This Singapore Standard describes a method for determination of Vebe time of concrete of very low to low workability. The method applies to plain and air-entrained concrete made with lightweight, normal weight or heavy aggregates having a nominal maximum size of 40 mm or less but not to aerated concrete, no-fines concrete and concrete which cannot be compacted by vibration alone.
SS 78 Pt.A4-1987 history
1987SS 78 Pt.A4-1987 Testing Concrete Part A4 : Method For Determination Of Vebe Time