Testing self compacting concrete: Slump-flow test
The Slump-flow test to BS EN 12350-8 is used to assess flowability and flow rate. It is similar to BS EN 12350-2 Slump test.
· Place cone on steel plate at 210mm diameter marking · Pour into slump cone (no compaction) · Strike surplus material and lift within 30 sec · Vertical motion taking between 1-3 sec · Measure time from start of lift to time when first touches 500mm diameter mark (t500 time) . Measure largest diameter in two directions at 90° to nearest 10mm · Take average to obtain Slump Flow (SF) to nearest 10mm · If difference >50mm repeat test · If repeat >50mm then not suitable flowability for Slump Flow test · Check for signs of segregation eg ring of cement paste/mortar or segregated coarse aggregate in centre
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