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- W592374033 abstract "Three check-up experiments including drying shrinkage, autogenous shrinkage, elliptical ring restraint were designed to investigate the effect of mineral micro-expansion agent, shrinkage-reducing agent and silica fume on volume stability of cement-based materials and their mechanisms. Results show that£o 1£© Mineral micro- expansion agent has stronger shrinkage- compensating effect, drying and autogenous shrinkage decreases with increase of mineral micro-expansion agent. When its quantity is 25 %, initial cracking time is extended to 82 hours. £¨2£© Drying and autogenous shrinkage increases with the silica fume content. When its quantity is 10%, initial cracking time is reduced to 22 hours, and cracking sensitivity achieves maximum. Thereby the quantity of silica fume should be properly controlled. £¨3£© Shrinkage-reducing agent which is not susceptible to temperature fluctuation can decrease cracking sensitivity of mortar significantly, and it has excellent compatibility with other admixtures. On this basis, a shrinkage-reducing crack- resistant cement-based materials was developed.With excellent volume stability, it could be applied in concrete cover of the significant project. Furthermore, the application of crack control technology in Changjiang Tunnel Engineering in Wuhan was also introduced, which was based on £¢mineral micro-expansion agent-shrinkage-reducing agent-hybrid fiber£¢." @default.
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- W592374033 date "2008-04-01" @default.
- W592374033 modified "2023-09-27" @default.
- W592374033 title "Shrinkage-reducing Crack-resistant Cement-based Material and Its Application" @default.
- W592374033 hasPublicationYear "2008" @default.
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