NANOMECHANICAL PROPERTIES OF CEMENT PASTE: NANOINDENTATION, MODULUS MAPPING AND PEAK-FORCE QNM
Nanoidnetation, quantitative modulus mapping and peak-force Quantitative Nanomechanical Mapping (QNM) are applied to investigate the nanomechanical properties of hardened cement paste.It demonstrates that the three techniques provide the quantitative information on the surface topography and corresponding nanomechanical properties with different spatial resolutions.The results indicate that the measured elastic modulus by the nanoindentation is slightly higher than those obtained by modulus mapping and peak-force QNM techniques.The quantitative mapping of the local elastic modulus obtained by modulus mapping and peak-force QNM is able to discriminate different phases in cement paste.Moreover, the high resolution peak-force QNM can provide an efficient tool for identification of nanomechanical properties and particular sizes of Calcium Silicate Hydrate (C-S-H).
Cement paste Nanoindentation Modulus mapping Peak-force quantitative Nanomechanical mapping (QNM) Calcium-Silicate-Hydrate (C-S-H)
Wengui Li Jianzhuang Xiao Caijun Shi Surendra P.Shah
College of Civil Engineering, Hunan University, Changsha, 410082, Hunan China;College of Civil Engin College of Civil Engineering, Tongji University, Shanghai, 200092, China College of Civil Engineering, Hunan University, Changsha, 410082, Hunan China Center for Advanced Cement-based Materials, Northwestern University, Evanston, IL 60208
国际会议
厦门
英文
235-242
2014-06-05（万方平台首次上网日期，不代表论文的发表时间）