Hydration Kinetics for Alkaline Activation of Slag from Color Variation Data

Molecules

Hong Sun¹  Jinghai Zhou¹  Yichao Zhang¹  Zhaoyang Ding¹  Qun Su¹  Hongguang Bian²  Fengxin Dong²  Qing Wang² 

[1] School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China;School of Material Science and Engineering, Shenyang Jianzhu University, Shenyang 110168, China;

关键词: alkali-activated slag;    hydration kinetics;    color variation;    average pixel value;    Krstulovic–Dabic kinetic model;   

DOI  :  10.3390/molecules26123764

来源: DOAJ

【 摘 要 】

In this study, we explore a new method based on color variation data to derive the kinetics of the entire process of the hydration of alkali-activated slag (AAS). Using this image analysis technique, we can monitor the induction period that cannot be observed using conventional microcalorimetry techniques. Color variation was recorded across a sequence of 9999 images, which were processed via MATLAB software package. Further, an average pixel value (APV) was determined to represent the color in each image. Reaction parameters, such as color variation velocity v(t), reaction speed ε(t), and hydration degree α(t), that govern the entire hydration process were determined. On the basis of the reaction parameters and a Krstulovic–Dabic kinetic model, integral and differential equations were derived to simulate the three basic processes of AAS hydration. Equations describing the reaction kinetics of AAS with solutions of three different concentrations of NaOH were extracted using this method.

【 授权许可】

Unknown