...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials and structures >Alkali silica reaction of waste glass aggregate in alkali activated fly ash and GGBFS mortars
【24h】

Alkali silica reaction of waste glass aggregate in alkali activated fly ash and GGBFS mortars

机译：废玻璃骨料在碱活化粉煤灰和GGBFS砂浆中的碱硅酸反应

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper evaluates the alkali silica reaction (ASR) susceptibility of waste glass aggregate in alkali activated fly ash and ground granulated blast furnace slag (GGBFS) mortars as compared to that in ordinary Portland cement (OPC) mortars. In accelerated mortar bar tests, glass fine aggregate showed much lower expansions in alkali activated fly ash and GGBFS blended mortars than in OPC mortars or alkali activated neat fly ash or GGBFS mortars. Glass aggregate was classified as non-reactive with alkali activated fly ash and GGBFS blends according to 10-day and 21-day expansion limits of the Australian Standard. Microstructural studies revealed that glass aggregate produced typical ASR products in OPC mortars and alkali activated neat GGBFS mortars due to the presence of high calcium. However, alkali activated fly ash and GGBFS blended mortars produced reaction products of low Ca/Si and high Al/Si ratios that reduced the dissolution of reactive silica present in glass aggregate causing less expansions. The observed expansion of the alkali activated neat fly ash mortar is attributed to the analcime phase found in the X-Ray diffraction of this mortar.
机译：与普通硅酸盐水泥（OPC）砂浆相比，本文评估了碱活化粉煤灰和磨碎的高炉矿渣（GGBFS）砂浆中废玻璃骨料的碱二氧化硅反应（ASR）敏感性。在加速砂浆棒试验中，与OPC砂浆或碱活化纯粉煤灰或GGBFS砂浆相比，玻璃细骨料在碱活化粉煤灰和GGBFS混合砂浆中的膨胀率低得多。根据澳大利亚标准的10天和21天膨胀极限，玻璃骨料与碱活化的粉煤灰和GGBFS混合物不反应。微观结构研究表明，由于存在高钙，玻璃骨料在OPC砂浆和碱活化的纯GGBFS砂浆中产生了典型的ASR产品。但是，碱活化的粉煤灰和GGBFS混合砂浆产生的Ca / Si低和Al / Si高的反应产物减少了玻璃骨料中反应性二氧化硅的溶解，从而导致较少的膨胀。观察到的碱活化的纯粉煤灰砂浆的膨胀归因于在该砂浆的X射线衍射中发现的analcime相。

著录项

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