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Title: Microwave study of hydration of slag cement blends in early period
Authors: Zhang, X. 
Ding, X.Z.
Lim, T.H.
Ong, C.K. 
Tan, B.T.G. 
Yang, J.
Issue Date: Jul-1995
Citation: Zhang, X.,Ding, X.Z.,Lim, T.H.,Ong, C.K.,Tan, B.T.G.,Yang, J. (1995-07). Microwave study of hydration of slag cement blends in early period. Cement and Concrete Research 25 (5) : 1086-1094. ScholarBank@NUS Repository.
Abstract: Microwave technique were used to investigate the early hydration of slag cement with different slag percentages, different activators and different amount of activator. It is found that higher slag cement causes a higher dielectric constant ε{lunate} and a shorter induction period. But higher slag cement samples have very different electrical conductivity a compared with that of pure cement, their σ curves have two extra bumps in 9-14 h and 22-24 h. We found that the addition of 2% NaOH and Na2SO4 results in large changes in ε{lunate} whereas the addition of 2% Ca(OH)2 causes a little change in ε{lunate}. Addition of 2% Ca(OH)2 decreases the a but addition of 2% NaOH and Na2SO4 increases the σ. We also found that the greater the amount of Na2SO4 the smaller the ε{lunate} but the greater the σ. The relation between the compressive strength results and the ε{lunate} and a results are also discussed. © 1995.
Source Title: Cement and Concrete Research
ISSN: 00088846
Appears in Collections:Staff Publications

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