Kelly ball apparatus, for determining the penetration of a hemispherical metal weight into freshly mixed concrete, which is related to the workability of the concrete. The apparatus consists of a cylinder with one end having a hemispherical shape and the other end fitted with a graduated handle. The weight assembly is lowered through a frame into the concrete and the penetration measured.
Middelblok 134
2831 BP Gouderak
Netherlands
+31 (0) 182 30 31 60
info@abmbv.nl