• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Frontiers in Microbiology >Mitigation of efflorescence of wallboard by means of bio-mineralization
【2h】

Mitigation of efflorescence of wallboard by means of bio-mineralization

机译：通过生物矿化减轻墙板的风化

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Cement-based material is one of the most versatile and largest amounts of building materials which can not only be used in load-bearing structure but also be used as decoration materials, like brick, wallboard, and tile. However, white calcium carbonate always be found on the surface of wallboard. This phenomenon is generally called efflorescence, which has no damage to wallboard, but has aesthetic impact. In this research, Bacillus mucilaginosus was pre-added to the cement matrix to reduce the efflorescence of wallboard. Image processing, thermogravimetric analysis and permeability test were used to characterize the efflorescence degree of wallboard. The results showed that the bacterium captured atmospheric CO2 by carbonic anhydrase and promoted the CO2to react with Ca(OH)2. This process not only reduced the content of Ca(OH)2 but also improved the compactness of wallboard. In addition, the maximal decrease of efflorescence area of wallboard was gotten when the content of microbial was up to 4% of the mass of cementitious material and the proportion of efflorescence area reduced from 32 ± 3 to 5 ± 1% of the whole area of surface layer. At the same time, the values of compressive and flexural strength were the highest and the surface layer of wallboard was the most compact. The observed reduction of efflorescence was indeed due to the effect of bio-mineralization. This promising method was noted to be cheap, convenient, environment friendly, and which has the potential in various practical applications.
机译：水泥基材料是用途最广，数量最多的建筑材料之一，不仅可以用于承重结构，还可以用作装饰材料，例如砖，墙板和瓷砖。但是，总是在墙板表面发现白色碳酸钙。这种现象通常称为风化，它不会损坏墙板，但会产生美学影响。在这项研究中，将粘液芽孢杆菌预先添加到水泥基质中以减少墙板的风化。利用图像处理，热重分析和渗透性测试来表征墙板的起泡程度。结果表明，细菌通过碳酸酐酶捕获了大气中的二氧化碳，并促进了二氧化碳与Ca（OH）2的反应。该过程不仅降低了Ca（OH）2的含量，而且提高了墙板的致密性。另外，当微生物含量达到胶结材料质量的4％时，墙板的风化面积最大减少，风化面积的比例从32±3降低到5±1％。表层。同时，抗压强度和抗弯强度值最高，墙板的表层最致密。观察到的风化的减少确实是由于生物矿化的影响。人们注意到这种有前途的方法便宜，方便，环境友好，并且在各种实际应用中具有潜力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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