CAS OpenIR  > 湿法冶金清洁生产技术国家工程实验室
Synthesis of Calcium Silicate Hydrate in Highly Alkaline System
Zhu, Ganyu1,2; Li, Huiquan1; Wang, Xingrui1; Li, Shaopeng1; Hou, Xinjuan1; Wu, Wenfen1,2; Tang, Qing1
2016-08-01
Source PublicationJOURNAL OF THE AMERICAN CERAMIC SOCIETY
ISSN0002-7820
Volume99Issue:8Pages:2778-2785
Abstract

Synthesis of calcium silicate hydrate (C-S-H) was conducted over the range of 50 degrees C-90 degrees C and C/S ratio of 0.86-2.14 in the highly alkaline Na2O-CaO-SiO2-H2O system for silicon utilization in high alumina fly ash. Structural change in C-S-H formed in the highly alkaline system was investigated using XRD and Si-29 MAS NMR spectra. X-ray photoelectron spectroscopy was used to confirm the amount of sodium ions in C-S-H. Conversion of Si may reach 99% under optimum conditions. A higher degree of polymerization of silicate was obtained at lower temperature and C/S ratio. Na+ was confirmed to exist as Na-OSi and Na-OH. The amount of Na+ is the least at C/S ratio of 1.43, which conform to the prediction of topological constraint theory. High Ca/Si ratio leads to the increasing in Na+ combined in the interlayer. Increasing in the Na+ concentration in the system also increases the amount of Na+ combined in the interlayer and reduces the polymerization. Ion exchange was proven to be an effective way to remove Na+ combined in the interlayer of C-S-H.

KeywordCalcium Silicate Hydrate Alkaline System Sodium Ion Exchange High Alumina Fly Ash
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1111/jace.14242
Indexed BySCI
Language英语
WOS KeywordC-S-H ; COAL FLY-ASH ; TRICALCIUM SILICATE ; NEUTRON-SCATTERING ; PORTLAND-CEMENT ; SODIUM-SILICATE ; ALUMINA ; PASTES ; WATER ; SLAG
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
Funding OrganizationNational Natural Science Foundation of China(51304184) ; Coal Based Key Scientific and Technological Project of Shanxi Province(MC2014-06)
WOS IDWOS:000386573200032
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21580
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhu, Ganyu,Li, Huiquan,Wang, Xingrui,et al. Synthesis of Calcium Silicate Hydrate in Highly Alkaline System[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2016,99(8):2778-2785.
APA Zhu, Ganyu.,Li, Huiquan.,Wang, Xingrui.,Li, Shaopeng.,Hou, Xinjuan.,...&Tang, Qing.(2016).Synthesis of Calcium Silicate Hydrate in Highly Alkaline System.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,99(8),2778-2785.
MLA Zhu, Ganyu,et al."Synthesis of Calcium Silicate Hydrate in Highly Alkaline System".JOURNAL OF THE AMERICAN CERAMIC SOCIETY 99.8(2016):2778-2785.
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