Abstract
The enhancement effects of GH admixture on the early strengths of fly ash concrete and mortar were studied, and the mechanism was analyzed by X-ray diffraction (XRD) and scanning electro microscope (SEM). Experimental results show that, by the incorporation of GH admixture, both of cement hydration and pozzolanic reaction of fly ash are accelerated, the strengths of fly ash concrete and mortar are enhanced noticeably, especially the early strength. With a mixture design of 200 kg/m3 OPC (Ordinary Portland Cement), 200 kg/m3 fly ash and 50 kg/m3 GH admixture, the strength of concrete at 1 d, 3 d and 28 d reaches 25 MPa, 50 MPa and 70 MPa respectively.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Mittal P K, Kumar K. Experience in Separate Grinding Systems for Blended Cement[G]. World Cement, Farnham. UK: Palladian Publishing Ltd. 1996, 42–44
Mltais Y M, Marchand J. Influences of Curing Temperature on Cement Hydration and Mechanical Strength Development of Fly Ash Mortars[J]. Cement and Concrete Research, 1997, 27(7):1 365–1 377
C Shi, J Qian. Pozzolanic Reaction and Microstructure Development of Activated Lime-fly Ash Paste[J]. ACI Materials Journal, 1998, 95(5):537–545
Zichao Wu, Tarun R Naik. Chemically Activated Blended Cement[J]. ACI Materials Journal, 2003, 100(5):434–440
Poon C S, Kou S C, Lam L, et al. Activation of Fly Ash/Cement Systems Using Calcium Sulfate Anhydrite (CaSO4)[J]. Cement and Concrete Research. 2001, 31(6): 873–881
Brook J W, Berkey R A, Farzam H. Non-chloride Accelerating Admixture for Class F Fly Ash[J]. Concrete International. 1990, 12(10):51–54
Niu Quanlin, Feng Naiqian, Yang Jing. Packing of Superfine Mineral Powder in Cement[J]. Journal of Chinese Ceramic Society, 2004, 32(1):102–106
Ba Hengjing, Feng Qi, Yang Yingzi. Hydration Reaction Between C3S and Fly Ash, Silica Fume and Microstructure of Hydrated Pastes[J]. Journal of Chinese Ceramic Society, 2002, 30(1):102–106
Kang Jingfu, Jin Qiulian, Wang Jiaying, et al. Strength Acceleration of Fly Ash Concrete by GH Additives[J]. Journal of Tianjin University, 2005, 38(6):543–546
Zhang Xiong, Wu Keru. Mechanism and Key Technique of Mineral Admixture[J]. Journal of Tongji University, 2004, 32(4):494–498
Author information
Authors and Affiliations
Corresponding author
Additional information
Funded by the National Nature Science Foundation of China (No. 50679054)
Rights and permissions
About this article
Cite this article
Kang, J., Wang, X. Effects of GH admixture on the early strength of fly ash concrete and mortar. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 23, 755–760 (2008). https://doi.org/10.1007/s11595-007-5755-1
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11595-007-5755-1