• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Engineering and Performance >Sulfate Attack of Cement-Based Material with Limestone Filler Exposed to Different Environments
【24h】

Sulfate Attack of Cement-Based Material with Limestone Filler Exposed to Different Environments

机译：石灰石填料对水泥基材料硫酸盐侵蚀的影响

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

Mortar prisms made with OPC cement plus 30% mass of limestone filler were stored in various sulfate solutions at different temperatures for periods of up to 1 year, the visual appearance was inspected at intervals, and the flexural and compressive strength development with immersion time was measured according to the Chinese standard GB/T17671-1999. Samples were selected from the surface of prisms after 1 year immersion and examined by x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), laser-raman spectroscopy and scanning electron microscopy (SEM). The results show that MgSO{sub}4 solution is more aggressive than Na{sub}2SO{sub}4 solution, and Mg{sup}(2+) ions reinforce the thaumasite sulfate attack on the limestone filler cement mortars. The increase of solution temperature accelerates both magnesium attack and sulfate attack on the limestone filler cement mortar, and leads to more deleterious products including gypsum, ettringite and brucite formed on the surface of mortars after 1 year storage in sulfate solutions. Thaumasite forms in the mortars containing limestone filler after exposure to sulfate solutions at both 5 ℃ and 20 ℃. It reveals that the thaumasite form of sulfate attack is not limited to low-temperature conditions.
机译：用OPC水泥加30％质量的石灰石填料制成的砂浆棱镜在不同的硫酸盐溶液中于不同温度下存放长达1年，每隔一段时间检查外观，并测量随浸泡时间的弯曲和抗压强度发展情况根据中国标准GB / T17671-1999。浸泡一年后从棱镜表面选择样品，并通过X射线衍射（XRD），傅里叶变换红外光谱（FTIR），激光拉曼光谱和扫描电子显微镜（SEM）进行检查。结果表明，MgSO {sub} 4溶液比Na {sub} 2SO {sub} 4溶液更具腐蚀性，并且Mg {sup}（2+）离子增强了硫酸高硫硫酸盐对石灰石填充水泥砂浆的侵蚀。溶液温度的升高加速了石灰石填充水泥砂浆的镁侵蚀和硫酸盐侵蚀，并导致在硫酸盐溶液中储存1年后，砂浆表面形成的石膏，钙矾石和水镁石等有害产品增多。在5℃和20℃的硫酸盐溶液中暴露后，含有石灰石填料的砂浆中会形成陶铝石。它表明硫酸盐侵蚀的硫铝矾形式不限于低温条件。

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