Late Activity Mechanism of Zeolite Powder Activated by Diethanol-Isopropanolamine and Triisopropanolamine

Abstract

Abstract: Diethanol-isopropanolamine and triisopropanolamine (DEIPA-TIPA) grinding & enhancing aid (GEA) was used for activating the late activity of zeolite powder (ZP). The particle size distribution of ZP was characterized by laser scattering particle size distribution analyzer. The composition, micro-morphology, CH content of hydration products were characterized by XRD, ESEM and TGA. The results show that the specific surface area of ZP increases by 85.4 m²·kg^-1 and the average particle size decreases by 1.45 μm when 0.04% (mass fraction) GEA (m(DEIPA):m(TIPA)=6:4) is added. Adding 10% (mass fraction) activated ZP to cement mortar, the activity index of ZP increases 7% in 28 d. DEIPA-TIPA GEA promotes the hydration process of ZP-cement system and the secondary hydration reaction of ZP through adsorption-dispersion mechanism and complexation, which enhances the strength of cement mortar to a certain extent by improving the uniformity and compactness of hydration products.

Key words: zeolite powder, grinding & enhancing aid, activation, adsorption-dispersion mechanism, complexation

CLC Number:

TQ172

WANG Xingang, CHEN Tao, ZHAO Hua, LI Yujie. Late Activity Mechanism of Zeolite Powder Activated by Diethanol-Isopropanolamine and Triisopropanolamine[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(9): 2891-2897.

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