Applications of Slump Test
The slump test is used to ensure uniformity for different batches of similar concrete under field conditions and to ascertain the effects of plasticizers on their introduction.
This test is very useful on site as a check on the day-to-day or hour- to-hour variation in the materials being fed into the mixer. An increase in slump may mean, for instance, that the moisture content of aggregate has unexpectedly increases.
Other cause would be a change in the grading of the aggregate, such as a deficiency of sand.
Too high or too low a slump gives immediate warning and enables the mixer operator to remedy the situation.
This application of slump test as well as its simplicity, is responsible for its widespread use.