Effect of Flaky Nano Boehmite on Mechanical and Microscopic Properties of Cement

Abstract

Abstract: The addition of nanoparticles will affect the mechanical properties of materials. In this paper, flaky nano boehmite (FNB) was synthesized by the hydrothermal method in alkaline environment. The FNB was added to cement, and its influence on the mechanical properties of cement slurry was studied by hydration heat, X-ray diffraction, thermal analysis, nitrogen adsorption and scanning electron microscope. The results show that the addition of FNB obviously improves the early mechanical properties of cement paste, and when the content of FNB is 0.5% (mass fraction), the compressive strength of cement paste is increased by 42.8% to the maximum compared with the blank group. The addition of FNB can not only improve the hydration reaction rate of cement and promote the early hydration of cement, but also reduce the content of harmful pores, optimize the pore structure and improve the compactness of cement paste, thus promoting the development of early strength of cement. The research results provide a new method to improve the mechanical properties of cement paste.

Key words: cement paste, flake nano boehmite, compressive strength, hydrochemical product, hydration heat, pore structure, reinforcing mechanism

CLC Number:

TQ172

ZHU Jianping, ZHU Lifei, FENG Chunhua, QUE Yongbo, SONG Weiyin, ZHANG Wenyan, YANG Kuo. Effect of Flaky Nano Boehmite on Mechanical and Microscopic Properties of Cement[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(11): 3556-3564.

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