👉Standard Steps for Measuring Slump of Concrete ( following ASTM C143 / AASHTO T119 ):
💫1. Prepare the Equipment:
● Slump cone (Abrams cone), base plate, tamping rod, and measuring scale.
● Ensure all tools are clean and damp to avoid sticking.
💫2. Position the Cone:
● Place the slump cone on a flat, non-absorbent surface.
● Hold the cone firmly by stepping on its footpieces.
💫3. Fill the Cone in Three Layers:
● Add fresh concrete in three equal layers (each 1/3rd of cone height).
● Avoid overfilling or underfilling.
💫4. Tamp Each Layer:
● Compact each layer with 25 uniform strokes of the tamping rod.
● Penetrate slightly into the layer below when tamping the upper layers.
💫5. Strike Off the Top:
● After the final layer, level the surface with the tamping rod to make it flush.
💫6. Lift the Cone Vertically:
● Carefully lift the cone straight upward in 5–10 seconds without twisting or tilting.
💫7. Measure the Slump:
● Immediately measure the vertical difference between the height of the cone and the highest point of the slumped concrete.
💫8. Record the Slump Type:
● True slump: Uniform subsidence ( desirable ).
● Shear slump: Concrete slides sideways ( may indicate lack of cohesion ).
● Collapse slump: Concrete collapses completely ( too wet or high workability ).
📜Summary:
⏺This procedure outlines the standardized method for determining the slump of fresh concrete using a slump cone apparatus.
⏺The test measures the vertical settlement of concrete under its own weight, which indicates its workability and consistency.
⏺Accurate measurement of slump is essential for assessing the suitability of the concrete mix for various construction applications, ensuring ease of placement and compaction without segregation.
⭐️Conclusion
⏺By adhering to the outlined procedure, the slump of concrete can be measured with precision, providing essential data on its consistency, cohesiveness, and workability. This measurement serves as a critical quality control parameter, ensuring that the concrete mix conforms to specified requirements and supports proper placement, compaction, and structural performance.
@etconp
💫1. Prepare the Equipment:
● Slump cone (Abrams cone), base plate, tamping rod, and measuring scale.
● Ensure all tools are clean and damp to avoid sticking.
💫2. Position the Cone:
● Place the slump cone on a flat, non-absorbent surface.
● Hold the cone firmly by stepping on its footpieces.
💫3. Fill the Cone in Three Layers:
● Add fresh concrete in three equal layers (each 1/3rd of cone height).
● Avoid overfilling or underfilling.
💫4. Tamp Each Layer:
● Compact each layer with 25 uniform strokes of the tamping rod.
● Penetrate slightly into the layer below when tamping the upper layers.
💫5. Strike Off the Top:
● After the final layer, level the surface with the tamping rod to make it flush.
💫6. Lift the Cone Vertically:
● Carefully lift the cone straight upward in 5–10 seconds without twisting or tilting.
💫7. Measure the Slump:
● Immediately measure the vertical difference between the height of the cone and the highest point of the slumped concrete.
💫8. Record the Slump Type:
● True slump: Uniform subsidence ( desirable ).
● Shear slump: Concrete slides sideways ( may indicate lack of cohesion ).
● Collapse slump: Concrete collapses completely ( too wet or high workability ).
📜Summary:
⏺This procedure outlines the standardized method for determining the slump of fresh concrete using a slump cone apparatus.
⏺The test measures the vertical settlement of concrete under its own weight, which indicates its workability and consistency.
⏺Accurate measurement of slump is essential for assessing the suitability of the concrete mix for various construction applications, ensuring ease of placement and compaction without segregation.
⭐️Conclusion
⏺By adhering to the outlined procedure, the slump of concrete can be measured with precision, providing essential data on its consistency, cohesiveness, and workability. This measurement serves as a critical quality control parameter, ensuring that the concrete mix conforms to specified requirements and supports proper placement, compaction, and structural performance.
@etconp
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