A series of investigations on the mechanical property, durability, and the structural performance of recycled aggregate concrete (RAC) have been carried out in …
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Junliang Zhao Tao Yu J. Teng. Engineering, Materials Science. 2015. AbstractA large amount of research has been conducted on recycled aggregate concrete (RAC) due to its social, environmental, and economic significance. However, the in situ application of RAC has so…. Expand.
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Concrete is one of the most widely used engineering materials, which plays a critical role in determining the quality and speed of reef construction. However, there are limited or no supplies of sand, stone and fresh water on the reefs and islands of the South China Sea, which makes it impossible to satisfy the demand for concrete materials for ...
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Abstract. A series of investigations on the mechanical property, durability, and the structural performance of recycled aggregate concrete (RAC) have been carried out in the past 15 years (1996–2011) in China. The achievements of researches on recycled concrete are relatively sufficient to review and share with investigators from other countries.
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The global construction aggregates market size was valued at $375.3 billion in 2021, and is projected to reach $667.8 billion by 2032, growing at a CAGR of 5.2% from 2023 to 2032. Aggregate is the most mined granular product in the world. It is the basic component of composite materials such as concrete and asphalt concrete.
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This study was designed to investigate the recent movement and current stage of China's construction and demolition (C&D) waste recycling and reuse. ... Since natural aggregate concrete made ...
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This standard specifies the very soil mixed with recycled coarse aggregate terms and definitions, classification and specifications, requirements, test methods, inspection rules, signs, storage and transport. This standard applies to the preparation of recycled coarse aggregate concrete. GB/T25177-2010 Chinese standards related in …
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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 …
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China's demand for Cement, Concrete & Aggregate will continue to grow at about 8% by 2032. China's demand for Cement, Concrete & Aggregate has grown at a fast pace in the past decade. In the next decade, both production and demand will continue to grow. The Chinese economy maintains a high speed growth which has been stimulated by the ...
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The use of recycled aggregate in China has been limited to road construction and production of non-structural concrete. In order to stimulate the use of …
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1. Introduction1.1. Issues of aggregate resource use. Sand, gravel, and crushed stone are collectively referred to as construction aggregates. If calculated by weight, aggregates are the most extracted and used material by humans (OECD, 2019; Robinson Jr and Brown, 2002; Torres et al., 2021).In recent years, the total volume of …
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1. Introduction. The construction sector is responsible for approximately 6 billion tons of CO 2 emissions [1].Furthermore, the demand for raw material as aggregate for concrete is around 2.7 billion tons/year in EU countries altogether [2], 900 million tons/year in the USA [3], and 700 million tons/year in Brazil [4].Besides, at the end of the …
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Since China hosted the Olympic Games in 2008, a mass of construction and demolition (C&D) wastes were produced with the rapid urbanization construction. …
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Fine aggregate commonly known as sand is an inert material widely used for construction works. From concrete production to mortar, asphalt, and even the creation of glass and bricks, sand's unique properties make …
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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 ...
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This paper studies the potential environmental impact of recycled coarse aggregate (RCA) for concrete production in China. According to the cradle-to-cradle theory, a closed-loop life cycle ...
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Because of these hindrances, the market uptake of recycled aggregates (RA) by the concrete industry is quite limited. As presented in the 2019–2020 annual review of UEPG (the European Aggregates Association) [], only 10.6% of all aggregates produced in the EU + EFTA (the European Free Trade Association) were RA, most of which were …
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In 2010, Ministry of Construction of China formulated a firmer engineering industry standard "JGJ 206: ... When incorporating into a European standard, new concrete aggregate standard BS EN 12620 [19] still does not limit the values of shell content in fine aggregates. Simultaneously, it uses three categories for coarse aggregates in terms of ...
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1. Introduction1.1. Issues of aggregate resource use. Sand, gravel, and crushed stone are collectively referred to as construction aggregates. If calculated by …
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Since China hosted the Olympic Games in 2008, a mass of construction and demolition (C&D) wastes were produced with the rapid urbanization construction. Recycling the C&D waste into recycled aggregates (RA) is an effective method for reducing the amount of C&D wastes. Many studies on the properties of RA and the …
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The whole life cycle of concrete covers the manufacture of materials (cement, sand, NAs and RCAs), transportation, concrete mixing, construction, service and demolition. ... A closed-loop life cycle assessment of recycled aggregate concrete utilization in China. Waste Manag., 56 (2016), pp. 367-375, …
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This article assesses the water based durability properties of concrete containing bone china ceramic fine aggregates (BCCFA). For this study, BCCFA was utilised as 0%, 20%, 40%, 60%, 80% and partial replacement of fine aggregate. The hydration products were assessed by X-ray photoelectron spectroscopy.
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To explore the effect of curing mechanism on the mechanical properties and sulfuric acid corrosion resistance of the geopolymer recycled aggregate concrete (GRAC), the specimens were cured at high temperature (60°C, 80°C) for 6 h, 24 h and 48 h respectively, and then lasted up to 7 d at room temperature. After the curing period was …
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Aggregate. Definition: granular material, such as sand, gravel, crushed stone, crushed hydraulic-cement concrete, or iron blast-furnace slag, used with a cementing medium to produce either concrete or mortar.-. ACI Concrete Terminology. Aggregates are the major constituent (ingredient) in concrete, making up 60% to 70% of the volume …
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The average compressive strength of concrete cubes specimens of size 150 × 150 × 150 mm is tested with BCW for different design mixes for 7 and 28 days. 3.2.1. Effect of BCW on Compressive Strength of Concrete. The design mix proportions of 0, 20, 40, 60, 80, and were evaluated to optimize BCW as a fine aggregate.
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This paper studies the potential environmental impact of recycled coarse aggregate (RCA) for concrete production in China. According to the cradle-to-cradle …
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This paper discusses the suitability of producing concrete with 100 % recycled aggregate to meet durability and strength requirements for different applications. Aggregate strength, gradation, absorption, specific gravity, shape and texture are some of the physical and mechanical characteristics that contribute to the strength and durability …
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STANDARDS, PRACTICES and MANUALS ON AGGREGATES FOR CONCRETE. ACI CODE-318-19 (22): Building Code Requirements for Structural Concrete and Commentary (Reapproved 2022) ACI PRC-221-96: Guide for Use of Normal Weight and Heavyweight Aggregates in Concrete (Reapproved 2001) ACI PRC-225.1-20: Removal …
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These different properties of aggregate allow designers and contractors the most flexibility to meet their design and construction requirements. References 1. Mehta and Monteiro. (1993) Concrete Structure, Properties, and Materials, Prentice-Hall, Inc., Englewood Cliffs, NJ. Mindess and Young (1981) Concrete, Prentice-Hall, Inc., Englewood ...
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One potential source of CaO is the fine-grained material generated by crushing concrete for recycling aggregate 64; however, as the volume of new construction is greater than the volume of ...
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