氧化石墨烯对水泥基自流平砂浆性能的影响

doi:10.11896/cldb.201902008

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Abstract In this paper, a graphene oxide (GO) dispersion at a concentration of 7.4 g/L was prepared by oxidation and ultrasonic dispersion, and was then added into the cement-based self-leveling mortar to determine the effects of GO dose on fluidity, setting time, mechanical properties and the durability of the fresh and hardened mortar. Moreover, the modification mechanism was analyzed by means of XRD, SEM and MIP. We found that the best dosage of GO is 0.04wt%, under which, compared to the control sample, the self-leveling mortar achieves increments in fle-xural strength ,compressive strength ,wear-resistance of 38.9%, 27.7% and 48.8%, respectively, the chloride ion permeability of the sample was 98.5% lower than that of the blank sample, although there can be observed slight decreases in fluidity and setting time. Microscopic test results indicated that the GO can promote the hydration process of Portland cement and regulate the microstructure of the hydration products, and in consequence, contribute to mechanical properties and durability improvements of the hardened cement-based self-leveling mortar.

Key words： graphene oxide self-leveling mortar chloride ion penetration durability

Published: 31 January 2019

CLC number:

TQ050.4+3

Fund:This work was financially supported by the National Natural Science Foundation of China(51872137).

About author:: Zerui Zhang received his M.S. degrees in June 2017 from Nanjing University of Technology in engineering. He was mainly engaged in the research of cement-based composites.Dongxu Li as a post-doctoral, professor and doctoral supervisor, he is mainly engaged in comprehensive utilization of cement and concrete chemistry, physical chemistry of materials and solid waste resources. He has hosted and participated in the projects of “973”, “863”, “11th five-year plan”, “12th five-year plan” and “national natural science foundation”. In the industrial waste gas as cement concrete materials, buil-ding materials research results outstanding.

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	张则瑞
	吴建东
	杨敬斌
	周建和
	李东旭

Cite this article:

张则瑞,吴建东,杨敬斌, et al. Effect of Graphene Oxide on Properties of Cement-based Self-leveling Mortar[J]. Materials Reports, 2019, 33(2): 240-245.

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http://www.mater-rep.com/EN/10.11896/cldb.201902008 OR http://www.mater-rep.com/EN/Y2019/V33/I2/240

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