Comparison of different methods for activation of ordinary Portland cement-slag mortars.pdfVIP

下载本文档

4
0
约 9页
2017-04-13 发布于江苏
举报
版权申诉

Comparison of different methods for activation of ordinary Portland cement-slag mortars.pdf

1、本文档共9页，可阅读全部内容。
2、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。
3、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
5、该文档为VIP文档，如果想要下载，成为VIP会员后，下载免费。
6、成为VIP后，下载本文档将扣除1次下载权益。下载后，不支持退款、换文档。如有疑问请联系我们。
7、成为VIP后，您将拥有八大权益，权益包括：VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
8、VIP文档为合作方或网友上传，每下载1次，网站将根据用户上传文档的质量评分、类型等，对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档

Comparison of different methods for activation of ordinary Portland cement-slag mortars

Construction and Building Materials 25 (2011) 30–38Contents lists available at ScienceDirect Construction and Building Materials journal homepage: www.elsevier .com/locate /conbui ldmatComparison of different methods for activation of ordinary Portland cement-slag mortars Fathollah Sajedi *, Hashim Abdul Razak Department of Civil Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia a r t i c l e i n f o a b s t r a c tArticle history: Received 12 February 2010 Received in revised form 13 May 2010 Accepted 19 June 2010 Available online 16 July 2010 Keywords: OSM Grinding Thermal treatment Chemical activators Early strength Strength loss0950-0618/$ - see front matter 2010 Elsevier Ltd. A doi:10.1016/j.conbuildmat.2010.06.060 * Corresponding author. Tel.: +60 17 3293 252. E-mail address: f_sajedi@ (F. Sajedi).This paper compares three methods for activation of OPC-slag mortars (OSM): (1) prolonged grinding of binders (mechanical method), (2) elevated temperature curing of mortars (thermal method), and (3) use of chemical activators such as NaOH, KOH, and Na2SiO3, 9.35H2O (chemical method). The proper reactiv- ity of OSM was evaluated using a mixture of 50% OPC and 50% slag. Early and ultimate strengths were compared. All three activation methods accelerated both the slag reaction and strength development rates. However, the chemical method did not show a significant effect on the ultimate strength, while thermal activation increased the early strength by 3 days. Mechanical activation increased the early strengths of the mortar significantly, but about 6% strength loss occurred in the ultimate strength. Although, the application of mechanical and thermal activation methods needs extra equipment and energy, due to more significant of strength improvement; based on current test results, it can be said that mechanical activation is the most efficient and feasible method for the activation of OSMs. 2010 Elsevier Ltd. All rights reserved.1. Introduction In thi