Dehydration Process of Calcium Silicate Hydrate during Heating in the Air

被引：4

作者：

Lu, Linnu ^{[1
]}

Yu, Shumei ^{[2
]}

He, Yongjia ^{[2
]}

Hu, Shuguang ^{[2
]}

机构：

[1] Wuhan Univ Technol, Sch Sci, Wuhan 430070, Peoples R China

[2] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan, Peoples R China

来源：

APPLICATIONS OF ENGINEERING MATERIALS, PTS 1-4 | 2011年 / 287-290卷

基金：

中国国家自然科学基金;

关键词：

dehydration; calcium silicate hydrate; C-S-H; heating; beta-C2S; TEMPERATURES; SYNCHROTRON; KINETICS;

D O I：

10.4028/www.scientific.net/AMR.287-290.785

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Investigation on the continuous dehydration process of calcium silicate hydrate with C/S 1.5 during heating in the air was carried out. Results showed that the heating at 200 degrees C of C-S-H resulted in decreasing basal spacing from 1.2 nm to 1.0 nm, and the basal spacing disappeared as the temperature raised to 400 degrees C. Small amount of the dehydrated calcium silicate hydrate, portlandite and calcite were detectable in the heated sample at 400 degrees C. The phases in the samples heated at 500 degrees C and 650 degrees C are beta-C2S, quartz, and calcite. At 800 degrees C and 900 degrees C, alpha'-C2S, beta-C2S, and quartz are main phases in the heated sample.

引用

页码：785 / +

页数：2

共 8 条

[1] Dehydration and rehydration processes of cement paste exposed to high temperature environments [J].

Alonso, C ;

Fernandez, L .

JOURNAL OF MATERIALS SCIENCE, 2004, 39 (09) :3015-3024

[2]

Gmira A., STUD SURF SCI CATAL, V144, P601

[3]

Lu Linnu, 2008, Journal of the Chinese Ceramic Society, V36, P1343

[4]

Peng GF, 2001, ADV CEM RES, V13, P47

[5] Dehydration/recrystallization mechanisms, energetics, and kinetics of hydrated calcium silicate minerals: an in situ TGA/DSC and synchrotron radiation SAXS/WAXS study [J].

Shaw, S ;

Henderson, CMB ;

Komanschek, BU .

CHEMICAL GEOLOGY, 2000, 167 (1-2) :141-159

[6] Hydrothermal formation of the calcium silicate hydrates, tobermorite (Ca5Si6O16(OH)2•4H2O) and xonotlite (Ca6Si6O17(OH)2):: an in situ synchrotron study [J].

Shaw, S ;

Clark, SM ;

Henderson, CMB .

CHEMICAL GEOLOGY, 2000, 167 (1-2) :129-140

[7]

Smith P., 1994, ASTM STP C, V169C, P282

[8] ANALYTICAL STUDY OF PURE AND EXTENDED PORTLAND-CEMENT PASTES .1. PURE PORTLAND-CEMENT PASTES [J].

TAYLOR, HFW ;

MOHAN, K ;

MOIR, GK .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1985, 68 (12) :680-685

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