1batching ofingredientsmixingfreshconcreteplacing &curinghardenedconcretePRODUCTION OF CONCRETEProperties of Fresh ConcreteDesirable characteristic:a) ease of transport and placement b) resistance to bleeding and segregationConsistency - describes the ease of flow of the fresh concrete.Cohesiveness - describes the water holding capacity (or resistance to bleeding) and the coarse-aggregate holding capacity (or resistance to segregation) of the fresh concrete.Workability - describes the composite property of both consistency and cohesiveness of the fresh concrete.(1) Slump Test (ASTM C 143) - A consistency test for fresh concrete.Procedure:(1) Fill the cone mold 1/3 full by volume ( 2 3/8 inches in height).(2) Rod 25 times uniformly.Cone Mold: Height = 12 inches. Base diameter = 8 inches. Top diameter = 4 inches.
has intentionally blurred sections.
Sign up to view the full version.
2Slump Test Procedure (Continued)(3) Fill cone 2/3 full by volume (6 1/8 inches in height).(4) Rod 25 times uniformly, just penetrating into previous layer.Slump Test Procedure (Continued)(5) Fill cone to overflowing.(6) Rod 25 times, just penetrating into the second layer.Slump Test Procedure (Continued)(7) Strike off excess concrete with rod.(8) Clean the overflow away from the base of the cone mold.