as an aggregate in the production of concrete. Eco-efficiency is a relatively modern tool in the pursuit of sustainability. Eco-efficiency is the concept of maximising the benefits from the use of non-renewable resources while minimising the Eco-Efficiency Assessment Utilizing Recycled Glass Aggregate in Concrete
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In this study, the impact of steel fibres and Silica Fume (SF) on the mechanical properties of recycled aggregate concretes made of two different types of Recycled Coarse Aggregates (RCA) sourced from both low- and high-strength concretes were evaluated through conducting 60 compressive strength tests. The RCAs were used The properties of cement concrete using waste materials—namely, recycled cement mortar, fly ash–slag, and recycled concrete aggregate—are presented. A treatment process for waste The Performance of Concrete Made with
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35B2 1.5511 +QT d≤60 289 270 251 229 213 192 182 173 60<d≤150 287 264 242 220 203 186 167 147 符合本欧洲标准的产品热处理指南 Material designation Heat-treatment symbol Normalizing,quenching or solution annealing temperature °C Type ofFor various decades, concrete recycling studies have mainly addressed its use as coarse and fine aggregates as well as low-activity filler additions [].In recent years, the attention has shifted towards the production of recycled cement (RC) with rehydration capacity through thermal activation [1,4].In this still relatively unexplored domain, studies Mechanical Characterisation and Shrinkage of Thermoactivated Recycled
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The preparation of recycled concrete aggregate generates a lot of fines, which are obstacles for implementing the recycled concrete aggregate. In this work, carbonation treatment is applied to improve the properties of recycled concrete fine, and the influences of carbonated recycled concrete fine (CRCF) on cement hydration process are Wu et al. [] proposed a new method by crushing demolished concrete into large pieces of concrete lumps (referred to as recycled concrete lumps or RCLs) for directly mixing with fresh concrete (FC) (Fig. 1) to produce the so-called compound concrete [].This novel recycling method has many advantages over traditional recycling methods such as: Concrete Filled FRP Tubular Columns Containing Recycled Concrete
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Kou et al. ( Kou and Poon, 2013) investigated the long-term properties (up to ten years) of the outdoor exposed RAC consisting recycled concrete aggregate and fly ash as partial replacement of aggregate and cement, respectively. Four replacement ratios of FA to cement in weight, i.e. 0%, 25%, 35% and 55% were considered.Economic and environmental factors call for increased resource productivity. Partial or full replacement of Portland cement by wastes and by-products, and natural aggregates by construction and demolition wastes, are two prominent routes of achieving circular economy in construction and related industries. Municipal solid waste Sustainability Free Full-Text Properties of Concrete with Recycled
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Numerous experimental and theoretical studies on recycled aggregate concrete have been carried out in China in the past 10 years. This paper provides a comprehensive review of the related findings of research on the mechanical properties of RAC in China. The influences of the RCA on the strength and deformation characteristics This paper investigates the mechanical and micro-interfacial properties of recycled concrete. Concrete specimens with recycled brick coarse aggregate (RBCA) admixtures of 0%, 25%, 50%, 75%, and 100% were prepared. Apparent density, slump, and mechanical tests were carried out to evaluate the properties and behavior of the recycled Numerical and Experimental Investigation of Recycled Brick
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This paper presents the mechanical properties of 100% recycled aggregate concrete (RAC), and the results and analysis of the dry–wet cycle accelerated sulfate attack test. The results show that recycled concrete aggregate (RCA) can replace the coarse and fine aggregate. The recycled clay brick aggregate (RCBA) is not suitable for
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