Stainless steel slump test device operation method - Database & Sql Blog Articles

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Kaixin micro test

Test probe P100-M3

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

Product Name:

Stainless Steel Slump Test Device

Stainless Steel Slump Test Device

Method of Operation

1. First, dampen the slump cylinder, iron shovel, mixing board, and other tools with a wet cloth. The slump cylinder is in a conical shape, with an upper diameter of 100mm, a lower mouth diameter of 200mm, and a height of 300mm.

2. Weigh the materials according to the mix ratio: first weigh the cement and sand, then pour them into the mixing board. Mix thoroughly on the board, then add the aggregate. Use a shovel to stir the center of the pile, and pour half of the required water. Mix well, then add the remaining water and continue mixing until the mixture is uniform. The total mixing time should be around 4–5 minutes.

3. Place the slump cylinder on a non-absorbent rigid plate, position the funnel above it, and step on the pedal to begin filling. Fill the mixture in three layers, each approximately one-third the height of the cylinder. Insert the tamping rod from the edge to the center in a spiral pattern, 25 times per layer, without impact. Distribute the material evenly across the interface. When inserting the bottom layer, ensure the rod reaches the full depth. For the next two layers, insert the rod 20–30mm into the previous layer.

4. After filling, trim the excess mixture with a straightedge and smooth the top surface. Remove any concrete around the base of the cylinder. Lift the slump cylinder slowly within 5–10 seconds, ensuring no lateral or torsional forces are applied. The entire process from loading to removing the cylinder should take no more than 150 seconds.

5. Position the slump cylinder next to the concrete sample, place a ruler across the top of the cylinder toward the mixture. Measure the vertical distance from the bottom of the ruler to the highest point of the sample using a steel ruler. This measurement is the slump of the concrete, accurate to 1mm, and rounded to the nearest 5mm. If the sample collapses or shears during the test, retest. If the issue persists, the concrete may be too difficult to handle and should be noted.

6. When the slump exceeds 220mm, measure both the maximum and minimum diameters of the spread concrete. If the difference between the two is less than 50mm, use the average as the slump spread value. Otherwise, the test is invalid. The slump spread is measured to the nearest 1mm and rounded to the nearest 5mm.