Shenghua LvShaanxi University of Science and Technology, China
Lv Shenghua, Materials Doctor, now is a Professor and Doctorial supervisor at the College of Resource and Environment of Shaanxi University of Science and Technology. He teaches and researches the correlation of structure and mechanical properties of cement-based composites, applied chemistry. He got his Doctor’s degree in macromolecular materials at Northwestern Polytechnical University. He has conducted three of the National natural Science Foundation Projects. He has published more than about 100 papers and 30 are cited by SCI and 50 are cited by EI. His a Research result has won the national scientific and technological progress second prize
Title：Effect of GO nanosheets on cement hydration crystals and its impact on the mechanical properties
SymposiumB16 Building Materials
Starting Time2015-10-28 14:25:00
Ending Time2015-10-28 14:50:00
Abstract
Graphene oxide (GO) nanosheets are prepared by oxidation of graphite followed by sonication exfoliation. FTIR and AFM results indicate that the GO surface is covered with oxygenated groups (–OH, –O–, –COOH and –SO3H). Hardened cement pastes containing different proportions of GO nanosheets are prepared, and it is found that GO can promote the cement paste to form ruled microstructure. The compressive strength and toughness of the corresponding hardened cement paste are found to increase markedly compared with a control sample. The results suggest that GO nanosheets can control the crystalline form and the assembly of cement hydration products. A formation mechanism for regular hydration crystals is proposed, based on the experimental results. This research indicates significant potential for the practical application of GO nanosheets in the preparation of cement-based materials of high strength and durability.
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