Nanoindentation Characterization of Calcium-Silicate-Hydrate with Different Curing Conditions
The calcium-silicate-hydrate(C-S-H) existing in cement-based materials has been focused on for a long time,however,the nanometer-scale properties are rarely concemed,because of its complicated structure. In this paper we study the nanomechanical properties of C-S-H by nanoindentation measurement,particular attention is paid to the pastes cured for 2 days and 28 days,respectively, both at 20℃ and 60℃. The results demonstrate in all cases the existence of two types of C-S-H with low stiffness and high stiffness. Also,the two types of C-S-H are of different characteristic modulus. The average modulus of each C-S-H is almost the same for all pastes tested,indicating that the heat curing process does not change the intrinsic mechanical properties of the C-S-H. However,the volumetric proportion of two types of CSH is changed at 60 ℃ compared to that at 20℃ at the early age.
Calcium-Silicate-Hydrate Nanomechanical property Reduced elastic modulus
Dan Song Wu Yao Kang Liang Li He
Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University,1 Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education,Tongji University,12
国际会议
Frist Annual Meeting on Testing and Evaluation of Inorganic Materials(第一届全国无机材料测试与评价学术年会)
南昌
英文
613-616
2010-04-28（万方平台首次上网日期，不代表论文的发表时间）