Used to verify the homogeneity of concrete in relation to its workability or plasticity. This test method has particular application for concretes containing chemical admixtures.
The apparatus consists of a metal box divided into two parts and fit with an electrical vibrator system. During operation the concrete is poured into the first section of the box and then the dividing plate is removed. The vibrator is immediately switched on and the time is recorded when the concrete has spread uniformly across the whole box.
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