维普中文期刊产品整合服务

The pH of Cement-based Materials:A Review

查看全文 作　　者：Sumra [1,2]Yousuf;Payam [3,4]Shafigh;Zainah [1]Ibrahim 高影响力作者 机构地区：[1]Department of Civil Engineering,Faculty of Engineering,University of Malaya,50603 Kuala Lumpur,Malaysia;[2]Department of Building and Architectural Engineering,Faculty of Engineering&Technology,Bahauddin Zakariya University,Multan 60000,Pakistan;[3]Department of Building Surveying,Faculty of Built Environment,University of Malaya.50603 Kuala Lumpur,Malaysia;[4]Center for Building,Construction&Tropical Architecture(BuCTA),Faculty of Built Environment,University of Malaya,50603 Kuala Lumpur,Malaysia高影响力机构 出　　处：《Journal of Wuhan University of Technology(Materials Science)》索引2020年第35卷第5期,共17页高影响力期刊 基　　金：Funded by University of Malaya (No.GPF015A-2018)。 摘　　要：Cement-based materials (CBMs),such as paste,mortar and concrete,are highly alkaline with an initial high pH of approximately 12.0 to 13.8.CBMs have a high pH due to the existing oxide mineral portlandite and alkali metal contents in Portland cement.The high pH of concrete provides excellent protection and reinforces the steel bars against corrosion.The pH of concrete does not remain constant due to ageing and other defect-causing factors,such as chloride ingress,alkali leaching,carbonation,corrosion,acid attack,moisture and biodegradation process.Reducing the concrete pH has negative impact on the strength,durability and service life of concrete buildings.However,the high pH of concrete may also cause concrete structure deterioration,such as alkali silica reaction,porosity and moisture related damages in concrete structures.The pH of CBMs can be influenced by high temperatures.For instance,the extremely high volume (85%-100%) of slag-blended cement pastes shows considerable pH reduction from 12.80 to 11.34 at 800 ℃.As many concrete structure deterioration are related to concrete pH,using an accurate and reliable method to measure pH and analyse the durability of reinforced concrete structure based on pH values is extremely important.This study is a comprehensive review of the pH of CBM in terms of measurement,limitations and varying values for different CBM types. 关 键 词：PH cementitious materials CONCRETE portlandite DURABILITY CORROSION ALKALI
相关文献

参考文献(130)

引证文献(4)

耦合文献(35)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费