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首页> 外文期刊>Construction and Building Materials >Normal- and high-strength concretes incorporating air-cooled blast furnace slag coarse aggregates: Effect of slag size and content on the behavior
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Normal- and high-strength concretes incorporating air-cooled blast furnace slag coarse aggregates: Effect of slag size and content on the behavior

机译：掺入风冷高炉矿渣粗骨料的中，高强度混凝土：矿渣尺寸和含量对性能的影响

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Over the past two decades, air-cooled blast furnace slag aggregates have been considered as an alternative coarse aggregate material in concrete toward attaining resource sustainability in the construction industry. It is now recognized that the application of slag aggregates to form recycled slag aggregate concrete (SAC) is a highly promising technology to reduce environmental impact of both the slag waste and concrete. This paper presents the first experimental study on mechanical properties of SAC prepared with coarse slag aggregates of different sizes. Normal- and high-strength SACs were manufactured with two different grades of slag aggregates. Tests were undertaken to establish the compressive strength, elastic modulus, splitting tensile strength, workability, and fresh and hardened density of each batch. The results show that the investigated mechanical properties of concretes with larger slag aggregates are higher than those of the companion mixes with smaller aggregates. Results also show that the mechanical properties of SACs decrease with an increase in the slag aggregate content. Although it has been shown that SACs exhibit inferior properties compared to those of natural aggregate concretes, this difference is not excessive in normal-strength SACs with up to 100% slag aggregates and high-strength SACs with up to 50% slag aggregates, suggesting that the technique investigated in this study can provide an attractive avenue for value-added use of air-cooled blast furnace slag. (C) 2016 Elsevier Ltd. All rights reserved.
机译：在过去的二十年中，风冷的高炉矿渣骨料被认为是混凝土中替代粗骨料的材料，以实现建筑行业的资源可持续性。现在已经认识到，将矿渣骨料用于形成再生矿渣骨料混凝土（SAC）是减少矿渣和混凝土对环境的影响的极有前途的技术。本文介绍了用不同尺寸的粗渣骨料制备的SAC的力学性能的第一项实验研究。用两种不同等级的矿渣骨料制造普通和高强度SAC。进行测试以建立每批的抗压强度，弹性模量，抗张强度，可加工性以及新鲜和硬化密度。结果表明，矿渣骨料较大的混凝土的力学性能要高于骨料较小的混凝土。结果还表明，SAC的机械性能随着炉渣骨料含量的增加而降低。尽管已经显示出SAC与天然骨料混凝土相比性能较差，但在矿渣骨料含量最高为100％的普通强度SAC和矿渣骨料含量最高为50％的高强度SAC中，这种差异并不过分，这表明在这项研究中研究的技术可以为风冷高炉矿渣的增值利用提供有吸引力的途径。 （C）2016 Elsevier Ltd.保留所有权利。

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