Abstract
Fluidity of fresh concrete is an important performance, and it can be evaluated by concrete flow process. Before the experiments, the theory of the lateral spread and accumulation were assumed. Then, the velocity and spread characteristics of concrete with different water content on an inclined plane were studied. Spatial filtering velocimetry (SFV) was used to measure the free-surface spreading evolution of concrete of a fixed volume slowly released onto a slope. The velocity gradients along the flow direction were calculated in the steady zone and the results showed that the velocity gradient was a reasonable indicator to assess concrete fluidity. Based on these analysis and results, the flow depth during the flow process was estimated too.
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