首页> 外文期刊>Environmental Science & Technology >Up-Cycling Waste Glass to Minimal Water Adsorption/Absorption Lightweight Aggregate by Rapid Low Temperature Sintering: Optimization by Dual Process-Mixture Response Surface Methodology
【24h】

Up-Cycling Waste Glass to Minimal Water Adsorption/Absorption Lightweight Aggregate by Rapid Low Temperature Sintering: Optimization by Dual Process-Mixture Response Surface Methodology

机译:通过快速低温烧结将废玻璃循环再生,以最大程度地减少水的吸收/吸收轻质骨料:通过双重工艺混合物响应面方法进行优化

获取原文
获取原文并翻译 | 示例
           

摘要

Mixed color waste glass extracted from municipal solid waste is either not recycled, in which case it is an environmental and financial liability, or it is used in relatively low value applications such as normal weight aggregate. Here, we report on converting it into a novel glass-ceramic lightweight aggregate (LWA), potentially suitable for high added value applications in structural concrete (upcycling). The artificial LWA particles were formed by rapidly sintering (<10 min) waste glass powder with clay mixes using sodium silicate as binder and borate salt as flux. Composition and processing were optimized using response surface methodology (RSM) modeling, and specifically (ⅰ) a combined process-mixture dual RSM, and (ⅱ) multiobjective optimization functions. The optimization considered raw materials and energy costs. Mineralogical and physical transformations occur during sintering and a cellular vesicular glass-ceramic composite microstructure is formed, with strong correlations existing between bloating/shrinkage during sintering, density and water adsorption/absorption. The diametrical expansion could be effectively modeled via the RSM and controlled to meet a wide range of specifications; here we optimized for LWA structural concrete. The optimally designed LWA is sintered in comparatively low temperatures (825-835 ℃), thus potentially saving costs and lowering emissions; it had exceptionally low water adsorption/ absorption (6.1-7.296 w/w_d; optimization target: 1.5-7.5% w/w_d); while remaining substantially lightweight (density: 1.24-1.28 g.cm~(-3); target: 0.9-1.3 g.cm~(-3)). This is a considerable advancement for designing effective environmentally friendly lightweight concrete constructions, and boosting resource efficiency of waste glass flows.
机译:从城市固体废物中提取的混合色废玻璃要么不回收,在这种情况下是对环境和经济的责任,或者将其用于价值相对较低的应用中,例如正常重量的骨料。在这里,我们报告将其转换为新型的玻璃陶瓷轻质骨料(LWA),可能适用于结构混凝土的高附加值应用(再造)。人造LWA粒子是通过将硅酸钠作为粘合剂,硼酸盐作为助熔剂,将粘土混合物与粘土混合物快速烧结(<10分钟)而形成的。使用响应表面方法(RSM)建模,特别是(ⅰ)组合的过程混合双重RSM和(ⅱ)多目标优化功能,对成分和工艺进行了优化。优化考虑了原材料和能源成本。烧结过程中发生矿物学和物理转变,并形成了蜂窝状的囊泡状玻璃陶瓷复合材料的微结构,在烧结过程中的膨胀/收缩,密度与水的吸收/吸收之间存在着很强的相关性。直径扩展可以通过RSM进行有效建模,并进行控制以满足各种规格要求;在这里,我们针对LWA结构混凝土进行了优化。优化设计的LWA在相对较低的温度(825-835℃)下进行烧结,从而有可能节省成本并降低排放;它的吸水率/吸水率极低(6.1-7.296 w / w_d;优化目标:1.5-7.5%w / w_d);同时保持基本轻质(密度:1.24-1.28 g.cm〜(-3);目标:0.9-1.3 g.cm〜(-3))。对于设计有效的环保轻质混凝土结构并提高废玻璃流的资源效率,这是一项重大进步。

著录项

  • 来源
    《Environmental Science & Technology》 |2014年第13期|7527-7535|共9页
  • 作者单位

    Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K.,School of Civil Engineering, University of Leeds, Leeds LS2 9JT, U.K.;

    Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K.;

    Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K.;

    Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD, U.K.;

    Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstr. 6 91058, Erlangen, Germany;

    Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K.;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号