Concrete Slump Testing
Slump Testing, continued
The concrete slump value determined in this test is used to find the water-cement ratio in mixes. By measuring the difference between the mold height and the height of the specimen, researchers are able to evaluate the concrete consistency. The test is carried out from batch to batch to ensure uniformity of different loads. For more information on concrete slump testing, please read our Concrete Slump Testing blog.
In most cases, the test is conducted according to the ASTM C143 specification. The test equipment required includes:
Slump Base Plate – The slump cone will sit on the base during the test and it should include bolt-on clamps to hold the cone steady during testing. A base plate with a handle will make it easier to remove and can also be used as a guide to measure the slump.
Graduated Tamping Rod – Used to both tamp the concrete mixture and measure the amount of slump.
Additional accessories that are not required, but can increase efficiency are:
Scoops – A round nose scoop with bowl dimensions 8.25" (210mm) length x 5.25" (133mm) width x 3" (76mm) depth.
Funnels – An aluminum funnel will assist in filling.
Brushes – Used to clean the concrete off of testing equipment after the test is complete.
Trowels – A forged steel trowel will assist in filling.
Humboldt's Concrete Slump Chart provides a range of slump values and their applications.
If you have questions or need help selecting equipment, please call us at 1.800.544.7220 or use our Ask Humboldt form.