Effect of magnesium silicate hydrate (M-S-H) formation on the local atomic arrangements and mechanical properties of calcium silicate hydrate (C-S-H): In situ X-ray scattering study

被引:28
作者
Kim, Gyeongryul [1 ]
Im, Sumin [1 ]
Jee, Hyeonseok [2 ]
Suh, Heongwon [1 ]
Cho, Seongmin [1 ]
Kanematsu, Manabu [3 ]
Morooka, Satoshi [4 ]
Koyama, Taku [3 ]
Nishio, Yuhei [3 ]
Machida, Akihiko [5 ]
Kim, Jihoon [6 ]
Bae, Sungchul [1 ]
机构
[1] Hanyang Univ, Dept Architectural Engn, Seoul 04763, South Korea
[2] Univ Illinois, Dept Civil & Environm Engn, Champaign Newmark 2145A,205 N Mathew, Urbana, IL USA
[3] Tokyo Univ Sci, Fac Sci & Technol, Dept Architecture & Bldg Engn, 2641 Yamazaki, Chiba 2788510, Japan
[4] Japan Atom Energy Agcy, Mat Sci Res Ctr, Tokai, Ibaraki 3191195, Japan
[5] Natl Inst Quantum & Radiol Sci & Technol, Synchrotron Radiat Res Ctr, Hyogo 6795148, Japan
[6] Muroran Inst Technol, Dept Civil Engn & Architecture, Hokkaido 0508585, Japan
基金
新加坡国家研究基金会;
关键词
Calcium silicate hydrate; Magnesium silicate hydrate; Local atomic arrangement; Elastic modulus; X-ray scattering; LOW-PH CEMENT; PORTLAND CEMENTS; SULFATE ATTACK; PART I; SI-29; NMR; ALUMINUM; MODEL; FTIR; ENVIRONMENT;
D O I
10.1016/j.cemconres.2022.106869
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This study explored the effect of M-S-H formation on the local atomic arrangements and mechanical properties of C-S-H. The elastic moduli of the samples were calculated using shifted atomic distances (r) and d-spacings (d) acquired by applying an external load on the pastes during X-ray scattering experiments. The experimental results indicated that the crystal structure of C-S-H remained intact with MgCl2 addition. At the highest Mg/Si ratio (Ca/Si = 0.6, Mg/Si = 0.2), change in the dominant phase occurred from C-S-H to M-S-H because the low pH environment hindered the formation of C-S-H and facilitated the formation of M-S-H. The elastic modulus decreased with increasing Mg/Si ratio up to 0.1 owing to both C-S-H destabilization and low M-S-H content in the samples. Conversely, the elastic modulus increased in the paste synthesized with the highest Mg/Si ratio because considerable M-S-H had formed, which exhibited a higher elastic modulus than C-S-H.
引用
收藏
页数:17
相关论文
共 72 条
[1]   Incorporation of aluminum in the calcium silicate hydrate (C-S-H) of hydrated Portland cements:: A high-field 27Al and 29Si MAS NMR Investigation [J].
Andersen, MD ;
Jakobsen, HJ ;
Skibsted, J .
INORGANIC CHEMISTRY, 2003, 42 (07) :2280-2287
[2]   A preliminary assessment of the use of an amorphous silica residual as a supplementary cementing material [J].
Anderson, D ;
Roy, A ;
Seals, RK ;
Cartledge, FK ;
Akhter, H ;
Jones, SC .
CEMENT AND CONCRETE RESEARCH, 2000, 30 (03) :437-445
[3]   Direct determination of amorphous number density from the reduced pair distribution function [J].
Antipas, Georgios S. E. ;
Karalis, Konstantinos T. .
METHODSX, 2019, 6 :601-605
[4]   Pair distribution function analysis of nanostructural deformation of calcium silicate hydrate under compressive stress [J].
Bae, Sungchul ;
Jee, Hyeonseok ;
Kanematsu, Manabu ;
Shiro, Ayumi ;
Machida, Akihiko ;
Watanuki, Tetsu ;
Shobu, Takahisa ;
Suzuki, Hiroshi .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2018, 101 (01) :408-418
[5]  
Bell G.M. M., 1990, ADV CENT RES, V3, P23
[6]   Characterization of magnesium silicate hydrate (M-S-H) [J].
Bernard, Ellina ;
Lothenbach, Barbara ;
Chlique, Christophe ;
Wyrzykowski, Mateusz ;
Dauzeres, Alexandre ;
Pochard, Isabelle ;
Cau-Dit-Coumes, Celine .
CEMENT AND CONCRETE RESEARCH, 2019, 116 :309-330
[7]   Magnesium and calcium silicate hydrates, Part II: Mg-exchange at the interface "low-pH" cement and magnesium environment studied in a C-S-H and M-S-H model system [J].
Bernard, Ellina ;
Dauzeres, Alexandre ;
Lothenbach, Barbara .
APPLIED GEOCHEMISTRY, 2018, 89 :210-218
[8]   Magnesium and calcium silicate hydrates, Part I: Investigation of the possible magnesium incorporation in calcium silicate hydrate (C-S-H) and of the calcium in magnesium silicate hydrate (M-S-H) [J].
Bernard, Ellina ;
Lothenbach, Barbara ;
Cau-Dit-Coumes, Celine ;
Chlique, Christophe ;
Dauzeres, Alexandre ;
Pochard, Isabelle .
APPLIED GEOCHEMISTRY, 2018, 89 :229-242
[9]   Effect of magnesium on calcium silicate hydrate (C-S-H) [J].
Bernard, Ellina ;
Lothenbach, Barbara ;
Le Goff, Fabien ;
Pochard, Isabelle ;
Dauzeres, Alexandre .
CEMENT AND CONCRETE RESEARCH, 2017, 97 :61-72
[10]   Geochemical impact of a low-pH cement liner on the near field of a repository for spent fuel and high-level radioactive waste [J].
Berner, Urs ;
Kulik, Dmitrii A. ;
Kosakowski, Georg .
PHYSICS AND CHEMISTRY OF THE EARTH, 2013, 64 :46-56