Characterization of carbonation-cured cement paste using X-ray photoelectron spectroscopy

被引:18
作者
Khoshnazar, Rahil [1 ]
Shao, Yixin [1 ]
机构
[1] McGill Univ, Dept Civil Engn & Appl Mech, 817 Sherbrooke St West, Montreal, PQ H3A 2K6, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Cement paste; Early-age carbonation; X-ray photoelectron spectroscopy; Quantitative X-ray diffraction; Sustainability; SILICATE; HYDRATION; CONCRETE; PHASES;
D O I
10.1016/j.conbuildmat.2018.02.175
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
X-ray photoelectron spectroscopy (XPS) was used to examine the microstructure of cement pastes following early-age CO2 curing. The samples were hydrated for 18 h, and, then, were exposed to high-purity gaseous CO2 at a pressure of 0.15 MPa for 6 h. They were subsequently hydrated until the age of 28 d. The samples were tested right after the carbonation process at the age of 1 d, as well as after the subsequent hydration. The results were compared with those obtained for the reference cement pastes which were not exposed to the carbonation curing. It was found that the calcium-silicate-hydrate (C-S-H) produced by the early-age carbonation had a more disordered and highly polymerized structure compared to that in the conventionally hydrated cement paste. The subsequent hydration significantly changed this structure, and resulted in the incorporation of additional calcium ions. The improved compressive strengths at both test ages were attributed to the higher polymerization of silicates in the cement pastes due to the early-age carbonation curing. Based on the quantitative X-ray diffraction results, more than 40% of C2S phase of cement was reacted in early carbonation at the age of 1 d. This accelerated reaction appeared to be a primary mechanism of the higher compressive strength at both early and late ages. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码:598 / 605
页数:8
相关论文
共 50 条
[31]   Application of X-ray Computed Tomography in Characterization Microstructure Changes of Cement Pastes in Carbonation Process [J].
Han Jiande ;
Sun Wei ;
Pan Gaughua ;
Wang Caihui ;
Rong Hui .
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION, 2012, 27 (02) :358-363
[32]   Application of X-ray computed tomography in characterization microstructure changes of cement pastes in carbonation process [J].
Jiande Han ;
Wei Sun ;
Ganghua Pan ;
Caihui Wang ;
Hui Rong .
Journal of Wuhan University of Technology-Mater. Sci. Ed., 2012, 27 :358-363
[33]   X-ray photoelectron spectroscopy characterization of amorphous and nanosized thin carbon films [J].
Avramova, I. ;
Dikovska, A. ;
Valcheva, E. ;
Terziiska, P. ;
Mladenoff, J. ;
Tzonev, L. ;
Kolev, S. ;
Milenov, T. .
20TH INTERNATIONAL CONFERENCE AND SCHOOL ON QUANTUM ELECTRONICS: LASER PHYSICS AND APPLICATIONS, 2019, 11047
[34]   Characterization of Ti/SnO2 Interface by X-ray Photoelectron Spectroscopy [J].
Martinez, Miranda ;
Chourasia, Anil R. R. .
NANOMATERIALS, 2022, 12 (02)
[35]   The electrochemical corrosion characterization of bulk nanocrystalline aluminium by X-ray photoelectron spectroscopy and ultra-violet photoelectron spectroscopy [J].
Wang, S. G. ;
Huang, Y. J. ;
Han, H. B. ;
Sun, M. ;
Long, K. ;
Zhang, Z. D. .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2014, 724 :95-102
[36]   Extraction of Effective Cement Paste Diffusivities from X-ray Microtomography Scans [J].
Karim, M. R. ;
Krabbenhoft, K. .
TRANSPORT IN POROUS MEDIA, 2010, 84 (02) :371-388
[37]   Quantitative measurement of the influence of degree of saturation on ion penetration in cement paste by using X-ray imaging [J].
Moradllo, Mehdi Khanzadeh ;
Ley, M. Tyler .
CONSTRUCTION AND BUILDING MATERIALS, 2017, 141 :113-129
[38]   X-ray absorption study of drying cement paste and mortar [J].
Hu, J ;
Stroeven, P .
CEMENT AND CONCRETE RESEARCH, 2003, 33 (03) :397-403
[39]   Surface analysis of dental amalgams by X-ray photoelectron spectroscopy and X-ray diffraction [J].
Uo, M ;
Berglund, A ;
Cardenas, J ;
Pohl, L ;
Watari, F ;
Bergman, M ;
Sjöberg, S .
DENTAL MATERIALS, 2003, 19 (07) :639-644
[40]   Uptake of Se(IV/VI) oxyanions by hardened cement paste and cement minerals: An X-ray absorption spectroscopy study [J].
Bonhoure, I ;
Baur, I ;
Wieland, E ;
Johnson, CA ;
Scheidegger, AM .
CEMENT AND CONCRETE RESEARCH, 2006, 36 (01) :91-98