Effect of C/S Ratio on Morphology and Structure of Hydrothermally Synthesized Calcium Silicate Hydrate

武汉理工大学学报-材料科学版(英文版), 2011, 26(4): 770-773. doi: 10.1007/s11595-011-0308-z

^1, , ^2, , ^3, , ^4, , ^5,

1.Key Laboratory for Silicate Materials Science and Engineering Wuhan University of Technology,Wuhan,430070,China;Department of Civil and Environmental Engineering,University of Illinois at Urbana-Champaign,Urbana,IL61801,USA

2.Key Laboratory for Silicate Materials Science and Engineering Wuhan University of Technology,Wuhan,430070,China

3.Department of Civil and Environmental Engineering,University of Illinois at Urbana-Champaign,Urbana,IL61801,USA;School of Science,Wuhan University of Technology,Wuhan,430070,China

4.Department of Civil and Environmental Engineering,University of Illinois at Urbana-Champaign,Urbana,IL61801,USA

5.Key Laboratory for Silicate Materials Science and Engineering Wuhan University of Technology,Wuhan,430070,China

Effect of C/S Ratio on Morphology and Structure of Hydrothermally Synthesized Calcium Silicate Hydrate

HE Yongjia ^1, , ZHAO Xiaogang ^2, , LU Linnu ^3, , STRUBLE Leslie J ^4, , HU Shuguang ^5,

1.Key Laboratory for Silicate Materials Science and Engineering Wuhan University of Technology,Wuhan,430070,China;Department of Civil and Environmental Engineering,University of Illinois at Urbana-Champaign,Urbana,IL61801,USA

2.Key Laboratory for Silicate Materials Science and Engineering Wuhan University of Technology,Wuhan,430070,China

3.Department of Civil and Environmental Engineering,University of Illinois at Urbana-Champaign,Urbana,IL61801,USA;School of Science,Wuhan University of Technology,Wuhan,430070,China

4.Department of Civil and Environmental Engineering,University of Illinois at Urbana-Champaign,Urbana,IL61801,USA

5.Key Laboratory for Silicate Materials Science and Engineering Wuhan University of Technology,Wuhan,430070,China

Keywords： calcium silicate hydrate

The samples of the C-S-H series were synthesized by hydrothermal reaction of fumed silica,CaO and deionized water at initial C/S ratios between 1.0-1.7.Phase composition and structural and morphology characteristics of C-S-H samples were analyzed by XRD,IR and SEM.The experimental results showed that the d-spacing of(002),(110)and(020)decreased,the d-spacing of(200)increased,and the d-spacing of(310)varied randomly,the polymerization of silica tetrahedra of C-S-H decreased,and morphology of C-S-H samples varied from sheet shapes to long reticular fibers as C/S ratio increased.

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