TY - JOUR
T1 - Effect of New Alkanolamines on Cement Hydration and Hardening
AU - Xu, Zhiqiang
AU - Xu, Kai
AU - Sun, Jingfeng
AU - Hu, Yueyang
AU - Ma, Suhua
AU - Li, Weifeng
AU - Shen, Xiaodong
N1 - Publisher Copyright:
© 2017, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
PY - 2017/8/1
Y1 - 2017/8/1
N2 - Diethanolisopropanolamine (DEIPA), ethyldiisopropylamine (EDIPA), N,N,N',N'-tetrakis-(2-hydroxyethyl)-ethylenediamine (THEED) and N,N,N',N'-tetrakis-(2-hydroxypropyl)-ethylenediamin (THEED) were developed as chemical additives in cement pastes. The effect of alkanolamines on the cement hydration process and hardening properties as well as air contents was investigated. The results indicate that DEIPA and EDIPA can significantly improve the strength of cement mortar at various ages (by 4.4% and 10.4% at 56 d, respectively) and promote the degree of cement hydration. The transformation from AFt to AFm is accelerated by DEIPA and EDIPA, effectively optimizing the pore size distribution for a lower porosity. THEED and THPED can promote the cement hydration and increase the late strength, but adverse to the early strength of mortar due to their air-entraining performance. In addition, the addition range of THEED and THPED is wider than that of DEIPA and EDIPA.
AB - Diethanolisopropanolamine (DEIPA), ethyldiisopropylamine (EDIPA), N,N,N',N'-tetrakis-(2-hydroxyethyl)-ethylenediamine (THEED) and N,N,N',N'-tetrakis-(2-hydroxypropyl)-ethylenediamin (THEED) were developed as chemical additives in cement pastes. The effect of alkanolamines on the cement hydration process and hardening properties as well as air contents was investigated. The results indicate that DEIPA and EDIPA can significantly improve the strength of cement mortar at various ages (by 4.4% and 10.4% at 56 d, respectively) and promote the degree of cement hydration. The transformation from AFt to AFm is accelerated by DEIPA and EDIPA, effectively optimizing the pore size distribution for a lower porosity. THEED and THPED can promote the cement hydration and increase the late strength, but adverse to the early strength of mortar due to their air-entraining performance. In addition, the addition range of THEED and THPED is wider than that of DEIPA and EDIPA.
KW - Alkanolamine
KW - Cement
KW - Hardening
KW - Hydration
UR - http://www.scopus.com/inward/record.url?scp=85031127305&partnerID=8YFLogxK
U2 - 10.14062/j.issn.0454-5648.2017.08.09
DO - 10.14062/j.issn.0454-5648.2017.08.09
M3 - 文章
AN - SCOPUS:85031127305
SN - 0454-5648
VL - 45
SP - 1113
EP - 1120
JO - Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society
JF - Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society
IS - 8
ER -