硅酸盐通报2018，Vol.37Issue(5)：1515-1519,5.
弱碱硫酸盐侵蚀下水泥石产物二水石膏相的研究
Dihydrate Gypsum Phase of Cement Paste under the Sulfate Attacking in Weak Alkaline
摘要
Abstract
Hardened cement paste immersed in sodium sulfate and weak alkaline solution for 210 d had been investigated.The as-prepared samples were characterized by X -ray diffraction (XRD), scanning electron microscopy(SEM) and energy dispersive spectrometer(EDS).The contents of dihydrate gypsum which cement paste samples immersed in 0％, 5％ and 10％ Na2 SO4 solution were calculated by using K value in X-ray diffraction ( XRD), the contents of free and total sulfate ion in the samples were determined by spectrophotometry .The results showed that the contents of dihydrate gypsum in the samples increased significantly with the increase of Na 2 SO4 concentration in the attack solution, the contents of dihydrate gypsum that samples immersed in the 5％ and 10％ Na2 SO4 solution were 3.291％and 3.957％, respectively.It was found that there was obvious dihydrate gypsum in the sample which soaked in 10％ Na2 SO4 solution.We found that samples had a "high sulfur distribution"on the near surface by Line scan mode in EDS.It was found by spectrophotometry that the free sulfate ion content of the samples immersed in 5％ and 10％ Na2 SO4 solution was 81 times and 85 times of that of the sample immersed in water, respectively.关键词
弱碱/硫酸盐侵蚀/二水石膏/K值法/线扫描Key words
weak alkaline/sulfate attack/dihydrate gypsum/K value/line scan分类
通用工业技术引用本文复制引用
杨旭光,李燕,孙道胜,刘开伟,王爱国..弱碱硫酸盐侵蚀下水泥石产物二水石膏相的研究[J].硅酸盐通报,2018,37(5):1515-1519,5.基金项目
国家自然科学基金(51578004,51608004) （51578004,51608004）
安徽省高校自然科学基金(KJ2016A818) （KJ2016A818）
