Experimental Study On Creep Of Rock-filled Concrete

Shrinkage, creep of concrete is an important basic property of concrete material. They not only have an essential influence on the mass concrete structure durability, but also affect the design and construction of engineering structures. Rock-filled concrete technology is a new type of mass concrete construction technology, which developed on the basis of self-compacting concrete technique, and has been widely used in hydropower, highway, bridge engineering etc. At present, scholars at home and broad have done lots of research on creep property of ordinary concrete, but the research on creep property of rock-filled concrete has not carried out. At the same time, effects of rock-filled body on compressive, creep of Rock-filled concrete and the difference on creep property of Rock-filled concrete and SCC also need further study. Base on the above factors, this paper using experimental and numerical study on the research on shrinkage, creep properties of Rock-filled concrete and Self-compacting concrete. The study includes:1In laboratory conditions, testing the creep of large Rock-filled concrete specimens after age7day and28day. At the same time, testing the shrinkage of Rock-filled concrete. Tested the creep deformation and shrinkage deformation for330days. Through the analysis of the creep, specific creep and the creep coefficient data, research the creep law of Rock-filled concrete and the influence of age.2In laboratory conditions, testing the creep of large Rock-filled concrete specimens and large self-compacting concrete specimens after age28day. At the same time, testing the shrinkage of self-compacting concrete. Tested the creep deformation and shrinkage deformation for330days. Through the analysis of the creep, specific creep and the creep coefficient data, research the relationship of Rock-filled concrete and self-compacting concrete.3For the numerical simulation of creep behavior of self-compacting concrete and rock-filled concrete. Numerical simulation of LINK3D system, consider testing for temperature and humidity changes, concrete mix, and other factors, on two kinds of concrete creep simulation and its comparison with experimental data, analysis of two kinds of concrete creep law and feasibility of numerical simulation.