Abstract:The damping property and micro-mechanism of cementitious materials with mutilayer graphene oxide and modified silica fume (MGO-MSF) were studied.The order of influencing factors on compressive strength was determined by means of an orthogonal design and a range analysis.The compressive strength, loss factor, and pore structure, micro-morphology of hardened cement paste were characterized by the dynamic thermomechanical analysis and the mercury intrusion porosimetry and environmental scanning electron microscopetest, respectively.The results show that the compressive strength by the addition of MGO-MSF (B4) is greater by 25%-30% than that by the addition of polymer emulsion (J1), while the loss factor of B4 is only inferior by 15%-20% to that of the J1.Keeping the mass ratio of MGO to MSF at 1 ∶99, the loss factor increases firstly and then decreases as the number of the otal amount of admixtures (3%, 5%, 7%) increases.The compressive strength of B4 is higher than that of J1 owing to the fact that MGO-MSF promotes the hydration reaction which makes B4 produce a large amount of C-S-H gel and C-S-H gel pores.Meanwhile, a mass of small capillary pores of J1 improve the effect of energy dissipation and enhance the loss factor, which results in that the loss factor of J1 is higher than that of B4.
王信刚,黄昱清,张晨阳. 混掺MGO-MSF的水泥基材料的阻尼特性与微观结构[J]. 振动与冲击, 2021, 40(2): 193-198.
WANG Xingang,HUANG Yuqing,ZHANG Chenyang. Damping property and microstructure of cementitious materials with mutilayer graphene oxide and modified silica fume. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(2): 193-198.
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