Flow Test indication of the quality of concrete and measure the workability of the concrete, some tables have markings on the surface to indicate the flow diameter.
In this test, a standard mass of concrete is subjected to jolting.
The spread or the flow of the concrete is measured and this flow is related to workability.
Prevent skin contact with wet cement or concrete by wearing suitable protective clothing (P.P.E.).
If cement or concrete enters the eye, immediately wash it out thoroughly with clean water and seek medical treatment without delay.
Wash wet concrete off the skin immediately.
Component Parts of a Flow Table
Step 1
First, find a suitable location for a flow table.
It must be placed on a firm, flat and level surface.
It may be necessary to prepare an area for the table.
Empty the sampling buckets onto the mixing tray and scrape each bucket clean
Thoroughly remix the sample as described for the slump test
Step 2
Step 3
Ensure the mould and table are clean and damp.
Place the mould on the centre of the table and stand on the foot-pieces
Fill the mould in two layers, tamping each layer ten times with the tamping bar.
If necessary add more concrete to fill the top layer.
Use the tamping bar to strike the top layer level with the top of the mould.
Carefully clean off spillage from around the mould and tabletop
Wait 30 seconds from striking off Carefully lift the mould straight up and clear to a count of between 3 and 6 seconds
Step 4
Step 5
Stabilise the flow table by standing on the toe board at the front of the table.
Slowly lift the tabletop by the handle until it reaches the upper stop and allows the table to fall freely.
Repeat this cycle to give a total of 15 drops.
Each cycle should take about 4 seconds.
Measure the largest dimension of concrete spread in two directions, parallel to the table edges
Record the flow value as d1 + d2 divided by 2
Report any segregation which may have occurred around the sample edge.
Complete the sampling and testing certificates
Step 6
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