...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Hazardous Materials >Valorization of concrete slurry waste (CSW) and fine incineration bottom ash (IBA) into cold bonded lightweight aggregates (CBLAs): Feasibility and influence of binder types
【24h】

Valorization of concrete slurry waste (CSW) and fine incineration bottom ash (IBA) into cold bonded lightweight aggregates (CBLAs): Feasibility and influence of binder types

机译：将混凝土浆废料（CSW）和细粉焚烧底灰（IBA）转化为冷粘结轻质骨料（CBLA）的可能性：粘合剂类型的可行性和影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this study, concrete slurry waste (CSW) and fine incineration bottom ash (IBA) ( 2.36 mm) were innovatively valorized to produce cold bonded lightweight aggregates (CBLAs) through a pelletizing method. The contribution of CSW to CBLAs as a fresh recycled cementitious paste was investigated and the influences of adding various binders (OPC, GGBS, lime, silica fume) on the properties of CBLAs were explored. Meanwhile, the leaching behaviours of the produced CBLAs were further assessed.The experimental results showed that CSW and IBA had a good compatibility to produce CBLAs by the pelletizing method. The use of fresh and workable CSW collected from ready-mixed concrete plants as a recycled cementitious paste could effectively bond the IBA particles. Due to the residual hydration behaviour of CSW, the produced CBLAs, even without additional binders, had good mechanical properties. The use of small percentages of cement and GGBS as additional binders could significantly increase the strength of CBLAs, while the use of lime and silica fume only showed slight improvement due to the high porosity induced. Moreover, it was found that using GGBS which could react with Ca(OH)(2) in CSW to lower the pH benefited the immobilization of heavy metals in CBLAs.
机译：在这项研究中，对水泥浆废料（CSW）和细粉焚烧底灰（IBA）（<2.36 mm）进行了创新的增值，以通过造粒方法生产冷粘结轻质骨料（CBLA）。研究了CSW作为一种新鲜的再生水泥浆对CBLA的贡献，并探讨了添加各种粘合剂（OPC，GGBS，石灰，硅粉）对CBLA性能的影响。同时，对制得的CBLAs的浸出行为进行了进一步的评价。实验结果表明，CSW和IBA具有良好的相容性，可通过造粒法制备CBLAs。使用从预拌混凝土厂收集的新鲜且可行的CSW作为再生水泥浆可以有效地粘合IBA颗粒。由于CSW的残留水合行为，即使没有其他粘合剂，所生产的CBLA仍具有良好的机械性能。使用少量的水泥和GGBS作为额外的粘合剂可以显着提高CBLA的强度，而石灰和硅粉的使用由于孔隙率高而仅表现出轻微的改善。此外，已发现使用可与CSW中的Ca（OH）（2）反应降低pH的GGBS有利于CBLA中重金属的固定。

著录项

  • 来源
    《Journal of Hazardous Materials》 |2019年第15期|689-697|共9页
  • 作者

    Tang Pei; Xuan Dongxing; Poon Chi Sun; Tsang Daniel C. W.;

  • 作者单位

    Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China;

    Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China;

    Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China;

    Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China;

  • 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

    Concrete slurry waste; Incineration bottom ash; Cold bonded pelletization; Lightweight aggregates;

    机译：混凝土浆废料;焚烧底灰;冷粘结造粒;轻骨料;

相似文献

  • 外文文献
  • 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