High-resolution high-speed nanoindentation mapping of cement pastes: Unravelling the effect of microstructure on the mechanical properties of hydrated phases

被引:70
作者
Sebastiani, M. [1 ]
Moscatelli, R. [1 ]
Ridi, F. [2 ,3 ]
Baglioni, P. [2 ,3 ]
Carassiti, F. [1 ]
机构
[1] Roma TRE Univ, Via Vasca Navale 79, I-00146 Rome, Italy
[2] Univ Florence, Dept Chem Ugo Schiff, Florence, Italy
[3] Univ Florence, CSGI, Florence, Italy
关键词
Cement; Nanoindentation; High-speed; Statistical; Mapping; Packing density; C-S-H; HIGH-PERFORMANCE CONCRETE; CALCIUM-SILICATE-HYDRATE; ORDINARY PORTLAND-CEMENT; ELASTIC PROPERTIES; CONSTITUENTS; NANOSCALE; NANOCOMPOSITES; NANOSILICA; BEHAVIOR;
D O I
10.1016/j.matdes.2016.02.087
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Cementitious materials represent the most used materials in the construction industry. Their strong heterogeneity and multiscale microstructure make the study of the mechanical properties and the in-service behaviour very challenging: new techniques are required by industrial research to better investigate these aspects. In this work a novel technique based on statistical nanoindentation is exploited to obtain results about the microstructure build-up and the mechanical properties. An innovative high-speed nanoindentation method is here combined and compared with a standard nanoindentation procedure in order to get highly consistent statistical results. Combining the high-speed nanoindentation, the statistical deconvolution and SEM/EDS investigations, the main phases present in the tested hydrated cement paste have been characterized. High-resolution maps of the mechanical properties are in good agreement with SEM-EDS results. The evolution of the mechanical properties has been tested over the time and in particular after 1, 3, 5, 7, 14 and 28 days of hydration. It was found that the nano-mechanical properties were almost constant during the hydration time and the evolution of the bulk mechanical resistance properties of the cement paste is found to be due to a variation of the volume proportions between the three principal phases (low-density, high-density and ultra-high-density C-S-H). (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:372 / 380
页数:9
相关论文
共 53 条
[1]  
Acker P., 2001, P 6 INT C CONCR 6 MI
[2]   Composition and density of nanoscale calcium-silicate-hydrate in cement [J].
Allen, Andrew J. ;
Thomas, Jeffrey J. ;
Jennings, Hamlin M. .
NATURE MATERIALS, 2007, 6 (04) :311-316
[3]   Effects of nanosilica addition on workability and compressive strength of Portland cement pastes [J].
Berra, M. ;
Carassiti, F. ;
Mangialardi, T. ;
Paolini, A. E. ;
Sebastiani, M. .
CONSTRUCTION AND BUILDING MATERIALS, 2012, 35 :666-675
[4]   Leaching behaviour of cement pastes containing nanosilica [J].
Berra, Mario ;
Paolini, Antonio Evangelista ;
Carassiti, Fabio ;
Sebastiani, Marco ;
Mangialardi, Teresa .
ADVANCES IN CEMENT RESEARCH, 2013, 25 (06) :352-361
[5]  
Bolshakov A., 1998, J MAT RES, V13
[6]   INTERPRETATION OF COMPOSITIONAL PATTERNS FOUND BY QUANTITATIVE ENERGY-DISPERSIVE X-RAY-ANALYSIS FOR CEMENT PASTE CONSTITUENTS [J].
BONEN, D ;
DIAMOND, S .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1994, 77 (07) :1875-1882
[7]   Comb-Shaped Polymers as Nanostructure Modifiers of Calcium Silicate Hydrate: A 29Si Solid-State NMR Investigation [J].
Cappelletto, Elisa ;
Borsacchi, Silvia ;
Geppi, Marco ;
Ridi, Francesca ;
Fratini, Emiliano ;
Baglioni, Piero .
JOURNAL OF PHYSICAL CHEMISTRY C, 2013, 117 (44) :22947-22953
[8]   A Coupled Nanoindentation/SEM-EDS Study on Low Water/Cement Ratio Portland Cement Paste: Evidence for C-S-H/Ca(OH)2 Nanocomposites [J].
Chen, Jeffrey J. ;
Sorelli, Luca ;
Vandamme, Matthieu ;
Ulm, Franz-Josef ;
Chanvillard, Gilles .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2010, 93 (05) :1484-1493
[9]   Multiscale structure of calcium- and magnesium-silicate-hydrate gels [J].
Chiang, W. -S. ;
Ferraro, G. ;
Fratini, E. ;
Ridi, F. ;
Yeh, Y. -Q. ;
Jeng, U-S. ;
Chen, S. -H. ;
Baglioni, P. .
JOURNAL OF MATERIALS CHEMISTRY A, 2014, 2 (32) :12991-12998
[10]   Microstructural changes of globules in calcium-silicate-hydrate gels with and without additives determined by small-angle neutron and X-ray scattering [J].
Chiang, Wei-Shan ;
Fratini, Emiliano ;
Ridi, Francesca ;
Lim, Sung-Hwan ;
Yeh, Yi-Qi ;
Baglioni, Piero ;
Choi, Sung-Min ;
Jeng, U-Ser ;
Chen, Sow-Hsin .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2013, 398 :67-73