JCI Annual Convention in SENDAI

Presentation information

第39回コンクリート工学講演会

A.Material & Construction » Aggregate / Admixture

Aggregate / Admixture Ⅰ

Wed. Jul 12, 2017 10:00 AM - 12:15 PM Room 3 (Sakura 1 / Conference Building 2F)

座長:斎藤豪(土木), 盛岡実(建築)

[1009] HYDRATION MODEL OF CEMENT PASTE MIXED WITH EXPANSIVE ADDITIVE

Van NGUYEN DUC1, Hyeonggil CHOI1, Yukio HAMA2 (1.Muroran Institute of Technology 2.室蘭工業大学)

Keywords:Degree of hydration, Expansive additive, Hydration model, Isothermal Calorimetry., Kinetics

Although expansive additive (EX) has been widely used in concrete as an admixture to allay shrinkage cracking, little research has been done on modeling the hydration reaction of cement paste mixed with an expansive additive. In this research, the hydration process of ordinary Portland cement (OPC) and Portland cement-expansive additive blends were evaluated by using isothermal calorimetry method. Besides, based on the shrinkage-core model, this research represents hydration model that describes the heat evolution of OPC and cement-expansive additive blends. The parameters of this model were determined by fitting to experimental results. Using the proposed model, the degree of hydration and the rate of heat evolution were predicted. A comparison between predicted and measured results was performed and shown a good agreement.