Rheology of pure and mineral admixture modified cement pastes and their degradation due to calcium leaching

2nd International Symposium on Application of Materials Science and Energy Materials

材料科学;能源学

Yang, Hu^1 ; Lu, Cairong^1 ; Liu, Weibao^1 ; Mei, Guoxing^1 ; Wang, Heng^1 ; Ge, Xueliang^1

Nanjing Hydraulic Research Institute, State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, RandD Center of Hydropower Engineering Safety and Environmental Technology, NEA, Nanjing, China^1

关键词: Calcium leaching;    Cement paste;    Linear correlation;    Mineral admixtures;    Prediction model;    Rheological parameter;    Rheology testing;    Uniaxial compressive tests;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/490/3/032031/pdf
DOI  :  10.1088/1757-899X/490/3/032031

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This paper is to deal with the modeling of compressive strength of leached pastes subjected to aggressive lechant. Firstly, rheology testing was performed on fresh pastes by using Con-Tec Viscometer. The slump flows in relation to rheological parameters were obtained. Then uniaxial compressive test was carried out on both well-preserved and corrosive pastes. The loss of compressive strength has a significant linear correlation with leached ratio for all pastes specimens. Finally, a prediction model forecasting reduction in strength was proposed.