Estimating Na+ and K+ concentrations of the pore solution based on ex-situ leaching tests and thermodynamic modeling

RILEM Technical Letters

article

Atolo Tuinukuafe¹  Krishna Siva Teja Chopperla¹  Jason Weiss¹  Jason Ideker¹  Burkan Isgor¹ 

[1] Oregon State University

关键词: Cement;    Pore solution;    Leaching;    Thermodynamic Modeling;   

DOI  :  10.21809/rilemtechlett.2022.164

学科分类：社会科学、人文和艺术（综合）

来源: RILEM Publications SARL

【 摘 要 】

Ex-situ leaching (ESL) methods have typically yielded higher sodium and potassium concentrations than pore solutions obtained using the conventional high-pressure extraction approach since ESL concentrations require a back-calculation to account for dilution. This paper proposes a new method for adjusting the concentrations obtained from ESL. Thermodynamic calculations were used to determine the total pore solution content, and a pore partitioning model was then used to separate the total solution into gel and capillary assignments. Using the refined pore solution volumes to adjust the concentrations from ESL improved the correlation to PSE concentrations.

【 授权许可】

CC BY