Research On Preparation Of C20～C40 Self-Compacting Concrete Using Super-Fine Mountain Sand And Artifical Sand

Self-compacting concrete is a kind of concrete with low w/b ratio and good workability, which does not need to pug. It is a trend for both the researchers and the concrete engineer. The sand is lack in the western China, so preparing self-compacting concrete with low and middle strength with Super Fine Mountain Sand and Artifical Sand is necessary.In this paper, the so preparing self-compacting concrete with low and middle strength using Super Fine Mountain Sand Artifical Sand and Phosphorus Slag is studied systemically. Through the study the influence of the shape, the proportion of the dust and the grade of sand to the workability and the mechanical property of self-compacting concrete, it is found that Super Fine Mountain Sand Artifical Sand are not suit to prepare low and middle strength self-compacting concrete, but when they are combined and the additive and assistant band material are used, C20-C40 high performance self-compacting concrete is prepared ; the corresponding additive is developed to solve the delamination caused by the low proportion of banding material; the evaluating system for the workability of low and middle strength self-compacting concrete is built; the controlling method for production, construction and curing was set up. And the result of the research is applied into several projects.