Evaluation of Tensile Softening Behavior of Cement-paste and Mortar Deteriorated by NaCl Solution
By Taito Miura and Yasuhiko Sato
Concrete Research and Technology
Vol.21, No.3, Sep 2010 (Issue 54)
- Synopsis:
- In this study, cement paste and mortar specimens were immersed in NaCl solution for 2 months. After that three points bending test of the specimens and chemical analyses were conducted so as to determine tension softening curves, which can be applicable to meso-scale analysis, from load-displacement curves using a back analysis and to clarify how amount of cement hydrates affects the tension softening behavior. It was found, as a result, that tensile strength, Young's modulus and fracture energy of mortar specimens become smaller as the amount of cement hydrate CH decreases. Furthermore tension softening model which can consider the change in amount of cement hydrates was proposed.
- Keywords:
- CH, CSH, Meso-scale, Tensile strength, Elastic modulus, Fracture energy, Tensile softening diagram
