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- Title
石墨烯改性混凝土的制备及其力学性能和抗冻性能研究.
- Authors
张雪梅; 刘荣桂; 戴 丽; 周 恺
- Abstract
Using ordinary Portland cement P.O42.5 as matrix material and graphene as reinforcing material, modified concrete with different graphene doping contents(0, 0.04 wt%, 0.08 wt% and 0.12 wt%) was prepared. The effects of graphene doping on the crystal structure, micro morphology, mechanical properties and frost resistance of modified concrete were studied. The results showed that the doping of graphene didn’t produce new hydration products, but accelerated the rate of hydration reaction, and the generated hydration product gel was filled into the cracks of concrete and improved the compactness of concrete. When the content of graphene was 0.08 wt%, the number of pores in the modified concrete was the least, the compactness was the largest, and its morphology was the best. The compressive strength of graphene modified concrete at each curing age first increased and then decreased with the increase of graphene doping amount. At the curing age of 28 d, when the doping amount of graphene was 0.08 wt%, the compressive strength of modified concrete reached the maximum value of 48.62 MPa. After 60 freeze-thaw cycles, when the content of graphene was 0.08 wt%, the minimum mass loss rate of modified concrete was 0.414%, and the maximum relative dynamic elastic modulus was 94.02%. The frost resistance of graphene modified concrete was significantly improved. The comprehensive analysis showed that the optimum doping amount of graphene in modified concrete was 0.08 wt%. Reset
- Publication
Journal of Functional Materials / Gongneng Cailiao, 2023, Vol 54, Issue 4, p04087
- ISSN
1001-9731
- Publication type
Article
- DOI
10.3969/ji.ssn.1001-9731.2023.04.011