Study on macroscopic properties and engineering application of fiber reinforced cement-based composite blanket
It mainly investigated the mechanical properties and durability of fiber reinforced cement-based composite blanket,and examined their internal structure and early hydration behavior through CT scanning technology and hydration heat test,and explored the engineering practice of a cofferdam slope protection project.The results indicate that The combination of cement mortar matrix and three-dimensional spacer fabric makes the fiber reinforced cement-based composite blanket have good mechanical properties,frost resistance and dry-wet cycle resistance.The cross distribution of fibers in the cement blanket along the weft direction and the parallel distribution along the warp direction have a significant effect on the tensile strength and volume deformation of the cement blanket.The tensile strength in the weft direction is 1.25 times that in the warp direction,and the shrinkage deformation in the weft direction is greater than that in the warp direction.There are also obvious differences in the tensile and flexural breaking forms along the warp and weft directions.Compared with the traditional mixing molding,the unique water spraying molding process of cement blanket has lower hydration heat release rate and heat release,and the larger the amount of water sprayed,the lower the heat release.After one and a half years of application in a cofferdam slope protection project,the fiber-reinforced cement-based composite blankets showed no signs of cracking or settlement,demonstrating satisfactory performance.This technology is deemed suitable for and can be extended to projects featuring uneven base surfaces and soft foundations.
万方数据
维普
